Oil cylinder for a stand carriage

Details Oil cylinder for a stand carriage Oil cylinder for a stand carriage

1997-11-06

1999-03-30

Richter, Sheldon J.

Power plants

Pressure fluid source and motor

Ram driven by fluid pumped from reservoir

60481, F15B 1520

Patent

active

058874313

ABSTRACT:
An oil cylinder has a valve body, an oil pressure chamber, and an oil storage chamber. A shaft extends from the oil pressure chamber. The valve body has a piston chamber, an arc-shaped through hole, an enlarged hole receiving a rotating post, a first oil passage, a second oil passage, a third oil passage, a fourth oil passage, an oil hole, a first channel, and a second channel. A piston is disposed in the piston chamber. A trip lever passes through the arc-shaped through hole. The trip lever is connected to the rotating post. A big ball is placed in the third oil passage. A small ball is placed in the second oil passage. A compression spring is connected to the bolt and the big ball. A coiled spring is connected to the big ball and the small ball. A swivel rod is connected to the rotating post. A V-ring oil seal encloses the piston. An oil relief device is disposed on the valve body and inserted in the first channel.

REFERENCES:
patent: 3775027 (1973-11-01), Craft
patent: 4144713 (1979-03-01), Clark et al.
patent: 4487019 (1984-12-01), Johansson

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