Percussion tool

Details Percussion tool Percussion tool

1984-06-19

1986-09-23

Schran, Donald R.

Tool driving or impacting

Impacting devices

With means for rotating tool

173 48, 173123, 74 22A, 74 60, B25D 1600

Patent

active

046129995

ABSTRACT:
A percussion tool such as a hammer head comprises a housing for receiving a tool. A rotary drive mechanism rotates the tool about a longitudinal axis. A strike bolt is arranged for impacting against the tool. A cylinder sleeve is mounted coaxially with the longitudinal axis. A piston is slidable within the sleeve and is arranged to impact against the strike bolt. An impact drive mechanism is provided for imparting sliding movement to the piston toward the strike bolt. The impact drive mechanism comprises a wobble drive member mounted for longitudinal reciprocal movement and for rotary movement about an inclined axis disposed at an acute angle relative to the longitudinal axis. The wobble drive member is operably connected to the cylinder sleeve and to the rotary drive means to be driven thereby about the inclined axis so as to be longitudinally reciprocated. Thus, the rotary forces and impacting forces are derived from the same source.

REFERENCES:
patent: 1901981 (1933-03-01), Ousbach
patent: 2024684 (1935-12-01), Erfass
patent: 2491624 (1949-12-01), Shaff
patent: 2601788 (1952-07-01), Parker
patent: 4280359 (1981-07-01), Schmidt et al.
patent: 4284148 (1981-08-01), Wanner et al.
patent: 4446931 (1984-05-01), Bleicher et al.

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