Hydraulic control system

Claim 2

A hydraulic control system for operating and controlling equipment including, a remote control valve bank, a cylinder, a piston operatively connected to said equipment and being mounted for reciprocating movement in said cylinder, tube means connecting the remote valve bank to the cylinder for the transmission of hydraulic fluid from the valve bank to and from such cylinder for movement of the piston, said tube means being further defined as including, two tubes, each connecting the remote valve bank to the cylinder on opposite sides of said piston, whereby fluid may flow into and exit from the cylinder as the piston moves in either direction, valve means connected to at least one of said tubes adjacent the cylinder for diverting out of said one tube fluid flowing from from the cylinder, tank means for the storage and supply of hydraulic fluid to the remote valve bank, and a return line connecting said valve means to said tank means for the return to said tank means of fluid diverted from said one tube.

Claim 3

A hydraulic control system for operation and controlling equipment including, a remote control valve bank, a cylinder, a piston operatively connected to said equipment and being mounted for reciprocating movement in said cylinder, tube means connecting the remote valve bank to the cylinder for the transmission of hydraulic fluid to and from such cylinder for movement of the piston, said tube means being further defined as including, two tubes, each connecting the remove valve bank to the cylinder on opposite sides of said piston, whereby fluid may flow into and exit from the cylinder as the piston moves in either direction, valve means connected to each of said tubes adjacent the cylinder for diverting out of its respective tube fluid flowing from the cylinder, each of said valve means further including, a valve in each of said tubes, each of said valves having first, second and third ports in fluid communication with each other, and a spool normally seating against and sealing the first port, and having a second position in which it seats against and seals the second port.

Claim 4

A hydraulic control system for operation and controlling equipment including, a remote control valve bank, a cylinder, a piston operatively connected to said equipment and being mounted for reciprocating movement in said cylinder, tube means connecting the remote valve bank to the cylinder for the transmission of hydraulic fluid to and from such cylinder for movement of the piston, said tube means being further defined as including, two tubes, each connecting the remove valve bank to the cylinder on opposite sides of said piston, whereby fluid may flow into and exit from the cylinder as the piston moves in either direction, valve means connected to each of said tubes adjacent the cylinder for diverting out of its respective tube fluid flowing from the cylinder, each of said valve means further including, a valve in each of said tubes, each of said valves having first, second and third ports in fluid communication with each other, and a spool normally seating against and sealing the first port, and having a second position in which it seats against and seals the second port.

Claim 5

A hydraulic control system for operating and controlling equipment including, a remote control valve bank, a cylinder, a piston operatively connected to said equipment and being mounted for reciprocating movement in said cylinder, tube means connecting the remote valve bank to the cylinder for the transmission of hydraulic fluid from the valve bank to and from such cylinder for movement of the piston, said tube means being further defined as including, two tubes, each connecting the remote valve bank to the cylinder on opposite sides of said piston, whereby fluid may flow into and exit from the cylinder as the piston moves in either direction, valve means connected to each of said tubes adjacent the cylinder for diverting out of its respective tube fluid flowing from the cylinder, tank means for the storage and supply of hydraulic fluid to the remote control valve bank, and return lines connecting each of said valve means to said tank means for the return to said tank means of fluid diverted from said tubes.

Claim 6

A hydraulic control system for operating and controlling equipment including, a remote control valve bank, a cylinder, a piston operatively connected to said equipment and being mounted for reciprocating movement in said cylinder, tube means connecting the remote valve bank to the cylinder for the transmission of hydraulic fluid from the valve bank to and from such cylinder for movement of the piston, said tube means being further defined as including, two tubes, each connecting the remote valve bank to the cylinder on opposite sides of said piston, whereby fluid may flow into and exit from the cylinder as the piston moves in either direction, valve means connected to each of said tubes adjacent the cylinder for diverting out of its respective tube fluid flowing from the cylinder, tank means for the storage and supply of hydraulic fluid to the remote control valve bank, and return lines connecting each of said valve means to said tank means for the return to said tank means of fluid diverted from said tubes.

