Tool driving or impacting – Impacting devices – Impact transmitting anvil
Patent
1975-10-08
1978-09-05
Purser, Ernest R.
Tool driving or impacting
Impacting devices
Impact transmitting anvil
173162, 173170, B25D 914
Patent
active
041112695
ABSTRACT:
A hydraulically-powered impact tool for delivering a sequence of axial blows. A body houses a gas chamber, a storage chamber, a loading chamber, and a rod passage. The gas chamber and storage chamber are separated by a movable piston, and the storage chamber and loading chamber are separated by a movable piston head that is attached to a piston rod which is reciprocably movable in the rod passage and adapted to strike a work tool. An orifice in the piston head interconnects the storage chamber and the loading chamber when the orifice is open so as to provide a short-length and large-area passage for transfer of fluid from one side of the head to the other while the tool delivers its blow. A poppet is adapted to close the orifice in one position and to leave it open in another position. A probe on the piston is adapted to move the poppet so as to open the orifice at a predetermined axial position of the piston head in order to release energy stored in the gas chamber to drive the piston rod and thereby deliver the blow to the work tool. There is also disclosed valving means for automatic and continuous operation, and a handle which facilitates the usage of the impact tool.
REFERENCES:
patent: 1592856 (1926-07-01), Jimerson
patent: 1868627 (1932-07-01), Coates
patent: 2379181 (1945-06-01), Pontius et al.
patent: 3103337 (1963-09-01), Forte
patent: 3396634 (1968-08-01), Butterworth
patent: 3411592 (1968-11-01), Montaberh
patent: 3916764 (1975-11-01), Crover
Mon Donald D.
Pate III William F.
Purser Ernest R.
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