Plate-type diaphragm pump and method of use

• US 5,542,821 A
• Filed: 06/28/1995
• Issued: 08/06/1996
• Est. Priority Date: 06/28/1995
• Status: Expired due to Fees

• Current Assignee: BASF Corporation (BASF SE)
• Original Assignee: BASF Corporation (BASF SE)
• Inventors: Dugan, Jeffrey S.
• Primary Examiner(s): Gluck, Richard E.
• Application Number:
  US08/496,173
• Time in Patent Office: 405 Days
• Field of Search: 417/322, 417/413.1, 417/413.2, 417/413.3, 417/53
• US Class Current: 417/53
• CPC Class Codes: F04B 17/00 Pumps characterised by combination with, or adaptation to, specific driving engines or motors
• CPC Class Codes: F04B 43/043 Micropumps
• CPC Class Codes: F04B 53/105 one flexible element oscillating around a fixed point
• CPC Class Codes: F04B 7/0076 the members being actuated by electro-magnetic means
• CPC Class Codes: F15C 5/00 Manufacture of fluid circuit elements; Manufacture of assemblages of such elements integrated circuits

Abstract

A plate-type diaphragm pump is composed of an inlet valve member containing two inlet plate structures, an outlet valve member containing two outlet plate structures, and a diaphragm member preferably containing one or two plates, the plate structures being plates or plate sections. A first inlet plate structure has a first inlet channel section and a first valve-seat, a second inlet plate structure has a second inlet channel section and an inlet flexible element, a first outlet plate structure has a first outlet channel section and a second valve-seat, and a second outlet plate structure has a second outlet channel section and an outlet flexible element. The inlet and outlet flexible elements, respectively disposed between the inlet channel sections and the outlet channel sections, have free ends disposed for movement onto and off of the respective first and second valve-seats to respectively prevent or permit fluid flow between the respective inlet and outlet channel sections. The diaphragm member has a deflectable portion disposed for movement toward and away from a diaphragm-seat situated between the diaphragm member and the inlet and outlet channels to respectively prevent or permit fluid flow between the inlet and outlet channels. Movement of the free ends of the flexible elements and the deflectable portion of the diaphragm member may be magnetic-, pressure-, or temperature-induced.

Claims

1. A plate-type diaphragm pump, comprising:

an inlet valve-member containing;

a first inlet plate structure containing a first valve-seat and an integral first section of an inlet channel; and

a second inlet plate structure containing an integral second section of the inlet channel and a flexible inlet element disposed between said sections of said inlet channel, said inlet element having a free end disposed to move off of and onto the first valve-seat to respectively allow and prevent fluid flow through said inlet channel;

an outlet valve-member containing;

a first outlet plate structure containing a second valve-seat and an integral first section of an outlet channel; and

a second outlet plate structure containing an integral second section of the outlet channel and a flexible outlet element disposed between said sections of said outlet channel, said outlet element having a free end disposed to move off of and onto the second valve-seat to respectively allow and prevent fluid flow through said outlet channel; and

a diaphragm member having a deflectable portion disposed for movement toward and away from a diaphragm-seat situated in a fluid chamber disposed between the diaphragm member and the inlet and outlet channels;

wherein said first inlet plate structure, said second inlet plate structure, said first outlet plate structure and said second outlet plate structure are each in the form of a plate or a plate section.

2. A pump according to claim 1, wherein said diaphragm member is formed in at least one diaphragm plate.

3. A pump according to claim 2, further comprising a first end-plate and a second end-plate, said first end-plate being disposed on said at least one diaphragm plate and said second end-plate being disposed on said first inlet plate structure and said second outlet plate structure.

4. A pump according to claim 3, wherein said second inlet plate structure is a first inlet plate section and said first outlet plate structure is a first outlet plate section, further wherein said first inlet plate section and said first outlet plate section together constitute a single first inlet/outlet plate.

5. A pump according to claim 4, wherein said first inlet plate structure and said second outlet plate structure are separate plates.

6. A pump according to claim 5, wherein said first end-plate and said at least one diaphragm plate each comprise a permanently or reversibly charged material.

7. A pump according to claim 6, wherein said first end-plate and said at least one diaphragm plate are charged to opposite polarities.

8. A pump according to claim 6, wherein said first end-plate and said at least one diaphragm plate are charged to like polarities.

