Damper including resilient friction member and seat assembly using same

摘要

A damper (20) for damping motion between two relatively moveable members, such as pivotal motion between components in office chairs (10). The damper (20) includes a outer member (22) having an internal recess (23) with a inner surface (24) and a crosswise oriented hole (30) intersecting the recess (23), and an inner member assembly (32) moveable relative to the outer member (22) having a shaft (34) with a resilient friction member (38) mounted thereon. The resilient friction member (38) frictionally engages the inner surface (24) in an interference fit relationship thereby radially precompressing the resilient friction member (38). The resilient friction member (38) preferably has one or more protrusions (40) that may be axially or radially oriented.