F - Mech Eng,Light,Heat,Weapons – 02 – B
Patent
F - Mech Eng,Light,Heat,Weapons
02
B
171/4
F02B 71/00 (2006.01) B25D 9/08 (2006.01) B25D 9/10 (2006.01) F02B 63/02 (2006.01) F02B 75/02 (2006.01)
Patent
CA 1118689
ABSTRACT OF THE DISCLOSURE In a drilling and chipping hammer, an internal combustion engine drives a crankshaft which, in turn, drives a percussion piston. The hammer includes a housing divided into two separate spaces, one communicating with the percussion mechanism and the other communicating with the internal combustion engine. Air or a fuel-air mixture is supplied through a valve in the housing into the percussion mechanism space. As the percussion piston is driven during one part of its reciprocating movement it draws the air or fuel-air mixture into the percussion mechanism space. During the other part of its reciprocating movement, the percussion piston forces the air or fuel-air mixture from the space through a flow passageway into the combustion space in the engine.
333220
Hilti - Aktiengesellschaft
Rolston George A.
LandOfFree
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