Reversible percussive action machine

Details Reversible percussive action machine Reversible percussive action machine

1984-06-05

1986-12-16

Schran, Donald R.

Tool driving or impacting

Impacting devices

Selective axial direction of impact

175 19, E21B 1102

Patent

active

046290087

ABSTRACT:
A reversible percussive action machine comprises a housing which accommods a hammer capable of reciprocating motions under the action of a pressurized fluid, and a fluid valving member for controlling the distribution of fluid with parts for fixing it in two fluid control positions to assure either the forward or rearward percussive action of the machine. To fix the fluid valving member to provide for the forward percussive action of the machine, a spring-loaded insert which is movably secured relative to the valving member and engageable with a stop made in the housing is used. To fix the fluid valving member in a position to provide for the rearward percussive action of the machine, a stop made on the inside wall of the housing and a stop made in the valving member to engage with the stop of the housing is used. The insert is fashioned as a cup accommodating an element imparting a spring action on the cup relative to the fluid valving member.

REFERENCES:
patent: 2729228 (1956-01-01), Stevenson
patent: 3744576 (1973-07-01), Sudnishnikov et al.
patent: 4078619 (1978-03-01), Sudnishnikov et al.
patent: 4370102 (1983-01-01), Sasaki et al.

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