US3849985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for multiple motor hydraulic means
Assignee: TYRONE HYDRAULICS INC US
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Filing: 1972-12-04
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Granted: 1974-11-26
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Expires: 1992-12-04
Abstract
Abstract A control system for hydraulic power means incorporating two motors. The control system provides for alternative operation of one motor or of both motors and for transition between one motor and two motor operation without abrupt change and without passing through a neutral condition in which neither mode of operation is in effect.
Inventors
- 👤 F Ratliff
- 👤 J Mcburnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:14
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/02; B66D1/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
290 words
A fluid control system for power means having first and second hydraulic motors connected to deliver power to a power shift and each of said motors having first and second passages extended from opposite sides thereof for supply and discharge of operating fluid, the control system comprising first and second valve devices each having first and second cavities and a valve seat around a port interconnecting the first and second cavities, the first and secOnd cavities of the first valve device being connected respectively with the first passages of the two motors and the first and second cavities of the second valve device being connected respectively with the second passages of the two motors, and each of said devices having a valve cooperating with said seat and movable to open and close said port, first connection means providing for connection of the first cavity of the first valve device with a source of hydraulic operating fluid, second connection means providing for connection of the first cavity of the second valve device with reservoir, said two valve devices providing for operation of only the first motor when the two valves are closed and for operation of both motors when the two valves are open, each of said valve devices having fluid pressure means for operating the valves including a pressure fluid chamber at that side of the valve acting to move the valve against the valve seat and thereby close the port upon build-up of pressure in said pressure fluid chamber, each valve device having a restricted orifice interconnecting said first cavity thereof and its fluid pressure valve operating chamber, and each valve having a discharge line with a restricted orifice for connecting its fluid pressure valve operating chamber with reservoir.
Claim 2
Dependent Claim
290 words
A fluid control system for power means having first and second hydraulic motors connected to deliver power to a power shift and each of said motors having first and second passages extended from opposite sides thereof for supply and discharge of operating fluid, the control system comprising first and second valve devices each having first and second cavities and a valve seat around a port interconnecting the first and second cavities, the first and secOnd cavities of the first valve device being connected respectively with the first passages of the two motors and the first and second cavities of the second valve device being connected respectively with the second passages of the two motors, and each of said devices having a valve cooperating with said seat and movable to open and close said port, first connection means providing for connection of the first cavity of the first valve device with a source of hydraulic operating fluid, second connection means providing for connection of the first cavity of the second valve device with reservoir, said two valve devices providing for operation of only the first motor when the two valves are closed and for operation of both motors when the two valves are open, each of said valve devices having fluid pressure means for operating the valves including a pressure fluid chamber at that side of the valve acting to move the valve against the valve seat and thereby close the port upon build-up of pressure in said pressure fluid chamber, each valve device having a restricted orifice interconnecting said first cavity thereof and its fluid pressure valve operating chamber, and each valve having a discharge line with a restricted orifice for connecting its fluid pressure valve operating chamber with reservoir.
Claim 3
Dependent Claim
23 words
A fluid control system as defined in claim 1 and further including a master control valve for opening and closing said discharge lines.
Claim 4
Dependent Claim
59 words
A fluid control system as defined in claim 2 and further including a discharge connection for delivering pressure fluid from the second cavities of said valve devices to reservoir, and means operated by said master valve for opening said discharge connection when the master valve is operated to close the discharge lines from the fluid pressure valve operating chambers.
Claim 5
Dependent Claim
79 words
A fluid control system as defined in claim 1 and further including means for inverting the connections with the source of hydraulic operating fluid and with the reservoir so that the first connection means connects the first cavity of the first valve device with reservoir and so that the second connection means connects the first cavity of the second valve device with the source of supply of hydraulic operating fluid, and thereby provides for reverse operation of the motors.
Claim 6
Dependent Claim
243 words
A fluid control system for power means having first and second hydraulic motors connected to deliver power to a power shaft and each of said motors having first and second passages extended from opposite sides thereof for supply and discharge of operating fluid, the control system comprising a valve device having first and second cavities and a valve seat around a port interconnecting the first and second cavities, the first and second cavities of the valve device being connected respectively with the first passages of the two motors, and the valve device having a valve cooperating with said seat and movable to open and close said port, first connection means providing for connection of the first cavity of the valve device with a source of hydraulic operating fluid, said valve device providing for supply of operating fluid to only the first motor when the valve is closed, and for operation of both motors when the valve is open, the valve device having fluid pressure means for operating its valve including a pressure fluid chamber at that side of the valve acting to move the valve against the valve seat and thereby close the port upon build-up of pressure in said pressure fluid chamber, the valve device having a restricted orifice interconnecting said first cavity thereof and its fluid pressure valve operating chamber, and the valve having a discharge line with a restricted orifice for connecting its fluid pressure valve operating chamber with reservoir.
Claim 7
Dependent Claim
243 words
A fluid control system for power means having first and second hydraulic motors connected to deliver power to a power shaft and each of said motors having first and second passages extended from opposite sides thereof for supply and discharge of operating fluid, the control system comprising a valve device having first and second cavities and a valve seat around a port interconnecting the first and second cavities, the first and second cavities of the valve device being connected respectively with the first passages of the two motors, and the valve device having a valve cooperating with said seat and movable to open and close said port, first connection means providing for connection of the first cavity of the valve device with a source of hydraulic operating fluid, said valve device providing for supply of operating fluid to only the first motor when the valve is closed, and for operation of both motors when the valve is open, the valve device having fluid pressure means for operating its valve including a pressure fluid chamber at that side of the valve acting to move the valve against the valve seat and thereby close the port upon build-up of pressure in said pressure fluid chamber, the valve device having a restricted orifice interconnecting said first cavity thereof and its fluid pressure valve operating chamber, and the valve having a discharge line with a restricted orifice for connecting its fluid pressure valve operating chamber with reservoir.
