Impact device

Details Impact device Impact device

1994-03-09

1995-12-26

Rada, Rinaldi I.

Tool driving or impacting

Drive controlled by relative axial movement of tool

Drive motor controlled

173206, 92 6R, B25D 926, B25D 904

Patent

active

054779324

ABSTRACT:
An impact device includes a cylinder and a plunger which is received within the cylinder and movable in forward and rearward directions. The plunger includes a first and a second pressure receiving surface for receiving pressure of a pressurized fluid so as to apply force to the plunger in the forward and rearward directions, respectively. An additional pressure receiving surface is formed on the plunger for receiving the pressure from the pressurized fluid so as to apply force in the same direction as one of the first and second pressure receiving surfaces. A first control device is operable to selectively apply the pressure of the pressurized fluid to the additional pressure receiving surface.

REFERENCES:
patent: 3170379 (1965-02-01), Dempster
patent: 3892279 (1975-07-01), Amtsberg
patent: 4784228 (1988-11-01), Ito
patent: 4817737 (1989-04-01), Hamada et al.
patent: 4951757 (1990-08-01), Hamada et al.
patent: 5134989 (1992-08-01), Akahane

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