Abstract: A device for dissipating the accidental over-pressure of a fluid contained in an enclosure provided with a sealing membrane intended to be deformed and broken by the over-pressure comprises a mobile piston applied against the membrane subjected to the action of a spring by means of an overcenter spring mechanism having a threshold of balance which, when exceeded, causes the sudden releasing of the piston and the breaking of the membrane, the threshold being reached by the movement of the piston under the action of the deforming of the membrane. The invention applies to the protection of the enclosures under fluid pressure.

Abstract: An adjustable check valve for use in an oxygen regulator to establish limits at which a resiliently biased disc moves away from a seat to allow air to enter an atmospheric chamber. A regulator is connected to a linkage which operates an air flow valve and an oxygen proportioning flow valve. The regulator is responsive to inlet oxygen pressure such that a change in altitude causes a corresponding change in flow relationship of air through the air valve and oxygen through the oxygen valve.

Abstract: A firecheck to be connected to a combustible gas line and including a casing having a gas inlet, a gas outlet and an access opening. A cover plate removably encloses the access opening and a burner screen is located within the casing between the inlet and the outlet and is disposed in communication with the access opening. A control valve is disposed within the casing for controlling the flow of gas through the casing and is movable between an open position and a closed position. The valve is moved to the open position through a manually operated mechanism and is locked in the open position. On release of the locking mechanism the valve is biased to the closed position. Removal of the cover plate from the casing acts to release the locking mechanism to thereby enable the biasing means to move the valve to the closed position.

Abstract: Fluid flow control systems for lawn sprinkling flow control systems which include rain override means and continuously available rain alarm signals during rainfall. Provisions are provided to prevent valve flutter during light or intermittent rainfall by means of conventional time delay relays. A novel, simple, and economic hermetically sealed outdoor casing is provided. Use of unique remote transformer plug and cord insures consumer product safety compliance against electrical shock hazzard.

Abstract: A regulator device for controllably supplying liquid to a suction means, and having a gate that is adjustable to selectively block and unblock inflow conduits extending into a chamber, such that liquid outside the chamber flows into the chamber through a designated inflow conduit. The inflow conduits have outlets at different heights, the outlet height of each inflow conduit corresponding to the magnitude of suction required to draw liquid from the chamber through an outflow conduit having an inlet below a liquid level in the chamber.

Abstract: Tubing through which fluid flow is to be regulated is placed in a regulating clamp wherein it is clamped between a roller wheel and a surface having a variable cross-sectional area channel extending therealong. This surface is parallel to the travel path of the wheel, and thus there is a constant separation distance between these two elements for all wheel positions. Flow rate through the tubing is changed by longitudinal adjustment of the position of the roller wheel, the ratio of the portion of the tubing which is clamped between the wheel and the surface to that which is not clamped and over the channel, thereby being varied. A plurality of ridge elements are formed in the surface and act to locally pinch or grip the tubing at discrete intervals, thereby substantially lessening creep of the plastic tubing which, in turn, minimizes the flow rate change once the clamp has been set for the desired rate of flow.

Abstract: A valve includes a plunger which is movable by actuating means such as a solenoid coil, air pressure or other means to move a valve member toward and away from a valve seat. The fluid flow area of the valve is sealed from the actuating means by the diaphragm, O-rings or other forms of sealing structure. In order to insure against leakage past the diaphragm or seal and especially against leakage into the actuating means, the construction includes another diaphragm or seal spaced from the first seal providing a seal space between the first and second diaphragms or seals. In the event of leakage past the first sealing means, flow of the liquid into the space between the first and second sealing means causes an outward flow of the fluid through a detecting passage which thereby provides means which disclose the leakage past the first sealing means so that the first sealing means can be immediately replaced before any damage to the actuating means or to the system itself.

Abstract: A vapor pressure relief system comprising a safety valve and vent pipe movable with thermal expansion and contraction of the associated vapor generator, and a fixed exhaust pipe and drip pan, the latter having an opening to admit the vent pipe and accommodate the movement thereof, and including slidable cover plates surrounding the vent pipe and providing a closure over the drip pan opening.

Abstract: There is disclosed an annular blowout preventer wherein a packer, received within a recess about a bore through the preventer housing, is adapted to be contracted by means of a piston having an annulus of resilient material movable inwardly within a chamber surrounding the recess and divided therefrom by a wall of the housing, and a disc-shaped member of resilient material extending through and sealably slidable within a slot in the wall to transmit the inward movement of the piston to the packer.

Abstract: An easily assembled valve shifting mechanism includes a hexagonal shaft over which several different cam plates are slidably assembled in a predetermined manner. Each cam plate includes complementary cam surfaces for engaging and providing positive motion to a cam follower mounted on a valve spool. The cam surfaces of all the cam plates bear a predetermined relationship to each other to cause movement of the different valve spools in a predetermined sequence. One of the cam plates further includes detent means for defining each of the steps in the predetermined sequence.