Claim 8
Dependent Claim
172 words
A fluid control system for power means having first and second hydraulic motors connected to deliver power to a power shaft and each having passages extended therefrom for supply and discharge of operating fluid, the control systeM comprising supply and discharge valve means providing alternatively for operation of the first motor only and for operation of both motors, and including a valve adapted in a first position to shut off the fluid with respect to one motor and a second position to establish a fluid flow with respect to both motors, and control mechanism for said valve comprising fluid pressure means for shifting said valve between said two positions and comprising a fluid pressure control chamber having a supply connection and a discharge connection, and a controllable valve in one of said connections having two operating positions providing alternatively for build-up and discharge of pressure in said chamber, each of said supply and discharge connections having a restriction therein providing respectively for retarded build-up and discharge of pressure in the control chamber.
Claim 9
Dependent Claim
172 words
A fluid control system for power means having first and second hydraulic motors connected to deliver power to a power shaft and each having passages extended therefrom for supply and discharge of operating fluid, the control systeM comprising supply and discharge valve means providing alternatively for operation of the first motor only and for operation of both motors, and including a valve adapted in a first position to shut off the fluid with respect to one motor and a second position to establish a fluid flow with respect to both motors, and control mechanism for said valve comprising fluid pressure means for shifting said valve between said two positions and comprising a fluid pressure control chamber having a supply connection and a discharge connection, and a controllable valve in one of said connections having two operating positions providing alternatively for build-up and discharge of pressure in said chamber, each of said supply and discharge connections having a restriction therein providing respectively for retarded build-up and discharge of pressure in the control chamber.
Claim 10
Dependent Claim
213 words
A fluid control system for power means having first and second hydraulic motors connected to deliver power to a power shaft and each having passages extended therefrom for supply and discharge of operating fluid, the control system comprising supply and discharge valve means providing alternatively for operation of the first motor only and for operation of both motors, and including valve chambers respectively connected with the supply passages for the two motors and one of which is a pressure fluid supply chamber, a port between the valve chambers, a control valve for opening and closing said port and thereby provide alternatively for supply of pressure fluid to one motor and to both motors, said valve also having means cooperating with said port to provide metering grooves for restricting flow from the pressure fluid supply chamber to the other chamber during opening and closing movement of the valve, and means for actuating said control valve including a fluid pressure control chamber having a supply connection and a discharge connection, and a manually controllable valve in one of said connections providing alternatively for build-up and discharge of pressure in said chamber, each of said supply and discharge connections having a restriction therein providing respectively for retarded build-up and discharge of pressure in the control chamber.
Claim 11
Dependent Claim
213 words
A fluid control system for power means having first and second hydraulic motors connected to deliver power to a power shaft and each having passages extended therefrom for supply and discharge of operating fluid, the control system comprising supply and discharge valve means providing alternatively for operation of the first motor only and for operation of both motors, and including valve chambers respectively connected with the supply passages for the two motors and one of which is a pressure fluid supply chamber, a port between the valve chambers, a control valve for opening and closing said port and thereby provide alternatively for supply of pressure fluid to one motor and to both motors, said valve also having means cooperating with said port to provide metering grooves for restricting flow from the pressure fluid supply chamber to the other chamber during opening and closing movement of the valve, and means for actuating said control valve including a fluid pressure control chamber having a supply connection and a discharge connection, and a manually controllable valve in one of said connections providing alternatively for build-up and discharge of pressure in said chamber, each of said supply and discharge connections having a restriction therein providing respectively for retarded build-up and discharge of pressure in the control chamber.
Claim 12
Dependent Claim
187 words
A fluid control system for power means having a plurality of hydraulic motors connected to deliver power to a power shaft and each of said motors having passages extended therefrom for supply of operating fluid and for discharge of operating fluid to reservoir, the control system comprising supply and discharge valve means providing alternatively for operation of one motor only and for operation of more than one motor, and including a valve adapted in a first position to shut off the fluid flow with respect to all but one motor and a second position to establish fluid flow with respect to more than one motor, the control system further including manually controllable means for effecting movement of said valve between its first position and its second position, and for each motor means providing for discharge of operating fluid from any inactive motor to reservoir independently of the discharge from an active motor, and thus for operation of any inactive motor in the absence of pressure fluid at times when the valve is in its position to shut off fluid flow with respect to more than one motor.
Claim 13
Dependent Claim
187 words
A fluid control system for power means having a plurality of hydraulic motors connected to deliver power to a power shaft and each of said motors having passages extended therefrom for supply of operating fluid and for discharge of operating fluid to reservoir, the control system comprising supply and discharge valve means providing alternatively for operation of one motor only and for operation of more than one motor, and including a valve adapted in a first position to shut off the fluid flow with respect to all but one motor and a second position to establish fluid flow with respect to more than one motor, the control system further including manually controllable means for effecting movement of said valve between its first position and its second position, and for each motor means providing for discharge of operating fluid from any inactive motor to reservoir independently of the discharge from an active motor, and thus for operation of any inactive motor in the absence of pressure fluid at times when the valve is in its position to shut off fluid flow with respect to more than one motor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |