Joints and connections – Manually releaseable latch type – Having operating mechanism
Patent
1993-06-30
1996-01-23
Knight, Anthony
Joints and connections
Manually releaseable latch type
Having operating mechanism
403120, 403 84, 297374, 29735412, A47C 1024
Patent
active
054860563
ABSTRACT:
An adjustable damper 12 for providing surface effect damping of a first member 10 when moving relative to a second member 20 and providing means for user operated locking of said first member 10 relative to said second member 20 at an infinite number of positions. The damper 12 is particularly useful for locking a chair back in place relative to a chair seat and providing damping of the rotation of the chair back when not locked. This allows the chair back to return to its desired position relative to the seat at a controlled rotational rate. The damper 12 operates by compressing first plate 40 and second plate 50 against elastomers 36A and 36B such that center plate 30 is restrained from rotation relative to plates 40 and 50. A secondary surface effect damping element provides damping when the primary damping element is unlocked. Pin 38 rides in slot 32 and indents the periphery 34 of elastomer 36C bonded to the periphery of slot 32 to provide damping. Slots 32 provide motion limitation between the first member 10 and the second member 20.
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Knight Anthony
Lord Corporation
Thomson Richard K.
Wayland Randall S.
Wright James W.
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