Percussion tool

Details Percussion tool Percussion tool

1999-10-25

2000-12-05

Smith, Scott A.

Tool driving or impacting

Impacting devices

With impact cushioning means

173128, 279 191, 279 196, B23B 4516, B25D 916

Patent

active

061553565

ABSTRACT:
A hammer holder, provided between a retainer sleeve and a cylinder, slidably holds an intermediate member in an axial direction. A predetermined clearance is maintained between the hammer holder and the retainer sleeve. The hammer holder has a recessed portion which is engageable with a flange of the intermediate member so as to restrict the slide movement of the intermediate member. A cushioning member receives a percussion force when the flange is stopped by the recessed portion. The clearance restricts a compression amount of the cushioning member so that a predetermined life of the cushioning member is assured.

REFERENCES:
patent: 4113035 (1978-09-01), Stiltz et al.
patent: 4442906 (1984-04-01), Simpson
patent: 5431235 (1995-07-01), Drumheller et al.
patent: 5873418 (1999-02-01), Arakawa et al.
patent: 6056070 (2000-05-01), Shinohara et al.

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