Brakes – Internal-resistance motion retarder – Cylinder structure
Reexamination Certificate
2006-04-18
2006-04-18
Schwartz, Christopher P. (Department: 3683)
Brakes
Internal-resistance motion retarder
Cylinder structure
C188S322170
Reexamination Certificate
active
07028817
ABSTRACT:
A gas pressure adjustable aluminum shock absorber to pressurize oil therein mounts between a vehicle and an axle and includes a threaded aluminum shock body tube, a bore therein an aluminum body mounting loop with an internal female thread to couple in threaded engagement with the threaded aluminum shock body tube for fluid tight connection, an aluminum shaft in the bore extends outwardly, and a damper piston is concentrically atop the aluminum shaft for sliding sealing engagement with the bore. Adjustable flow orifices through the damper piston restrains piston and shaft reciprocation therein and co-acting with hydraulic fluid therein and thereabout. An aluminum seal head internally threaded with an internal female to couple in threaded engagement with the threaded aluminum shock body tube for fluid tight connection and seals in the aluminum seal head to engage the aluminum shaft. A space defined by the bore, the damper piston, the orifices and the aluminum sealing head holds the hydraulic fluid during reciprocation of the aluminum shaft and damper piston relative to the aluminum shock body tube, and a gas injection valve in communicates with the bore for passing and maintaining gas under pressure. A method of making and assembling the pressure adjustable aluminum shock absorber by securing the threaded aluminum shock body tube against expansive deformation with the aluminum body mounting loop and the aluminum seal head each having internal female threads coupled to the threaded aluminum shock body tube for fluid tight connection.
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Passman Aaron
Schwartz Christopher P.
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