Back to results
US 10,036,408 B2Granted
Hydraulic valve
AssigneeClaverham Limited
InventorsPaul Brewer, Reg Raval, Phillip A. Rowles
Life of this patent
Estimating the term…
Abstract
A spool for a hydraulic spool valve, comprising: a pressure chamber for connecting a pressure line to a hydraulic cylinder; at least one return chamber for connecting the hydraulic cylinder to a reservoir; and an actuator slot for receiving a drive lever; wherein the spool further comprises a fluid path connecting said pressure chamber to said actuator slot and a pressure plate movably mounted in the slot such that in use it is disposed between the fluid path and the drive lever.
Claims14
A spool for a hydraulic spool valve, comprising:
- a pressure chamber for connecting a pressure line to a hydraulic cylinder;
- at least one return chamber for connecting the hydraulic cylinder to a reservoir;
- and
- an actuator slot for receiving a drive lever;
- wherein the spool further comprises a fluid path connecting said pressure chamber to said actuator slot and a pressure plate movably mounted in the slot such that in use it is disposed between the fluid path and the drive lever and maintains contact with the drive lever.
2 more elements
A spool for a hydraulic spool valve, comprising:
- a pressure chamber for connecting a pressure line to a hydraulic cylinder;
- at least one return chamber for connecting the hydraulic cylinder to a reservoir;
- and
- an actuator slot for receiving a drive lever;
- wherein the spool further comprises a fluid path connecting said pressure chamber to said actuator slot and a pressure plate movably mounted in the slot such that in use it is disposed between the fluid path and the drive lever;
- wherein the pressure plate comprises a cavity on the side facing the fluid path;
- and
- wherein the cavity is sized such that the pressure from the fluid path is sufficient to keep the drive lever pressed firmly against the opposite wall of the slot.
5 more elements
A spool valve comprising:
- a spool including:
- a pressure chamber for connecting a pressure line to a hydraulic cylinder;
- at least one return chamber for connecting the hydraulic cylinder to a reservoir;
- and
- an actuator slot for receiving a drive lever;
- wherein the spool further comprises a fluid path connecting said pressure chamber to said actuator slot and a pressure plate movably mounted in the slot such that in use it is disposed between the fluid path and the drive lever and maintains contact with the drive lever;
- and
- a housing to receive the spool;
- and
- fluid connections to connect the pressure chamber and at least one return chamber of the spool to a pump, a hydraulic cylinder and a reservoir.
7 more elements
Dependencies are inferred from the claim text.