Abstract: A quick connect-disconnect coupling for a fluid conduit structure and method of making same are provided wherein the conduit structure has cam devices for connecting and disconnecting a coupler member and an adapter member comprising the coupling and the cam devices cooperate during disconnection of the members to provide a disconnecting movement from a first axial position thereof until a second position is reached at which second axial position the disconnecting movement is reversed and becomes an incremental connecting movement for a predetermined increment to a third axial position of the members before allowing the members to be completely disconnected, the coupling having seal means that provides a fluid-tight seal between the members during the entire time the members are being moved from the first axial position thereof to the third axial position thereof.

Abstract: Apparatus adapted to be mounted on the bed of a towing vehicle for lifting and towing disabled vehicles, particularly large vehicles. The apparatus includes an extendible boom disposed for positioning beneath the disabled vehicle and retracted for moving the disabled vehicle close to the rear of the towing vehicle. The boom is pivotable about a substantially horizontal axis on an elevator from a vertically disposed storage position to its operative position, the elevator being slidably mounted in slideways for vertical movement between the storage position and the operative positions. The elevator is supported by an extendible beam which is vertically driven for raising and lowering the elevator and which is extendible for varying the angular inclination of the elevator which may pivot relative to the slideways.

Abstract: A control mechanism suitable for actuating a power operated lock. The control mechanism includes key-engageable surfaces which are shielded from direct access by way of a key-receiving tunnel. The control mechanism is operable by means of a key having a slotted end portion pivotally attached to a shank portion.

Abstract: Method and apparatus for monitoring liquid stock in a storage tank. A prism connected by optical fibers is located at a fixed position in a tank, the volume of liquid at the fixed position being determined. A computer receives data relating to the liquid dispensed, and the liquid received, and calculates an amount of liquid in the tank at the moment the liquid passes the fixed prism. The calculated data is compared to the exact volume data received from the prism.

Abstract: A coupling apparatus specifically designed for an elbow of a fluid distribution system has a pair of rollers which are rotatable about first rotary axes which are movable with respect to the elbow and second rotary axes which move the first rotary axes in an arcuate path. The rollers selectively engage a locking groove of a second pipe section. The locking groove has arcuate portions with a radius equal to that of the rollers.The rollers are generally moved in unison but are permitted a small range of independent movement to insure locking of both rollers in the locking groove in the event of slight misalignments due to manufacturing tolerances.

Abstract: An elevator system has a selector mechanism driven by a cable loop attached to the elevator car. The opposite cable ends are wound on a take-up drum, in opposite rotational directions, in sequential rows across the drum, such that the cable leads travel back and forth across the drum as the drum rotates. A selector cable guide includes a frame pivotable about an axis generally perpendicular to the drum axis. The frame is disposed about the drum, and has a pair of pulleys mounted adjacent to the pivot axis, and a second pair of pulleys mounted to the frame on the opposite side of the drum. Each cable portion is guided about one of the first pulleys, thereafter about one of the second pulleys, and is thereafter wrapped onto the drum. The second pulleys swing laterally to follow the position of the cable leads as they travel across the drum, whereas the first pulleys remain relatively stationary for directing the cable portions up and down the elevator shaft from a relatively constant position.

Abstract: Integrated flapper check valve assembly consisting of cylindrical flapper check valve housing with valve seats and air passage ports, cylindrical flapper check backer with air passage ports, and intermediate flapper check valve with flat multi-leaf design.

Abstract: A fluid dispensing nozzle has a retainer secured onto its peripheral surface of the nozzle's discharge spout. This retainer extends radially outward from the spout and is designed to engage a radially inwardly extending lip about a fill tank opening to secure the spout in the fill tank opening when the nozzle is operated in an automatic mode. The retainer is secured onto the spout by an annular groove in the spout and a retainer ring fitted in the groove. The retainer is abutted against the retainer ring and means are provided to prevent axial movement of the retainer relative to the spout once the retainer is so abutted.

Abstract: A gas metal arc welding gun includes a power cable in which the power conductors are asymmetrically distributed in a crescent between a gas conduit and a sheath in order to improve flexibility of the power cable. The welding gun includes a head assembly which includes a head that defines an internal annular ridge between a contact tip and a free end of an electrode liner. This annular ridge serves as a stop for the contact tip, as a centering guide for the electrode liner, and as a shield to protect the electrode from welding spatter. The welding gun includes a two-piece handle which includes a tongue and aperture guide at one end, and an interlocking flange guide at the other end. The two guides restrict movement between the two housing parts to axial movement, and a snap ring locks the two housing parts in a desired assembled position.

Abstract: A liquid level control including a housing for attachment to an opening in a vessel, the housing having an inner chamber with a float extending therefrom, the float responding to changes in liquid level within the vessel, and an outer chamber including a valve for opening and closing an air flow passageway to provide a pneumatic signal in response to the liquid level changes. The housing has a rotatable shaft extending through the wall separating the inner and outer chambers. The valve includes an elastomeric seat which is easily accessable for inspection and is easy to replace.

