Motors: expansible chamber type – Cyclically operable – Adjustable working member reversal position
Patent
1975-05-01
1977-02-08
Maslousky, Paul E.
Motors: expansible chamber type
Cyclically operable
Adjustable working member reversal position
91300, 91321, F01L 2504, F01B 718
Patent
active
040066657
ABSTRACT:
This disclosure relates to a percussion tool which includes a housing having a chamber reciprocally mounting a piston with first and second pressure ducts at opposite ends of the latter and a control duct therebetween as well as a return duct in fluid communication with the chamber at a point intermediate the points of entry of the first and second pressure ducts and reciprocal valve means for controlling the reciprocal motion of the piston, the improvement including a plurality of branch ducts of the control duct opening into the chamber in such a fashion that the branch ducts are successively opened and closed during the reciprocation of the piston.
REFERENCES:
patent: 354660 (1886-12-01), Sergeant
patent: 909923 (1909-01-01), Mitchell
patent: 3552269 (1971-01-01), Arndt
patent: 3780621 (1971-06-01), Romell
Fa. Ingenieur Gunter Klemm Spezialuntrnehmen fur Bohrtechnik
Maslousky Paul E.
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