Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB255722A
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Individual
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Individual
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Priority to GB255722ApriorityCriticalpatent/GB192277A/en
Publication of GB192277ApublicationCriticalpatent/GB192277A/en
B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
B25D9/14—Control devices for the reciprocating piston
B25D9/16—Valve arrangements therefor
B25D9/20—Valve arrangements therefor involving a tubular-type slide valve
Landscapes
Physics & Mathematics
(AREA)
Fluid Mechanics
(AREA)
Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
Earth Drilling
(AREA)
Check Valves
(AREA)
Abstract
192,277. Rayner, G. H. T., and Rayner, P. Jan. 27, 1922. Fluid-actuated gears.-In drills &c. wherein the operating fluid is distributed by a cylindrical valve h rolled from one port j to the other k and back by compression, the valve-chest ends comprise plates m secured by a bolt n passing through the valve. Air is fed to the underside of the valve by ports p, q in the casing and plates.
GB255722A1922-01-271922-01-27Improvements in or relating to valve apparatus for rock drills and like fluid pressure operated tools
ExpiredGB192277A
(en)