Air actuated hydraulic pump

Details Air actuated hydraulic pump Air actuated hydraulic pump

2005-03-01

2005-03-01

Freay, Charles G. (Department: 3746)

Pumps

Motor driven

Fluid motor

C417S440000, C091S290000, C091S303000, C091S34100R

Reexamination Certificate

active

06860727

ABSTRACT:
A hydraulic pump is equipped with an air motor, which is disposed in a housing and oil reservoir of the hydraulic pump, connected to an air source, and has a piston movable in a tube so that pressured air from the air source can cause reciprocation the a piston to pump hydraulic oil to other equipments such as a jack. The air actuated hydraulic pump is equipped with a pilot operated guided poppet valve comprised of several parts in separable connection, and a muffler so that the user doesn't have to replace the whole piston with a new one if only one of the parts is damaged, and that noise can be reduced when the pump is working.

REFERENCES:
patent: 3041975 (1962-07-01), Johnston et al.
patent: 3578285 (1971-05-01), Carlton
patent: 3597121 (1971-08-01), McClocklin
patent: 3788781 (1974-01-01), McClocklin
patent: 4074612 (1978-02-01), Miller
patent: 6415704 (2002-07-01), Wang

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