Door stabilizer

Claim 2

A movement restraining device comprising: first and second cooperable parts, the first part being securable to and adjacent the distal edge of a first member that is hinged about a pivot axis and the second part being securable to a second member relative to which said first member is pivotable, the parts being interengageable, each said part having at least two integral surface portions that, when the parts are secured to said members and interengaged, (a) are spaced differently from said pivot axis, (b) are closely adjacent, opposed to, and cooperable with said surface portions of the other part, and (c) are transversely of and spaced differently with respect to a line that lies along said first member and that is perpendicular to said pivot axis, said interengaged surface portions of the parts being readily separable when the second part is stationary relative to said pivot axis and the first part is moved in a predetermined path about said pivot axis and being otherwise inseparable through mutual interference between said cooperable surface portions.

Claim 3

A movement restraining device comprising first and second cooperable parts, the first part being securable to and adjacent the distal edge of a first member that is hinged about a pivot axis and the second part being securable to a second member relative to which said first member is pivotable, the parts being interengageable, each said part having at least two integral surface portions that, when the parts are secured to said members and interengaged, (a) are spaced differently from said pivot axis, (b) are closely adjacent, opposed to, and cooperable with said surface portions of the other part, and (c) are on one part at opposite sides of a projection and on the other part at opposite sides of a recess into which the projection is received, and (d) are transversely of and spaced differently with respect to a line that lies along said first member and that is perpendicular to said pivot axis, said interengaged surface portions of the parts being readily separable when the second part is stationary relative to said pivot axis and the first part is moved in a predetermined path about said pivot axis and being otherwise inseparable through mutual interference between said cooperable surface portions.

Claim 4

A movement restraining device comprising first and second cooperable parts, the first part being securable to and adjacent the distal edge of a first member that is hinged about a pivot axis and the second part being securable to a second member relative to which said first member is pivotable, the parts being interengageable, each said part having at least two integral surface portions that, when the parts are secured to said members and interengaged, (a) are spaced differently from said pivot axis, (b) are closely adjacent, opposed to, and cooperable with said surface portions of the other part, and (c) are on one part at opposite sides of a projection and on the other part at opposite sides of a recess into which the projection is received, and (d) are transversely of and spaced differently with respect to a line that lies along said first member and that is perpendicular to said pivot axis, said interengaged surface portions of the parts being readily separable when the second part is stationary relative to said pivot axis and the first part is moved in a predetermined path about said pivot axis and being otherwise inseparable through mutual interference between said cooperable surface portions.

Claim 5

A movement restraining device comprising first and second cooperable parts, the first part being securable to and adjacent the distal edge of a first closure member that is hinged about a pivot axis and the second part being securable to a second member relative to which said first member is pivotable, the parts being interengageable, each said part having at least two integral surface portions (a) that are spaced apart so that, when the parts are secured to said members, one of said surface portions of each part is farther from said pivot axis than the other, (b) that are closely adjacent, opposed to, and cooperable with said two integral surface portions of the other part when the parts are interengaged and (c) that are in part substantially perpendicular to the closure member and in part inclined thereto, said surface portions on one part forming opposite sides of a projection in which the inclined surface portions narrow the projection at its extending end and on the other part forming opposite sides of a recess into which the projection is received and in which the inclined surface portions cause the recess to be wider at its opening, said integral surface portions extending, when the parts are secured to members, in all respects transversely of a line that lies along said first member and that is perpendicular to the axis of pivotal movement, said interengaged surface portions on the parts being readily separable when the second part is stationary relative to said pivot axis and the first part is moved in a predetermined path about said pivot axis, and being inseparable through mutual interference between said cooperable surface portions when the two parts are moved concurrently about separate pivot axes or when forces act to cock one part relative to the other.

