Importance

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Abstract

An apparatus for selectively and hydraulically locking a hollow cylinder body, such as a lathe cylinder body, onto, and unlocking the cylinder body from, a cylindrical shaft includes a tubular sleeve defining an axially extending passage therein, the sleeve including a centrally located exterior annular channel. The hollow body includes an axially extending cylindrical passage and a single female threaded bore formed to extend radially through the hollow cylinder body to bisect the axial passage thereof. The sleeve is inserted and fixed within the axially extending passage of the body so that the annular channel faces and is closed off by the walls of the axially extending passage to thereby form an annular cavity which is in fluidic communication with the female threaded bore. A cylindrical shaft, such as a lathe spindle or the like, is allowed to pass through the axial passage of the body and thus also through the axial passage of the sleeve so that the sleeve resides within a thin tubular passage between the body and the shaft. A hydraulic pressure fluid is poured into the bore to substantially fill the cavity. A cylindrical piston is screwed into the bore, producing hydraulic pressure which forces the annular channel against the shaft to thereby secure the sleeve, and thus the body, onto the shaft.

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First Claim