Motors: expansible chamber type – Cyclically operable – Working member controlled motive fluid for distributor motor
Patent
1995-06-02
1996-08-27
Nguyen, Hoang
Motors: expansible chamber type
Cyclically operable
Working member controlled motive fluid for distributor motor
91290, 91303, 91304, 91319, 173169, 173206, F01L 2502, B23B 4504
Patent
active
055490310
ABSTRACT:
A device for distributing oil under pressure including a head (2) within which, inside a chamber (24), a shuttle (5) slides provided with a shank (5a) sealingly sliding within an end cap (6) and on whose head surface (19) oil at the feed pressure acts coming from a switch duct (18). The head (2) is provided with a feed hole (8) connected to the chamber (24) and is closed at the other end by a shutter (7) connected to a drain hole (9), while the shuttle (5) is provided with an inner cavity (26) and end ducts (25) and it is shaped so as to have in the chamber (24) opposite transverse surfaces (22, 23) whose difference of area in favour of the surface (23) at the end where the shank (5a) is located is smaller than the area of the head (19) of the latter. A hydraulic hammer including the device is provided with a pair of outflow orifices (17, 20) located so that the first orifice (17) is uncovered by the ram (4) at the end of the return travel and the second orifice (20) at the end of the descending travel.
REFERENCES:
patent: 614160 (1898-11-01), Breitenstein
patent: 3490549 (1970-01-01), Catterson
patent: 3701386 (1972-10-01), Feucht
patent: 3908767 (1975-09-01), Klemm
patent: 4852664 (1989-08-01), Terada et al.
patent: 5038668 (1991-08-01), Arndt et al.
Nguyen Hoang
Officine Giordano S.R.L.
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