Butt hinge

Claim 2

A butt hinge having a hinge axis and comprising a first hinge plate and a pair of axially spaced outer gudgeons extending outwardly from an edge of said first hinge plate extending generally parallel to and spaced laterally from the hinge axis, a second hinge plate and a single inner gudgeon extending outwardly from an edge of said second hinge plate extending generally parallel to and spaced laterally from the hinge axis with said inner gudgeon extending between and axially aligned with said outer gudgeons of said first hinge plate, said inner gudgeon of said second hinge plate being formed by two axially spaced inner gudgeon sections and with the adjacent ends of said inner gudgeon sections in combination with said edge from which said inner gudgeon sections extend defining a recess, said recess and said first plate edge being so dimensioned that when a a hinge pin extends through said pair of outer gudgeons of said first plate said two inner gudgeon sections of said second plate and said recess between said inner gudgeon sections for pivotally connecting said first and second hinge plates to provide the hinge axis only said hinge pin extends through said recess with said first plate edge being outside thereof, said pin being fixed against rotation with said outer gudgeons of said first plate, a bearing bushing within each of said inner gudgeon sections of said second plate for supporting said pin for rotational movement about its axis when said first plate is pivotally moved relative to said second plate about the hinge axis, said bearing bushings each projecting into said recess and located in spaced relation to one another in the axial direction of said hinge axis and said recess between said inner gudgeon sections extends for about one-third of the overall axial length of said inner gudgeon on said second hinge plate.

Claim 3

A butt hinge according to claim 1, wherein each of said bushings has a collar at one of its ends and said inner gudgeon sections have outer bearing surfaces which face toward said outer gudgeons of said first plate, said collars of said bushings project from and extend over said outer bearing surfaces.

Claim 4

A butt hinge according to claim 2, wherein said bushings each have a free cylindrical end which projects toward the other into said recess for a given distance beyond the length of said inner gudgeon sections along said hinge axis.

Claim 5

A butt hinge according to claim 2, wherein said bushings are formed of a plastics material.

Claim 6

A butt hinge according to claim 2, wherein said bushings are formed of load bearing bronze.

Claim 7

A butt hinge according to claim 2, wherein said bushings are formed of a textile fabric having a coating of Teflon.

Claim 8

A butt hinge according to claim 4, wherein said plastics material comprises polyamide.

Claim 9

A butt hinge according to claim 4, wherein said plastics material comprises Teflon.

Claim 10

A butt hinge having a hinge axis and comprising a first hinge plate having a first edge extending generally parallel with said hinge axis and a pair of second edges spaced apart along the hinge axis at the opposite ends of said first edge, an outer gudgeon located at each of said second edges with said outer gudgeons centered on said hinge axis, a second hinge plate having a third edge extending generally parallel with said hinge axis and a pair of fourth edges spaced apart along said hinge axis and located at the opposite ends of said third edge, an inner gudgeon formed along said third edge and centered on said hinge axis, said third edge has a length at least slightly less than the spacing between said outer gudgeons so that said third edge fits and extends between said outer gudgeons, said inner gudgeon is located between said outer gudgeons and has a length along said hinge axis approximately equal to the length of said third edge, said inner gudgeon comprising two inner gudgeon sections spaced apart in the axial direction of said hinge axis with each said inner gudgeon section extending from different one of said fourth edges toward the other said inner gudgeon section, the adjacent ends of said inner gudgeon sections are spaced apart and form an open recess therebetween so that the formation of condensation water within said butt hinge is avoided, a hinge pin extending continuously between said pair of outer gudgeons of said first plate and extending through said inner gudgeon sections of said second plate for pivotally connecting said first and second hinge plates and forming said hinge axis, said pin is fixed against rotation in at least one of said outer gudgeons of said first plate, a bearing bushing within each of said inner gudgeon sections of said second plate for supporting said pin for rotational movement about its axis when said first plate is moved pivotally relative to said second plate, said first edge of said first hinge plate is spaced radially outwardly from said hinge pin and said third edge of said second hinge plate between said inner gudgeon sections is spaced radially outwardly relative to the hinge axis from the axial extending outer surfaces of said inner gudeon sections.

Claim 11

A butt hinge having a hinge axis and comprising a first hinge plate having a first edge extending generally parallel with said hinge axis and a pair of second edges spaced apart along the hinge axis at the opposite ends of said first edge, an outer gudgeon located at each of said second edges with said outer gudgeons centered on said hinge axis, a second hinge plate having a third edge extending generally parallel with said hinge axis and a pair of fourth edges spaced apart along said hinge axis and located at the opposite ends of said third edge, an inner gudgeon formed along said third edge and centered on said hinge axis, said third edge has a length at least slightly less than the spacing between said outer gudgeons so that said third edge fits and extends between said outer gudgeons, said inner gudgeon is located between said outer gudgeons and has a length along said hinge axis approximately equal to the length of said third edge, said inner gudgeon comprising two inner gudgeon sections spaced apart in the axial direction of said hinge axis with each said inner gudgeon section extending from different one of said fourth edges toward the other said inner gudgeon section, the adjacent ends of said inner gudgeon sections are spaced apart and form an open recess therebetween so that the formation of condensation water within said butt hinge is avoided, a hinge pin extending continuously between said pair of outer gudgeons of said first plate and extending through said inner gudgeon sections of said second plate for pivotally connecting said first and second hinge plates and forming said hinge axis, said pin is fixed against rotation in at least one of said outer gudgeons of said first plate, a bearing bushing within each of said inner gudgeon sections of said second plate for supporting said pin for rotational movement about its axis when said first plate is moved pivotally relative to said second plate, said first edge of said first hinge plate is spaced radially outwardly from said hinge pin and said third edge of said second hinge plate between said inner gudgeon sections is spaced radially outwardly relative to the hinge axis from the axial extending outer surfaces of said inner gudeon sections.

Claim 12

A butt hinge, according to claim 9, wherein said open recess between said inner gudgeon sections extends about one-third the overall axial length between said fourth edges of said second hinge plate.

Claim 13

A butt hinge according to claim 10, wherein each of said bushings has a collar at one of its ends and said inner gudgeon sections have outer bearing surfaces which face toward said outer gudgeons on said first plate, and said collars of said bushing extend over said outer bearing surfaces.

Claim 14

A butt hinge according to claim 11, wherein said bushings are formed of load bearing bronze.

Claim 15

A butt hinge according to claim 11, wherein said bushings are formed of textile fabric having a coating of Teflon.

Claim 16

A butt hinge according to claim 11, wherein said bushings have free cylindrical ends which project toward one another a given distance beyond the length of said inner gudgeon sections along said hinge axis.

Claim 17

A butt hinge according to claim 14, wherein said bushings are formed of a plastics material.

Claim 18

A butt hinge according to claim 15, wherein said plastics material comprises polyamide.

Claim 19

A butt hinge according to claim 15, wherein said plastics material comprises Teflon.