Hydraulic striking apparatus

Details Hydraulic striking apparatus Hydraulic striking apparatus

1975-04-18

1977-06-14

Maslousky, Paul E.

Motors: expansible chamber type

Cyclically operable

Distributor forms traversed movable portion of working...

91298, 91300, 91319, 91321, F01B 718, F01L 2504, F01L 1700

Patent

active

040289958

ABSTRACT:
An hydraulically operated striking apparatus for driving a rock drill or the like comprises a body having an axial, generally cylindrical, interior space with an inwardly protruding annular member. A cylindrical piston is positioned in the space in sliding contact with the protruding annular member, and the piston has canal means in its outer surface. The body, the annular member and the piston define two annular spaces and an annular distributing valve is slidably disposed within one of the spaces. The two spaces communicate with each other by means of the piston canal when the piston is in a first slidable position, and the protruding annular member prevents communication between the two spaces when the piston is in a second slidable position. The piston is provided with an axially disposed extension which, in combination with an outlet means, serves to permit a third, annular axial space to communicate with either an inlet means or an outlet means at all times.

REFERENCES:
patent: 707920 (1902-08-01), Haeseler
patent: 1132649 (1915-03-01), Brazelle
patent: 1593606 (1926-07-01), Slater
patent: 2906244 (1959-09-01), Christensen

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