Claim 7

A hydraulic control system including, a slave cylinder having a piston, a remote control valve bank, a fluid source and means to supply hydraulic fluid under pressure to said remote bank, tube means connecting the remote bank, said tube means being further defined as including, a first tube means connecting the remote bank to the cylinder on one side of said piston, and a second tube means connecting the remote bank to the cylinder on the opposite side of said piston, and valve means located in each of said tube means adjacent said cylinder for diverting hydraulic fluid flowing from the cylinder out of the tube means, said valve means being further defined as including, a valve on each of said first and second tube means to allow fluid flowing from the cylinder to exit from the tube means, each of said valves being comprised of, a valve body having first, second and third ports communicating with an inner valve chamber, a spool slidably mounted within said chamber and having at least two positions within said chamber, said first port being closed and the second and third ports being in communication when the spool is in its first position; and said second port being closed and the first and third ports being in communication when the spool is in its second position.

Claim 8

A hydraulic control system including, a slave cylinder having a piston, a remote control valve bank, a fluid source and means to supply hydraulic fluid under pressure to said remote bank, tube means connecting the remote bank, said tube means being further defined as including, a first tube means connecting the remote bank to the cylinder on one side of said piston, and a second tube means connecting the remote bank to the cylinder on the opposite side of said piston, and valve means located in each of said tube means adjacent said cylinder for diverting hydraulic fluid flowing from the cylinder out of the tube means, said valve means being further defined as including, a valve on each of said first and second tube means to allow fluid flowing from the cylinder to exit from the tube means, each of said valves being comprised of, a valve body having first, second and third ports communicating with an inner valve chamber, a spool slidably mounted within said chamber and having at least two positions within said chamber, said first port being closed and the second and third ports being in communication when the spool is in its first position; and said second port being closed and the first and third ports being in communication when the spool is in its second position.

Claim 9

The invention of claim 4, wherein, the first port in said valves is connected in fluid communication with the remote bank by said tube means, the second port in each of said valves being connected in fluid communication to said supply means, said third port being in fluid communication with said cylinder, and, the spool is biased against said first port, whereby said first port is normally closEd.

Claim 10

A hydraulic control system including, a slave cylinder having a piston, a remote control valve bank, a fluid source and means to supply hydraulic fluid under pressure to said remote bank, tube means connecting the remote bank, said tube means being further defined as including, a first tube means connecting the remote bank to the cylinder on one side of said piston, and a second tube means connecting the remote bank to the cylinder on the opposite side of said piston, and valve means located in each tube means adjacent said cylinder for diverting hydraulic fluid flowing from the cylinder out of its respective tube means, each valve means including a valve comprised of, first, second and third ports in fluid communication with each other, said first port being connected by said tube means to said remote bank for receiving hydraulic fluid, said second port being an outlet from said system, and, said third port being connected by said tube means to said cylinder for the transmission of fluid thereto and, a spool normally biased to seat against and close said first port and having a second position in which it seats against and closes said second port, the control system further including, conduit means other than said tube means connecting the second ports to the fluid source

Claim 11

A hydraulic control system including, a slave cylinder having a piston, a remote control valve bank, a fluid source and means to supply hydraulic fluid under pressure to said remote bank, tube means connecting the remote bank, said tube means being further defined as including, a first tube means connecting the remote bank to the cylinder on one side of said piston, and a second tube means connecting the remote bank to the cylinder on the opposite side of said piston, and valve means located in each tube means adjacent said cylinder for diverting hydraulic fluid flowing from the cylinder out of its respective tube means, each valve means including a valve comprised of, first, second and third ports in fluid communication with each other, said first port being connected by said tube means to said remote bank for receiving hydraulic fluid, said second port being an outlet from said system, and, said third port being connected by said tube means to said cylinder for the transmission of fluid thereto and, a spool normally biased to seat against and close said first port and having a second position in which it seats against and closes said second port, the control system further including, conduit means other than said tube means connecting the second ports to the fluid source

Claim 12

The invention of claim 6 wherein said spool is biased against said first port by a force which is less than the force exerted by the hydraulic fluid, whereby when fluid flows from said remote bank to one of said valves, the spool will be forced away from said first port.

Claim 13

The invention of claim 7 wherein the second position is further defined as the position assumed by said spool when forced away from said first port by the force exerted by the hydraulic fluid.

Claim 14

A hydraulic control system including, a slave cylinder having a piston, a remote control valve bank, a fluid source and means to supply hydraulic fluid under pressure to said remote bank, tube means the transmission of fluid from connecting the remote bank to the slave cylinder said tube means being further defined as including, a first tube means connecting the remote bank to the cylinder on one side of said piston, and a second tube means connecting the remote bank to the cylinder on the opposite side of said piston, and valve means located in one of said tube means adjacent said cylinder for diverting hydraulic fluid flowing from the cylinder out of said one tube means, tank means for the storage and supply of hydraulic fluid to the remote valve bank, and a return line connecting said valve means to said tank means for the return to said tank means of fluid diverted from said one tube means.

