Power plants – Pressure fluid source and motor – Ram driven by fluid pumped from reservoir
Reexamination Certificate
2006-09-05
2006-09-05
Kershteyn, Igor (Department: 3745)
Power plants
Pressure fluid source and motor
Ram driven by fluid pumped from reservoir
C030S228000
Reexamination Certificate
active
07100373
ABSTRACT:
A hydraulic tool is provided with a spool valve24for changing the flow of a working fluid pressurized by a hydraulic power generating mechanism in a hydraulic circuit. The spool valve24is slidable in directions perpendicular to a piston rod18. A cylindrical grip handle34to be operated by the operator's hand is extended parallel to the piston rod18on the outer surface of the main casing5so as to be turnable about its own axis. The spool valve24and the grip handle34are interlocked by a cam mechanism including members29, 30and21. The spool valve24is moved axially by turning the grip handle34to control the flow direction of the working fluid.
REFERENCES:
patent: 2446011 (1948-07-01), Johnson et al.
patent: 3819153 (1974-06-01), Hurst et al.
patent: 4369576 (1983-01-01), McVaugh
patent: 5209153 (1993-05-01), Araki et al.
patent: 5272811 (1993-12-01), Armand
patent: D386661 (1997-11-01), Hirabayashi et al.
patent: 5953822 (1999-09-01), Vogelsanger
patent: 6108867 (2000-08-01), Nagashima
patent: 6457243 (2002-10-01), Kimura
patent: 01-295710 (1989-11-01), None
patent: 07-148610 (1995-06-01), None
patent: 07-241720 (1995-09-01), None
patent: 11-028683 (1999-02-01), None
patent: 2000-273967 (2000-10-01), None
Dickstein , Shapiro, Morin & Oshinsky, LLP
Kabushiki Kaisha Ogura
Kershteyn Igor
LandOfFree
Hydraulic tool does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic tool will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3595589