9. A pump according to claim 6, wherein said first inlet/outlet plate, said first inlet plate, and said second outlet plate each comprise a permanently or reversibly charged material.

10. A pump according to claim 9, wherein said first end-plate and said at least one diaphragm plate are charged to opposite polarities;

said at least one diaphragm plate and said first inlet/outlet plate are charged to opposite polarities;

said first inlet plate and said first inlet/outlet plate are charged to like polarities; and

said first inlet/outlet plate and said second outlet plate are charged to opposite polarities.

11. A pump according to claim 9, wherein said first end-plate and said at least one diaphragm plate are charged to like polarities;

said at least one diaphragm plate and said first inlet/outlet plate are charged to opposite polarities;

said first inlet plate and said first inlet/outlet plate are charged to opposite polarities; and

said first inlet/outlet plate and said second outlet plate are charged to like polarities.

12. A pump according to claim 4, wherein said first inlet plate structure is a second inlet plate section and said second outlet plate structure is a second outlet plate section, further wherein said second inlet plate section and said second outlet plate section together constitute a single second inlet/outlet plate.

13. A pump according to claim 2, wherein said diaphragm member comprises a single diaphragm element which is integral with and cantilevered onto a first diaphragm plate.

14. A pump according to claim 2, wherein said diaphragm member comprises a composite containing a first diaphragm element and a second diaphragm element attached to each other in a face-to-face configuration, wherein said first diaphragm element is integral with a first diaphragm plate and contains a first material having a first thermal expansion coefficient, and said second diaphragm element is non-integral with said first diaphragm plate and contains a second material having a second thermal expansion coefficient.

15. A pump according to claim 14, wherein said second diaphragm element is integral with a second diaphragm plate, said second diaphragm plate being facially adjacent and attached to said first diaphragm plate and disposed between said first diaphragm plate and said diaphragm-seat.

16. A pump according to claim 15, wherein said diaphragm member has one or more heat exchange channels formed therein.

17. A pump according to claim 16, wherein said one or more heat exchange channels are formed by an etching process.

18. A pump according to claim 15, wherein either or both of the flexible inlet element and the flexible outlet element comprises a composite containing a first sub-element and a second sub-element attached to each other in a face-to-face configuration, wherein said first sub-element contains a first material having a first thermal expansion coefficient, and said second sub-element contains a second material having a second thermal expansion coefficient.

19. A pump according to claim 1, wherein said flexible inlet element is integral with and cantilevered onto said second inlet plate structure and said flexible outlet element is integral with and cantilevered onto said second outlet plate structure, further wherein said flexible inlet element and said flexible outlet element are formed in said second inlet plate structure and said second outlet plate, respectively, by an etching process.

20. A pump according to claim 2, wherein said inlet channels, said outlet channels, said fluid chamber and said diaphragm member are formed by an etching process.

21. A pump according to claim 2, wherein said inlet plates, said outlet plate structures and said at least one diaphragm plate structure each have a thickness of from about 0.001 inch to about 1.0 inch.

22. A method of controlling fluid flow by means of a plate-type diaphragm pump comprising:

an inlet valve-member containing;

a first inlet plate structure containing an integral first section of an inlet channel and a first valve-seat; and

a second inlet plate structure containing an integral second section of the inlet channel and a flexible inlet element disposed between said sections of said inlet channel, said inlet element having a free end disposed to move off of and onto the first valve-seat to respectively allow and prevent fluid flow through said inlet channel;

an outlet valve-member containing;

a first outlet plate structure containing an integral first section of an outlet channel and a second valve-seat; and

a second outlet plate structure containing an integral second section of the outlet channel and a flexible outlet element disposed between said sections of said outlet channel, said outlet element having a free end disposed to move off of and onto the second valve-seat to respectively allow and prevent fluid flow through said outlet channel; and

a diaphragm member having a deflectable portion disposed for movement toward and away from a diaphragm-seat situated in a fluid chamber disposed between the diaphragm member and the inlet and outlet channels;

wherein said first inlet plate structure, said second inlet plate structure, said first outlet plate structure and said second outlet plate structure are each in the form of a plate or a plate section;

wherein said method comprises the steps of;

introducing a first fluid into the first section of the inlet channel; and

inducing a first actuating force sufficient to cause;

the deflectable portion of the diaphragm member to move away from the diaphragm-seat, the free end of the flexible inlet element to move off of the first valve-seat, and the free end of the flexible outlet element to move onto the second valve-seat, so as to cause the first fluid to flow through the inlet channel and into the fluid chamber; and

inducing a second actuating force sufficient to cause;

the deflectable portion of the diaphragm member to move toward the diaphragm-seat, the free end of the flexible inlet element to move onto the first valve-seat, and the free end of the flexible outlet element to move off of the second valve-seat, so as to cause the first fluid to flow from the fluid chamber through the outlet channel.

