Abstract: A disc valve for placement in a cylindrical housing forming part of a conduit which has a pivotally mounted disc and a valve seat that is angularly inclined relative to a plane perpendicular to an axis through the housing. The disc has a peripheral seal defined by a plurality of seal rings disposed within a peripherally open groove in the disc. The root diameter of the groove is smaller than the inner diameter of the seal rings so that the latter can float relative to the former. A lock ring securely retains the seal rings in place after the seal rings have been centered relative to the valve seat by first closing the disc and thereafter tightening the lock ring. A space between the seal rings includes generally radially oriented openings in fluid communication with a source of a pressurized medium on the exterior of the valve for applying the medium to the space between the seal rings and to thereby clean the valve seat when closing the disc.

Abstract: A new and improved ram lock for blowout preventer rams which permits locking of the ram at multiple and adjustable positions to compensate for wear on sealing elements of blowout preventer rams and increase sealing action of the ram without requiring separate special control lines. Automatic locking of the ram at a desired position, such as in adjustable sealing positions to compensate for ram elastomer wear, is obtained.

Abstract: A pre-adjusted control module comprises a bracket assembly adapted for attachment to a support structure of a construction vehicle. A control lever is pivotally mounted within the bracket assembly along with a bellcrank having a roller mounted on a first arm thereof. The roller is adapted to selectively engage either one of two notches formed on a lower end of the control lever and is biased in that direction by a tension coil spring connected between the bracket assembly and a second arm of the bellcrank. A control rod is reciprocally mounted in the bracket assembly and has its first end pivotally connected to the control lever and is adapted to have its second end connected to a self-centering valve spool of a directional control valve.

Abstract: The specification discloses a fire hydrant and valve assembly therefor including a flexible, resilient compressible, fluid-impervious sealing flange or lip formed on and extending outwardly of the main valve sealing member for supplemental sealing of both the water passageway through the main valve seat ring and between the valve seat ring and inner surface of the hydrant conduit.Also disclosed is a method for assembling a valve assembly in a fire hydrant to prevent damage to the valve assembly by using the sealing flange or lip on the sealing member to locate and guide the valve assembly through the valve seat area of the conduit as well as to lubricate that area during insertion of the valve to ease assembly and facilitate later disassembly.

Abstract: A mechanically actuated pinch valve for high pressure use which opens to a full round configuration and which closes to a leak tight locked condition. A novel valve actuating mechanism permits the full closure of the valve even with working pressures in the range of 400 psig by a relatively small rotary closing force acting through a 90.degree. arc. A linkage within the valve housing provides a decreasing pinch bar movement with increased actuator rotation so that the maximum mechanical advantage is achieved at the point of valve closure. The thrust of the line pressure, which may be carried on either side of the valve, is borne by bearings at the ends of the pinch bars which ride in grooves in the housing. The actuator automatically locks in the closed position regardless of the direction of the line pressure.

Abstract: This emergency valve comprises a thermal foamable plastics element or a valve operation gear with a built-in thermal foamable plastics element, which is functioned by thermal foaming and expansion of the built-in thermal foamable plastics, and if a fire broken out near the valve, the valve should be automatically and non-reversibly closed or opened by the valve operation gear which is functioned by thermal foamed plastics or thermal foamed plastics in itself.

Abstract: In a spraying container structure, before the sealing and blowing operations there is mounted in the valve body comprising a housing and a cover which is provided with a temporary sleeve, a closure member which is adapted to cooperate with a sealing element to close the valve. The closure member is maintained in the valve open position in the valve body during the production of the container.

Abstract: A safety pressure relief device of the reverse buckling type includes a puncturing element and a rupture disc having a groove or score line formed in the flange portion of the disc. The score line does not materially affect the rated pressure of the device during normal operation, and functions as a backup safety feature by providing a line of weakness along which the disc will tear if the pressure relief device is accidentally placed in a backward or reversed orientation with respect to the process, and/or if the cutting blades are inadvertently omitted from the rupture disc assembly.

Abstract: A coupling member for a quick-fitting pipe coupling comprising two separate fluid passages communicating each through a different port formed in the sliding socket with two series of passages formed separately in the body and the locking member, thus affording the simultaneous coupling of a double fluid circuit by using a single coupling member.

Abstract: A valve having integrity assurance means including a valve body with a flow passageway through it, the flow passageway having a circumferential valve seat and the valve body having a small diameter test opening communicating the seat with the exterior of the valve, and having a valve disc with a circumferential sealing surface supported in the body, the disc being rotatable to an open position permitting fluid flow through the valve to either side of the disc and to another position to close the valve by the contact of the disc sealing surface with the valve seat, the disc sealing surface and the valve seat having cooperative configuration to provide two spaced apart circumferential contact areas between the seat and the disc, the test opening communicating between these contact areas so that when the valve is in the fully closed position the test opening can be utilized as a means to test the integrity of the valve, that is, to insure that no leakage is occurring past the valve disc.

