Percussion hydraulic apparatus

Details Percussion hydraulic apparatus Percussion hydraulic apparatus

2005-06-07

2005-06-07

Nguyen, Hoang (Department: 3748)

Motors: expansible chamber type

Cyclically operable

Working member controlled motive fluid for distributor motor

C091S290000, C091S303000, C091S327000

Reexamination Certificate

active

06901842

ABSTRACT:
The invention concerns an apparatus comprising a body (1) containing a cylinder wherein is mounted sliding an impact piston (1) of a tool, the motion of the piston being controlled by a distributor (15) which, arranged coaxial to the impact piston, is mounted inside a distribution box (3). The distribution box (3) comprises a part axially overlapping the piston (1) and arranged concentric thereto, and the distribution box (3) defines with the piston a control chamber (13) which, successively put under the high (9) and the low (12) pressure of the fluid, communicates through a passage (16) arranged in the distribution box (3) with a chamber controlling (14) the movement of the distributor (15), to generate alternately low pressure and high pressure.

REFERENCES:
patent: 4022108 (1977-05-01), Juvonen
patent: 4230019 (1980-10-01), Castejon Castan
patent: 4635531 (1987-01-01), Rode
patent: 5392865 (1995-02-01), Piras
patent: 5669281 (1997-09-01), Comarmond
patent: 2 045 289 (1971-02-01), None
patent: 2 369 908 (1978-06-01), None

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