Claim 6

A movement restraining device comprising first and second cooperable parts, the first part being securable to and adjacent the distal edge of a first closure member that is hinged about a pivot axis and the second part being securable to a second member relative to which said first member is pivotable, the parts being interengageable, each said part having at least two integral surface portions (a) that are spaced apart so that, when the parts are secured to said members, one of said surface portions of each part is farther from said pivot axis than the other, (b) that are closely adjacent, opposed to, and cooperable with said two integral surface portions of the other part when the parts are interengaged and (c) that are in part substantially perpendicular to the closure member and in part inclined thereto, said surface portions on one part forming opposite sides of a projection in which the inclined surface portions narrow the projection at its extending end and on the other part forming opposite sides of a recess into which the projection is received and in which the inclined surface portions cause the recess to be wider at its opening, said integral surface portions extending, when the parts are secured to members, in all respects transversely of a line that lies along said first member and that is perpendicular to the axis of pivotal movement, said interengaged surface portions on the parts being readily separable when the second part is stationary relative to said pivot axis and the first part is moved in a predetermined path about said pivot axis, and being inseparable through mutual interference between said cooperable surface portions when the two parts are moved concurrently about separate pivot axes or when forces act to cock one part relative to the other.

Claim 7

A movement restraining device comprising first and second cooperable parts, each with a back face and a front face, the first part being securable against its back face to and adjacent the distal edge of a first closure member that is hinged about a pivot axis and the second part being securable against its back face to a second member relative to which said first member is pivotable, the parts being interengageable, with portions of the first part overlying portions of the second part, both parts having at least two integral surface portions (a) that are in part formed on projections that extend from opposed face portions, (b) that are spaced apart so that when the parts are secured to said members one said surface portion of each part is farther from said pivot axis than the other, and (c) that are closely adjacent, opposed to, and cooperable with said surface portions of the other part to form opposed pairs of surfaces when the parts are interengaged, said surface portions extending in all respects transversely of a line that lies along said first member and that is perpendicular to the axis of pivotal movement, at least one segment of each pair of opposed surfaces that is adjacent one face of said parts being substantially perpendicular to said line and another segment being significantly inclined thereto, said substantially perpendicular segment of one pair being located adjacent an opposite face from that to which the other pair is adjacent, and said inclined segment of each pair converging toward the other in a direction that increases the clearance between said pairs of surfaces when one part moves away from the other about said pivot axis, whereby said surface portions on the parts are readily separable when the second part is stationary relative to said pivot axis and the first part is moved in a predetermined path about said pivot axis, and are not separable due to mutual interference between said cooperable surface portions when the two parts are moved concurrently about separate pivot axes or when forces act to cock one part relative to the other.

Claim 8

A movement restraining device comprising first and second cooperable parts, each with a back face and a front face, the first part being securable against its back face to and adjacent the distal edge of a first closure member that is hinged about a pivot axis and the second part being securable against its back face to a second member relative to which said first member is pivotable, the parts being interengageable, with portions of the first part overlying portions of the second part, both parts having at least two integral surface portions (a) that are in part formed on projections that extend from opposed face portions, (b) that are spaced apart so that when the parts are secured to said members one said surface portion of each part is farther from said pivot axis than the other, and (c) that are closely adjacent, opposed to, and cooperable with said surface portions of the other part to form opposed pairs of surfaces when the parts are interengaged, said surface portions extending in all respects transversely of a line that lies along said first member and that is perpendicular to the axis of pivotal movement, at least one segment of each pair of opposed surfaces that is adjacent one face of said parts being substantially perpendicular to said line and another segment being significantly inclined thereto, said substantially perpendicular segment of one pair being located adjacent an opposite face from that to which the other pair is adjacent, and said inclined segment of each pair converging toward the other in a direction that increases the clearance between said pairs of surfaces when one part moves away from the other about said pivot axis, whereby said surface portions on the parts are readily separable when the second part is stationary relative to said pivot axis and the first part is moved in a predetermined path about said pivot axis, and are not separable due to mutual interference between said cooperable surface portions when the two parts are moved concurrently about separate pivot axes or when forces act to cock one part relative to the other.