Claim 15

A hydraulic control system including, a slave cylinder having a piston, a remote control valve bank, a fluid source and means to supply hydraulic fluid under pressure to said remote bank, tube means the transmission of fluid from connecting the remote bank to the slave cylinder said tube means being further defined as including, a first tube means connecting the remote bank to the cylinder on one side of said piston, and a second tube means connecting the remote bank to the cylinder on the opposite side of said piston, and valve means located in one of said tube means adjacent said cylinder for diverting hydraulic fluid flowing from the cylinder out of said one tube means, tank means for the storage and supply of hydraulic fluid to the remote valve bank, and a return line connecting said valve means to said tank means for the return to said tank means of fluid diverted from said one tube means.

Claim 16

A hydraulic control system including, a slave cylinder having a piston, a remote control valve bank, a fluid source and means to supply hydraulic fluid under pressure to said remote bank, tube means for the transmission of fluid from the remote bank to the slave cylinder said tube means being further defined as including, a first tube means connecting the remote bank to the cylinder on one side of said piston, and a second tube means connecting the remote bank to the cylinder on the opposite side of said piston, and valve means located in each of said tube means adjacent said cylinder for diverting hydraulic fluid flowing from the cylinder out of the tube means, said valve means being further defined as including, a valve on each of said first and second tube means to allow fluid flowing from the cylinder to exit from the tube means, tank means for the storage and supply of hydraulic fluid to the remote control valve bank, and return lines connecting each of said valves to said tank means for the return to said tank means of fluid diverted from said tube means.

Claim 17

A hydraulic control system including, a slave cylinder having a piston, a remote control valve bank, a fluid source and means to supply hydraulic fluid under pressure to said remote bank, tube means for the transmission of fluid from the remote bank to the slave cylinder said tube means being further defined as including, a first tube means connecting the remote bank to the cylinder on one side of said piston, and a second tube means connecting the remote bank to the cylinder on the opposite side of said piston, and valve means located in each of said tube means adjacent said cylinder for diverting hydraulic fluid flowing from the cylinder out of the tube means, said valve means being further defined as including, a valve on each of said first and second tube means to allow fluid flowing from the cylinder to exit from the tube means, tank means for the storage and supply of hydraulic fluid to the remote control valve bank, and return lines connecting each of said valves to said tank means for the return to said tank means of fluid diverted from said tube means.

Claim 18

A hydraulic control system comprised of, a source of hydraulic fluid under pressure, A manually operated remote valve bank being operatively connected to said fluid source for receiving said fluid, first and second hydraulic lines connected at one of their ends to the remote bank for receiving said fluid from said bank, means in and operated by said remote bank for selectively supplying fluid from the fluid source through either of said first or second lines as desired, a dump valve at the opposite end of each of the first and second lines, each valve being comprised of, an inner chamber, and, first, second and third ports in fluid communication with said chamber, said first and second lines being connected to their respective valves at said first ports, and said second ports being in fluid communication with and close to the source of fluid, a cylinder, a piston mounted in said cylinder for reciprocal movement therein, third and fourth hydraulic lines connecting, in fluid communication, the third ports of said valves to said cylinder on opposite sides of said piston, whereby hydraulic fluid flowing through one of said third or fourth lines will cause the piston to move toward the other of the said third and fourth lines, thereby forcing fluid out of the cylinder and through said other lines, and wherein each of the dump valves are further defined as including, spool means, mounted for movement in said chamber, said spool means being normally biased to seat against and close the first port, said bias being insufficient to resist the force exerted against the spool means by the pressurized hydraulic fluid when said fluid is directed through the first or second lines by operation of the remote valve bank, said spool means assuming a second position when the bias is overcome by the force exerted by the fluid, said second position being defined as the spool means seating against and closing the second port.

