unloading/venting valve having integrated therewith a...

Details unloading/venting valve having integrated therewith a... unloading/venting valve having integrated therewith a...

2007-09-18

2007-09-18

Rivell, John (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S565330, C417S282000, C417S440000

Reexamination Certificate

active

10231771

ABSTRACT:
The invention relates to valves for air compressors, and more particularly, to an unloading/venting valve having integrated therewith a high-pressure protection valve where a pressure reducing valve has a discharge port in communication with the air system and a vent. The valve utilizes a valve body biased to form a seal between the discharge port and the vent. A governor monitors the air pressure in the system and generates a signal to move the valve body against the bias and unloads the system when a first predetermined threshold pressure is reached. In the event of a failure of the valve body to move at the first threshold pressure, the valve body is movable against the bias in response to a second predetermined threshold pressure reached in the system, thereby unloading the system.

REFERENCES:
patent: 1689673 (1928-10-01), Lalor
patent: 2700397 (1955-01-01), Compton
patent: 3343217 (1967-09-01), Daubenberger
patent: 3578883 (1971-05-01), Cheney
patent: 3811792 (1974-05-01), Kennedy, Jr.
patent: 3862782 (1975-01-01), Horowitz et al.
patent: 3866623 (1975-02-01), Klimek
patent: 4407548 (1983-10-01), Graham
patent: 4907842 (1990-03-01), Goldfein
patent: 5615929 (1997-04-01), Broome
patent: 6170508 (2001-01-01), Faust et al.
patent: 6280159 (2001-08-01), Agner et al.

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