Power tool

Details Power tool Power tool

1975-06-16

1976-09-14

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5729, 81 582, 81 90C, B25B 1700

Patent

active

039799778

ABSTRACT:
A power tool for applying a rotational force to a spring of a door counterbalancing mechanism. The power tool has a rotatable drive member mounted on a casing carrying a power transmitting structure. The drive member has a slot with an open end for accommodating the shaft of the counterbalancing mechanism. A releasable coupling structure drivably connects the drive member with the collar attached to the spring so that rotation of the drive member will apply rotational force to the spring. A motor connected to the power transmitting structure is operable to rotate the drive member. A socket adapter or pipe adapter can be connected to the drive member so that the power tool is usable to rotate nuts, bolts and pipes.

REFERENCES:
patent: 2550045 (1951-04-01), DeHetre
patent: 2556536 (1951-06-01), Harris
patent: 3196717 (1965-07-01), Sheppard
patent: 3216099 (1965-11-01), Boss
patent: 3257877 (1966-06-01), Ulrich et al.
patent: 3620105 (1971-11-01), Batten

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