Claim 9

A movement restraining device comprising first and second cooperable parts, each with a back face and a front face, the first part being securable against its back face to and adjacent the distal edge of a first closure member that is hinged about a pivot axis and the second part being securable against its back face to a second member relative to which said first member is pivotable, the parts being interengageable, with portions of the first part overlying portions of the second part, both parts having at least two integral surface portions (a) that are in part formed on projections that extend from opposed face portions, (b) that are spaced apart so that when the parts are secured to said members one said surface portion of each part is farther from said pivot axis than the other, and (c) that are closely adjacent, opposed to, and cooperable with said surface portions of the other part to form opposed pairs of surfaces when the parts are interengaged, said surface portions extending in all respects transversely of a line that lies along said first member and that is perpendicular to the axis of pivotal movement, at least one segment of each pair of opposed surfaces that is adjacent one face of said parts being substantially perpendicular to said line and another segment being significantly inclined thereto, said substantially perpendicular segment of one pair being located adjacent an opposite face from that to which the other pair is adjacent, and said inclined segment of each pair converging toward the other in a direction that increases the clearance between said pairs of surfaces when one part moves away from the other about said pivot axis, whereby said surface portions on the parts are readily separable when the second part is stationary relative to said pivot axis and the first part is moved in a predetermined path about said pivot axis, and are not separable due to mutual interference between said cooperable surface portions when the two parts are moved concurrently about separate pivot axes or when forces act to cock one part relative to the other, and additional surface portions on said projections of each part, transverse to said first-mentioned surface portions, which cooperate with the other part to restrain relative movement of the parts in the plane of said faces and which are in part perpendicular to the respective front face adjacent the juncture therewith and in part inclined adjacent the projecting end to reduce the cross-sectional area and provide a tapered lead-in surface.

Claim 10

A movement restraining device comprising first and second cooperable parts, each with a back face and a front face, the first part being securable against its back face to and adjacent the distal edge of a first closure member that is hinged about a pivot axis and the second part being securable against its back face to a second member relative to which said first member is pivotable, the parts being interengageable, with portions of the first part overlying portions of the second part, both parts having at least two integral surface portions (a) that are in part formed on projections that extend from opposed face portions, (b) that are spaced apart so that when the parts are secured to said members one said surface portion of each part is farther from said pivot axis than the other, and (c) that are closely adjacent, opposed to, and cooperable with said surface portions of the other part to form opposed pairs of surfaces when the parts are interengaged, said surface portions extending in all respects transversely of a line that lies along said first member and that is perpendicular to the axis of pivotal movement, at least one segment of each pair of opposed surfaces that is adjacent one face of said parts being substantially perpendicular to said line and another segment being significantly inclined thereto, said substantially perpendicular segment of one pair being located adjacent an opposite face from that to which the other pair is adjacent, and said inclined segment of each pair converging toward the other in a direction that increases the clearance between said pairs of surfaces when one part moves away from the other about said pivot axis, whereby said surface portions on the parts are readily separable when the second part is stationary relative to said pivot axis and the first part is moved in a predetermined path about said pivot axis, and are not separable due to mutual interference between said cooperable surface portions when the two parts are moved concurrently about separate pivot axes or when forces act to cock one part relative to the other, and additional surface portions on said projections of each part, transverse to said first-mentioned surface portions, which cooperate with the other part to restrain relative movement of the parts in the plane of said faces and which are in part perpendicular to the respective front face adjacent the juncture therewith and in part inclined adjacent the projecting end to reduce the cross-sectional area and provide a tapered lead-in surface.

Claim 11

A movement restraining device comprising first and second cooperable parts, each with a back face and a front face, the first part being securable against its back face to and adjacent the distal edge of a first closure member that is hinged about a pivot axis and the second part being securable against its back face to a second member relative to which said first member is pivotable, the parts being interengageable, with portions of the first part overlying portions of the second part, both parts having two regions of interengagement with the other that are spaced in a direction parallel to said pivot axis when the parts are secured to said members, each said region having at least two integral surface portions (a) that are in part formed on projections that extend from opposed face portions, (b) that are spaced apart so that when the parts are secured to said members one said surface portion of each part is farther from said pivot axis than the other, and (c) that are closely adjacent, opposed to, and cooperable with said surface portions of the other part to form opposed pairs of surfaces when the parts are interengaged, said surface portions extending in all respects transversely of a line that lies along said first member and that is perpendicular to the axis of pivotal movement, at least one segment of each pair of opposed surfaces that is adjacent one face of said parts being substantially perpendicular to said line and another segment being signifiCantly inclined thereto, said substantially perpendicular segment of one pair being located adjacent an opposite face from that to which the other pair is adjacent, and said inclined segment of each pair converging toward the other in a direction that increases the clearance between said pairs of surfaces when one part moves away from the other about said pivot axis, whereby said surface portions on the parts are readily separable when the second part is stationary relative to said pivot axis and the first part is moved in a predetermined path about said pivot axis, and are not separable due to mutual interference between said cooperable surface portions when the two parts are moved concurrently about separate pivot axes or when forces act to cock one part relative to the other, and additional surface portions on said projections of each part, transverse to said first-mentioned surface portions, which cooperate with the other part to restrain relative movement of the parts in the plane of said faces and which are in part perpendicular to the respective front face adjacent the juncture therewith and in part inclined adjacent the projecting end to reduce the cross-sectional area and provide a tapered lead-in surface.

