High speed unloader for gas compressor

Details High speed unloader for gas compressor High speed unloader for gas compressor

2005-12-06

2005-12-06

Freay, Charles G. (Department: 3746)

Pumps

Expansible chamber type

Having separate noncyclic valve

C417S446000, C417S510000, C251S064000

Reexamination Certificate

active

06971861

ABSTRACT:
A piston system for a reciprocating compressor is adapted for high speed, high pressure unloading conditions by providing a dual stage piston assembly wherein the piston is adapted for absorbing and redistributing a portion of the load during the high pressure applications or high pressure portion of a cycle without reducing the efficiency of the system during normal loads. Pressure of up to 4000 psi can be handled without damage to the piston or other valve components. The valve plate is held in the closed position by a compression spring which is adapted to be engaged by a finger/driver upon reciprocation of the valve piston. The finger driver moves with the piston against the valve plate to open the valve on the plunger downstroke and move away from the valve on the plunger upstroke. A shock absorbing element is positioned in the plunger/finger assembly to absorb the shock of the driving downstroke, thereby reducing the shock of the finger against the valve plate.

REFERENCES:
patent: 2626100 (1953-01-01), McIntyre
patent: 4632145 (1986-12-01), Machu
patent: 4869291 (1989-09-01), Hrabal

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