Forward biased switch for a reversible hammer drill

Details Forward biased switch for a reversible hammer drill Forward biased switch for a reversible hammer drill

1978-08-03

1980-05-27

Reynolds, Wm. Carter

Tool driving or impacting

Drive adjustable to completely change kind of drive

Adjustable to impacting device

200 50C, 200157, 173170, E02D 702, B23B 4500

Patent

active

042045800

ABSTRACT:
A hammer drill having a reversible switch which is forward biased normally to prevent the drill from operating in the hammer mode while the switch is in the reverse position. This is a precaution to prevent damage to the clutch teeth which are designed for ratchet action when the tool is operated in the forward direction, but will lock down in reverse to stall tool or damage the mechanism.

REFERENCES:
patent: 3260827 (1966-07-01), Frenzel
patent: 3467801 (1969-09-01), Matthews
patent: 3755640 (1973-08-01), Kaman et al.
patent: 4097703 (1978-06-01), Houser
patent: 4097705 (1978-06-01), Harvell

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