Claim 12

A movement restraining device comprising first and second cooperable parts, each with a back face and a front face, the first part being securable against its back face to and adjacent the distal edge of a first closure member that is hinged about a pivot axis and the second part being securable against its back face to a second member relative to which said first member is pivotable, the parts being interengageable, with portions of the first part overlying portions of the second part, both parts having two regions of interengagement with the other that are spaced in a direction parallel to said pivot axis when the parts are secured to said members, each said region having at least two integral surface portions (a) that are in part formed on projections that extend from opposed face portions, (b) that are spaced apart so that when the parts are secured to said members one said surface portion of each part is farther from said pivot axis than the other, and (c) that are closely adjacent, opposed to, and cooperable with said surface portions of the other part to form opposed pairs of surfaces when the parts are interengaged, said surface portions extending in all respects transversely of a line that lies along said first member and that is perpendicular to the axis of pivotal movement, at least one segment of each pair of opposed surfaces that is adjacent one face of said parts being substantially perpendicular to said line and another segment being signifiCantly inclined thereto, said substantially perpendicular segment of one pair being located adjacent an opposite face from that to which the other pair is adjacent, and said inclined segment of each pair converging toward the other in a direction that increases the clearance between said pairs of surfaces when one part moves away from the other about said pivot axis, whereby said surface portions on the parts are readily separable when the second part is stationary relative to said pivot axis and the first part is moved in a predetermined path about said pivot axis, and are not separable due to mutual interference between said cooperable surface portions when the two parts are moved concurrently about separate pivot axes or when forces act to cock one part relative to the other, and additional surface portions on said projections of each part, transverse to said first-mentioned surface portions, which cooperate with the other part to restrain relative movement of the parts in the plane of said faces and which are in part perpendicular to the respective front face adjacent the juncture therewith and in part inclined adjacent the projecting end to reduce the cross-sectional area and provide a tapered lead-in surface.

Claim 13

A movement restraining device comprising first and second cooperable parts, the first part being securable to and adjacent the distal edge of a first member that is hinged about a pivot axis and the second part being securable to a second member relative to which said first member is pivotable, the parts being interengageable, each said part having two regions of interengagement with the other that are spaced in a direction parallel to said pivot axis when the parts are secured to said members, each said region having at least two integral surface portions (a) that are spaced apart in a direction so that one said surface portion of each region is farther from said pivot axis than the other, and (b) that are closely adjacent, opposed to, and cooperable with those surface portions of the other part when the elements are interengaged, said surface portions extending in all respects transversely of a line that lies along said first member and that is perpendicular to the axis of pivotal movement said interengaged surface portions on the parts being readily separable when the second part is stationary relative to said pivot axis and the first part is moved in a predetermined path about said pivot axis, and being inseparable through mutual interference between said cooperable surface portions when the two parts are moved concurrently about separate pivot axes or when forces act to cock one part relative to the other.

Claim 14

A movement restraining device comprising first and second cooperable parts, the first part being securable to and adjacent the distal edge of a first member that is hinged about a pivot axis and the second part being securable to a second member relative to which said first member is pivotable, the parts being interengageable, each said part having two regions of interengagement with the other that are spaced in a direction parallel to said pivot axis when the parts are secured to said members, each said region having at least two integral surface portions (a) that are spaced apart in a direction so that one said surface portion of each region is farther from said pivot axis than the other, and (b) that are closely adjacent, opposed to, and cooperable with those surface portions of the other part when the elements are interengaged, said surface portions extending in all respects transversely of a line that lies along said first member and that is perpendicular to the axis of pivotal movement said interengaged surface portions on the parts being readily separable when the second part is stationary relative to said pivot axis and the first part is moved in a predetermined path about said pivot axis, and being inseparable through mutual interference between said cooperable surface portions when the two parts are moved concurrently about separate pivot axes or when forces act to cock one part relative to the other.

