Check valve for a self-priming pump

• US 7,784,489 B2
• Filed: 08/09/2006
• Issued: 08/31/2010
• Est. Priority Date: 08/11/2005
• Status: Expired due to Fees

• Current Assignee: Envirotech Pumpsystems Incorporated (WEIR Group PLC)
• Original Assignee: Envirotech Pumpsystems Incorporated (WEIR Group PLC)
• Inventors: Paulin, Greg, Harmon, James C., Shaw, James G., Northrup, James
• Primary Examiner(s): Rivell; John
• Assistant Examiner(s): NICHOLS, PHYLLIS M
• Application Number:
  US11/501,478
• Publication Number:
  US 20070036665A1
• Time in Patent Office: 1,483 Days
• Field of Search: 137/15.18, 137/527.2, 137/269.5, 137/527, 137/527.4, 137/527.6, 417/435, 415/113, 415/147, 415/200, 415/62, 604/174, 837/68
• US Class Current: 137/527.2
• CPC Class Codes: F04D 15/0005 by using valves
• CPC Class Codes: F04D 29/628 especially adapted for liquid pumps
• CPC Class Codes: F04D 9/008 by means in the suction mouth, e.g. foot valves
• CPC Class Codes: Y10T 137/79 Head retained by removable closure

Abstract

A check valve of the flapper type structured for use in a self-primer pump is structured for attachment to the pump casing in a manner that facilitates servicing of the check valve, and includes securement means that are positioned external to the casing and a flapper that is located through an opening of the casing in a manner that enables the servicing of the valve without dropping the flapper or the hardware into the interior of the pump.

Claims

1. A self-primer pump having a check valve, comprising:

a pump casing;

a check valve inlet;

a flapper valve located within a portion of said pump casing and positioned to register against said check valve inlet, said flapper valve having a hinge and two laterally-extending hinge pin ends for attachment of said flapper valve to an attachment apparatus;

an attachment apparatus for securing said flapper valve to said pump casing, said attachment apparatus comprising an attachment member positioned external to said pump casing and a bracket apparatus extending in a direction from said attachment member into said pump casing to engage and retain said flapper valve in position within and against said pump casing by secure engagement between said attachment apparatus and said flapper valve; and

a spacer positioned between each said hinge pin end and said attachment apparatus to provide secure engagement of said hinge pin ends against said pump casing.

2. The self-primer pump of claim 1 wherein said flapper valve further comprises a hinge block positioned on each of said two hinge pin ends to secure said flapper valve to said attachment apparatus.

3. The self-primer pump of claim 2 wherein said spacer is positioned between each said hinge block and said attachment apparatus.

4. The self-primer pump of claim 1 wherein said attachment member is a cover and wherein said two laterally-extending hinge pin ends are positioned for engagement by said bracket apparatus extending from said cover.

5. The self-primer pump of claim 1 wherein said pump casing is structured with a supporting ledge configured to receive and retain said two laterally-extending hinge pin ends therealong.

6. A self-primer pump having a check valve, comprising:

a pump casing;

a check valve inlet;

a flapper valve located within a portion of said pump casing and positioned to register against said check valve inlet, said flapper valve having a hinge and two laterally-extending hinge pin ends with a hinge block positioned on each of said two hinge pin ends for attachment of said flapper valve to an attachment apparatus;

an attachment apparatus for securing said flapper valve to said pump casing, said attachment apparatus comprising an attachment member positioned external to said pump casing and a bracket apparatus extending in a direction from said attachment member into said pump casing to engage and retain said flapper valve in position within and against said pump casing by secure engagement between said attachment apparatus and said flapper valve; and

a spacer positioned between each said hinge block and said attachment apparatus.

7. A self-primer pump having a check valve, comprising:

a pump casing;

a check valve inlet;

a flapper valve located within a portion of said pump casing and positioned to register against said check valve inlet, said flapper valve having a hinge;

two laterally-extending hinge pin ends;

a hinge block positioned on each of said two hinge pin ends; and

an attachment apparatus for securing said flapper valve to said pump casing, said attachment apparatus comprising an attachment member defining a cover positioned external to said pump casing, and a bracket apparatus extending in a direction from said cover into said pump casing to engage and retain said flapper valve in position within and against said pump casing by secure engagement of said hinge blocks by said bracket apparatus, each said hinge block being spaced from said bracket apparatus by a spacer positioned between each said hinge block and said attachment apparatus.