HAND-HELD ERGONOMIC JACKHAMMER HOLDER FOR CONCRETE FLOOR CHIPPING, JACKHAMMER AND HOLDER ASSEMBLY, AND METHOD OF USE THEREOF
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United States of America Patent
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Jun 19, 2014
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Jun 27, 2013
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Abstract
A self-adjusting hand-held ergonomic holder for jackhammer for manual use by an operator in chipping a hardened ground surface along a continuously variable chipping strike angle. The holder includes a rigid main frame with an upper load bearing handle and a cradle receiving a pneumatically powered hammer with a reciprocatable elongated pneumatically controlled bit operatively mounted to one end thereof. A coil spring assembly associated with the cradle dampens vibrations generated by the jackhammer. A spring loaded caster member is mounted to the main frame lower portion opposite the jackhammer and providing dynamic continuously variable relative angular chipping tilt of the elongated bit responsive to and acting against the handle bearing load, transversely along the ground surface between a cradle first position, making a generally small acute angle relative to the bearing load downward axis and spaced apart from the caster, and a cradle second position, making a large acute angle relative to the bearing load downward axis and closely proximate the caster.
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