Hydrostatic transmission controls to simulate gear drive

Details Hydrostatic transmission controls to simulate gear drive Hydrostatic transmission controls to simulate gear drive

2008-05-20

2008-05-20

Leslie, Michael (Department: 3745)

Power plants

Pressure fluid source and motor

Servo-motor having externally operated control valve sets...

C060S368000

Reexamination Certificate

active

11299036

ABSTRACT:
A control apparatus is provided for a hydrostatic transmission to simulate a gear drive on a tractor. The hydrostatic transmission has a swashplate that is angularly movable to a plurality of positions, and a proportional valve that provides a control pressure to a servo piston to control the hydrostatic transmission swashplate position. A transmission control lever may be moved to a plurality of positions, each position providing a different voltage signal to a microcontroller. The microcontroller receives and converts a voltage signal to a coil current to actuate the proportional valve.

REFERENCES:
patent: 3579988 (1971-05-01), Firth et al.
patent: 3927528 (1975-12-01), Van Der Kolk et al.
patent: 3969896 (1976-07-01), Louis
patent: 4546664 (1985-10-01), Mylander
patent: 4594666 (1986-06-01), Cornell
patent: 4648040 (1987-03-01), Cornell et al.
patent: 6022292 (2000-02-01), Goodnight
patent: 6247378 (2001-06-01), Newendorp et al.
patent: 6298939 (2001-10-01), Heindl et al.
patent: 6305164 (2001-10-01), Yamamoto et al.
patent: 6381529 (2002-04-01), Mistry
patent: 6470771 (2002-10-01), Nanri et al.
patent: 6655233 (2003-12-01), Evans et al.
patent: 2007/0130931 (2007-06-01), Burgart et al.
Deere Manual for 7220, 7320, 7420, and 7520 Tractors: Revolutionary John Deere Infinitely Variable Transmission (IVT) for Better Operator Control and Increased Productivity, Oct. 4, 2002, [online], [retrieved on Oct. 30, 2002]. Retrieved from the Internet: <URL: http://products.deere.com/Deere/agsales/asm/s2/7020/7020st16.htm>.
Deere Manual for 450H/550H Crawler Dozers: FNR with Transmission Speed In Grip-If Equipped, 2001, [online], [retrieved on Oct. 30, 2002]. Retrieved from the Internet: <URL: http://manuals.deere.com/omview/OMT179658—19/html>.
Deere Manual for 450H/550H Crawler Dozers: Foot Pedals, 2001, [online], [retrieved on Oct. 30, 2002]. Retrieved from the Internet: <URL: http://manuals.deere.com/omview/OMT179658—19/html>.
Deere Manual for 304H Loader: Shifting the Machine, 2001, [online], [retrieved on Oct. 30, 2002]. Retrieved from the Internet: <URL: http://manuals.deere.com/omview/OMT184550—19/html>.
Deere Manual for 450H/550H Crawler Dozers: Forward-Neutral-Reverse Control Lever (FNR), 2001, [online], [retrieved on Oct. 30, 2002], Retrieved from the Internet: <URL: http://manuals.deere.com/omview/OMT179658—19/html>.
Deere Manual for 7220, 7320, 7420, and 7520 Tractors: Revolutionary John Deere Infinitely Variable Transmission (IVT) for Better Operator Control and Increased Productivity, Oct. 4, 2002, [online], [retrieved on Oct. 30, 2002]. Retrieved from the Internet: <URL: http://products.deere.com/Deere/agsales/asm/s2/7020/7020st16.htm>.
Deere Specifications for 304H, 324H, and 344H Loaders (2002).
Deere Manual for 6000 Series Tractor, p. 45-18, Feb. 2002.

Affiliated with

Also associated with

Rating

Hydrostatic transmission controls to simulate gear drive does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydrostatic transmission controls to simulate gear drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrostatic transmission controls to simulate gear drive will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3911124