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.
Claims20
A check valve comprising:
- a case body in which a cylindrically shaped valve seat with a cylindrically shaped inflow opening and outflow opening formed 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 opening and the outflow opening;
- a disk shaped valve body having an outer diameter smaller than the inner diameter of the valve seat, the valve body being moveable in the axial direction within the inner diameter of the valve seat;
- a support member of the valve body disposed between the valve body and the outflow opening of the valve seat;
- and
- a plurality of support pieces of the support member protrude from a disk shaped base seat of the support member in a valve body direction and are formed centrally on an open edge of an outflow window formed in the center of the disk shaped base seat, wherein the support member is inserted in a circular groove formed between the outflow opening and a valve seat;
- wherein each of the plurality of support pieces of the support member supporting the valve body has a linear or planar support part on a top portion for linearly leveling the valve body at least in a radial direction of the base seat, and wherein the linear or planar support part of each of the plurality of support pieces of the support member extends from the open edge of the outflow window to a location adjacent to an inner circumferential surface of the inner diameter of the valve seat.
A check valve comprising:
- a body having a valve seat, the valve seat having one or more internal walls defining a cavity extending axially along a longitudinal axis between an inflow opening and an outflow opening, the valve seat having a cross-sectional area larger than a cross-sectional area of the inflow opening;
- a valve body having a cross-sectional area smaller than the cross-sectional area of the cavity and being moveable in the axial direction within the cavity of the valve seat;
- a support member being disposed between the valve body and the outflow opening of the valve seat;
- and
- a plurality of support pieces of the support member, the plurality of support pieces are positioned about an outflow window formed in a base of the support member and protrude from the base in a valve body direction, the base of the support member being inserted in a groove formed between the outflow opening and a valve seat;
- wherein each of the plurality of support pieces of the support member support the valve body on a linear or planar support part on a top portion for linearly leveling the valve body at least in a radial direction of the base, and wherein the linear or planar support part of each of the plurality of support pieces of the support member extends from an open edge of the outflow window to a location adjacent to an inner surface of the one or more walls of the valve seat.
Dependencies are inferred from the claim text.