Patent ID: 6726219
Filing Date: 2004-04-27
Classification: F16F,F16J,Y10S

Abstract:
An air damper comprising:a cylindrical body having a first end, a second end, and an interior extending therebetween; a reciprocating piston within said cylindrical body; a lip seal operatively positioned between said interior of said cylindrical body and said reciprocating piston to form a relatively airtight seal; a coating of graphite powder or molybdenum disulfide on said lip seal so as to increase smoothness of operation of said reciprocating lip seal during relatively low force or speed manual operation; an air communication passage which is selectively restricted as said piston reciprocates so as to effect damping; and said graphite powder further includes a minimum 0.5 seal part weight graphite powder or molybdenum disulfide.