E - Fixed Constructions – 02 – F
Patent
E - Fixed Constructions
02
F
E02F 5/20 (2006.01) B25D 9/00 (2006.01) B25D 9/02 (2006.01) B25D 9/04 (2006.01) E21B 1/00 (2006.01) E21B 4/14 (2006.01) E21B 10/36 (2006.01)
Patent
CA 2159861
A pneumatic ground piercing tool has a reversing mechanism than can be operated by remote control but which does not contain a moving valve member inside the tool which become jammed. Such a tool generally includes, as essential components, an elongated tubular housing having a rear opening, a striker disposed for reciprocation within an internal chamber of the housing to impart impacts to a rear impact surface of the anvil for driving the body through the ground, an air distributing mechanism for effecting reciprocation of the striker, a tail assembly mounted in a rear end opening of the housing that secures the striker and air distributing mechanism in the housing, and a reversing mechanism including a supplemental air line capable of supplying compressed air for reverse operation to a radial port in the air distributing mechanism. Opening the supplemental air line to the atmosphere produces a short stroke forward mode of operation useful for operations wherein a less forceful impact is desirable.
Earth Tool Corporation
Shapiro Cohen
LandOfFree
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