Check valve

Abstract

A check valve that can prevent sticking of a valve body and reliably perform an opening and closing action in a check vale having a simple structure and that does not use biasing means on the valve body. A check valve has support pieces of a valve body protruding in the valve body direction on a circular base seat forming an outflow window in the center inserted in a circular groove where a support member (retainer) is formed between an outflow opening and a valve seat and on an open edge of the outflow window formed in the center of the base seat, and the support pieces of the support member (retainer) that support the valve body have linear or planar support parts on the top portion for leveling at least in a radial direction of the base seat.

What is claimed is: 
     
         1 . A check valve comprising:
 a case body in which a cylindrically shaped valve seat with a cylindrically shaped inflow opening and outlet opening formed respectively on each end, having an inner diameter larger than the inflow opening;   a valve body disposed and axially movable within the valve seat, the valve body having an outer diameter slightly smaller than the inner diameter of the valve seat;   a support member disposed between the valve body and the outflow opening of the valve seat, the support member comprising a plurality of support pieces protruding toward the valve body, each of the plurality of support pieces extending in a non-radial direction of the support member.   
     
     
         2 . The check valve of  claim 1 , wherein the support member and the plurality of support pieces are one integrated piece. 
     
     
         3 . The check valve of  claim 1 , wherein the plurality of support pieces comprises a linear support area that extends beyond an outer perimeter of the valve body. 
     
     
         4 . The check valve of  claim 3 , wherein the valve body is in spaced relation with a top surface of the valve seat and supported by the linear support area of the plurality of support pieces in a level orientation at least in a radial direction when the check valve is in an open state. 
     
     
         5 . The check valve of  claim 1 , wherein the valve body abuts a topsurface of the valve seat when the check valve is in a closed state. 
     
     
         6 . The check valve of  claim 1 , wherein the plurality of support pieces of the support member are positioned in spaced relation with the inner diameter of the valve seat forming a gap there between. 
     
     
         7 . A carburetor comprising:
 a body;   a fuel passage positioned within the body; and   a check valve positioned within the fuel passage, the check valve comprising:
 a case body having an inflow opening, 
 an outflow opening larger than the inflow opening, 
 a valve seat positioned between the inflow and outflow opening, 
 a valve body larger than the inflow opening and movable between the valve seat and a support member, 
   wherein the support member removably positioned between the valve seat and the outflow opening, and wherein each of the plurality of support pieces extending in a direction perpendicular to an axial direction of the support member.   
     
     
         8 . The carburetor of  claim 7 , where in the valve seat is cylindrically shaped with cylindrically shaped inflow and outflow openings formed at opposing ends respectively on each end of the valve seat, the valve seat having an inner diameter larger than
 the inflow opening and a predetermined length in an axial direction formed between the inflow and outflow openings; and   wherein the valve body is having an outer diameter smaller than the inner diameter of the valve seat, the valve body being movable in the axial direction within the inner diameter of the valve seat;   wherein the plurality of support pieces are formed centrally on an open edge of an outflow window formed in the center of the disk shaped base seat;   wherein each of the plurality of support pieces has a linear support part on a top portion for linearly leveling the valve body at least in a radial direction of the base seat.   
     
     
         9 . The carburetor of  claim 8 , wherein the linear support part of each of the plurality of support pieces of the support member extends beyond an outer perimeter of the valve body. 
     
     
         10 . The carburetor of  claim 7 , wherein the base seat and the plurality of support pieces are integrally form from one piece construction. 
     
     
         11 . The carburetor of  claim 7 , wherein the support member comprises a metal. 
     
     
         12 . The carburetor of  claim 7 , wherein the support member comprises a synthetic resin material. 
     
     
         13 . The carburetor of  claim 7 , wherein the valve body is in spaced relation with a top surface of the valve seat and supported on the top portion of the plurality of support pieces in a level orientation at least in a radial direction when the check valve is in an open state. 
     
     
         14 . The carburetor of  claim 7 , wherein the valve body abuts a topsurface of the valve seat when the check valve is in a closed state. 
     
     
         15 . The carburetor of  claim 7 , wherein the plurality of support pieces of the support member are positioned in spaced relation with the inner diameter of the valve seat forming a gap there between.