Torque-multiplying hand wrench

Details Torque-multiplying hand wrench Torque-multiplying hand wrench

1984-04-16

1985-10-15

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

81 63, 81 632, B25B 1300

Patent

active

045466769

ABSTRACT:
A torque-multiplying hand wrench incorporating the features of a standard ratchet wrench along with a lever action torque multiplying feature. A torque multiplying lever arm is attached to a cam element, the eccentric of which acts upon yoke-shaped actuator when the lever arm is rotated. The actuator interacts with a standard ratchet device to apply torque to a threaded fastener. The handle of the wrench acts either as a standard ratchet wrench handle or as a reaction arm in conjunction with use of the torque multiplying lever arm.

REFERENCES:
patent: 1418161 (1922-05-01), Pease
patent: 2510483 (1950-06-01), Schnepel et al.
patent: 2711110 (1955-06-01), Brame
patent: 2972919 (1961-02-01), Stalkup
patent: 3256758 (1966-06-01), Medesha
patent: 3529498 (1970-09-01), Northcutt
patent: 3621738 (1971-11-01), Northcutt
patent: 4091890 (1978-05-01), Wilmeth et al.
patent: 4304157 (1981-12-01), Yamada et al.
patent: 4339968 (1982-07-01), Krieger
patent: 4377955 (1983-03-01), Muller

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