Claim 15

A movement restraining device comprising first and second cooperable parts, each with a back face and a front face, the first part being securable against its back face to and adjacent the distal edge of a first closure member that is hinged about a pivot axis and the second part being securable against its back face to a second closure member relative to which said first member is pivotable, the parts being interengageable, each said part having two regions of interengagement with the other that are spaced in a direction parallel to said pivot axis when the parts are secured to said members, each said region having at least two integral surface portions that (a) are spaced apart in a direction so that one said surface portion of each region is farther from said pivot axis than the other, and (b) that are closely adjacent and cooperable with those surface portions of the other part to form opposed pairs of surfaces when the parts are interengaged, said surface portions extending in all respects transversely of a line that lies along said members and is perpendicular to the axes of pivotal movement and one segment of each pair of opposed surfaces that is adjacent one face of said parts being substantially perpendicular to said line and another segment being significantly inclined thereto, said substantially perpendicular segment of one pair being located adjacent an opposite face from that to which the other pair is adjacent, and said inclined segment of each pair converging toward the other in a direction that increases the clearance between said pairs of surfaces when one part moves away from the other about its respective pivot axis, whereby said surface portions on the parts are readily separable when the second part is stationary relative to its pivot axis and the first part is moved in a predetermined path about its pivot axis, and are not separable due to mutual interference between said cooperable surface portions when the two parts are moved concurrently about separate pivot axes or when forces act to cock one part relative to the other.

Claim 16

A movement restraining device comprising first and second cooperable parts, each with a back face and a front face, the first part being securable against its back face to and adjacent the distal edge of a first closure member that is hinged about a pivot axis and the second part being securable against its back face to a second closure member relative to which said first member is pivotable, the parts being interengageable, each said part having two regions of interengagement with the other that are spaced in a direction parallel to said pivot axis when the parts are secured to said members, each said region having at least two integral surface portions that (a) are spaced apart in a direction so that one said surface portion of each region is farther from said pivot axis than the other, and (b) that are closely adjacent and cooperable with those surface portions of the other part to form opposed pairs of surfaces when the parts are interengaged, said surface portions extending in all respects transversely of a line that lies along said members and is perpendicular to the axes of pivotal movement and one segment of each pair of opposed surfaces that is adjacent one face of said parts being substantially perpendicular to said line and another segment being significantly inclined thereto, said substantially perpendicular segment of one pair being located adjacent an opposite face from that to which the other pair is adjacent, and said inclined segment of each pair converging toward the other in a direction that increases the clearance between said pairs of surfaces when one part moves away from the other about its respective pivot axis, whereby said surface portions on the parts are readily separable when the second part is stationary relative to its pivot axis and the first part is moved in a predetermined path about its pivot axis, and are not separable due to mutual interference between said cooperable surface portions when the two parts are moved concurrently about separate pivot axes or when forces act to cock one part relative to the other.

Claim 17

In a restraining device for a pivoted closure member: a first member having parallel oppositely facing surfaces and being adapted to be fixedly connected to and adjacent the distal edge of a closure member hinged for movement in a predetermined path with said surfaces offset with respect to one another and from and parallel with the pivotal axis of the closure member and said surfaces being at one side of and normal to a plane in which said axis lies and offset with respect to one another transversely of said plane; and a second member having parallel oppositely facing surfaces adjacent to said parallel surfaces of said first member with a small clearance therebetween when said second member is fixedly secured to a third member at the distal edge of the closure member with the closure member in closed position; at least two of said parallel surfaces being adapted to engage one another and prevent opening of the closure member when distorted from its predetermined path.

Claim 18

In a restraining device for a pivoted closure member: a first member having parallel oppositely facing surfaces and being adapted to be fixedly connected to and adjacent the distal edge of a closure member hinged for movement in a predetermined path with said surfaces offset with respect to one another and from and parallel with the pivotal axis of the closure member and said surfaces being at one side of and normal to a plane in which said axis lies and offset with respect to one another transversely of said plane; and a second member having parallel oppositely facing surfaces adjacent to said parallel surfaces of said first member with a small clearance therebetween when said second member is fixedly secured to a third member at the distal edge of the closure member with the closure member in closed position; at least two of said parallel surfaces being adapted to engage one another and prevent opening of the closure member when distorted from its predetermined path.

