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INFINITE POSITION HOLD OPEN HINGE

  • US 3,643,289 A
  • Filed: 06/02/1969
  • Issued: 02/22/1972
  • Est. Priority Date: 06/02/1969
  • Status: Expired due to Term
First Claim
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1. An infinite position hold open hinge comprising, a pair of pivotally interconnected hinge members movable between first and second positions, a first element mounted on one member and having an arcuate surface generated about the hinge axis, a second element pivotally mounted to the other member for movement therewith and movement relative thereto about an element axis independent of the hinge axis, the second element having an arcuate surface generated about the hinge axis and frictionally engageable with the arcuate surface of the first element during swinging movement of the members, means resiliently maintaining the second element in the path of the first element, the element axis being located circumferentially behind the arcuate surface of the second element and the frictional drag generated between the arcuate surfaces pivoting the second element into the first element to increase the friction and the force required to move the members relative to each other from the first position to the second position, the element axis being located circumferentially ahead of the arcuate surface of the second element and the frictional drag generated between the arcuate surfaces pivoting the second element away from the first element to decrease the friction and the force required to move the members relative to each other from the second position to the first position, the frictional engagement between the arcuate sUrfaces maintaining the hinge members in any stationary position between first and second positions.

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