Drawbolt latching device

Claim 2

A drawbolt latching device adapted to be mounted on coplanar mounting surfaces of separable parts of a container adjacent a line of separation therebetween, comprising a keeper to be affixed to one of the mounting surfaces having a first mating portion, a drawbolt assembly including a mounting plate to be affixed to the other of said mounting surfaces, a drawbolt body pivotally supported on said mounting plate for arcuate movement about a first pivot axis paralleling said surface between a latching position against said plate and a release position inclined outwardly therefrom, a generally U-shaped shackle including a croSs-member having a second mating portion and a pair of legs pivoted to said drawbolt body remote from said cross-member for arcuate movement between a latching position and a release position about a second pivot axis spaced eccentrically relative to said first pivot axis to interfit said second and first mating portions together and draw said keeper and its associated container part to closed position upon arcuate movement of the drawbolt body about said first pivot axis from said release position to said latching position, said second pivot axis when said drawbolt body occupies said latching position being located outwardly relative to said mounting surfaces from a reference plane passing through said first pivot axis and said first mating portion and said second pivot axis remaining continuously outwardly of said reference plane throughout movement of the drawbolt body between latching and release positions, said mounting plate including a first retaining member, said drawbolt body having a guideway and a finger operable slide member movable therein biased to a hold position, the slide member having a second retaining member releasibly coupled with the first retaining member when the slide member occupies said hold position to restrain the drawbolt body against said plate and to release the drawbolt body for outward pivotal movement upon manual actuation of the slide member.

Claim 3

A drawbolt latching device as defined in claim 1, wherein said shackle includes trunions projecting inwardly from said legs toward the drawbolt body and journaled in the latter, said trunions each having a flat formed at a selected angular position thereon, and said drawbolt body including resilient members bearing against said trunions at positions to engage said flats when the shackle occupies said latching position and to be increasingly stressed by other portions of the trunions as the shackle is displaced angularly relative to the drawbolt body upon arcuate movement of the latter from its latching position to resiliently retain the shackle at such angularly displaced positions relative to the drawbolt body.

Claim 4

A drawbolt latching device adapted to be mounted on coplanar mounting surfaces of separable parts of a container adjacent a line of separation therebetween, comprising a keeper to be affixed to one of the mounting surfaces having a first mating portion, a drawbolt assembly including a mounting plate to be affixed to the other of said mounting surfaces, a drawbolt body pivotally supported on said mounting plate for arcuate movement about a first pivot axis paralleling said surface between a latching position against said plate and a release position inclined outwardly therefrom, a generally U-shaped shackle including a cross-member having a second mating portion and a pair of legs pivoted to said drawbolt body remote from said cross-member for arcuate movement between a latching position and a release position about a second pivot axis spaced eccentrically relative to said first pivot axis to interfit said second and first mating portions together and draw said keeper and its associated container part to closed position upon arcuate movement of the drawbolt body about said first pivot axis from said release position to said latching position, said second pivot axis when said drawbolt body occupies said latching position being located outwardly relative to said mounting surfaces from a reference plane passing though said first pivot axis and said first mating portion and said second pivot axis remaining continuously outwardly of said reference plane throughout movement of the drawbolt body between latching and release positions, said mounting plate including a retaining staple projecting outwardly therefrom, said drawbolt body having a guideway and a finger operable slide member movable therein biased to a hold position, the slide member having a retaining tongue formation interfitted in said staple when the slide member occupies said hold position to restrain the drawbolt body against said plaTe and to release the drawbolt body for outward pivotal movement upon manual actuation of the slide member.

Claim 5

A drawbolt latching device adapted to be mounted on coplanar mounting surfaces of separable parts of a container adjacent a line of separation therebetween, comprising a keeper to be affixed to one of the mounting surfaces having a first mating portion, a drawbolt assembly including a mounting plate to be affixed to the other of said mounting surfaces, a drawbolt body pivotally supported on said mounting plate for arcuate movement about a first pivot axis paralleling said surface between a latching position against said plate and a release position inclined outwardly therefrom, a generally U-shaped shackle including a cross-member having a second mating portion and a pair of legs pivoted to said drawbolt body remote from said cross-member for arcuate movement between a latching position and a release position about a second pivot axis spaced eccentrically relative to said first pivot axis to interfit said second and first mating portions together and draw said keeper and its associated container part to closed position upon arcuate movement of the drawbolt body about said first pivot axis from said release position to said latching position, said second pivot axis when said drawbolt body occupies said latching position being located outwardly relative to said mounting surfaces from a reference plane passing though said first pivot axis and said first mating portion and said second pivot axis remaining continuously outwardly of said reference plane throughout movement of the drawbolt body between latching and release positions, said mounting plate including a retaining staple projecting outwardly therefrom, said drawbolt body having a guideway and a finger operable slide member movable therein biased to a hold position, the slide member having a retaining tongue formation interfitted in said staple when the slide member occupies said hold position to restrain the drawbolt body against said plaTe and to release the drawbolt body for outward pivotal movement upon manual actuation of the slide member.