Abstract: A valve formed of a body having a flow passageway therethrough defining an annular valve seat, a valve disc member positioned in the flow passageway movable between a closed and open position, the disc having a peripheral sealing surface which engages the valve seat when the valve is closed and a valve stem axially and rotatably received in stem openings in the valve body, the stem extending within the flow passageway, the valve disc being between the stem and the valve seat and boss portions having slots therein extending from the disc rearward surface to either side of the valve stem, each boss portion having aligned upper and lower slots in parallel planes intersecting the plane of the disc sealing surface at an acute angle, and pin members extending from the stem received in the upper and lower slots so that when the pin member is axially displaced the disc is moved to and away from the seat and when it is moved away from the seat, the disc may be rotated without contacting the sealing ring to open the va

Abstract: A quick connect-disconnect coupling for a fluid conduit structure and method of making same are provided wherein the conduit structure has cam devices for connecting and disconnecting a coupler member and an adapter member comprising the coupling and the cam devices cooperate during disconnection of the members to provide a disconnecting movement until a particular position is reached at which position the disconnecting movement is reversed and becomes an incremental connecting movement for a predetermined increment before allowing the members to be completely disconnected and in the event fluid under pressure is present in the conduit structure which has the coupler and adapter members connected therein the connecting movement of the cam devices is subjected to resistance by the fluid under pressure with the resistance being transmitted through the cam devices as an opposing force which serves to impede the incremental movement by resisting any opening force applied to the cam devices with such opposing forc

Abstract: An improved butterfly valve in which the body flow passageway receives a pair of seat ring retainers, each retainer having a cylindrical sidewall with planar rearward faces and with planar rearward faces which are at an acute angle to the plane of the rearward end faces, the forward end faces having a groove therein. When the retainers are assembled within the valve body a toroidal seat ring can be received in the groove between the retainers. A disc having a circumferential sealing surface is rotatably supported in the valve body to close against the seat ring.

Abstract: Flow through a vapor recovery nozzle is stopped when the liquid in a tank being filled reaches a predetermined level to cause a first diaphragm, which forms a wall of a first chamber, to move a latch release mechanism against the force of a single spring. Flow through the nozzle also is stopped when pressure in the tank being filled exceeds a predetermined pressure through movement of a second diaphragm, which is disposed in a plane substantially perpendicular to the plane of the first diaphragm and forms a wall of a second chamber connected by two separate passages to a vapor return passage communicating the tank with vapor recovery equipment, to cause movement of the latch release mechanism in the same direction and against the force of the same spring. The first diaphragm is prevented from moving in response to the pressure in the tank increasing. The exterior of each of the first and second diaphragms is exposed to ambient pressure.

Abstract: Improved apparatus for providing both a liquid level control and a low water cut-off for boilers and the like, having only a single probe and a single relay.

Abstract: A valve formed of a body, adapted to be clamped between flanges in a pipeline, having a flow passageway therethrough defining an annular valve seat, a valve disc assembly positioned in the flow passageway and movable between a closed and an open position, the disc having a peripheral sealing surface which engages the valve seat when the valve is closed and is turned 90 degrees so that its plane is parallel to the axis of the flow passageway, when it is open. A valve stem is provided and means for axially moving the valve stem through two coaxial valve stem openings in the body. Two cam systems are provided on the valve stem. The first serves to move the valve towards or away from the valve seat as the stem moves axially. The second serves to turn the valve stem through an angle of 90 degrees due to further axial motion of the stem. The valve disc assembly is supported on the valve stem such that it can be moved in a direction perpendicular to the axis of the stem, but cannot rotate with respect to the stem.

Abstract: A light mounting assembly for mounting safety lights on a towing vehicle includes a light carrying portion pivotably mounted to an attaching portion for pivoting the light carrying portion from a disposition normally on the top of the winching frame of the vehicle into a retracted position between the winching frame and the cab of the vehicle. The attaching portion includes a pair of bracket members adapted to be secured to the winching frame intermediate the frame and the cab and includes a rod rotatably carried by and spanning the attaching bracket members. A pair of cam members are fastened to the rod adjacent the attaching bracket members. The light carrying portion has two end members interconnected by a central support bar, and an arm fastened to each end member pivotably connects the end member to the respective attaching bracket member.

Abstract: A static leak seal assembly for use in a conventional compressor for preventing high pressure gas leakage from occurring through the spaces between a movable piston rod and a frame of the machine when the rod is motionless is disclosed. A piston is mounted on the rod for axial movement between retracted and extended positions. A follower ring is disposed around the rod and is likewise movable in an axial direction along the rod between retracted and extended positions in response to corresponding movement of the piston. When moved to its extended position by the piston, the follower ring engages a compressible, resilient collar to compress a neck of the collar inwardly against the rod to effect a substantially fluid tight seal therearound. The ring is separate and distinct from the piston to permit the former to adjust in radial disposition about the rod to uniformly compress the collar neck against the rod around the entire periphery of the latter.

Abstract: An information center for gasoline dispensing nozzles utilizes a molded plastic disc having a top message surface and a central body portion which extends through a snug-fitting scuff guard of a gasoline nozzle. A flange about the lower surface of the disc entraps the disc between the scuff guard and the nozzle so that the disc is retained easily, without the need for fasteners or tools. Informative indicia is applied to the top exposed surface of the disc by means of pressure sensitive labels, silk screen printing, molded letters and logos, and the like.

Abstract: Air pressure actuated locking power clamp released from static loaded condition by air pressure no greater than locking pressure notwithstanding a differential smaller release pressure area due to piston rod of air cylinder. Highly pressurized needle bearings in straight track portions of the clamp which actuate links connected to a pivoted clamp arm are critical elements in providing unexpected low pressure release.