Spring devices – Vehicle – Comprising compressible fluid
Patent
1988-04-20
1989-05-30
Garrett, Robert E.
Spring devices
Vehicle
Comprising compressible fluid
188300, 18832222, F16F 936, F16F 932
Patent
active
048343471
ABSTRACT:
A fluted piston for a volume-compensated pressurized adjustable length positioner. The cylinder is charged through the charging/discharging valve so that the opposed fluid chambers defined inside the cylinder bore by the slidably movable piston are filled with compressible fluid at elevated pressure. An actuating rod in the piston operates a valve in the piston to open communication between the opposed chambers and allow selective extension and retraction of the piston rod. The large-diameter piston rod has an elongated head configuration formed by flute ribs. These ribs provide bearing support for the extended piston rod and create a volume compensating space in the piston head to account for the large ratio of extended-rod cylinder volume to retracted rod cylinder volume.
REFERENCES:
patent: 3223206 (1965-12-01), Bainbridge et al.
patent: 3343833 (1967-09-01), Fader
patent: 3762514 (1973-10-01), Freitag
patent: 3828651 (1974-08-01), Dorner et al.
patent: 4113220 (1978-09-01), Godwin et al.
patent: 4257582 (1981-03-01), Wirges
patent: 4667780 (1987-05-01), Pauliukonis
Garrett Robert E.
Jason Marius J.
Kapsalas George
Pauliukonis Grazina J.
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