Claim 6

A drawbolt latching device as defined in claim 3, wherein said shackle includes trunions projecting inwardly from said legs toward the drawbolt body and journaled in the latter, said trunions each having a flat formed at a selected angular position thereon, and said drawbolt body including resilient members bearing against said trunions at positions to engage said flats when the shackle occupies said latching position and to be increasingly stressed by other portions of the trunions as the shackle is displaced angularly relative to the drawbolt body upon arcuate movement of the latter from its latching position to resiliently retain the shackle at such angularly displaced positions relative to the drawbolt body.

Claim 7

A drawbolt latching device as defined in claim 4, including a kicker spring on said mounting plate having an outwardly extending spring portion engaging said tongue formation during release movement of said slide member to resiliently move the tongue formation outwardly beyond an interfitting position relative to the staple immediately upon release of the tongue formation from said staple.

Claim 8

A drawbolt latching device as defined in claim 5, including a spring member adjacent said first pivot axis for continuously biasing said drawbolt body toward said mounting plate to resiliently swing the drawbolt body to a location near said latching position when manual tilting pressure is withdrawn from the drawbolt body.

Claim 9

A drawbolt latching device as defined in claim 3, including a kicker spring on said mounting plate having an outwardly extending spring portion engaging said tongue formation during release movement of said slide member to resiliently move the tongue formation outwardly beyond an interfitting position relative to the staple immediately upon release of the tongue formation from said staple.

Claim 10

A drawbolt latching device as defined in claim 3, including a spring member adjacent said first pivot axis for continuously biasing said drawbolt body toward said mounting plate to resiliently swing the drawbolt body to a location near said latching position when manual tilting pressure is withdrawn from the drawbolt body.

Claim 11

A drawbolt latching device adapted to be mounted on coplanar mounting surfaces of separable parts of a container adjacent a line of separation therebetween, comprising a keeper to be affixed to one of the mounting surfaces having a first mating portion, a drawbolt assembly including a mounting plate to be affixed to the other of said mounting surfaces, a drawbolt body pivotally supported on said mounting plate for arcuate movement about a first pivot axis paralleling said surface between a latching position against said plate and a release position inclined outwardly therefrom, a generally U-shaped shackle including a cross-member having a second mating portion and a pair of legs pivoted to said drawbolt body remote from said cross-member for arcuate movement between a latching position and a release position about a second pivot axis spaced eccentrically relative to said first pivot axis to interfit said second and first mating portions together and draw said keeper and its associated container part to closed position upon arcuate movement of the drawbolt body about said first pivot axis from said release position to said latching position, said second pivot axis when said drawbolt body occupies said latching position being located outwardly relative to said mounting surfaces from a reference plane passing through said first pivot axis and said first mating portion and said second pivot axis remaining continuously outwardly of said reference plane throughout movement of the drawbolt body between latching and release positions, said shackle including trunions projecting inwardly from said legs toward the drawbolt body and journaled in the latter, said trunions each having a flat formed at a selected angular position thereon, and Said drawbolt body including resilient members bearing against said trunions at positions to engage said flats when the shackle occupies said latching position and to be increasingly stressed by other portions of the trunions as the shackle is displace angularly relative to the drawbolt body upon arcuate movement of the latter from its latching position to resiliently retain the shackle at such angularly displaced positions relative to the drawbolt body.

