Abstract: The device comprises a body (1) provided with two coaxial circular openings (3, 4) for connecting two sections of pipe, wherein each opening has an oblique seat (5, 6) receiving a wedge formed of two counter-seats (9, 10), a spherical ball (11) and a cage (12) in which the ball carries elastic means (23) which exert a pressure from said wedge on its seats (5, 6), and a rod (26) enabling said wedge to be unwedged, said ball being provided with a rotation shaft (13) and springs (18) enabling the counter-seats to be detached from the ball in the unwedged position of the wedge.

Abstract: A gas safety controlled device attached to the inlet side of a conventional gas controller comprising a push button, push stem and ball valve. The ball valve is urged by high gas flow to close the gas controller inlet the gas controller outlet has overflow demand. The push button and associated push stem can be pushed downwardly on the ball valve to open the gas controller inlet.

Abstract: A shear valve which controls the flow of a fluid from one of two different sources to a using apparatus upon application of pressure to a piston which severs the shear sections of the valve. One of the two sources of fluid may be self-contained as an integral part of the shear valve.

Abstract: A high pressure free floating ball valve wherein a pair of operating stems interconnect with slots on the hall to allow relative movement there between.

Abstract: An improved inlet duct for a cartridge type control valve which includes, a cup-like member having a bottom wall and a side wall defining the fluid transfer chamber in said control valve, is formed from a tubular member having a J-shaped configuration inverted in assembled position in the control valve, the tubular member has an inlet leg and an outlet leg continuous with the inlet leg, the inlet leg is staked in fluid tight engagement in the bottom wall of the cup-like member a predetermined distance from the side wall and defines an inlet port in the staked position extending to the exterior of the cup-like member, and an adhesive is applied between the bottom wall of the cup-like member and the exterior of the inlet leg to insure maintaining the said fluid tight seal, the outlet leg has an outlet port and in assembled position is so cantilevered into the fluid transfer chamber that the outlet port faces the bottom wall in the center line of the control valve, and an inwardly directed indentation in the sid

Abstract: A dump valve for use in a downhole motor having a spring-based piston responsive to fluid flow to close a fluid flow port and to a ball actuated force to reopen the port.

Abstract: A differential fluid pressure indicator including a bypass valve which provides an indication that the filter is in the bypass condition. The bypass valve includes a differential area piston which includes at the outlet port thereof a restriction orifice adapted to insure a predetermined stroke of the poppet in the bypass valve, thereby to insure actuation of the indicator.

Abstract: A ball valve has a movable upstream valve seat with a metal lip engageable with the valve ball under pressure generated by a bellows section or metal membrane connected between the movable valve seat and the housing. The force of fluid pressure against this moveable valve seat is relieved by operation of a bypass valve connecting opposite sides of this seat. The ball can also have a deformable metal lip.

Abstract: A hand held mechanism that can be applied to a conventional tire inflation valve on a vehicle tire to facilitate a tire deflation operation. The mechanism includes a rod-like element that automatically engages a tire check valve to open said valve for tire venting purposes. The mechanism also includes a hollow tubular called wall structure adapted to receive the sensing head of a conventional pressure gage, whereby the progress of the tire-deflation operation can be ascertained, as necessary to properly terminate the operation at a desired tire pressure. Mechanisms of the described type can be utilized on all wheels of a multi-wheeled vehicle to permit simultaneously deflation of all vehicle tires, thereby greatly reducing the time required to achieve a total tire deflation operation.

Abstract: A stem-operated fire-resistant gate valve including an improved metal-to-metal stem backseat fusible ring assemblies for facilitating automatic stem backseating at pre-selected temperatures, spring enhancement of the backseating procedure, and an improved metal-to-metal gate seat.

Abstract: In a poppet-type relief valve, including a housing having a spring guide assembly axially biasing a valve toward a seat in its inlet passageway, a soft valve seat member is coaxially disposed in the inlet passageway. The soft seat member includes a rigid surface limiting movement of the spring urged valve toward the inlet passageway and further includes a resilient ring seal positioned adjacent the rigid surface in a manner to be cushion contacted by and form a bubble tight seal with the spring urged valve before the valve contacts the rigid surface.

Abstract: A four-wheel drive agricultural tractor with independently steered ground engaging wheels supporting a flat, extensible load supportive frame includes an operator's cab that is adapted to face the direction of travel. Mounted under the frame is an internal combustion engine, clutch, and transmission which are individually controllable from the cab. A system of shafts and gears couple motive power from the transmission to pairs of wheels and a system of hydraulic steering motors are controllable from the cab for effecting either coordinated or crab steering. Fabricated of box-girders, the frame includes fixed and slidable portions that are mutually displaceable by hydraulic rams located within the frame to vary the wheelbase and tread of the tractor. The frame also includes an articulated hinged member at each end carrying a hydraulic stabilizer.

