High frequency dampening apparatus

Details High frequency dampening apparatus High frequency dampening apparatus

2006-01-24

2006-01-24

Nguyen, Xuan Lan (Department: 3683)

Brakes

Internal-resistance motion retarder

Thrust member or piston structure

C188S282600, C267S124000

Reexamination Certificate

active

06988600

ABSTRACT:
A high frequency dampening apparatus for dampening the travel of a high frequency cycling driver. The present invention provides an enclosed housing having a fluid disposed therein. A piston rod is partially disposed within the housing and is engageable with a high frequency driver wherein the piston rod moves between a rearward position and a forward position relative to the housing. A plurality of fingers are circumferentially spaced and extend radially outward from the piston rod. A piston head retainer is connected to and extends radially outward from the piston rod and provides an orifice extending therethrough. A piston head is captured between the fingers and the piston head retainer and is movable between the rearward position, wherein the fingers engage the piston head allowing the fluid to freely flow between the fingers to allow said piston rod to freely travel to said rearward position, and the forward position, wherein the piston head retainer engages the piston head and forces fluid to flow through the orifice to slow the travel of the piston rod toward the forward position.

REFERENCES:
patent: 4099602 (1978-07-01), Kourbetsos
patent: 4467899 (1984-08-01), Molders et al.
patent: 4989700 (1991-02-01), Popjoy
patent: 5560456 (1996-10-01), Koch et al.
patent: 5964454 (1999-10-01), Volpel
patent: 6315093 (2001-11-01), Miura et al.

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