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US 5,238,025 AGranted
Two valves and a common control therefor
OwnerRichard W. Prestoninventor
Life of this patent
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OwnerRichard W. Prestoninventor
Estimating the term…
Valves and a common control therefor are disclosed in connection with an installation in a boat for use in hauling and servicing traps such as lobster traps. Such a boat has a line hauler and a davit provided with a snatch block and the davit is mounted to swing between positions in which the snatch block is located inboard above a washboard or with the snatch block outboard with the line to the trap trained over the snatch block and about the hauler. There are two valve controlled hydraulic circuits of which one controls the hauler and the other the davit. The control consists of a mount provided with a rotatable support which has a fixed fulcrum and slidably supports a shaft to which an operating handle is pivotally connected to the shaft so that by raising and lowering the handle the shaft is similarly moved and the shaft may be turned by swinging the handle relative to the support. The valves are connected to the shaft in a manner such that they may be independently operated, one only by raising and lowering the handle and the other by using it to turn the shaft.
A control common to two valves having related functions, said control including a mount, a support rotatably held by the mount, a fulcrum fixed on the support, a shaft extending through and slidably held by the support with one end exposed, a handle pivotally connected to said one end and to the fulcrum, whereby the shaft can be lowered or raised by lowering and then raising the handle and also whereby the shaft can be turned by turning the support by swinging the handle laterally, both valves below the mount, means connecting the shaft to one valve in a manner such as to be operated only by the turning thereof and means connecting the shaft to the other valve in a manner such that it is operated only by vertical movements thereof.
In combination, two hydraulic circuits each of which includes a valve and a device responsive to valve positions, each valve of the spool type and having an operating stem moveable axially thereof to effect operative and inoperative positions, and a control common to the two valves, said control including a mount, a support rotatably held by the mount, a fulcrum fixed on the support, a shaft extending through and slidably held thereby with one end exposed, a handle pivotally connected to said one end and the fulcrum, whereby the shaft can be raised or lowered by raising and lowering the handle and also the shaft can be turned by turning the support by swinging the handle laterally relative to the support, both valves below the mount, means connecting the shaft to the stem of the valve of one circuit in a manner such as to be operated only by the turning thereof and means connecting the shaft to the stem of the valve of the other circuit in a manner such that it is operated only by axial movements thereof.
Dependencies are inferred from the claim text.