Tool driving or impacting – Impacting devices – Hammer head driven by relatively moving motion transmitting...
Patent
1973-11-01
1976-01-27
Abbott, Frank L.
Tool driving or impacting
Impacting devices
Hammer head driven by relatively moving motion transmitting...
74110, 74160, 173126, 173132, B25D 900
Patent
active
039346560
ABSTRACT:
An automatic hydraulic hammer including a frame with suitable mountings to attach the frame to an existing hydraulic feed test boring drill machine. A weighted hammer is reciprocal within the frame through a measured distance and is arranged for substantially frictionless operation. A hydraulic cylinder mounts upon the frame and receives its power from the hydraulic test boring drill machine. A plunger is responsive to function of the hydraulic cylinder and terminates downwardly in an arrow-shaped head which releasably connects to a plurality of pivotally mounted clamps. When the head engages the clamps, the hydraulic cylinder is functioned to raise the plunger and the releasably attached hammer through a known distance. The top of the frame is provided with a plurality of depending fingers which function with the clamps to quickly and positively release the head at the top of the hammer travel. The release of the hammer permits a free fall within the guide frame through a known distance in accordance with standard penetration test procedures.
REFERENCES:
patent: 224483 (1880-02-01), Segur
patent: 841032 (1907-01-01), Mellgren
patent: 2559478 (1951-07-01), Stone
patent: 2787123 (1957-04-01), Delvaux
patent: 3039546 (1962-06-01), Janson et al.
Abbott Frank L.
Pate III William F.
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