Plate-type valve and method of use

• US 5,899,218 A
• Filed: 01/21/1997
• Issued: 05/04/1999
• 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): Ferensic, Denise L.
• Assistant Examiner(s): FARID, RAMYAR M
• Application Number:
  US08/786,212
• Time in Patent Office: 833 Days
• Field of Search: 137/1, 137/855, 137/527, 251/129.01, 251/129.02, 251/129.06, 251/30.05, 251/11
• US Class Current: 137/1
• CPC Class Codes: F15C 5/00 Manufacture of fluid circuit elements; Manufacture of assemblages of such elements integrated circuits
• CPC Class Codes: F16K 15/16 with tongue-shaped laminae
• CPC Class Codes: Y10T 137/0318 Processes
• CPC Class Codes: Y10T 137/7891 Flap or reed
• CPC Class Codes: Y10T 137/7898 Pivoted valves

Abstract

A plate-type valve and method of using same to control fluid flow are disclosed, wherein the plate-type valve contains:

a first valve plate having a first channel formed therein;

a second valve plate having a second channel formed therein and a valve seating portion;

a flexible member having a movable free end and being disposed between the first channel and the second channel, the movable free end of the flexible member being disposed for movement onto and off of the valve seating portion by means of an actuating force such that movement of the movable free end onto the valve seating portion prevents fluid flow between the first channel and the second channel and movement of the movable free end off of the valve seating portion allows fluid flow between the first channel and the second channel.

Claims

1. A method for controlling fluid flow by means of a plate-type valve, said plate-type valve comprising:

a first valve plate having a first channel formed therein, said first valve plate being formed of a first charged material;

a second valve plate having a second channel formed therein and a valve seating portion, said second valve plate being formed of a second charged material; and

a flexible member having a movable free end and being disposed between the first channel and the second channel, said flexible member being cantilevered at one end thereof to said first valve plate;

wherein the first and second plates are capable of being charred to polarities so as to provide between said flexible member and said valve seating portion (i) an electrostatic attraction force so as to cause the movable free end of the flexible member to move onto the valve seating portion, and (ii) an electrostatic repulsion force so as to cause the movable free end to move away from the valve seating portion;

wherein movement of the movable free end onto the valve seating portion prevents fluid flow between the first channel and the second channel and movement of the movable free end away from the valve seating portion allows fluid flow between the first channel and the second channel;

wherein said method comprises (i) charging said first and second plates to opposite polarities to provide an electrostatic attraction force between the flexible member and the valve seating portion so as to cause the movable free end of the flexible member to move onto the valve seating portion so as to prevent fluid flow between the first channel and the second channel; and

/or (ii) charging said first and second plates to like polarities to provide an electrostatic repulsion force between the flexible member and the valve seating portion so as to cause the movable free end of the flexible member to move away from the valve seating portion so as to allow fluid flow between the first channel and the second channel.

2. A method according to claim 1, wherein said valve seating portion is integral with said second valve plate.

3. A method according to claim 1, wherein said flexible member comprises a first flexible element integral with the first valve plate.

4. A method according to claim 1, wherein said first channel and said second channel are etched channels.

5. A method according to claim 1, wherein said first valve plate and said second valve plate each has a thickness of about 0.001 inch to about 1.0 inch.