Self-latching hinge

Claim 3

A device according to claim 1 wherein said resilient member is a flexural spring made of a U-shaped thin metal rod.

Claim 4

A device according to claim 1 wherein said arched bridge is formed by a flexural spring metal rod which is of a substantially U-shape, the arms of which have, at the end of the spring means to act on the cam, approached sections bent in accordance with a circular arch, while for all the remaining length thereof, they show an arched shape, the curvature of which is opposite to the former and finally, terminating each at the opposite end with an outward projecting extension adapted to be inserted in a hole pertaining to the stationary element.

Claim 5

A device according to claim 3, wherein said spring is of a substantially U-shaped form, thE legs of which have at the end of the spring adapted to act upon the cam means closely spaced apart sections according to a circle arc, while for the remaining length thereof has an arcuate shape, the curvature of which is opposite to the former and, finally, terminating each at the opposite end with an outward projecting extension adapted to be inserted in a hole of the stationary element.

Claim 6

A device according to claim 3, in which said arched bridge is formed of a thin metal resilient rod adapted to be inserted under load in the stationary element of the hinge, so that an end thereof is secured to the farthest end of said element from the pivoting pin, whereas the median portion thereof contacts the bottom wall of said element and the other end thereof is engaged with said cam means through a small roller.

Claim 7

A device according to claim 5, wherein said arched bridge is of a substantially U-shape, each of the legs of which have adjacent the joint section thereof carrying said small roller on inward bending and terminating at the opposite ends thereof with an outward projecting extension suitable to be inserted in a hole of said stationary element, said legs having an arcuate shape.

Claim 8

A device according to claim 6, wherein said resilient bridge is of a substantially U-shape, the legs of which spring being at right angles to the joint section thereof carrying said small roller and each of which legs having at the opposite end thereof an outward projecting extension suitable to be inserted in a hole of said stationary element, said legs having an arcuate shape.

Claim 9

A device according to claim 3, wherein said resilient bridge is of a substantially rectangular section, the long sides of said rectangle being arcuate and having the two free ends thereof forming one of the short slides of said rectangle and matching to each other at the median portion of said small roller.

Claim 10

A device according to claim 1, in which the resilient bridge is formed of a steel coil spring at one end having aperture means being adapted to accommodate a small roller forming part of said resilient bridge and some bent over tabs adapted to accommodate the axial side projections of said roller means, said spring being adapted to be inserted under load in said stationary element of the hinge, so that an end thereof is secured to the farthest end of said stationary element from the pivoting pin, whereas the median portion thereof contacts the bottom wall of said element and the other end thereof is engaged with said cam means through said roller means, said cam means having a constant radius bent section and a varying, preferably increasing, radius bent section adjacent to its extreme edge.

Claim 11

A device according to claim 5, wherein said small roller is hollow.

Claim 12

A device according to claim 5, wherein said small roller has two side sleevelike projections.

Claim 13

A device according to claim 5, wherein said cylindrical small roller is provided with winding up a wire.

Claim 14

A device according to claim 5, wherein said small roller is provided with metal plate curling.

Claim 15

A device according to claim 1, wherein said arched bridge urges the stationary part through a base, adjustably fitting, to the stationary part of the hinge, said arched bridge having the other end thereof engaged with said cam means.

Claim 16

A device according to claim 14, wherein said base accommodating said arched bridge is connected with the stationary part of the hinge through a subbase provided with means for fastening thereof to the frame relative to which said door is to be hinged, and adjustable coupling means to said stationary part of said hinge.

Claim 17

A device according to claim 1, wherein said arched bridge is inserted under load within the stationary element of the hinge, so that an end thereof is secured to the farthest end of said element from the pivoting pin, whereas the median portion thereof contacts the bottom wall of said element and the other end thereof is engaged with said one or two cams, further auxiliary spring means serially connected being inserted for increasing the pressure of the resilient bridge on the cam means.

Claim 18

A device according to claim 16, wherein the auxiliary springs are cup springs threaded into a projection in the stationary part of the hinge.

Claim 19

A device according to claim 16, wherein the auxiliary springs are flexural leaf springs interconnected by ties, adapted to be accommodated within the inner projections of said stationary part of the hinge.

Claim 20

A hinge according to claim 1, wherein the link having said cam means is made of pressed metal sheet.

Claim 21

A hinge according to claim 1, wherein the link having said cam means is of molded metal obtained by hot-pressing, die casting and sintering.

Claim 22

A hinge according to claim 1, wherein the link having said cam means is formed of a packet of sheared iron sheets arranged in a side-by-side relationship.