Fluid-pressure and analogous brake systems – With pump – Pressure control
Patent
1993-03-10
1994-11-29
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
With pump
Pressure control
303 20, 188109, B60T 714, B60T 1318, B60T 1320
Patent
active
053683722
ABSTRACT:
A brake system for off-road vehicles of the type including an operator seat, a brake pedal and a hydraulic brake responsive to operator actuation on the brake pedal. The brake system includes a tank for hydraulic fluid, an electric pump hydraulically connected to the tank, a pressure modulating valve actuated by the brake pedal and a flow control valve for controlling the flow of pressurized hydraulic fluid between the pump, pressure modulating valve and brake. During normal braking operation, a switch responsive to operator actuation of the brake pedal causes to provide pressurized hydraulic fluid to the brake through the flow control valve. The return flow of pressurized fluid to the tank is modulated by the pressure modulating valve in response to operator actuation of the brake pedal to control the braking pressure. The flow control valve is responsive to the presence of an operator in the operator compartment, and is coupled to a switch. In the event an unoccupied seat condition is sensed, the switch actuates the pump, and the flow control valve is switched to a flow path which routes all the pressurized fluid to the brake. The brake is thereby automatically actuated when an unoccupied seat condition is sensed. The pressure modulating valve also includes a secondary fail-safe chamber which is actuated by the brake pedal to supply hydraulic fluid to the brake during a fail-safe mode when the pump is not operating.
REFERENCES:
patent: Re30550 (1981-03-01), Reise
patent: 772654 (1904-10-01), Fraser
patent: 3332522 (1967-07-01), Dence
patent: 3342292 (1967-09-01), Wherry
patent: 3360305 (1967-12-01), Ryskamp
patent: 3682278 (1972-08-01), Wherry
patent: 3788431 (1974-01-01), York
patent: 3796287 (1974-03-01), Kolm
patent: 3881577 (1975-05-01), Wherry et al.
patent: 3951464 (1976-04-01), Donahue et al.
patent: 3989270 (1976-11-01), Henderson
patent: 3995911 (1976-12-01), Kasselmann et al.
patent: 4196936 (1980-08-01), Snyder
patent: 4223766 (1980-09-01), Huetsch et al.
patent: 4239252 (1980-12-01), Huetsch et al.
patent: 4243271 (1981-01-01), Dwyer
patent: 4249643 (1981-02-01), Yoder
patent: 4343517 (1982-08-01), Levington
patent: 4402553 (1983-09-01), Hipps
patent: 4453620 (1984-06-01), Angus et al.
patent: 4600089 (1986-07-01), Wilson
patent: 4635758 (1987-01-01), Beard, Jr.
patent: 4671578 (1987-06-01), Rothen et al.
patent: 4735463 (1988-04-01), Rhoton et al.
patent: 4787487 (1988-11-01), Conradi
patent: 4840256 (1989-06-01), Webb
patent: 4842340 (1989-06-01), Kullmann et al.
patent: 4899642 (1990-02-01), Hwang
patent: 4993738 (1991-02-01), Bennett
patent: 5036956 (1991-08-01), Genier
patent: 5040816 (1991-08-01), Goettker
patent: 5051053 (1991-09-01), Groeneweg
Hydro-Act Model TA-6 Hydraulic Trailer Brak Actuators, Toledo Stamping & Manufacturing Co. (2 pages) Jun. 5, 1992.
Hydro Braking--Act "TB" Series Hydraulic Trailer Brake Actuators, Toledo Stamping & Manufacturing Co. (3 pages) Prior to Mar. 10, 1993.
Cords Frederick W.
Frye David
Muratori Alfred
Oberleitner Robert J.
Total Quality Enterprises, Inc.
LandOfFree
Hydraulic brake system for an off-road vehicle 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 brake system for an off-road vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic brake system for an off-road vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-69872