Claim 19

A hydraulic control system comprised of, a source of hydraulic fluid under pressure, A manually operated remote valve bank being operatively connected to said fluid source for receiving said fluid, first and second hydraulic lines connected at one of their ends to the remote bank for receiving said fluid from said bank, means in and operated by said remote bank for selectively supplying fluid from the fluid source through either of said first or second lines as desired, a dump valve at the opposite end of each of the first and second lines, each valve being comprised of, an inner chamber, and, first, second and third ports in fluid communication with said chamber, said first and second lines being connected to their respective valves at said first ports, and said second ports being in fluid communication with and close to the source of fluid, a cylinder, a piston mounted in said cylinder for reciprocal movement therein, third and fourth hydraulic lines connecting, in fluid communication, the third ports of said valves to said cylinder on opposite sides of said piston, whereby hydraulic fluid flowing through one of said third or fourth lines will cause the piston to move toward the other of the said third and fourth lines, thereby forcing fluid out of the cylinder and through said other lines, and wherein each of the dump valves are further defined as including, spool means, mounted for movement in said chamber, said spool means being normally biased to seat against and close the first port, said bias being insufficient to resist the force exerted against the spool means by the pressurized hydraulic fluid when said fluid is directed through the first or second lines by operation of the remote valve bank, said spool means assuming a second position when the bias is overcome by the force exerted by the fluid, said second position being defined as the spool means seating against and closing the second port.

Claim 20

A hydraulic control system for controlling equipment, including, a control apparatus operatively connected to said equipment for the control of the equipment, said control apparatus being operated by the transmission of hydraulic fluid to and from said control apparatus, a control valve remote from the control apparatus two tubes, each connecting the control valve to said control apparatus, whereby fluid from the control valve may flow into and exit from the control apparatus in a simultaneous manner, and further including, valve means connected to at least one of said tubes adjacent said control apparatus for diverting out of said one tube fluid flowing from the control apparatus, tank means for the storage of and supply of hydraulic fluid to the remote valve, and a return line connecting said valve means to said tank means for the return to said tank means of fluid diverted from said one tube.

Claim 21

A hydraulic control system for controlling equipment, including, a control apparatus operatively connected to said equipment for the control of the equipment, said control apparatus being operated by the transmission of hydraulic fluid to and from said control apparatus, a control valve remote from the control apparatus two tubes, each connecting the control valve to said control apparatus, whereby fluid from the control valve may flow into and exit from the control apparatus in a simultaneous manner, and further including, valve means connected to at least one of said tubes adjacent said control apparatus for diverting out of said one tube fluid flowing from the control apparatus, tank means for the storage of and supply of hydraulic fluid to the remote valve, and a return line connecting said valve means to said tank means for the return to said tank means of fluid diverted from said one tube.

Claim 22

A hydraulic control system for controlling equipment, including: control apparatus operatively connected to said equipment for the control of the equipment, said control apparatus being operated by the transmission of hydraulic fluid to and from said control apparatus, a control valve remote from the control apparatus, two tubes, each connecting the control valve to said control apparatus, whereby fluid from the remote valve may flow into and exit from the control apparatus in a simultaneous manner, and further including, valve means connected to at least one of said tubes adjacent said control apparatus for diverting out of said one tube fluid flowing from the control apparatus, said valve means is connected to each of said tubes adjacent the control apparatus for diverting out of each respective tube fluid flowing from the control apparatus, tank means for the storage of and supply of hydraulic fluid to the remote valve, and return lines connecting said valve means to said tank means for the return to said tank means of fluid diverted from said tubes.

Claim 23

A hydraulic control system for controlling equipment, including: control apparatus operatively connected to said equipment for the control of the equipment, said control apparatus being operated by the transmission of hydraulic fluid to and from said control apparatus, a control valve remote from the control apparatus, two tubes, each connecting the control valve to said control apparatus, whereby fluid from the remote valve may flow into and exit from the control apparatus in a simultaneous manner, and further including, valve means connected to at least one of said tubes adjacent said control apparatus for diverting out of said one tube fluid flowing from the control apparatus, said valve means is connected to each of said tubes adjacent the control apparatus for diverting out of each respective tube fluid flowing from the control apparatus, tank means for the storage of and supply of hydraulic fluid to the remote valve, and return lines connecting said valve means to said tank means for the return to said tank means of fluid diverted from said tubes.

