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US 4,245,668 AGranted
Pressure regulator
AssigneeChemetics International Company Ltd.
InventorBengt A. Lindstrom
Life of this patent
Estimating the term…
Abstract
A pressure or vacuum relieving device intended as a large capacity inbreathing or outbreathing apparatus for equipment and/or piping, operating under low to moderate gas pressure or vacuum, e.g. 1 to 15 psig pressure or 0-5 psi vacuum. The principal feature is that a required set pressure is provided hydrostatically by means of a liquid leg acting an a bellows expansion joint. The device is suitable for use in Pulp Mill Digester Blow Steam Systems and similar applications.
Claims7
A pressure regulator comprising:
- (a) an elongated vertically disclosed housing having, a closed top and an open bottom;
- (b) an inlet conduit projecting axially into the housing through the bottom end thereof;
- (c) means connecting, and sealing the space between, the inlet conduit and the housing at or near the bottom end of the latter;
- (d) an outlet conduit;
- (e) a bellows expansion joint hermetically closed at both ends and vertically disposed into the housing, the upper end thereof being fixed to the inside of the housing and the lower end compressively resting on the top end of the inlet conduit;
- (f) sealing means between the lower end of the bellows expansion joint and the top end of the inlet conduit;
- (g) an enclosed head tank mounted outside the housing and above the bellows expansion joint;
- (h) a conduit connecting the bottom of the head tank to the top of the bellows expansion joint;
- (i) a hydraulic fluid filling the bellows, conduit (h) and part of the head tank;
- (j) a conduit connecting the unfilled part of the head tank to atmosphere, and
- (k) means closing the latter conduit upon a rise of the hydraulic fluid level in the head tank.
8 more elements
Dependencies are inferred from the claim text.