Valve
AssigneeHydac Systems & Services GmbH
InventorSascha Alexander Biwersi
Life of this patent
Estimating the term…
Abstract
A valve, which is characterized in that between a neutral position (38) of a control spool (STS) and one of its end positions (34, 42) a regeneration position (36) is provided. In the regeneration position, two utility ports (A, B) are interconnected in a fluid-conveying manner, or a floating position (40) is provided, in which these utility ports (A, B) are interconnected in a fluid-conveying manner. A further valve is characterized in that by a further motion of the control spool (STS) in the same direction, as that, in which a fluid connection is established between the utility ports (A, B) starting from the neutral position (38), this fluid connection is interrupted.
Claims17
A valve, comprising:
- a valve housing having a pressure supply port, first and second utility ports and a return port;
- and
- a control spool being guided for longitudinal movement in the valve housing and controlling fluid communication connections between the pressure supply port, the first and second utility ports and the return port, all of the fluid communication connections being blocked when the control spool is in a central neutral position in the valve housing, the pressure supply port being connected in fluid communication with the first utility port and the second utility port being connected with the return port in fluid communication when the control spool moves from the central neutral position in a first direction toward a first end position in the valve housing, the pressure supply port being connected in fluid communication with the second utility port and the first utility port being connected in fluid communication with the return port when the control spool moves from the central neutral position in a second direction opposite the first direction toward a second end position in the valve housing, the first and second utility ports being separated from each other in fluid communication when the control spool is in the first and second end positions in the valve housing, the first and second utility ports being connected to each other in fluid communication when the control spool is in a regeneration position between the central neutral position and the first end position and in a floating position between the central neutral position and the second end position.
A valve, comprising:
- a valve housing having a pressure supply port, first and second utility ports and a return port;
- and
- a control spool being guided for longitudinal movement in the valve housing and controlling fluid communication connections between the pressure supply port, the first and second utility ports and the return port, all of the fluid communication connections being blocked when the control spool is in a central neutral position in the valve housing, the pressure supply port being connected in fluid communication with the first utility port and the second utility port being connected with the return port in fluid communication when the control spool moves from the central neutral position in a first direction toward a first end position in the valve housing, the pressure supply port being connected in fluid communication with the second utility port and the first utility port being connected in fluid communication with the return port when the control spool moves from the central neutral position in a second direction opposite the first direction toward a second end position in the valve housing, the first and second utility ports being separated from each other in fluid communication when the control spool is in the first and second end positions in the valve housing, the first and second utility ports being connected to each other in fluid communication when the control spool is in a regeneration position via the pressure supply port and in a floating positon with each of the regeneration position and the floating position being between the central neutral position and one the first and second end positions, the first utility port being connected in fluid communication to the second utility port via the pressure supply port in the regeneration position.
A valve, comprising:
- a valve housing having a pressure supply port, first and second utility ports and a return port;
- and
- a control spool being guided for longitudinal movement in the valve housing and controlling fluid communication connections between the pressure supply port, the first and second utility ports and the return port, all of the fluid communication connections being blocked when the control spool is in a central neutral position in the valve housing, the pressure supply port being connected in fluid communication with the first utility port and the second utility port being connected with the return port in fluid communication when the control spool moves from the central neutral position in a first direction toward a first end position in the valve housing, the pressure supply port being connected in fluid communication with the second utility port and the first utility port being connected in fluid communication with the return port when the control spool moves from the central neutral position in a second direction opposite the first direction toward a second end position in the valve housing, the first and second utility ports being separated from each other in fluid communication when the control spool is in the first and second end positions in the valve housing, the first and second utility ports are connected to each other in fluid communication when the control spool is in a regeneration position and in a floating position with each of the regeneration position and the floating position being between the central neutral position and one of the first and second end positions, the control spool having first and second utility port recesses overlapping the first and second utility ports, respectively, and having a regeneration recess between the first and second utility port recesses and a floating recess between the second utility port recess and an adjacent free end of the control spool.
Dependencies are inferred from the claim text.