Low leak boom control check valve including an insert

Details Low leak boom control check valve including an insert Low leak boom control check valve including an insert

2005-02-01

2005-02-01

Michalsky, Gerald A. (Department: 3753)

Fluid handling

Systems

Supply and exhaust

C091S436000, C091S447000, C091S451000

Reexamination Certificate

active

06848473

ABSTRACT:
An insert or cartridge that fits into a cavity in a valve body provides a check valve function and an anti-cavitation function and a pressure relief function. This insert is substantially circular and has an internal cavity with a valve assembly that has two pairs of valve seats, one pair of valve seats providing the anti-cavitation function and the other pair of valve seats providing the pressure relief function. The outside of the insert itself engages with a sealing surface in the cavity in the valve body to provide the check valve function.

REFERENCES:
patent: 3506031 (1970-04-01), Stacey
patent: 3978879 (1976-09-01), Termansen et al.
patent: 4958553 (1990-09-01), Ueno
patent: 5778932 (1998-07-01), Alexander
patent: 5921165 (1999-07-01), Takahashi et al.
patent: 6581639 (2003-06-01), Fiala et al.

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