Door check
First Claim
1. In a door check, a housing;
- a shaft rotatably journalled in said housing;
cam means provided on said shaft in said housing and having first and second sections;
means for transmitting torque to the first section of said cam means so as to urge said cam means to rotate in a predetermined direction, including a first support movable in said housing at one side of said shaft, a first follower provided on said support and tracking the first section of said cam means, and first resilient means for biasing said support toward said cam means with a first force; and
damper means arranged to yieldably oppose rotation of said shaft in said direction, including a second support movable in said housing at the other side of said shaft, a second follower provided on said second support and tracking the second section of said cam means, and second resilient means for biasing said second follower against the second section of said cam means with a second force which at most equals 50 percent of said first force.
1 Assignment
0 Petitions
Accused Products
Abstract
A door check wherein a housing is affixed to the pivotable panel and a guide rail is affixed to the frame of a door. The housing contains a shaft which is rigidly connected with one end of an arm the other end of which is slidably guided by the rail. The shaft carries a disc cam having two asymmetric sections one of which is tracked by a spring-biased follower surrounding an antifriction bearing and tending to return the panel to its closed position and the other of which is tracked by a roller on the piston of a damper which yieldably opposes the movement of the panel back to its closed position. The configuration of the two cam sections is selected with a view to allow for a reduction of the resistance which the follower offers to opening of the door shortly after the panel leaves its closed position as well as to ensure that the damper can operate independently of the follower and vice versa. The damper has a spring which urges the roller against the cam and whose bias is not more than 50 percent of the bias of one or more springs which urge the follower against the cam.
93 Citations
19 Claims
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1. In a door check, a housing;
- a shaft rotatably journalled in said housing;
cam means provided on said shaft in said housing and having first and second sections;
means for transmitting torque to the first section of said cam means so as to urge said cam means to rotate in a predetermined direction, including a first support movable in said housing at one side of said shaft, a first follower provided on said support and tracking the first section of said cam means, and first resilient means for biasing said support toward said cam means with a first force; and
damper means arranged to yieldably oppose rotation of said shaft in said direction, including a second support movable in said housing at the other side of said shaft, a second follower provided on said second support and tracking the second section of said cam means, and second resilient means for biasing said second follower against the second section of said cam means with a second force which at most equals 50 percent of said first force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- a shaft rotatably journalled in said housing;
Specification