Infinite position door hold open

• US 3,965,531 A
• Filed: 11/12/1975
• Issued: 06/29/1976
• Est. Priority Date: 11/12/1975
• Status: Expired due to Term

• Current Assignee: General Motors Corporation (Motors Liquidation Co. GUC Trust)
• Original Assignee: General Motors Corporation (Motors Liquidation Co. GUC Trust)
• Inventors: Wize, Gary A., Fox, Robert M.
• Primary Examiner(s): Larkin, G. V.
• Application Number:
  US05/631,053
• Time in Patent Office: 230 Days
• Field of Search: 16/49, 16/54, 16/60, 16/68, 16/82, 16/139-147
• US Class Current: 16/338
• CPC Class Codes: E05D 11/082 with substantially radial friction, e.g. cylindrical friction surfaces
• CPC Class Codes: E05Y 2900/531 Doors

Abstract

An infinite position door hold open includes a pair of pivotally interconnected hinge members which are respectively mounted on the door and body. The door mounted hinge member pivotally supports an arcuate link having oppositely facing braking and frictional surfaces, both generated about the pivotal axis of the hinge members. The braking surface is frictionally engageable with a brake pad adjustably mounted on the body mounted hinge member. The engagement of the braking surface with the brake pad is controlled by pivotal movement of a wedging cam relative to the door mounted hinge member between non-wedging limit positions through an intermediate wedging position. The cam has a friction member in constant engagement with the frictional surface of the brake member. Any reversal of the direction of movement of the door relative to the body causes the friction member of the cam to move the cam to the intermediate wedging position and wedge the braking surface of the brake member into frictional engagement with the brake pad.

Claims

1. An infinite position door hold open comprising, in combination, a pair of pivotally interconnected hinge members movable in door opening and closing directions relative to each other, a brake pad mounted on one hinge member for movement therewith, a brake member mounted on the other hinge member for movement therewith and movement relative thereto into and out of frictional engagement with the brake pad to selectively and alternately hold the hinge members against movement or permit movement in either direction, a brake member actuator mounted on said other member, and cooperating frictionally engageable means on the brake member and brake member actuator operable upon reversal of the direction of movement of the hinge members for moving the brake member relative to the one hinge member and into frictional engagement with the brake pad to thereby hold the hinge members against movement in either direction.

2. An infinite position door hold open comprising, in combination, a pair of pivotally interconnected hinge members movable in door opening and closing directions relative to each other, a brake pad mounted on one hinge member for movement therewith, a brake member pivotally mounted on the other hinge member and including an arcuate braking surface and an arcuate frictional surface, both generated about the pivotal axis of the hinge members, an actuator rotatably mounted on said other hinge member, means limiting rotational movement of the actuator relative to said other hinge member between rotatably spaced limit positions through an intermediate wedging position, means on the actuator engageable with the frictional surface of the brake member to rotate the actuator from a limit position to the wedging position upon reversal of the direction of movement of the hinge members, and means on the actuator engageable in wedging position with the brake member to effect movement of the brake member and engagement of the braking surface thereof with the brake pad to hold the hinge members against relative movement.

3. An infinite position door hold open comprising, in combination, a pair of pivotally interconnected hinge members movable in door opening and closing directions relative to each other, a brake pad, means adjustably mounting the brake pad on one hinge member for movement therewith and adjusting movement relative thereto, a brake member pivotally mounted on the other hinge member and including an arcuate braking surface and an arcuate frictional surface, both generated about the pivotal axis of the hinge members, an actuator rotatably mounted on said other hinge member, means limiting rotational movement of the actuator relative to said other hinge member between rotatably spaced limit positions through an intermediate wedging position, means on the actuator frictionally engageable with the frictional surface of the brake member to rotate the actuator between the limit positions and through the wedging position upon full reversal of the direction of movement of the hinge members, and means on the actuator engageable in wedging position with the brake member upon initial reversal of the direction of movement of the hinge members to effect movement of the brake member relative to the other hinge member and engagement of the braking surface thereof with the brake pad to hold the hinge members against relative movement, continued movement of the actuator to the other limit position or return of the actuator to the one limit position releasing the brake member from the brake pad to permit relative movement of the hinge members.