Tool for drilling and/or chiseling

Details Tool for drilling and/or chiseling Tool for drilling and/or chiseling

1998-04-07

1999-11-02

Smith, Scott A.

Tool driving or impacting

Impacting devices

Hammer head driven by pulsating fluid pressure

173109, 173212, B25D 1104

Patent

active

059752173

ABSTRACT:
A tool for drilling and/or chiseling has a striking mechanism (6) within a guide tube (9) for reciprocating a first piston (7) and, via an air cushion, for reciprocating a second piston (19) within the guide tube. The second piston drives a driving anvil (17) in the driving direction. Between the first and second pistons (7, 19) the guide tube (9) has a series of radially extending first air passages (10) arranged in a first plane (E1) extending perpendicularly of the driving direction. A control body can be shifted over the guide tube (9) and is connected to the driving anvil (17). The guide tube (9) has a second series of radially extending second air passages (11) therethrough arranged in a second plane (E2) spaced from the first plane (E1) at a distance (A) opposite to the driving direction.

REFERENCES:
patent: 4113035 (1978-09-01), Stiltz et al.
patent: 4442906 (1984-04-01), Simpson
patent: 4567951 (1986-02-01), Fehrle et al.
patent: 5111890 (1992-05-01), Ranger et al.
patent: 5435397 (1995-07-01), Demuth
patent: 5775440 (1998-07-01), Shinma
patent: 5873418 (1999-02-01), Arakawa et al.

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