# US 2017/0283227 A1 · Sectional hydraulic valve and a truck mounted forklift incorporating the valve > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0283227 A1 - Document ID: US20170283227A1 - Status: Published application - Kind: A1 - Application number: 15/476,268 - Filed: 2017-03-31 - Published: 2017-10-05 - Earliest claimed: 2016-03-31 - Assignees: Cargotec Research & Development Ireland Limited; Bucher Hydraulics AG - Inventors: Kevin Turnbull; Luca Taddia; Stefano Guerrieri - Web page: https://patentgrep.com/patent/US20170283227A1 ## CPC - B66F 9/07563: {Fork-lift trucks adapted to be carried by transport vehicles} - B66F 9/22: Hydraulic devices or systems - F15B 13/0402: {for linearly sliding valves, e.g. spool valves} - F15B 13/043: with electrically-controlled pilot valves - F15B 13/0832: {Modular valves} - F15B 13/0839: {Stacked plate type valves} - F15B 13/0896: {using different types or sizes of valves} - F15B 2211/3059: having multiple valves for multiple output members - B66F: HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD ({invalid lifting devices A61G7/10; } mounting artificial islands on piles or like supports E02B17/00; scaffolding combined with lifting devices E04G1/22; lifting devices for sliding forms E04G11/24; lifting of buildings E04G23/06; shores or struts E04G25/00; lifts or other hoisting devices on ladders E06C7/12; props for mining E21D15/00) - F15B: SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR ## Abstract This invention relates to a sectional hydraulic valve and a truck mounted forklift incorporating the distributor. The sectional hydraulic valve comprises an inlet cover, a plurality of hydraulic sections and an end cap. The hydraulic sections each having a pump gallery, a tank gallery, an A port, a B port, a spool and a remote pilot gallery. The end cap comprises a pump port coupled to the pump gallery, a tank port coupled to the tank gallery and a connecting conduit between the pump port and the tank port. The end cap further comprises a remote pilot gallery port coupled to the remote pilot gallery, a fluid passageway between the remote pilot gallery port and the connecting conduit, and a valve assembly operable to selectively permit or restrict flow of hydraulic fluid between the connecting conduit in the end cap and the remote pilot gallery in the hydraulic section. ## Claims ### Claim 1 A sectional hydraulic valve of the type comprising an inlet cover, a plurality of hydraulic sections and an end cap; the hydraulic sections each having a pump gallery, a tank gallery, an A port, a B port, a spool for selectively coupling one of the A port and the B port to the pump gallery and the other of the A port and the B port to the tank gallery, a first remote pilot gallery, the first remote pilot gallery being operatively coupled to one of the A port and the B port of a first one of the hydraulic sections, and a second remote pilot gallery, the second remote pilot gallery being operatively coupled to the other of the A port and the B port of the first one of the hydraulic sections; the end cap comprising a pump port coupled to the pump gallery, a tank port coupled to the tank gallery and a connecting conduit between the pump port and the tank port; and in which the end cap further comprises: a first remote pilot gallery port coupled to the first remote pilot gallery; a fluid passageway between the first remote pilot gallery port and the connecting conduit; a second remote pilot gallery port coupled to the second remote pilot gallery; a second fluid passageway between the second remote pilot gallery port and the connecting conduit; and a valve assembly operable to selectively permit or restrict flow of hydraulic fluid between the connecting conduit in the end cap and the remote pilot galleries in the first one of the hydraulic sections. ### Claim 2 (depends on 1) The sectional hydraulic valve as claimed in claim 1 in which: the hydraulic sections each comprise a third remote pilot gallery, the third remote pilot gallery being operatively coupled to one of the A port and the B port of a second one of the hydraulic sections; and a fourth remote pilot gallery, the fourth remote pilot gallery being operatively coupled to the other of the A port and the B port of the second one of the hydraulic sections; and the end cap further comprises: a third remote pilot gallery port coupled to the third remote pilot gallery; a third fluid passageway between the third remote pilot gallery port and the connecting conduit; a fourth remote pilot gallery port coupled to the fourth remote pilot gallery; a fourth fluid passageway between the fourth remote pilot gallery port and the connecting conduit; and the valve assembly being operable to selectively permit or restrict flow of hydraulic fluid between the connecting conduit in the end cap and the remote pilot galleries in the second one of the hydraulic sections. ### Claim 3 (depends on 2) The sectional hydraulic valve as claimed in claim 2 in which the first and third fluid passageways are led to a common valve in the valve assembly. ### Claim 4 (depends on 3) The sectional hydraulic valve as claimed in claim 3 in which the second and fourth fluid passageways are led to a common valve in the valve assembly. ### Claim 5 (depends on 1) The sectional hydraulic valve as claimed in claim 1 in which the valve in the valve assembly comprises at least one spool. ### Claim 6 (depends on 5) The