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Application filed by Gustav Albert BergmanfiledCriticalGustav Albert Bergman
Publication of NO130699BpublicationCriticalpatent/NO130699B/no
Publication of NO130699CpublicationCriticalpatent/NO130699C/no
B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
B25D9/06—Means for driving the impulse member
B25D9/10—Means for driving the impulse member comprising a built-in internal-combustion engine
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Engineering & Computer Science
(AREA)
Chemical & Material Sciences
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Combustion & Propulsion
(AREA)
Physics & Mathematics
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Fluid Mechanics
(AREA)
Mechanical Engineering
(AREA)
Percussive Tools And Related Accessories
(AREA)
Earth Drilling
(AREA)
Drilling And Exploitation, And Mining Machines And Methods
(AREA)