U.S. patents available from 1976 to present.
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Class 138/45 - Variable restriction


Subclass of Class 138 - Pipes and tubular conduits
Definition: Devices wherein the restrictor is adjustable to vary the
No. of patents: 373
Last issue date: 05/01/2012


                  10  
NumberTitleIssue Date
3978776Chimney for exhaust gas having means for throttling a flow of exhaust gas
The upper end of the chimney supports an outer upwardly converging funnel and an inner coaxial upwardly converging funnel which are movable relative to each other to open and close an auxiliary annular channel for exhaust gas flow. The drive for moving th...
09/07/1976
3973410Disc-type automatic expansion valve for refrigerant
An automatic expansion valve for controlling refrigerant flow from a condenser to an evaporator in which the valve includes an apertured deflectable disc which defines the refrigerant expanson orifice with other structure within the valve, and with the fl...
08/10/1976
3970105Toroidal pressure regulator
A pressure regulator particularly adaptable for use in aerosol cans in which a chamber is provided having inlet and outlet ports, and a pressure reactive diaphragm, and a dimensionally changeable inlet throttling body, positioned in the chamber, is dimens...
07/20/1976
3970253Flow area modulator and flow deflector
This device is essentially a butterfly type valve which acts as a flow constriction by rotating a disc body with its planar axis parallel to or at right angles to fluid flow through a channel. The disc body has an additional capability of extending sector...
07/20/1976
3955594Pressure operated valve systems
Fluid flow through a conduit is controlled by varying the pressure of the fluid. The fluid passes through a normally closed valve comprising a flexible sleeve held in pinched closed condition by an elastic material which is isolated from all pressures exc...
05/11/1976
3954013Variable opening device
A resilient tube of predetermined length, inside diameter and outside diameter has embedded therein, in axial relation, a helical winding of substantially non-resilient material. The helix is effective to resist forces exerted on the walls of the tube by ...
05/04/1976
3952535Automatic expansion valve for refrigerant
An automatic expansion valve for controlling refrigerant flow from a condenser to an evaporator in which the valve includes a deflectable member which defines a refrigerant expansion orifice with other structure within the valve, and with the flow passage...
04/27/1976
3952776Fluid flow device
A combustible mixture of air and minute fuel droplets is produced for supply to the cylinders of an internal combustion engine. This mixture is formed by accurately controlling both the atomization of fuel and the mass flow rate of air over substantially ...
04/27/1976
3951379Flow control device
A flow control device includes a resilient member defining an opening through which fluid flows, the opening becoming smaller upon increase of pressure of fluid supplied thereto, and relatively larger upon decrease of pressure of fluid supplied thereto. A...
04/20/1976
3949025Variable throat venturi apparatus for mixing and modulating liquid fuel and intake air to an internal combustion engine
Discharge velocity of the air-fuel mixture being supplied through a variable venturi flow passage device to an internal combustion engine at idle to near idle operation of the engine is optimized by controllably varying the area ratio between the throat a...
04/06/1976
3942951Contact plate for mass-exchange apparatus
The contact plate for mass-exchange apparatus consists of two disks facing each other with their end surfaces and capable of mutual rotation round the axis thereof. Each disk has one slit-like hole shaped as an Archimedean spiral so that when one disk rot...
03/09/1976
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