Back to results
US 6,779,542 B2Granted
Low leak boom control check valve
AssigneeCase Corporation
InventorsGeorge T. Fiala, David W. Swaim
Life of this patent
Estimating the term…
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.
Claims7
A unitary insert for a cavity in a valve body, the insert comprising:
- a check valve,
- an anti-cavitation valve,
- a pressure relief valve;
- and
- an insert body comprising a first cup and a second cup, said first and second cups being threadedly engaged to define an enclosure for the anti-cavitation valve and the pressure relief valve, wherein said body is configured to be moveable in said cavity by a check valve spring.
2 more elements
Dependencies are inferred from the claim text.