Power plants – Pressure fluid source and motor – Input pump and rotary output motor system having...
Patent
1998-04-08
2000-08-29
Lopez, F. Daniel
Power plants
Pressure fluid source and motor
Input pump and rotary output motor system having...
F16D 3102
Patent
active
061090344
ABSTRACT:
To control transmission ratio of a continuously variable hydrostatic transmission including an input shaft, an output shaft, a hydraulic pump unit driven by the input shaft, a grounded hydraulic motor unit, and a wedge-shaped swashplate drivingly, pivotally connected to the output shaft and positioned to accommodate pumped hydraulic fluid exchanges between the pump and motor units. A ratio controller is provided having a pair of hydraulically actuated, differentially sized pistons coupled by a linkage mechanism to pivot the swashplate in opposite transmission ratio-changing directions. The smaller piston is incorporated internally of the output shaft, while the larger piston, of an annular shape, coaxially surrounds the output shaft. The linkage mechanism has geometry effective to translate axial forces exerted by the pistons into amplified ratio-changing moments exerted on the swashplate. The ratio controller also includes a control valve selectively positioned to change the hydraulic fluid pressure acting on the larger piston, such as to set a transmission ratio and also to determine the ratio-changing direction of swashplate pivotal motion.
REFERENCES:
patent: 1648000 (1927-11-01), Lee
patent: 1840866 (1932-01-01), Rayburn et al.
patent: 2788636 (1957-04-01), Badalini
patent: 2832198 (1958-04-01), Pichon
patent: 3175363 (1965-03-01), Molly
patent: 3204411 (1965-09-01), Stockton
patent: 3291068 (1966-12-01), Wiggerman
patent: 3313108 (1967-04-01), Allgaier et al.
patent: 3364680 (1968-01-01), Ososnak
patent: 3406608 (1968-10-01), Diedrich
patent: 3522704 (1970-08-01), Martin
patent: 3602105 (1971-08-01), Slusher
patent: 3654761 (1972-04-01), Eickmann
patent: 3740954 (1973-06-01), Young
patent: 3834164 (1974-09-01), Ritter
patent: 4355506 (1982-10-01), Leonard
patent: 4493189 (1985-01-01), Slater
patent: 4495768 (1985-01-01), Valavaara
patent: 4815327 (1989-03-01), Drevet
patent: 4896585 (1990-01-01), Forster
patent: 4901529 (1990-02-01), Iino
patent: 5269142 (1993-12-01), Atake
patent: 5423183 (1995-06-01), Folsom
patent: 5486142 (1996-01-01), Folsom
patent: 5493862 (1996-02-01), Folsum
patent: 5524437 (1996-06-01), Larkin et al.
patent: 5531072 (1996-07-01), Larkin et al.
patent: 5535589 (1996-07-01), Folsom
patent: 5678405 (1997-10-01), Folsom
General Dynamics Land Systems Inc.
Lopez F. Daniel
LandOfFree
Continuously variable hydrostatic transmission ratio controller does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuously variable hydrostatic transmission ratio controller , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuously variable hydrostatic transmission ratio controller will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1236716