Claim 19

In combination, a generally planar closure member supported for pivotable movement about an axis, a second member relative to which said closure member pivots and directly adjacent to which a distal end of said closure member is located in one pivoted position, and first and second cooperable parts, the first rigidly secured to said closure member adjacent the distal end thereof and the second to said second member at a position directly adjacent to the first member when the closure member is in said one pivoted position, each part having two fixed surface portions (a) that are transverse to the plane of the closure member and to a line perpendicular to said pivot axis, (b) that are spaced from each other in a direction transversely of said pivot axis so one is farther from the pivot axis than the other, and (c) that are located to be directly adjacent and opposed to said two surface portions of the other part and to cooperate therewith when the closure member is in said one position, said fixed surface portions being readily separable when the second member is stationary relative to said pivot axis and the closure member is moved in a predetermined path about said pivot axis, and being inseparable due to mutual interference between said cooperable surface portions when the two members are moved concurrently about separate pivot axes or when forces act to distort one or both of said members and cock one part relative to the other.

Claim 20

In combination, a generally planar closure member supported for pivotable movement about an axis, a second member relative to which said closure member pivots and directly adjacent to which a distal end of said closure member is located in one pivoted position, and first and second cooperable parts, the first rigidly secured to said closure member adjacent the distal end thereof and the second to said second member at a position directly adjacent to the first member when the closure member is in said one pivoted position, each part having two fixed surface portions (a) that are transverse to the plane of the closure member and to a line perpendicular to said pivot axis, (b) that are spaced from each other in a direction transversely of said pivot axis so one is farther from the pivot axis than the other, and (c) that are located to be directly adjacent and opposed to said two surface portions of the other part and to cooperate therewith when the closure member is in said one position, said fixed surface portions being readily separable when the second member is stationary relative to said pivot axis and the closure member is moved in a predetermined path about said pivot axis, and being inseparable due to mutual interference between said cooperable surface portions when the two members are moved concurrently about separate pivot axes or when forces act to distort one or both of said members and cock one part relative to the other.

Claim 21

In combination, first and second doors supported for pivotable movement about parallel axes and arranged so their distal ends are directly adjacent when the doors lie in a common plane, and first and second cooperable members, the first secured to said first door adjacent and extending beyond the distal end thereof and the second secured to said second door adjacent the distal end and at a position directly opposite the first member when the doors are in a common plane, whereby the first member overlies the second, each member having two fixed surface portions, transverse to the plane of the respective door and to a line perpendicular to said door pivot axis, said surface portions of each member being in a direction transversely of the pivot axis of the respective door so one surface is farther from the pivot axis than the other, the two surface portions oF each member being located to be directly adjacent and opposed to the two surface portions of the other member and to cooperate therewith when the doors are in a common plane, said fixed surface portions being readily separable when the two doors are initially in a common plane, the second door is maintained stationary relative to the first, and the first door is moved in a predetermined path about its pivot axis, and being inseparable due to mutual interference between said cooperable surface portions when the two doors are concurrently moved from their common plane about their pivot axes or when forces act to distort one or both doors and cock one member relative to the other.

Claim 22

In combination, first and second doors supported for pivotable movement about parallel axes and arranged so their distal ends are directly adjacent when the doors lie in a common plane, and first and second cooperable members, the first secured to said first door adjacent and extending beyond the distal end thereof and the second secured to said second door adjacent the distal end and at a position directly opposite the first member when the doors are in a common plane, whereby the first member overlies the second, each member having two fixed surface portions, transverse to the plane of the respective door and to a line perpendicular to said door pivot axis, said surface portions of each member being in a direction transversely of the pivot axis of the respective door so one surface is farther from the pivot axis than the other, the two surface portions oF each member being located to be directly adjacent and opposed to the two surface portions of the other member and to cooperate therewith when the doors are in a common plane, said fixed surface portions being readily separable when the two doors are initially in a common plane, the second door is maintained stationary relative to the first, and the first door is moved in a predetermined path about its pivot axis, and being inseparable due to mutual interference between said cooperable surface portions when the two doors are concurrently moved from their common plane about their pivot axes or when forces act to distort one or both doors and cock one member relative to the other.

