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US 4,733,689 AGranted
Fluid pressure activated valve
OwnerLee Osnasinventor
Life of this patent
Estimating the term…
Abstract
A valve for use with irrigation systems. The valve is fluid pressure actuated and includes a two part movable upper valve body portion which seals about the mouth of a pipe. A pedestal is threadably secured to the pipe and guides the movable valve body. The valve body is biased against the pipe by a spring connected to the pedestal.
Claims13
A fluid pressure actuated valve adapted to be seated in sealing relation about the mouth of a pipe in normally fluid sealing relation thereto comprising:
- a movable valve body having an upper portion and a lower portion, said upper and lower portions being joined at their respective circumferential edges and defining an interior region;
- a pedestal, a threaded axially depending mounting rod affixed on said pedestal and secured within said pipe, the pedestal and threaded axially depending mounting rod operable to secure said valve body in its normally seated position about the mouth of said pipe;
- means forming a fluid impermeable flexible seal secured at its peripheral edge between said upper and lower portions, a portion of said seal being secured on said pedestal;
- means for resiliently holding said valve body in fluid sealing relation against the pipe;
- and
- means for delivery of fluid under pressure to said interior region of the upper portion of the valve body so as to act against the resilient means to unseat said valve body against the action of said resilient means and urging it to an unseated position above the mouth of the pipe.
3 more elements
The valve as set forth in clain 3, wherein:
- said space is no greater than 0.250 inches.
A fluid pressure actuated valve operable selectively to occlude the mouth of a riser, the valve comprising:
- a valve body operable to move along a path of travel between a closed position and an opened position;
- a mounting rod adapted releasably to be secured internally of the riser and mounting a pedestal slidably received within the valve body;
- a diaphragm mounted internally of the valve body interconnecting the valve body and the pedestal in fluid sealing relation to define a substantially fluid tight chamber internally of the valve body;
- a spring borne by the valve operable resiliently to hold the valve body in the closed position;
- and
- means for selectively delivering a fluid under pressure to the fluid tight chamber to urge the valve body to move along the path of travel from the closed position to the opened position to achieve the selective opening of the riser.
3 more elements
Dependencies are inferred from the claim text.