sectional hydraulic valve as claimed in claim 5 in which the at least one spool is operated by way of a dedicated solenoid. ### Claim 7 (depends on 1) The sectional hydraulic valve as claimed in claim 1 in which the valve assembly comprises a spool operable to selectively redirect the hydraulic fluid in the connecting conduit away from the tank port to one or more of the remote pilot galleries. ### Claim 8 (depends on 1) The sectional hydraulic valve as claimed in claim 1 in which there is provided a remotely controllable secondary actuator connected to the spool of another of the hydraulic sections. ### Claim 9 (depends on 8) The sectional hydraulic valve as claimed in claim 8 in which the remotely controllable secondary actuator comprises a solenoid. ### Claim 10 (depends on 2) A sectional hydraulic valve as claimed in claim 2 in which: the hydraulic sections each comprise a fifth remote pilot gallery, the fifth remote pilot gallery being operatively coupled to one of the A port and the B port of a third one of the hydraulic sections; and a sixth remote pilot gallery, the sixth remote pilot gallery being operatively coupled to the other of the A port and the B port of the third one of the hydraulic sections; and the end cap further comprises: a fifth remote pilot gallery port coupled to the fifth remote pilot gallery; a fifth fluid passageway between the fifth remote pilot gallery port and the connecting conduit; a sixth remote pilot gallery port coupled to the sixth remote pilot gallery; a sixth fluid passageway between the sixth remote pilot gallery port and the connecting conduit; and the valve assembly being operable to selectively permit or restrict flow of hydraulic fluid between the connecting conduit in the end cap and the remote pilot galleries in the third one of the hydraulic sections. ### Claim 11 A truck mounted forklift for mounting on the rear of a vehicle, the truck mounted forklift comprising a u-shaped chassis having a pair of forwardly projecting side bars bridged by a rear crossbar, a wheel adjacent the forwardmost end of each of the side bars and a rear wheel mounted on the rear cross bar, a driver's station mounted to one side of the chassis, a motive power unit mounted on the other side of the chassis and a lifting assembly mounted on the chassis, the lifting assembly being operated by a plurality of hydraulic cylinders, a primary control panel for the hydraulics located internal the driver's station and a secondary control panel for control of the hydraulics located remotely from the primary control panel of the forklift truck, the secondary hydraulics control panel being positioned in a location accessible by a forklift operator in a position dismounted from the forklift, and in which the hydraulic fluid to and from the plurality of hydraulic cylinders is routed through the sectional hydraulic valve as claimed in any preceding claim. ### Claim 12 (depends on 11) The truck mounted forklift as claimed in claim 11 in which the secondary control panel comprises an ignition switch and a switch to vent hydraulic fluid from the rod side of a lift cylinder and the rod side of a tilt cylinder of the lifting assembly using the sectional hydraulic valve. ### Claim 13 (depends on 12) The truck mounted forklift as claimed in claim 12 in which the secondary control panel comprises a switch to deliver hydraulic fluid to the rod side of the lift cylinder and the rod side of the tilt cylinder and vent hydraulic fluid from the bore side of the lift cylinder and the bore side of the tilt cylinder using the sectional hydraulic valve. ### Claim 14 (depends on 12) The truck mounted forklift as claimed in claim 12 in which the secondary control panel comprises a switch to deliver hydraulic fluid to the bore side of the lift cylinder and the bore side of the tilt cylinder and vent hydraulic fluid from the rod side of the lift cylinder and the rod side of the tilt cylinder using the sectional hydraulic valve. ### Claim 15 (depends on 13) The truck mounted forklift as claimed in claim 13 in which the secondary control panel comprises a switch to deliver hydraulic fluid to the bore side of the lift cylinder and the bore side of the tilt cylinder and vent hydraulic fluid from the rod side of the lift cylinder and the rod side of the tilt cylinder using the sectional hydraulic valve. ### Claim 16 (depends on 12) The truck mounted forklift as claimed in claim 12 in which the secondary control panel comprises a switch to operate a remotely controllable secondary actuator connected to the spool of one of the hydraulic sections of the sectional hydraulic valve. ### Claim 17 (depends on 13) The truck mounted forklift as claimed in claim 13 in which the secondary control panel comprises a switch to operate a remotely controllable secondary actuator connected to the spool of one of the hydraulic sections of the sectional hydraulic valve. ### Claim 18 (depends on 14) The truck mounted forklift as claimed in claim 14 in which the secondary control panel comprises a switch to operate a remotely controllable secondary actuator connected to the spool of one of the hydraulic sections of the sectional hydraulic valve. ### Claim 19 (depends on 15) The truck mounted forklift as claimed in claim 15 in which the secondary control panel comprises a switch to operate a remotely controllable secondary actuator connected to the spool of one of the hydraulic sections of the sectional hydraulic valve.