Impact tools

Details Impact tools Impact tools

1976-03-15

1978-03-07

Maslousky, Paul E.

Motors: expansible chamber type

Cyclically operable

Distributor forms traversed movable portion of working...

91289, 91303, 91321, 91328, F01B 718, F01L 2504, F01L 1700

Patent

active

040773043

ABSTRACT:
Impact tools are described which are capable of developing percussive forces for rock drilling, seismic exploration and other repetitive high force applications. Each of the tools contains a hammer and a valve which may be hydraulically actuated so as to constitute a hydroacoustic oscillator. The valve is actuated in one direction by being engaged by the hammer and in the other direction by fluid pressure means. The fluid pressure means may be controlled by varying the fluid pressure magnitude which applies forces to the valve to effect the movement thereof so as to control the frequency of oscillation of the hammer (i.e., impact blow frequency). Control may also be provided over the hammer stroke and the blow energy.

REFERENCES:
patent: 3007452 (1961-11-01), Lee
patent: 3411592 (1968-11-01), Montabert
patent: 3925985 (1975-12-01), Peterson
patent: 4022108 (1977-05-01), Juvonen

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