Dual plate check valve

• US 6,237,625 B1
• Filed: 02/23/2000
• Issued: 05/29/2001
• Est. Priority Date: 02/23/2000
• Status: Expired due to Fees

• Current Assignee: Ronald E. Randolph
• Original Assignee: Ronald E. Randolph
• Inventors: Randolph, Ronald E.
• Primary Examiner(s): Rivell, John
• Assistant Examiner(s): SCHOENFELD, MEREDITH HOPE
• Application Number:
  US09/511,412
• Time in Patent Office: 461 Days
• Field of Search: 137/512.1, 137/527, 137/512.15
• US Class Current: 137/512.15
• CPC Class Codes: F16K 15/038 having a common hinge
• CPC Class Codes: Y10T 137/784 Integral resilient member forms plural valves
• CPC Class Codes: Y10T 137/7898 Pivoted valves

Abstract

An inventive dual plate check valve is provided which comprises a central anchoring fixture and an elastomer hinge fixed to the central anchoring fixture by a center post clamp. Two opposing sections of the elastomer hinge are formed on opposing sides of the center post clamp, and at least one disc member is attached to each opposing section of the elastomer hinge to form a valve plate which is pivotable about the center post clamp. In one embodiment, the central anchoring fixture forms projections on opposing sides of the center post clamp such that the lower edges of the valve plates are prevented from sliding off of the upper surface of the central anchoring fixture. In another embodiment, a stop pin is provided which extends vertically between the valve plates.

Claims

1. A dual plate check valve, comprising:

a central anchoring fixture having an upper surface;

an elastomer hinge, said elastomer hinge fixed to said central anchoring fixture by a center post clamp such that two opposing sections of said elastomer hinge are formed on opposing sides of said center post clamp, at least one disc member attached to each said opposing section of said elastomer hinge to form a valve plate having a lower edge, said valve plates each pivotable about said center post clamp into an open and a closed position;

said central anchoring fixture forming at least one projection on each side of said center post clamp such that said lower edges of said valve plates are prevented from sliding off of said upper surface of said central anchoring fixture.

2. The check valve of claim 1 wherein said projections are formed at an outer edge of the upper surface of said central anchoring fixture.

3. The check valve of claim 2 wherein each of said projections extends only partially along the outer edge of the upper surface of said central anchoring fixture on which it is formed.

4. The check valve of claim 2 wherein each of said projections extends along the entirety of the outer edge of the upper surface of said central anchoring fixture on which it is formed.

5. The check valve of claim 2 wherein two disc members are attached to each opposing section of said elastomer hinge to form said valve plates.

6. The check valve of claim 5 wherein said valve plates are substantially D-shaped.

7. The check valve of claim 1 further comprising a stop pin attached to said central anchoring fixture or center post clamp normal to said upper surface of said central anchoring fixture and extending between said valve plates, said stop pin preventing each valve plate from pivoting beyond said stop pin.

8. A dual plate check valve, comprising:

a central anchoring fixture having an upper surface;

an elastomer hinge, said elastomer hinge fixed to said central anchoring fixture by a center post clamp such that two opposing sections of said elastomer hinge are formed on opposing sides of said center post clamp, at least one disc member attached to each said opposing section of said elastomer hinge to form a valve plate, said valve plates each pivotable about said center post clamp into an open and a closed position;

a stop pin attached to said central anchoring fixture or center post clamp normal to said upper surface of said central anchoring fixture and extending between said valve plates, said stop pin preventing each valve plate from pivoting beyond said stop pin.

9. The check valve of claim 8 wherein two disc members are attached to each opposing section of said elastomer hinge to form said valve plates.

10. The check valve of claim 9 wherein said valve plates are substantially D-shaped.