Pawl spring assembly for a rotary impact mechanism

Details Pawl spring assembly for a rotary impact mechanism Pawl spring assembly for a rotary impact mechanism

1977-07-21

1978-08-15

Staab, Lawrence J.

Tool driving or impacting

Impacting devices

With anvil arranged to transmit torsional impact to tool

267160, B25D 1500

Patent

active

041065727

ABSTRACT:
In a rotary impact mechanism which has input, output and inertia members substantially symmetrical and journaled about each other for independent angular movement about a common axis and a pawl and ratchet assembly for interconnecting the input and output members for torque transmission, the pawl spring assembly for biasing the pawl in a direction to engage the ratchet comprises a plurality of spring elements formed into a unitary structure and arranged with respect to the pawl to sequentially engage and load the pawl as the pawl is moved in a direction to disengage from the ratchet.

REFERENCES:
patent: 2028441 (1936-01-01), Decker
patent: 2107568 (1938-02-01), Haist
patent: 2712256 (1955-07-01), Fish
patent: 2954714 (1960-10-01), Swenson
patent: 3156309 (1964-11-01), Swenson
patent: 3413877 (1968-12-01), Teichmeier

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