Motors: expansible chamber type – Cyclically operable – Working member controlled motive fluid for distributor motor
Reexamination Certificate
2007-07-03
2007-07-03
Kershteyn, Igor (Department: 3745)
Motors: expansible chamber type
Cyclically operable
Working member controlled motive fluid for distributor motor
C417S397000, C137S625600
Reexamination Certificate
active
11176412
ABSTRACT:
A fluid power unit has a cylinder in a housing, a piston slidable in the cylinder and dividing the cylinder into a retract side and an extend side, and a two-position control valve. The control valve has a spool and first and second pilots. The position of the spool is responsive to the first and second pilots. There is a retract poppet valve in the retract side of the cylinder, and an extend poppet valve in the extend side. The retract and extend poppet valves are biased to a closed position. The retract poppet valve is in a fluid path between the retract side and the control valve; the extend poppet valve is in a fluid path between the extend side and the control valve. The alternate movement of the piston in the cylinder alternately opens and closes the poppet valves, The circuit connects the poppet valves to the pilots and alternately applies and releases pressure to the pilots, causing the spool of the control valve to shift and apply inlet pressure to the piston on alternate sides. Thus the piston oscillates as long as inlet pressure is applied. All the fluid paths and the poppet valves are fluidly sealed inside the housing, so no gas is vented to the atmosphere.
REFERENCES:
patent: 217952 (1879-07-01), Neff
patent: 1406330 (1922-02-01), Barner
patent: 2296647 (1942-09-01), McCormick
patent: 3162093 (1964-12-01), Zoller
patent: 3282167 (1966-11-01), McKenzie
patent: 3555966 (1971-01-01), Coniglio
patent: 3780621 (1973-12-01), Romel
patent: 3800665 (1974-04-01), Von Ruden
patent: 3943823 (1976-03-01), Tammy
patent: 4050356 (1977-09-01), Jaggi et al.
patent: 4099450 (1978-07-01), Mase
patent: 4104008 (1978-08-01), Hoffmann et al.
patent: 4280396 (1981-07-01), Zeuner et al.
patent: 4846045 (1989-07-01), Grach et al.
patent: 5758862 (1998-06-01), Sturman
patent: 5787786 (1998-08-01), Zeuner
patent: 6516706 (2003-02-01), Porter et al.
patent: 6557332 (2003-05-01), Rhody
TEXSTEAM Inc., Series 6100, Gas or Air Driven Reciprocating Pumps, Specifications, 1996, 11 pages.
Burns Controls Company
Kershteyn Igor
Thomas John A.
LandOfFree
Fluid power unit having closed circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fluid power unit having closed circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid power unit having closed circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3818113