Back to results
US 4,537,383 AGranted
Valve
AssigneeOtis Engineering Corporation
InventorJohn V. Fredd
Life of this patent
Estimating the term…
Abstract
A ball valve with cooperative cranks for rotating the ball valve in which the cranks run in arcuate waffle plates having intersecting lands and grooves and wherein the ball valve is spherical and retainer rings cooperate with the ball valve to hold the cranks in engagement with the waffle plate even when pumping through the valve and moving the ball valve away from an upper seat while retaining the ball valve actuator in the closed position.
Claims7
A valve comprising:
- a housing having a flowway therethrough;
- a spherical ball valve member and cooperable seat means;
- ball rotation means for rotating said ball valve member between open and closed position including:
- a pair of spaced waffle plates formed as segments of a ring with their non-arcuate dimension parallel to said flowway,
- said waffle plates having symmetrical, helical intersecting lands and grooves in their interior surfaces,
- four cranks rotatably coupled in pairs to opposite spherical sides of the ball valve member,
- the cranks of each pair having helical lands and grooves inclined in opposite directions and mating with the lands and grooves of one waffle plate;
- and actuator means for reciprocating one of said waffle plates and crank pairs in directions parallel to said flowway to rotate the ball valve member between open and closed positions.
5 more elements
Dependencies are inferred from the claim text.