CHECK VALVE

• US 3,831,629 A
• Filed: 01/24/1972
• Issued: 08/27/1974
• Est. Priority Date: 01/24/1972
• Status: Expired due to Term

• Current Assignee: George E. Lardner, Glenn H. Mackal
• Original Assignee: George E. Lardner, Glenn H. Mackal
• Inventors: Mackal, Glenn H., Lardner, George E.
• Primary Examiner(s): Nilson, Robert G.
• Application Number:
  US05/219,974
• Time in Patent Office: 946 Days
• Field of Search: 137/525,528,535,540,533.17,DIG.4 251/149.7
• US Class Current: 137/843
• CPC Class Codes: A61M 2039/2473 Valve comprising a non-deformable, movable element, e.g. ball-valve, valve with movable stopper or reciprocating element
• CPC Class Codes: A61M 2039/2486 Guided stem, e.g. reciprocating stopper
• CPC Class Codes: A61M 25/10185 Valves
• CPC Class Codes: A61M 39/24 Check- or non-return valves
• CPC Class Codes: F16K 15/14 with flexible valve members
• CPC Class Codes: F16K 15/142 the closure elements being shaped as solids of revolution, e.g. toroidal or cylindrical rings
• CPC Class Codes: Y10S 137/903 Rubber valve springs
• CPC Class Codes: Y10T 137/7879 Resilient material valve
• CPC Class Codes: Y10T 137/7922 Spring biased

Abstract

Two-piece check valve having a sleeve-like valve body and a valve element reciprocable therewithin, the valve element having an elastomeric rear end portion integral therewith which is held in axial compression, whereby constantly to urge the valve element forwardly toward valve-closed position. The rear end of the valve body is crimped radially inwardly to form a fluidpassing abutment for the rear end portion of the valve element. The valve also incorporates a novel means for guiding the valve element for reciprocation within the valve body, while maintaining it concentric with respect thereto.

Claims

1. A two-piece check valve having a sleeve-like outer valve body with a longitudinally extending passage therethrough, a valve element reciprocable longitudinally relative to the valve body within the passage therein, cooperating valve seats in the passage in the valve body and on the valve element, respectively, the main portions of the surface of the passage in the body of the valve and the outer surface of the valve element being spaced radially from each other, the valve having interengaging angularly spaced guide means on the valve body and valve element extending through a substantial part of the axial length of the valve element, said guide means maintaining the valve element concentric with the valve body, concentric longitudinally extending axially compressible resilient valve element-biasing means, and abutment means on the valve body compressively engaging the rear end of the biasing means constantly to urge the valve element toward valve closed position, the abutment being a radially inwardly crimped circumferentially continuous rear end wall portion of the valve body having angularly spaced zones folding radially inwardly to overlie overlying the rear end of the biasing means.

2. The valve of claim 1, wherein the abutment has equally angularly spaced zones which are partially folded on themselves in a forward direction, said spaced folded zones having uniformly spaced peaks compressively engaging the rear end of the biasing means, opposite confronting edges of the folded wall portion being substantially radially spaced from each other, the areas between the folded zones forming fluid flow channels.

3. A valve according to claim 1, wherein the crimped rear part of the valve body containing said folded zones is of reduced wall thickness as compared to the remainder of the valve, the rear part of the valve body being initially joined to the remainder of the valve body at an abrupt external annular shoulder.

4. A valve having a sleeve-like valve body with a longitudinally extending passage therethrough, a valve element reciprocable longitudinally relative to the valve body within the passage therein, cooperating valve seats in the passage in the valve body and on the valve element, respectively, the main portions of the surface of the passage in the valve body and the outer surface of the valve element being spaced radially from each other, the valve having interengaging guide means on the valve Body and valve element extending through a substantial part of the axial length of the valve element, said guide means maintaining the valve element concentric with the valve body, said guide means comprising radially projecting lands on one of the members consisting of the valve body and valve element slidably engaging the other of said members, the valve element being rotatable about its longitudinal axis with respect to the valve body, the lands being on the valve element and slidably engaging the wall of the passage through the valve body, longitudinally extending grooves in the side wall of the valve body paralleling the lands on the valve element, the lands being equally angularly spaced about the axis of the valve body, and the numbers of lands and grooves being different.

5. A valve according to claim 4, wherein the lands have a circumferential width substantially greater than the circumferential width of the grooves, whereby substantially equally angularly spaced engaging guiding zones between the valve body and valve element are assured in all positions of turning of the valve element relative to the valve body about their common longitudinal axis.