Power plants – Pressure fluid source and motor – Pulsator
Reexamination Certificate
2006-02-28
2006-02-28
Look, Edward K. (Department: 3745)
Power plants
Pressure fluid source and motor
Pulsator
C060S570000
Reexamination Certificate
active
07003953
ABSTRACT:
A drive device for closing unit, injection unit or ejectors of a plastics injection molding machine, has a drive element which is axially moveable, and a hydraulic unit which is moveable by the drive element in the same direction as the drive element. The hydraulic unit is a force multiplier with a large piston and a first small piston, which are moveable in relation to one another and differ in size of their effective surface areas. An intermediate part together with the pistons encloses a pressure chamber filled with a pressure fluid. The first small piston is mechanically connected to the drive element. A second small piston with the intermediate part define a fluid chamber connected by a valve, in one embodiment, to the pressure chamber. The hydraulic unit as a whole is moveable for the positioning movement and the intermediate part is blockable against displacement in relation to a fixed frame.
REFERENCES:
patent: 2473803 (1949-06-01), La Brie
patent: 4030299 (1977-06-01), Reuschel et al.
patent: 4499728 (1985-02-01), Therond
patent: 5261810 (1993-11-01), Kamp et al.
patent: 5345766 (1994-09-01), Leonhartsberger et al.
patent: 6439875 (2002-08-01), Morita et al.
patent: 4111594 (1992-10-01), None
patent: 9211993 (1992-07-01), None
patent: 0189801 (2001-11-01), None
patent: 02096617 (2002-12-01), None
Patent Abstracts of Japan vol. 018, No. 636 (M-1715) Dec. 5, 1994 -& JP 06 246805 A (Meiki Co. LTD), Sep. 6, 1994.
Patent Abstracts of Japan vol. 2000, No. 15. Apr. 6, 2001 -& JP 2000 334799 A (Mitsubishi Heavy IND LTD) Dec. 5, 2000.
Bosch Rexroth AG
Farber Martin A.
Leslie Michael
Look Edward K.
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