Chisel retaining device

Details Chisel retaining device Chisel retaining device

1981-11-24

1985-01-29

Bilinsky, Z. R.

Chucks or sockets

Socket type

Lost motion

279 77, 279 90, B23B 3108

Patent

active

044961642

ABSTRACT:
A chisel retaining device for a power operated percussion tool comprises a one-piece lock shell (20) which surrounds the chisel stem (17) and is pivotably supported on the front end of the tool housing (10). By pivoting the shell (20) about an axis (X) transverse to the chisel axis a large dimension part (29) or a small dimension part (28) of a front opening (27) of the shell (20) are alternatively aligned with the chisel (15) to prevent or permit passage of a flange (18) on the chisel (15). A spring means (24) is provided to keep the shell (20) in closed position. An internal annular shoulder (21) of the shell (20) cooperates with a toroidal spring (22) received in a circumferential groove (23) on the housing (10) to form an axial abutting means for the shell (20), and an inwardly projecting heel (31) forms together with the shoulder (21) and the toroidal spring (22) a pivot means for the shell (20).

REFERENCES:
patent: 1105669 (1914-08-01), Levedahl et al.
patent: 1666425 (1928-04-01), Mock
patent: 1693872 (1928-12-01), Shaff
patent: 1694106 (1928-12-01), Richardson
patent: 2999407 (1961-09-01), Frangesco
patent: 3454284 (1969-07-01), Moores
patent: 3563559 (1971-02-01), Taylor

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