Claim 24

A hydraulic control system for operating and controlling equipment, including a remote control valve bank, a cylinder, a piston operatively connected to said equipment and being mounted for reciprocating movement in said cylinder, tube means connecting the remote valve bank to the cylinder for the transmission of hydraulic fluid to and from said cylinder for movement of the piston, valve means connected to said tube means adjacent the cylinder for diverting out of said tube means fluid flowing from the cylinder, said tube means being comprised of two tubes, each connecting the remote bank to the cylinder on opposite sides of said piston, whereby fluid may flow into and exit from the cylinder as the piston moves in either direction, and said valve means being further defined as including, a valve block being comprised of, a valve chamber, first adjacent inlet and outlet for one of said tubes in said chamber, second adjacent inlet and outlet in said chamber for the second of said tubes, a drain outlet lying between said first inlet and outlet and said second inlet and outlet, a first sealing member biased into a position lying between the first inlet and the first outlet, whereby the first inlet is normally sealed from said first outlet, and a second sealing member biased into a position lying between the second inlet and the second outlet, whereby the second inlet is sealed from said second outlet, the bias on each of said sealing members being insufficient to withstand a predetermined amount of force exerted through its respective inlet, whereby said predetermined force will overcome said bias to move the sealing member from between its respective inlet and outlet.

Claim 25

A hydraulic control system for operating and controlling equipment, including a remote control valve bank, a cylinder, a piston operatively connected to said equipment and being mounted for reciprocating movement in said cylinder, tube means connecting the remote valve bank to the cylinder for the transmission of hydraulic fluid to and from said cylinder for movement of the piston, valve means connected to said tube means adjacent the cylinder for diverting out of said tube means fluid flowing from the cylinder, said tube means being comprised of two tubes, each connecting the remote bank to the cylinder on opposite sides of said piston, whereby fluid may flow into and exit from the cylinder as the piston moves in either direction, and said valve means being further defined as including, a valve block being comprised of, a valve chamber, first adjacent inlet and outlet for one of said tubes in said chamber, second adjacent inlet and outlet in said chamber for the second of said tubes, a drain outlet lying between said first inlet and outlet and said second inlet and outlet, a first sealing member biased into a position lying between the first inlet and the first outlet, whereby the first inlet is normally sealed from said first outlet, and a second sealing member biased into a position lying between the second inlet and the second outlet, whereby the second inlet is sealed from said second outlet, the bias on each of said sealing members being insufficient to withstand a predetermined amount of force exerted through its respective inlet, whereby said predetermined force will overcome said bias to move the sealing member from between its respective inlet and outlet.

Claim 26

A hydraulic control system for operating and controlling equipment, including a remote control valve bank, a cylinder, a piston operatively connected to said equipment and being mounted for reciprocating movement in said cylinder, tube means connecting the remote valve bank to the cylinder for the transmission of hydraulic fluid to and from said cylinder for movement of the piston, valve means connected to said tube means adjacent the cylinder for diverting out of said tube means fluid flowing from the cylinder, said tube means being comprised of two tubes, each connecting the remote bank to the cylinder on opposite sides of said piston, whereby fluid may flow into and exit from the cylinder as the piston moves in either direction, and said valve means being further defined as including, a valve block comprised of, a valve chamber, and in said valve chamber, a first adjacent inlet and outlet for one of said tubes, a second adjacent inlet and outlet for the second of said tubes, a drain outlet lying between said first inlet and outlet and said second inlet and outlet, and spool means slidably mounted in said chamber and having two sealing members, said spool means having a first position in which the sealing members seal the inlets from their respective outlets, a second position in which the first inlet and outlet are in fluid communication and a third position in which the second inlet and outlet are in fluid communication.

Claim 27

A hydraulic control system for operating and controlling equipment, including a remote control valve bank, a cylinder, a piston operatively connected to said equipment and being mounted for reciprocating movement in said cylinder, tube means connecting the remote valve bank to the cylinder for the transmission of hydraulic fluid to and from said cylinder for movement of the piston, valve means connected to said tube means adjacent the cylinder for diverting out of said tube means fluid flowing from the cylinder, said tube means being comprised of two tubes, each connecting the remote bank to the cylinder on opposite sides of said piston, whereby fluid may flow into and exit from the cylinder as the piston moves in either direction, and said valve means being further defined as including, a valve block comprised of, a valve chamber, and in said valve chamber, a first adjacent inlet and outlet for one of said tubes, a second adjacent inlet and outlet for the second of said tubes, a drain outlet lying between said first inlet and outlet and said second inlet and outlet, and spool means slidably mounted in said chamber and having two sealing members, said spool means having a first position in which the sealing members seal the inlets from their respective outlets, a second position in which the first inlet and outlet are in fluid communication and a third position in which the second inlet and outlet are in fluid communication.