Percussion tool

Details Percussion tool Percussion tool

1984-01-23

1985-10-22

Yost, Frank T.

Tool driving or impacting

Impacting devices

Hammer head driven by spring

30168, 30277, 30367, 173139, B23B 4516, B25D 300

Patent

active

045482780

ABSTRACT:
A power operated percussion tool in which a shoulder (28) in the tool housing (10, 17) defines a rear rest position for working implement (12) attached to the tool, and in which an energy absorbing bias unit (23, 31) is arranged to resiliently load the working implement (12) toward the rest position. The bias unit (23, 31) comprises a spring (23) and a shock wave mitigating ring assembly (31) and acts between a rearwardly facing shoulder (22) in the housing (10, 17) and a forwardly facing shoulder (30) on the working implement (12). The ring assembly (31) includes two spring steel rings (32, 33) formed with mating conical contact surfaces for transforming axial load variations into radial deformation of the rings (32, 33).

REFERENCES:
patent: 1817591 (1931-08-01), Slatcher
patent: 2861778 (1958-11-01), Spurlin
patent: 3177952 (1965-04-01), West
patent: 3181626 (1965-05-01), Sussman
patent: 3559753 (1971-02-01), Meri
patent: 3861494 (1975-01-01), Grego

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