Abstract: A fuel injection nozzle assembly for internal combustion engines includes a nozzle holder encircled by a hollow screw for fastening the nozzle assembly to the cylinder head of the engine. The nozzle holder further includes an annular groove containing a snap ring device. Abutting the snap ring device is a retaining washer and disposed between the retaining washer and the hollow screw is a plurality of conical snap rings acting to urge the nozzle holder into the cylinder head when the hollow screw is tightened to fasten the nozzle assembly to the cylinder head.

Abstract: A pressure switching valve device including: a valve adapted to open and close an orifice defined in a valve seat; a diaphragm cooperating with the valve and so loaded as to maintain the valve in its open or closed position; and an atmospheric density compensating mechanism in engagement with the diaphragm to compensate for the opening and closing operations of the valve in response to the variation in atmospheric density, whereby the valve is opened and closed by impressing a given pressure on the diaphragm. This valve device features that the direction of a force exerted on the diaphragm so as to maintain the valve in its normally open or closed position is in coincidence with the direction of a force exerted by the atmospheric density compensating mechanism.

Abstract: The invention provides means for controlling the flow of fluids such as parenteral fluids. It comprises a body and flexing means. The body defines a passageway with opposed flexible walls which can be held in contact throughout their cross-section except for a limited region of which the cross-section varies along the body. The limited region may be formed by tapered grooves in the walls. The flexing means retains the body flexed so that the walls thereof are held in contact over a localized area of limited axial length, due at least partly to the internal stresses set up in the body arising from its flexure. The body is movable lengthwise relative to the flexing means to alter the position of the localized area and thus to alter the rate of fluid flow through the body.

Abstract: Water cock has non-freezing valve. Though temperature of the water flowing through the cock is lowered below the freezing point owing to the severe surrounding condition in the winter, the improved cock having a non-freezing valve does not stop its flowing of water. The cock has a thermo-element sensing the surrounding temperature and driving the non-freezing valve to shut and open according to the temperature. The thermo-element consists of a base portion containing heat-sensitive-material and a cylinder containing jelly-like material for transferring the expanding force of the heat-sensitive material to a shaft buried in the jelly-like material.

Abstract: A safety arrangement for a gasoline dispensing station equipped with a vapor recovery system. Gasoline vapors displaced from a motor vehicle fuel tank during filling are collected through the dispensing nozzle, and are directed first through a flexible hose attached to the nozzle and then through a pipe to an underground storage system. A preferred embodiment of a break-away valve is placed in the pipe near where it enters the ground such that in the event of an accident, as by an automobile running over the gasoline dispensing console, the break-away valve will automatically close to shut off the vapor recovery system. This minimizes the danger of an explosion or fire possibly caused by an open vapor recovery system.

Abstract: A flow control device for a fluid flow system includes a conduit having a cylindrical insert member disposed within. The insert member includes an axially-extending depression, and a flow bypass channel of progressively increasing cross-section within the depression. A roller mounted for movement along the wall compresses the wall into the depression to restrict flow to the underlying portion of the bypass channel. By positioning the roller the operative area of the bypass channel is varied to obtain a desired flow rate.

Abstract: A wire helix having adjacent turns normally spaced so that the wall of a flexible tubing will be pinched closed when placed between them has at least one pair of turns spaced far enough apart to allow the tubing to pass between them without being pinched; valving action takes place when the tubing is twisted around the helix to move it between the unobstructed position to the pinched position. In a modified form, there are two locations in the helix where the tubing may pass outwardly and then reenter the helix without being obstructed; in this form, the looped portion of the tubing lying outside the helix may be rotated about the helix in either direction to pinch it closed.

Abstract: The disclosure of this specification illustrates and teaches the use of a self contained breathing apparatus for attachment to a user's back and incorporates a plurality of tanks having a manifold between them that is common to all with a single filling block leading thereto, and a reserve system mounted at one end thereof. The reserve system comprises a poppet valve which signals a loss in pressure by closing, after which it can then be actuated to open it for supplying the remaining portion of the reserve breathing gas through the manifold.The system also has a first and second stage regulator to provide regulated breathing gas to a user. The first stage regulator incorporates a dynamically balanced piston which is supported by an O-ring that is deformed through its cross section to provide movement to the valving piston.The entire system is encapsulated within a package or casing which can be opened along a parting line thereof and which is secured by over-center latches.

Abstract: A reciprocating valve is formed with a valve stem extending through a packing box which includes an outwardly facing conical surface disposed about the valve stem. The conical surface terminates in a knife-like edge which functions to remove accumulations of foreign material from exposed portions of the valve stem. As the stem moves into the packing box, a non-metallic liner is disposed between the packing box and the valve stem for positioning the knife-like edge in close proximity to and concentric with the valve stem.

Abstract: A manifold gas valve for controlling gas flow to a burner has a diaphragm operated main valve, an electrically operated control valve, and means to delay the application of gas pressure to the main valve operating diaphragm to effect a delayed opening of the main valve. Opening of the control valve permits an immediate flow of gas to the main burner and simultaneously admits the application of gas pressure to effect a delayed opening of the main valve. The immediate flow of gas to the burner, which occurs upon opening of the control valve, is sufficient to effect reliable and timely ignition and support combustion.