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US 4,257,444 AGranted
Insert check valve or the like
AssigneeTransamerica DeLaval Inc.
InventorsFrancis H. Ogle, Jr., Ernest R. Koppl
Life of this patent
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AssigneeTransamerica DeLaval Inc.
InventorsFrancis H. Ogle, Jr., Ernest R. Koppl
Estimating the term…
The invention contemplates a particular body construction and assembly for a check valve or the like whereby the entire valve assembly may be readily installed as a unit within the bore of standard pipe or conduit, or a standard fitting therefor. A single circumferentially extending radially inwardly open groove in the bore of the pipe, conduit or fitting, faces a corresponding radially outwardly open groove in the valve body, and stiffly compliant circumferentially extensive retainer element such as a wire of suitable gage substantially fills these grooves to retain the inserted valve in place. The retainer element is adapted for ready removability, to enable servicing or removal of the inserted valve, and the valve body is so externally characterized as to unambiguously assure valve installation in the correct direction of desired flow.
In combination, first means of conducting fluid flow and including a circular bore at an open end thereof, said bore having a circumferentially continuous annular groove therein at a location axially offset from said open end, and an insert valve removably seated in said bore;
In combination, first means of conducting fluid flow and including a circular bore at an open end thereof, said bore having a circumferentially continuous annular groove therein at a location axially offset from said open end, and an insert valve removably seated in said bore;
In combination, first means of conducting fluid flow and including a circular bore at an open end thereof, said bore having a circumferentially continuous annular groove therein at a location axially offset from said open end, and an insert valve removably seated in said bore;
In a check valve as an article of manufacture, comprising a cylindrically annular body which includes a diametrically extending seat post dividing the opening of said body into two like opposed generally semicircular valve-seat openings to share fluid flow in a single downstream direction through said body, and two valve members hinged to said body to open and close said openings, the improvement wherein the external surface of said body is a cylinder having a circumferential radially outwardly open seal-ring groove near one axial end, a radially outward lip formation near the other end, and a radially outwardly open retaining-ring groove between said seal-ring groove and said lip formation, said other end of said body being locally recessed to an axial extent which includes said retaining-ring groove but which is axially short of intercepting said seal-ring groove, the angular limits of said recess being less than the remaining circumferential extent of said retaining-ring groove.
Dependencies are inferred from the claim text.