Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1986-09-05
1988-08-09
Schmidt, Frederick R.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 5726, 81 5729, 811801, B25B 2300, B25B 1700
Patent
active
047620315
ABSTRACT:
Improvements for ratchet wrenches which allows the socket to be turned without pivoting the handle. The improvements include a flat gear which either fits over the drive stud of the wrench's head and is sandwiched in between the head and a socket snapped on the head or is made integrally with the head. The gear projects beyond the socket and has driven gear teeth about its periphery. This allows for easy hand-turning. A shaft which has a means for turning at one end and a drive gear at the head end is provided. The shaft is mounted for both rotational and axial displacement and may slide from a home position in which the drive gear is free of the the flat gear to a position in which it meshes with that gear. A spring mechanically biases the shaft to its home position. A user may easily push the shaft to its operational position and, while maintaining it there, turn the shaft to turn the flat gear and thus the stud and socket. Upon releasing, the shaft automatically returns to its home position. In one embodiment the shaft is mounted to an elongated base so that the handle of the wrench can be moved independently of the shaft and base.
REFERENCES:
patent: 1659838 (1928-02-01), Schoeb
patent: 2703030 (1955-03-01), Marvin
patent: 4086829 (1978-05-01), Hudgins
patent: 4128025 (1978-12-01), Main
patent: 4515043 (1985-05-01), Gray
Kinney Richard G.
Schmidt Frederick R.
Vaught Bradley I.
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