23. A method according to claim 22, wherein said diaphragm member is formed in at least one diaphragm plate.

24. A method according to claim 23, wherein said pump further comprises a first end-plate and a second end-plate, said first end-plate being disposed on said at least one diaphragm plate and said second end-plate being disposed on said first inlet plate structure and said second outlet plate.

25. A method according to claim 24, wherein said second inlet plate structure is a first inlet plate section and said first outlet plate structure is a first outlet plate section, further wherein said first inlet plate section and said first outlet plate section together constitute a single first inlet/outlet plate.

26. A method according to claim 25, wherein said first inlet plate structure and said second outlet plate structure are each plates.

27. A method according to claim 26, wherein said first end-plate and said at least one diaphragm plate each comprise a permanently or reversibly charged material.

28. A method according to claim 27, wherein said first inlet/outlet plate, said first inlet plate, and said second outlet plate each comprise a permanently or reversibly charged material.

29. A method according to claim 28, wherein said first end-plate and said diaphragm plate are charged to opposite polarities;

said diaphragm plate and said first inlet/outlet plate are charged to opposite polarities;

said first inlet plate and said first inlet/outlet plate are charged to like polarities; and

said first inlet/outlet plate and said second outlet plate are charged to opposite polarities.

30. A method according to claim 28, wherein said first end-plate and said diaphragm plate are charged to like polarities;

said diaphragm plate and said first inlet/outlet plate are charged to opposite polarities;

said first inlet plate and said first inlet/outlet plate are charged to opposite polarities; and

said first inlet/outlet plate and said second outlet plate are charged to like polarities.

31. A method according to claim 25, wherein said first inlet plate structure is a second inlet plate section and said second outlet plate structure is a second outlet plate section, further wherein said second inlet plate section and said second outlet plate section together constitute a single second inlet/outlet plate.

32. A method according to claim 24, wherein said diaphragm member comprises a single diaphragm element which is integral with and cantilevered onto a first diaphragm plate.

33. A method according to claim 24, wherein said diaphragm member comprises a composite containing a first diaphragm element and a second diaphragm element attached to each other in a face-to-face configuration, wherein said first diaphragm element is integral with a first diaphragm plate and contains a first material having a first thermal expansion coefficient, and said second diaphragm element is non-integral with said first diaphragm plate and contains a second material having a second thermal expansion coefficient.

34. A method according to claim 33, wherein said second diaphragm element is integral with a second diaphragm plate, said second diaphragm plate being facially adjacent and attached to said first diaphragm plate and disposed between said first diaphragm plate and said diaphragm-seat.

35. A method according to claim 34, wherein said diaphragm member has one or more heat exchange channels formed therein.

36. A method according to claim 35, wherein said one or more heat exchange channels are formed by an etching process.

37. A method according to claim 33, wherein either or both of the flexible inlet element and the flexible outlet element comprises a composite containing a first sub-element and a second sub-element attached to each other in a face-to-face configuration, wherein said first sub-element contains a first material having a first thermal expansion coefficient, and said second sub-element contains a second material having a second thermal expansion coefficient.

38. A method according to claim 22, wherein said flexible inlet element is integral with and cantilevered onto said second inlet plate structure and said flexible outlet element is integral with and cantilevered onto said second outlet plate structure, further wherein said flexible inlet element and said flexible outlet element are formed in said second inlet plate structure and said second outlet plate structure, respectively, by an etching process.

39. A method according to claim 24, wherein said inlet channels, said outlet channels, said fluid chamber and said diaphragm member are formed by an etching process.

40. A method according to claim 24, wherein said inlet plate structures, said outlet plate structures and said at least one diaphragm plate each have a thickness of from about 0.001 inch to about 1.0 inch.