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
GB1763121A
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Individual
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Individual
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Priority to GB1763121ApriorityCriticalpatent/GB179458A/en
Publication of GB179458ApublicationCriticalpatent/GB179458A/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
B25D9/18—Valve arrangements therefor involving a piston-type slide valve
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Physics & Mathematics
(AREA)
Fluid Mechanics
(AREA)
Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
Earth Drilling
(AREA)
Abstract
179,458. Rayner, G. H. T., and Rayner, P. June 28, 1921. Fluid-actuated gears.-The valve s is provided with three collars of equal diameter. The end collars have bleed ports q, r which supply reduced-pressure fluid to the valve-chest ends, and passage t, u which put the ends into communication with exhaust grooves v, w which are connected to a common exhaust at the back of the chest. The main exhaust is controlled by the valve which is thrown upon the piston passing the ports g, h. The piston may control an auxiliary exhaust from the cylinder a.
GB1763121A1921-06-281921-06-28Improvements in or relating to valve apparatus for rock drills and like fluid pressure operated tools
ExpiredGB179458A
(en)