PUMP/COMPRESSOR VALVE SEAT

• US 20150316051A1
• Filed: 10/29/2013
• Published: 11/05/2015
• Est. Priority Date: 10/31/2012
• Status: Active Grant

• Current Assignee: Parker Intangibles LLC (Parker-Hannifin Corporation)
• Original Assignee: Parker-Hannifin Corporation
• Inventors: Rowland, Jonathan Mark, Ferry, Brian Nicholas, Hall, Brett Alan
• Granted Patent: US 10,641,260 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F04B 39/10 Adaptations or arrangements of distribution members
• CPC Class Codes: F04B 39/108 circular reed valves
• CPC Class Codes: F04B 53/1065 fixed at its centre
• CPC Class Codes: F04B 53/1087 Valve seats
• CPC Class Codes: F16K 15/14 with flexible valve members
• CPC Class Codes: F16K 15/148 the closure elements being fixed in their centre
• CPC Class Codes: F16K 29/00 Arrangements for movement of valve members other than for opening and closing the valve, e.g. for grinding-in, for preventing sticking
• CPC Class Codes: Y10T 137/7848 Permits flow at valve interface

Abstract

Valve assembly for a pump, the valve assembly including: a valve seat having a valve face (60), a flexible valve having a sealing portion for abutting the valve face (60), and at least a fluid pathway (66, 68, 70) from an interior of the valve seat to an exterior of the valve seat that serves as a leak flow path for fluid when the valve is in the closed position to reduce pressure build up on the valve. In this way, the vacuum inside the pump can be released when the value is in the closed position and the pump is stopped, thereby allowing the pump to start/restart due to reduced pressure build up on a side of the valve abutting the valve face. A pump or compressor including such a valve assembly is also disclosed.

Claims

1. A pump for pumping fluids, the pump including:

a pump head having at least one port, a valve seat having a valve face, and a flow passage extending in an axial direction through the valve seat to the at least one port;

a valve having a sealing portion on a side thereof for abutting the valve face, the valve being movable between an open position allowing fluid flow through the flow passage and a closed position preventing fluid flow through the flow passage;

an electric motor coupled to the pump head for effecting fluid flow to cause the valve to move from the closed position to the open position to allow fluid to flow to the at least one port; and

means for providing a leak flow path for fluid when the valve is in the closed position to reduce pressure build up on the side of the valve.

2. The pump according to claim 1, wherein the means for providing a leak flow path include at least one channel extending from an interior of the valve seat to an exterior of the valve seat.

3. The pump according to claim 2, wherein the at least one channel is bounded on at least one side by at least one land axially protruding from the valve seat.

4. The pump according to claim 3, wherein the at least one land includes first and second lands, and wherein the at least one channel is bounded by the first and second lands.

8. The pump according to claim 3, further including a plurality of sets of at least one channel and at least one land circumferentially spaced around the valve seat.

10. The pump according to claim 8, wherein each set of at least one channel and at least one land includes first and second channels each bounded on a side by a side of the at least one land.

11. The pump according to claim 1, wherein the at least one channel is configured to prevent the valve from conforming to the valve face.

12. The pump according to claim 1, wherein the sealing portion of the valve is an annular sealing portion, and wherein the valve seat has a portion raised sufficiently to preclude the annular sealing portion from conforming to the at least one channel.

14. The pump according to claim 1, wherein the at least one port includes a suction port through which fluid is pumped into the pump head and a discharge port through which fluid is pumped out of the pump head.

15. The pump according to claim 14, wherein the valve seat includes first and second valve seats each having a valve face and a flow passage extending in the axial direction through the valve seat, wherein the flow passage of the first valve seat extends through the first valve seat to the suction port and the flow passage of the second valve seat extends through the second valve seat to the discharge port.

16. The pump according to claim 15, wherein the valve includes first and second valves each having a sealing portion on a side thereof for abutting the valve face of the first and second valve seats respectively.

17. The pump according to claim 15, wherein the first and second valve seats are reversely oriented.

18. The pump according to claim 17, wherein the first valve is movable between the open position allowing fluid flow from the suction port through the flow passage and the closed position preventing fluid flow through the flow passage to the suction port, and wherein the second valve is movable between the open position allowing fluid flow from the flow passage to the discharge part and the closed position preventing fluid flow from the discharge port through the flow passage.

28. A pump or compressor including the valve assembly according to claim 1.

5. (canceled)

6. (canceled)

7. (canceled)

9. (canceled)

13. (canceled)

19. A valve assembly for a pump, the valve assembly including:

a valve seat including a body having a valve face, a flow passage extending in an axial direction through the body, and at least one channel in the body that forms a fluid pathway from an interior of the valve seat to an exterior of the valve seat; and

a valve having a sealing portion on a side thereof for abutting the valve face, the valve being movable between an open position allowing fluid flow through the valve seat and a closed position preventing fluid flow through the valve seat,

wherein the fluid pathway is a leak flow path for fluid when the valve is in the closed position to reduce pressure build up on the side of the valve.

20. The valve assembly according to claim 19, further including at least one raised surface axially protruding from the body and defining one side of the channel, wherein the at least one raised surface prevents the valve from conforming to the at least one channel.

21. The valve assembly according to claim 19, wherein the at least one channel includes first and second channels.

22. The valve assembly according to claim 21, wherein the first and second channels each are bounded on a side by a side of the at least one raised surface.

23. The valve assembly according to claim 20, wherein the at least one raised surface includes first and second raised surfaces each bounding a side of at least one channel.

24. (canceled)

25. (canceled)

26. (canceled)

27. (canceled)

29. A valve seat for a pump or compressor, the valve seat including:

a body having a valve face configured to abut a sealing surface of a valve;

a flow passage extending in an axial direction through the body;

at least one channel in the body that forms a fluid pathway from an interior of the body to an exterior of the body in a direction perpendicular to the axial direction; and

at least one raised surface adjacent the at least one channel and axially protruding from the body,

wherein the fluid pathway is a leak flow path for fluid when the valve is in a closed position, and

wherein the at least one raised surface prevents the valve from conforming to the at least one channel.

30. (canceled)

31. (canceled)

32. (canceled)

33. (canceled)

34. (canceled)

35. (canceled)

36. (canceled)

37. (canceled)

38. (canceled)