Patent ID: 7028817
Filing Date: 2006-04-18
Classification: F16F

Abstract:
1. A pressure adjustable aluminum shock absorber for mounting between a vehicle and an axle, the pressure adjustable aluminum shock absorber comprising: an aluminum shock body tube having an upper male thread and a lower male thread thereabout; a bore within the aluminum shock body tube, the bore having an internal diameter; an aluminum body mounting connection internally threaded with an internal female thread to couple in threaded engagement with the upper male thread for fluid tight connection therewith, the aluminum body mounting connection shaped to allow moveable connection to the vehicle; a damper piston fit in sealing engagement with internal diameter of the bore, the aluminum shaft elongate to extend from within the bore outwardly there from; a damper piston carried concentrically atop the aluminum shaft for sliding sealing engagement with the bore; adjustable flow orifices through the damper piston to restrain piston and shaft reciprocation within the bore, the adjustable flow orifices co-acting with hydraulic fluid therein and thereabout; an aluminum seal head internally threaded with an internal female thread to engage in threaded coupling with the lower male thread for fluid tight connection therewith, the aluminum seal head having a first internal groove, a second internal groove and a third internal groove axially disposed in serial depending relation relative to one another beneath the female thread for receiving seals, the first internal groove, the second internal groove and the third internal groove positioned axially in that order within the aluminum seal head; an o ring disposed in the first internal groove just beneath the female thread and for in combination therewith sealing the threaded coupling of the lower male thread and the aluminum seal head; a compression seal in the second internal groove located axially disposed beneath the o ring to seal the aluminum seal head in sliding contact with the aluminum shaft; a wiper seal in the third internal groove set axially below the compression seal in sliding contact with the aluminum shaft; a space defined by the bore, the damper piston, the orifices and the aluminum sealing head, the space for holding the hydraulic fluid during reciprocation of the aluminum shaft and damper piston relative to the aluminum shock body tube; a gas injection valve through the aluminum body mounting connection and into the bore for passing and maintaining gas under pressure to pressurize the space over the hydraulic fluid, and a shaft mounting connection affixed on the aluminum shaft whereat the aluminum shaft extends from within the bore, through the aluminum seal head outwardly thereof to the shaft mounting connection to allow moveable connection with axle.