Claim 12

A drawbolt latching device adapted to be mounted on coplanar mounting surfaces of separable parts of a container adjacent a line of separation therebetween, comprising a keeper to be affixed to one of the mounting surfaces having a first mating portion, a drawbolt assembly including a mounting plate to be affixed to the other of said mounting surfaces, a drawbolt body pivotally supported on said mounting plate for arcuate movement about a first pivot axis paralleling said surface between a latching position against said plate and a release position inclined outwardly therefrom, a generally U-shaped shackle including a cross-member having a second mating portion and a pair of legs pivoted to said drawbolt body remote from said cross-member for arcuate movement between a latching position and a release position about a second pivot axis spaced eccentrically relative to said first pivot axis to interfit said second and first mating portions together and draw said keeper and its associated container part to closed position upon arcuate movement of the drawbolt body about said first pivot axis from said release position to said latching position, said second pivot axis when said drawbolt body occupies said latching position being located outwardly relative to said mounting surfaces from a reference plane passing through said first pivot axis and said first mating portion and said second pivot axis remaining continuously outwardly of said reference plane throughout movement of the drawbolt body between latching and release positions, said shackle including trunions projecting inwardly from said legs toward the drawbolt body and journaled in the latter, said trunions each having a flat formed at a selected angular position thereon, and Said drawbolt body including resilient members bearing against said trunions at positions to engage said flats when the shackle occupies said latching position and to be increasingly stressed by other portions of the trunions as the shackle is displace angularly relative to the drawbolt body upon arcuate movement of the latter from its latching position to resiliently retain the shackle at such angularly displaced positions relative to the drawbolt body.

Claim 13

A drawbolt latching device as defined in claim 9, including a spring member adjacent said first pivot axis for continuously biasing said drawbolt body toward said mounting plate to resiliently swing the drawbolt body to a location near said latching position when manual tilting pressure is withdrawn from the drawbolt body.

Claim 14

A drawbolt latching device adapted to be mounted on coplanar mounting surfaces of separable parts of a container adjacent a line of separation therebetween, comprising a keeper to be affixed to one of the mounting surfaces having a first mating portion, a drawbolt assembly including a mounting plate to be affixed to the other of said mounting surfaces, a drawbolt body pivotally supported on said mounting plate for arcuate movement about a first pivot axis paralleling said surface between a latching position against said plate and a release position inclined outwardly therefrom, a generally U-shaped shackle including a cross-member having a second mating portion and a pair of legs pivoted to said drawbolt body remote from said cross-member for arcuate movement between a latching position and a release position about a second pivot axis spaced eccentrically relative to said first pivot axis to interfit said second and first mating portions together and draw said keeper and its associated container part to closed position upon arcuate movement of the drawbolt body about said first pivot axis from said release position to said latching position, said second pivot axis when said drawbolt body occupies said latching position being located outwardly relative to said mounting surfaces from a reference plane passing through said first pivot axis and said first mating portion and said second pivot axis remaining continuously outwardly of said reference plane throughout movement of the drawbolt body between latching and release positions, and a spring member adjacent said first pivot axis for continuously biasing said drawbolt body toward said mounting plate to resiliently swing the drawbolt body to a location near said latching position when manual tilting pressure is withdrawn from the drawbolt body.

Claim 15

A drawbolt latching device adapted to be mounted on coplanar mounting surfaces of separable parts of a container adjacent a line of separation therebetween, comprising a keeper to be affixed to one of the mounting surfaces having a first mating portion, a drawbolt assembly including a mounting plate to be affixed to the other of said mounting surfaces, a drawbolt body pivotally supported on said mounting plate for arcuate movement about a first pivot axis paralleling said surface between a latching position against said plate and a release position inclined outwardly therefrom, a generally U-shaped shackle including a cross-member having a second mating portion and a pair of legs pivoted to said drawbolt body remote from said cross-member for arcuate movement between a latching position and a release position about a second pivot axis spaced eccentrically relative to said first pivot axis to interfit said second and first mating portions together and draw said keeper and its associated container part to closed position upon arcuate movement of the drawbolt body about said first pivot axis from said release position to said latching position, said second pivot axis when said drawbolt body occupies said latching position being located outwardly relative to said mounting surfaces from a reference plane passing through said first pivot axis and said first mating portion and said second pivot axis remaining continuously outwardly of said reference plane throughout movement of the drawbolt body between latching and release positions, and a spring member adjacent said first pivot axis for continuously biasing said drawbolt body toward said mounting plate to resiliently swing the drawbolt body to a location near said latching position when manual tilting pressure is withdrawn from the drawbolt body.

