Fluid actuated percussion mechanism

Details Fluid actuated percussion mechanism Fluid actuated percussion mechanism

B - Operations, Transporting

25

D

121/21

B25D 9/04 (2006.01) B25D 9/16 (2006.01) E02D 7/10 (2006.01) E21B 4/14 (2006.01)

Patent

CA 1072836

PERCUSSION MECHANISM Abstract of the Disclosure Fluid-actuated percussion mechanism includes a housing with an internal cylindrical space receiving a reciprocating piston dividing the space into a working stroke chamber and an idle stroke chamber. The mechanism further includes fluid distributing means and a distribution unit mounted in the housing and communicating the chambers and the source of the working fluid. The housing also accom- modates a work-performing member adapted to receive impacts from the piston. The distribution unit includes at the inlet of at least one of the chambers a valve made in the form of a resilient annular element. The surface of the distribution unit has made therein valve seats of which the number corresponds to that of inlets for supplying the working fluid into the chamber. The resilient valve element is taut about the surface of the distribution unit in opposition to the inlets and encircles the periphery of the unit, the resilient element defining by the internal surface thereof with the valve seat, and by the external surface thereof with the housing at least one inlet passage for supplying the working fluid to the inlets. The disclosed structure of the valve, of the distribution unit and of the housing enables to increase the total flow area of the passages through while the working fluid is sup- plied to the inlets of the chambers and thus to step up the power output of the percussion mechanism.

282142

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