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US 4,044,790 AGranted
Self re-arming valve
AssigneeMcDonnell Douglas Corporation
InventorNormand N. Rodrigue
Life of this patent
Estimating the term…
Abstract
A dump valve which automatically closes (re-arms) when the system pressure reaches a predetermined level.
Claims2
A self re-arming dump valve for use in controlling a pressurized fluid comprising:
- a valve port,
- a valve, piston,
- means for guiding said piston into said port,
- a spring for biasing said piston into said port,
- means for holding said piston from being forced out of said port by the pressurized fluid and for releasing said piston to permit opening of said valve by said fluid comprising a valve stem attached to said piston on the side opposite of the pressurized fluid, a roller follower to engage said valve stem and a spring to position said follower into engagement with said valve stem, and
- means for stabilizing said valve with said piston in said port comprising a detent in the end of the valve stem that is not attached to said piston, to co-act with said roller follower.
3 more elements
A mechanism for controlling the flow of pressurized fluid through a valve port comprising:
- a valve piston sized to close the valve port,
- a valve stem attached to the piston on the side opposite of the pressurized fluid,
- a mounting block to surround said stem and guide said piston into said port,
- a spring for biasing said piston into said port,
- a roller follower to overlie said valve stem and hold said piston in the port against the force of the pressurized fluid,
- means for stabilizing the mechanism in a position wherein said valve piston is in the valve port, said means including a detent in the end of the valve stem not attached to the piston to co-act with said roller follower to center the follower over the valve stem.
3 more elements
Dependencies are inferred from the claim text.