Pipes and tubular conduits – With flow regulators and/or baffles – Restrictors
Patent
1987-08-05
1989-01-31
Schwadron, Martin P.
Pipes and tubular conduits
With flow regulators and/or baffles
Restrictors
137504, 137517, 137315, 138 43, 251151, 285321, F16K 1724
Patent
active
048009253
ABSTRACT:
A two-stage flow controller for use in a vehicle heating circuit including a housing defining an inlet and an outlet and a flow control chamber disposed between the inlet and outlet. A spring biased flow controller is disposed for sliding movement within the chamber towards and away from a valve seat. The flow controller includes an annular segment defining a through aperture and a plurality of axially extending legs which support the segment for sliding movement within the chamber and in predetermined alignment with the valve seat. Projections are defined on a face of the annular segment. When the fluid flow exceeds a predetermined level, the projections initially engage a valve seat surface such that a variable orifice is formed by clearance regions between a confronting face of the element and the seat. The element deforms to diminish the clearance space between the face and the seat as a function of fluid flow rate. In a preferred embodiment, the housing includes two portions that are snapped together and are maintained in their assembled positions by a resilient retaining ring. Locking lugs are supported beyond an end surface of one of the portions by a plurality of arcuate tabs which together define a segmented groove having a diameter larger than an end bore defined by the portion. The other portion is sized to fit within the end bore and includes a groove for receiving the retaining ring when compressed. When the second portion is inserted into the bore, the retaining ring expands outwardly into the segmented groove to maintain the engagement between the two portions.
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Sample of a washer-like element available commercially from Vernay Laboratories.
Hepperle Stephen M.
Ranco Incorporated of Delaware
Schwadron Martin P.
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