Claim 16

A drawbolt latching device adapted to be mounted on coplanar mounting surfaces of separable parts of a container adjacent a line of separation therebetween, comprising a keeper to be affixed to one of the mounting surfaces including a lip projecting in outwardly spaced relation therefrom away from said line, a drawbolt assembly including a mounting plate to be affixed to the other of said mounting surfaces having a retaining staple projecting outwardly therefrom, a drawbolt body member pivotally supported on said mounting plate for arcuate movement about a first pivot axis paralleling said surface between a latching position against said plate and a release position inclined outwardly therefrom, a rectilinearly reciprocative slide member supported in said drawbolt body for finger displacement from a normal position wherein a portion of the slide member is releasibly interfitted with the staple for holding the body in said latching position, a generally U-shaped shackle including a cross-member having a recess therein and a pair of legs pivoted to said drawbolt body remote from said cross-member for arcuate movement about a second pivot axis between a coplanar position and an outwardly inclined position relative to the drawbolt body to interfit said recess and said lip and draw said keeper and its associated container part to closed position upon arcuate movement of the body member about said first pivOt axis from said release position to said latching position, said second pivot axis when said drawbolt body member occupies said latching position being located outwardly relative to said mounting surfaces from a reference plane passing through said first pivot axis and said lip and said second pivot axis remaining continuously outwardly of said reference plane throughout movement of the drawbolt body between latching and release positions.

Claim 17

A drawbolt latching device adapted to be mounted on coplanar mounting surfaces of separable parts of a container adjacent a line of separation therebetween, comprising a keeper to be affixed to one of the mounting surfaces including a lip projecting in outwardly spaced relation therefrom away from said line, a drawbolt assembly including a mounting plate to be affixed to the other of said mounting surfaces having a retaining staple projecting outwardly therefrom, a drawbolt body member pivotally supported on said mounting plate for arcuate movement about a first pivot axis paralleling said surface between a latching position against said plate and a release position inclined outwardly therefrom, a rectilinearly reciprocative slide member supported in said drawbolt body for finger displacement from a normal position wherein a portion of the slide member is releasibly interfitted with the staple for holding the body in said latching position, a generally U-shaped shackle including a cross-member having a recess therein and a pair of legs pivoted to said drawbolt body remote from said cross-member for arcuate movement about a second pivot axis between a coplanar position and an outwardly inclined position relative to the drawbolt body to interfit said recess and said lip and draw said keeper and its associated container part to closed position upon arcuate movement of the body member about said first pivOt axis from said release position to said latching position, said second pivot axis when said drawbolt body member occupies said latching position being located outwardly relative to said mounting surfaces from a reference plane passing through said first pivot axis and said lip and said second pivot axis remaining continuously outwardly of said reference plane throughout movement of the drawbolt body between latching and release positions.

Claim 18

A drawbolt latching device as defined in claim 12, said drawbolt body having a guideway and a finger operable slide member moveable therein biased to a hold position, the slide member having a retaining tongue formation interfitted in said staple when the slide member occupies said hold position to restrain the drawbolt body against said plate and to release the drawbolt body for outward pivotal movement upon manual actuation of the slide member.

Claim 19

A drawbolt latching device as defined in claim 12, wherein said shackle includes trunions projecting inwardly from said legs toward the drawbolt body and journaled in the latter, said trunions each having a flat formed at a selected angular position thereon, and said drawbolt body including resilient members bearing against said trunions at positions to engage said flats when the shackle occupies said latching position and to be increasingly stressed by other portions of the trunions as the shackle is displaced angularly relative to the drawbolt body upon arcuate movement of the latter from its latching position to resiliently retain the shackle at such angularly displaced positions relative to the drawbolt body.

Claim 20

A drawbolt latching device as defined in claim 12, including a kicker spring on said mounting plate having an outwardly extending spring portion engaging said tongue formation during release movement of said slide member to resiliently move the tongue formation outwardly beyond an interfitting position relative to the staple immediately upon release of the tongue formation from said staple.

Claim 21

A drawbolt latching device as defined in claim 12, including a spring member adjacent said first pivot axis for continuously biasing said drawbolt body toward said mounting plate to resiliently swing the drawbolt body to a location near said latching position when manual tilting pressure is withdrawn from the drawbolt body.