Cam mounting for an impact tool

Details Cam mounting for an impact tool Cam mounting for an impact tool

1977-01-14

1978-04-04

Hafer, Robert A.

Tool driving or impacting

Impacting devices

With means to cause or control advance of hammer head

173123, B25D 900

Patent

active

040821528

ABSTRACT:
A motor driven cam and spring impact tool with an improved mounting for the cam. The impact tool includes a driving shaft for rotation relative to the housing. A hammer is positioned in the housing for axial movement with respect to the housing. An annular cam with cam rollers translates the rotational motion of the hammer. A spring urges the hammer in one direction to cause an impact upon each reciprocation. A collar, driven by the shaft, is connected to the cam for rotating it with respect to the rollers. A pair of pins are connected between the cam and the collar for driving the cam. The holes in the cam receiving the pins are enlarged in the direction of rotation to allow the cam to move a selected distance with respect to the pins. This creates backlash at the drop off points on the camming surface.

REFERENCES:
patent: 3302732 (1967-02-01), Roll
patent: 3322208 (1967-05-01), Skoog
patent: 3374685 (1968-03-01), Eheim
patent: 3774700 (1973-11-01), Shepherd

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