US 12,292,124 B2Granted

Check valve

AssigneeIshizaki Co., Ltd.

InventorsNobuyuki Ishizaki, Takeshi Ouchi, Eiji Hara

Life of this patent

Estimating the term…

Loading patent…

Abstract

The check valve includes: an inlet pipe body part (23) which includes an inflow port (23b); an outlet pipe body part (25) which includes an outflow port (25b); a mobile body (a reciprocative body (2)). Insides of the inlet pipe body part, the outlet pipe body part, and the valve body (12) are communicated to form a curved flow path from the inflow port toward the outflow port. The reciprocative body includes a valve element (6). The seat (23c) is arranged so as to be capable of supporting the valve element and the inflow port and the seat are arranged parallel to each other. An inner wall surface (23y) on an outside-corner side of the flow path in the inlet pipe body part is formed so as to curve toward a side of the outlet pipe body part as a position gets closer from the inflow port to the seat.

Claims7

Dependent claims

An angle-type check valve in which an inflow direction and an outflow direction intersect with each other, the angle-type check valve having an outside wall thereof that forms an outer surface of the angle-type check valve, the check valve comprising:

an inlet pipe body part which includes an inflow port, the inlet pipe body part constituting a first part of the outside wall;
an outlet pipe body part which includes an outflow port, the outlet pipe body part constituting a second part of the outside wall;
a mobile body which is movable to a position where a flow of a fluid is stopped and a position where a flow of the fluid is allowed;
and
a valve body which houses the mobile body, wherein
insides of the inlet pipe body part, the outlet pipe body part, and the valve body are communicated to form a curved flow path from the inflow port toward the outflow port, the curved flow path providing an inside-corner side and an outside-corner side,
the mobile body includes a valve element,
the inlet pipe body part or the valve body is provided with a seat,
the seat is arranged so as to be capable of supporting the valve element,
the inflow port and the seat are arranged parallel to each other,
the first part at the inside-corner side of the outside wall of the angle-type check valve intersects with the second part at the inside-corner side of the outside wall of the angle-type check valve;
and
an inner wall surface on an outside-corner side of the flow path in the inlet pipe body part is formed so as to curve toward a side of the outlet pipe body part as a position gets closer from the inflow port to the seat.

10 more elements

Dependencies are inferred from the claim text.