Claim 23

In combination, first and second doors supported for pivotable movement about parallel axes and arranged so their distal ends are directly adjacent when the doors lie in a common plane, and first and second cooperable members, the first secured to said first door adjacent and extending beyond the distal end thereof and the second secured to said second door adjacent the distal end and at a position directly opposite the first member when the doors are in a common plane, whereby the first member overlies the second, each member having two fixed surface portions, transverse to the plane of the respective door and to a line perpendicular to said door pivot axis, said surface portions of each member being in a direction transversely of the pivot axis of the respective door so one surface is farther from the pivot axis than the other, the two surface portions of each member being located to be directly adjacent and opposed to the two surface portions of the other member and to cooperate therewith when the doors are in a common plane, said fixed surface portions on each member extending in part substantially perpendicularly to the plane of the associated door and in part converging in a direction that will increase the clearance between said surfaces of one member relative to those of the other when the members are separated through pivoting of the first door relative to the second, said surface portions being readily separable when the two doors are initially in a common plane, the second door is maintained stationary relative to the first, and the first door is moved in a predetermined path about its pivot axis, and being inseparable due to mutual interference between said cooperable surface portions when the two doors are concurrently moved from their common plane about their pivot axes or when forces act to distort one or both doors and cock one member relative to the other.

Claim 24

In combination, first and second doors supported for pivotable movement about parallel axes and arranged so their distal ends are directly adjacent when the doors lie in a common plane, and first and second cooperable members, the first secured to said first door adjacent and extending beyond the distal end thereof and the second secured to said second door adjacent the distal end and at a position directly opposite the first member when the doors are in a common plane, whereby the first member overlies the second, each member having two fixed surface portions, transverse to the plane of the respective door and to a line perpendicular to said door pivot axis, said surface portions of each member being in a direction transversely of the pivot axis of the respective door so one surface is farther from the pivot axis than the other, the two surface portions of each member being located to be directly adjacent and opposed to the two surface portions of the other member and to cooperate therewith when the doors are in a common plane, said fixed surface portions on each member extending in part substantially perpendicularly to the plane of the associated door and in part converging in a direction that will increase the clearance between said surfaces of one member relative to those of the other when the members are separated through pivoting of the first door relative to the second, said surface portions being readily separable when the two doors are initially in a common plane, the second door is maintained stationary relative to the first, and the first door is moved in a predetermined path about its pivot axis, and being inseparable due to mutual interference between said cooperable surface portions when the two doors are concurrently moved from their common plane about their pivot axes or when forces act to distort one or both doors and cock one member relative to the other.

Claim 25

In combination, a door supported for pivotable movement about an axis between open and closed positions, a member relative to which said door pivots and directly adjacent to which a distal end of said door is located when the door is in a closed position, and first and second cooperable parts, the first secured adjacent the distal end of the door to a surface of the door that faces in the direction in which the door pivots to an open position and the second secured to said member at a position directly adjacent to the first part when the door is in the closed position, the pivot axis being spaced from said surface of the door in the direction in which the door opens a distance approximately as great as that to which said parts extend from the plane of said surface of the door, whereby said parts are essentially between said door surface and a plane parallel thereto through the pivot axis, each part having two fixed surface portions transverse to the plane of the door and to a line perpendicular to said pivot axis, spaced from each other in a direction transversely of said pivot axis, and located to be directly adjacent those surface portions of the other part and cooperable therewith, said fixed surface portions being readily separable when said member is stationary relative to the pivot axis of the door and the door is moved from a closed position in a predetermined path about said axis, and being inseparable due to mutual interference between said cooperable surface portions when the door and member are moved about separate pivot axes or when forces act to distort the door or member and cock one part relative to the other.

Claim 26

In combination, a door supported for pivotable movement about an axis between open and closed positions, a member relative to which said door pivots and directly adjacent to which a distal end of said door is located when the door is in a closed position, and first and second cooperable parts, the first secured adjacent the distal end of the door to a surface of the door that faces in the direction in which the door pivots to an open position and the second secured to said member at a position directly adjacent to the first part when the door is in the closed position, the pivot axis being spaced from said surface of the door in the direction in which the door opens a distance approximately as great as that to which said parts extend from the plane of said surface of the door, whereby said parts are essentially between said door surface and a plane parallel thereto through the pivot axis, each part having two fixed surface portions transverse to the plane of the door and to a line perpendicular to said pivot axis, spaced from each other in a direction transversely of said pivot axis, and located to be directly adjacent those surface portions of the other part and cooperable therewith, said fixed surface portions being readily separable when said member is stationary relative to the pivot axis of the door and the door is moved from a closed position in a predetermined path about said axis, and being inseparable due to mutual interference between said cooperable surface portions when the door and member are moved about separate pivot axes or when forces act to distort the door or member and cock one part relative to the other.