Abstract: A safety flow control device for use in a beverage distribution system of the character using pressurized gas to dispense the beverage from its containers for ensuring that the containers are not accidentally overpressurized. The device of the invention is adapted to be placed in the line which connects the pressure source to the containers for the beverage. The device embodies a rupture disc having a first side exposed to the gas used in pressurizing the containers and a second side exposed to atmosphere. Strategically positioned between the pressure inlet of the device and the pressure side of the rupture disc is a valving mechanism which is maintained in an open configuration by the rupture disc. In the open configuration the valving mechanism permits the gas to flow from the inlet into a first sub-chamber defined by the first side of the rupture disc and then outwardly through the outlet of the device.

Abstract: A gate valve is disclosed having a secondary seal, wherein the gate forms a metal to metal seal with the seat and wherein a resilient seal is moved toward the gate in a closed position to form a secondary fluid-tight seal with the gate. A device for deenergizing the secondary seal is provided in order to prevent wear of the secondary seal upon opening of the gate and also to reduce the gate drag caused by the energized secondary seal. Also disclosed is a pressure relief mechanism for the secondary seal adapted to prevent damage to the seal and a mechanism for evenly applying opposing secondary seals.

Abstract: A plurality of valve structures are incorporated in a drill pipe string for drilling a well into the earth utilizing air as the drilling fluid. A first valve is located in the drill pipe string just above the drilling bit, and an additional valve or valves are located in upwardly spaced relation within the drill collar string. Each of the valves has a valve member held in a position allowing the flow of air through the valve by a fusible support, and when the support melts, the valve member will shift to a position closing the valve. The valve just above the bit is combined with a float valve to prevent the upward flow of fluid into the drill string, while the valve or valves spaced upwardly in the drill collar string are full opening valves which allow the running of instruments through the drill string to selected locations above the bit. The additional upwardly spaced valve or valves include a flap held in a position to one side of the bore through the valve body by a fusible retainer.

Abstract: Three-piece stop valves, in both angle and straight-through forms, are disclosed comprising a valve body, resilient control sleeve and handle, with no separate fasteners or sealing elements being required. The handle and control sleeve are retained within the valve body by resilient formations on the handle which snap into a retaining groove on the valve body. Inlet line pressure resiliently biases the side walls of the control sleeve into sealing engagement with the valve bore to prevent leakage.

Abstract: A seal device for a gate valve is disclosed, in which annular members facing the front and rear surfaces of a gate valve member having a through hole are coupled to a valve cage by inner and outer bellows, each of the annular members has an annular recess formed on the side facing the gate valve member and closed by an annular mirror surface finished thin plate secured by welding to an opening thereof, the individual bellows are elongated by fluid under pressure supplied into annular spaces defined by the inner and outer bellows, and the annular mirror surface finished thin plates are strongly urged against the gate valve member by the pressure of the fluid forced from the annular spaces into the annular recesses. Edge portions of the annular mirror surface finished thin plates are to be very firmly mounted to the annular members, and the mechanical strength of the thin plates is to be increased.

Abstract: A valve assembly is provided which is particularly suitable for operation and maintenance under extreme environments. It includes a valve body, a ball valve member rotatably mounted within the valve body, a bonnet removably secured to the valve body, and seat retaining asemblies removably secured to the bonnet. Upon removal of the bonnet, the valve member and all internals are also removed as a unit so that they may be serviced at a convenient location. The seat retaining assemblies may include inclined surfaces which seat against oppositely inclined surfaces defined within the valve body. An alignment plate is secured to the seat retaining assemblies to insure proper sealing.

Abstract: A valve for sealing off pressurized fluid for an extended period comprises, a body defining a passageway, a closure member in said passageway for closing off the latter against fluid flow, a pivotally mounted arm for maintaining the closure member in its passageway closing off condition, and a catch for releasably retaining the arm in the valve closed position. In one arrangement, the closure member includes a diaphragm which extends across and divides the passageway and is arranged to burst under a sufficient pressure differential, the arm carrying a backing plate which, in its valve closed position is superimpositioned against one face of the diaphragm to prevent it from bursting.

Abstract: A vacuum gate valve includes a spreading mechanism with an actuating member extending between first and second valve plates and movable transversely of the axis of the valve, and parallelepiped spreading members disposed between the first valve plate and the actuating member and between the second valve plate and the actuating member. In the open position of the valve, the spreading members include an acute angle with the direction in which the actuating member is moved for closing the valve. When the actuating member is moved in order to spread apart the valve plates and to close the valve, the spreading members pivot about intersecting lines of contact surfaces formed in the valve plates and in the actuating member. In the closed position of the valve, the spreading members extend perpendicularly to the direction of the movement of the actuating member.