Abstract: A method and an apparatus for imparting rotational movement to a control rod which is reciprocably inserted in a hydraulic circuit for controlling flows of fluid pressure from a pressure source to an actuator, wherein the operating fluid pressure is by-passed to a rotating mechanism which is disengageably associated with one end of the control rod, thereby driving the rotating mechanism to engage and rotate the control rod through a certain angle upon actuation of the hydraulic circuit.

Abstract: A valve mechanism is disclosed comprising valve body means with a fluid flow passage communicating an inlet and an outlet. A valve for controlling the flow of fluid through the fluid flow passage is connected to a stem which extends outwardly from the valve body. Handle means externally secured to the stem include a cam operable against the valve body for actuating the valve away from a seat within the valve body. A shut-off spring functions to urge the valve toward its valve seat. Cooperating latching means are provided on the handle means and stem to lock the parts with less than 90.degree. rotation of the handle means. Release means cooperate with the latching means to free the handle means for rotation and permit the stem to move so that the main spring can close the valve. The handle, latching means, and stem are arranged to rotate so as to permit actuation of the handle in any position about 360.degree. of the axis of rotation of the stem.

Abstract: This invention relates to the replacement of seals in ram type blow out preventers and is especially useful for replacing such seals where the well head is at a considerable distance from the drill head, for example on the sea bed. The method comprises removing a seal from a first blow out preventer ram in situ at the lower end of the well riser, and inserting a replacement shoe of smaller internal diameter itself fitted with a seal within the seal recess of the first ram.There is disclosed a shoe for a ram type blow out preventer comprising a part annular member having a part cylindrical outer surface provided with a ridge for receipt in a recess in a blow out preventer ram, means for indexing and securing the part annular member relative to the blow out preventer ram, and a seal receiving recess in the radially inner surface of the part annular member.

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 fire hydrant either of the "wet" barrel type or the "dry" barrel type having an improved hydrant nozzle construction. The barrel of the fire hydrant is provided with an internally threaded boss for receiving a replaceable externally threaded nozzle. Means for locking the nozzle to the boss of the barrel is provided so that the nozzle may not be removed by unauthorized personnel. Sealing means are provided between the nozzle and the boss of the barrel which can not lose its effectiveness due to cold flow and thus will not reduce the gripping effect of the nozzle to the barrel when the nozzle has been threaded therein with an initial torque.

Abstract: A faucet for somewhat universal usage is provided with a self-contained, replaceable cartridge unit which has a pair of pin-like valve elements and a hollow cylindrical operating cam for effecting individual and dual control of the opening and closing of a flow through a pair of inlet-seating passages, such as for cold and hot water. The cam is provided with an operating stem and knob for turning it to control the amount of flow from either of a pair of inlets and for moving it longitudinally or axially to further control flow into a mixing chamber and out through a side outlet in the cartridge. The cam may be operated selectively to provide a full or proportionate flow of either hot or cold water or of both of them. The operation of the valve elements is positively guided throughout as controlled by the operating stem and the cam and without the need for spring means or the like.

Abstract: An aspirator device is placed in an hydraulic circuit that incorporates one or more hydraulically actuated solenoid valves. The aspirator comprises a cylindrical body having a through bore for the passage of pressurized oil therethrough and a branch bore, in communication with the main bore, connected to the pilot drain of the valve. The pressurized passage of the oil in the through bore causes a negative pressure at the branch bore and the pilot drain.

Abstract: The invention is a hydrostatic device which converts rotary motion to oscillating motion for driving a sickle bar type mower by using a rotating cam plate to operate a rocker arm through a hydraulic coupling in the form of a pair of hydrostatic cylinders. The cylinders are continuously charged and due to valving openings in the pistons, the cylinders are continuously maintained in-phase with each other and the sickle bar which is being driven.

Abstract: A control damper is mounted in a building duct system for closing a control opening through a housing or frame and includes a linkage connected to the housing and to a vane positioned in the control opening and is operative for moving the vane between a flow permitting position and a position closing the control opening. The linkage includes a fusible portion permitting a resilient member to move the vane to the position closing the control opening in the event of temperature above the melting point of the fusible portion. Cooperating latch members are mounted on the housing and on the vane and are moved into vane holding engagement after melting of a fusible portion and movement of the vane to the position closing the control opening through the housing.

Abstract: There is disclosed an annular blowout preventer wherein a plurality of flexible bands are arranged about the packer within the recess about the bore through the preventer housing, and means are provided for moving the bands toward and away from the bore so as to selectively contract the packer into sealing engagement about an object in the bore or upon itself when the bore is empty or permit said packer to expand into the recess.