Tool driving or impacting – Drive adjustable to completely change kind of drive – Adjustable to impacting device
Patent
1994-07-19
1995-10-10
Smith, Scott A.
Tool driving or impacting
Drive adjustable to completely change kind of drive
Adjustable to impacting device
173109, B25D 1104
Patent
active
054563240
ABSTRACT:
A percussion hammer for a tool includes a rotational drive source. A motion converting mechanism is connected to the rotational drive source for convening rotational movement of the rotational drive source into reciprocating movement. A striking mechanism is connected to the motion converting mechanism, and has a drive cylinder. A rotation transmitting mechanism is operative for transmitting rotational movement from the rotational drive source to the tool. A drive wheel is connected to the rotational drive source, and extends around the drive cylinder. A coupling member is connected to the drive cylinder, and extends around the drive cylinder. The coupling member is movable in a percussion axis direction. A movable adjustment member is connected to the coupling member for selectively connecting and disconnecting the coupling member to and from the drive wheel. Teeth are formed on an outer circumferential surface of the drive cylinder. A casing has an inner circumferential surface formed with a projection or a recess extending in the percussion axis direction. A sleeve has an outer circumferential portion which mates in shape with the projection or the recess of the casing. The sleeve engages the casing via the projection or the recess of the casing, and is movable in the percussion axis direction. Teeth are formed on the sleeve, and mate in shape with the teeth on the drive cylinder. The adjustment member is connected to the sleeve for selectively moving the teeth on the sleeve into and out of engagement with the teeth on the drive cylinder.
REFERENCES:
patent: 4066136 (1978-01-01), Wanner et al.
patent: 4236588 (1980-12-01), Moldam et al.
patent: 4274304 (1981-06-01), Curtiss
patent: 5111890 (1992-05-01), Ranger et al.
patent: 5379848 (1995-01-01), Rauser
Takagi Toshiaki
Watanabe Yoshihiko
Hitachi Koki Company Limited
Smith Scott A.
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