Motors: expansible chamber type – Cyclically operable – Distributor forms traversed movable portion of working...
Patent
1974-11-11
1976-07-20
Maslousky, Paul E.
Motors: expansible chamber type
Cyclically operable
Distributor forms traversed movable portion of working...
91321, 91328, 91337, 251 50, F01B 718, F01L 1702
Patent
active
039699846
ABSTRACT:
Impact tools are described which are capable of developing percussive forces for rock drilling and other repetitive high force applications. A hydroacoustic oscillator contained in such tools includes a hammer and a valve mechanism which is actuated by the hammer for controlling the flow of pressurized fluid so as to establish pressure variations which sustain the oscillation of the hammer. A number of alternative valve mechanisms are disclosed, each including a valve element, the motion of which is controlled by controlling the flow of fluid with respect to the valve element as the hammer and valve element move relative to each other. Such flow control is afforded by chambers defined by the valve element; hydraulic fluid flow with respect to which is controlled so as to determine the deceleration of the valve element and the motion of the element in its actuation by the hammer.
REFERENCES:
patent: 1584715 (1926-05-01), Bayles
patent: 1895153 (1933-01-01), Feucht
patent: 2707941 (1955-05-01), Hardy
patent: 3592109 (1971-07-01), Eskridge
Hydroacoustics Inc.
Kacher Martin Lu
Maslousky Paul E.
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