Hydraulic frictional coupling
OwnerStewart D. Jelfsinventor
Life of this patent
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Abstract
In the field of fastening components together in such a way as to be able to transmit mechanical power, keyways and keys have been used; also, interlocking conical tapers have been used which are actuated either by a ring of screws or by oil-injection. The coupling according to the invention comprises an annular chamber housing an annular piston; the chamber and the piston have matching tapers. Oil is pumped into one end of the chamber to move the piston axially in one direction to cause radial expansion of the chamber to connect two components; oil is pumped into the other end of the chamber to move the piston in the opposite direction to disconnect said components. Uses of the coupling are, for example, to join the adjacent ends of coaxial shafts and to act as a locking bush to join concentrically arranged components.
Claims7
A coupling for frictionally joining and locking two components for simultaneous angular and axial movement, comprising:
- first and second concentric annular members connected by liquid-tight seals;
- at least one annular chamber defined by corresponding surfaces of said annular members;
- at least one captive annular piston housed within said chamber, said chamber and said piston having matching axially extending, conically tapered surfaces;
- injection means for selectively supplying hydraulic fluid under pressure to opposite ends of said piston and selectively causing radial expansion and contraction of said chamber by axial displacement of said piston.
Dependencies are inferred from the claim text.