Expansible chamber devices – Piston
Patent
1992-03-12
1994-07-19
Look, Edward K.
Expansible chamber devices
Piston
91462, 2989012, 1371163, 13767569, 219 6912, 219 6917, F16J 100, B23H 100
Patent
active
053298411
ABSTRACT:
A piston-slide valve including a housing in which a piston with at least one oil groove and control edge is guided shiftable or slidable in a bore characterized thereby that the oil groove of the piston is manufactured via wire erosion. Also the control edges of the piston are manufactured by wire erosion. The bore of the sleeve bushing is manufactured by wire erosion. The piston is made out of a needle roller. The piston has a length of approximately 13 mm and a diameter of approximately 2 mm. The wire for eroding of the piston as well as the sleeve bushing has a diameter of approximately 2/10 mm. Longitudinal sides of a multiple edged groove base or bottom of the oil groove of the piston and control edges therewith are formed in a first working step procedure and the remaining longitudinal edges of the oil groove and the remaining control edges are formed in a further working step. The piston occupies one position and another working position displaced by 900.degree. from each other. Several needle rollers arranged in a multiple compartment holding device are produced via wire erosion in common with each other. During the machining or working of the bore of the bushing sleeve, the bushing sleeve is erodible with a wire with at least one further identical bushing sleeve in common therewith in one working step.
REFERENCES:
patent: 2295111 (1942-09-01), Hemmings
patent: 3052013 (1962-09-01), Kane
patent: 3562702 (1971-02-01), Celovsky
patent: 3975609 (1976-08-01), Martin et al.
patent: 4345138 (1982-08-01), Zammert
patent: 4862920 (1989-09-01), Cleasby
patent: 4941508 (1990-07-01), Hennessy et al.
patent: 4983803 (1991-01-01), Pringle et al.
Meyer Roland
Sauer Axel
Hydraulik-Ring GmbH
Look Edward K.
Nguyen Hoang
Reuther Albert H.
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