Check valve
AssigneeZama Japan Kabushiki Kaisha
InventorHideki Sasaki
Life of this patent
Estimating the term…
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.
Claims2
A check valve comprising:
- a case body in which a cylindrically shaped vale seat with a cylindrically shaped inflow opening and outlet opening formed respectively on each end, having an inner diameter larger than the inflow opening and having a predetermined length in an axial direction formed between the inflow opening and the outlet opening;
- a disk shaped valve body having an outer diameter slightly smaller than the inner diameter of the valve seat and disposed with the ability to move in an axial direction of the valve seat by a larger diameter than the inner diameter of the inflow opening;
- a support member (retainer) of the valve body disposed between the valve body and the outflow opening of the valve seat;
- and
- a support piece of the support member (retainer) protruded in the valve body direction on a disk shaped base seat where the support member (retainer) is formed centrally inserted in a circular groove formed between the outflow opening and a valve seat and on an open edge of an outflow window formed in the center of the base seat;
- wherein each support piece of the support member (retainer) supporting the valve body has a linear or planar support part on the top portion for leveling at least in a radial direction of the base seat.
Dependencies are inferred from the claim text.