Abstract: A hydraulically-actuated brake system for off-road, heavy vehicles that includes separate accumulators for braking the front and rear brakes and brake valves that are both manual and pilot actuated for controlling the flow of hydraulic fluid from the accumulators to the brakes. Also included are valves for comparing the pressure in the front and rear accumulators so that, should one of the systems become low, the brakes are immediately set. Also included is a manual valve for overriding the brake valves in the event that a malfunction occurs in one of the brake valves.

Abstract: An improved method and apparatus for supporting a cutting member in a drag bit wherein the cutting member includes a cylindrical stud or body having an angularly disposed cylindrical portion projecting therefrom with a cutting wafer bonded to the face of the cylindrical portion. A hole is formed in the bit body with an angular recess intersecting the hole. The recess conforms generally to the configuration of the cylindrical portion so that in the preferred form of the invention, the bit body engages the cylindrical portion to prevent rotation of the cutter in the bit body. Also, the engagement between the bit body and the cylindrical portion occurs in such a matter as to avoid a contact between the bit body and the wafer thus avoiding imposing stresses on the cutting wafer. The engagement aids in preventing fluid erosion and in orienting the cutting member in the bit body during assembly.

Abstract: A dual bore well treating tool having a pressure operated valve therein that is useful in conjunction with a dual bore packer and with a dual bore on and off or connection tool. One of the bores through the on/off tool, the treating tool and the packer is utilized for producing oil and/or gas from the well bore, and a second bore is utilized for opening the valve and for simultaneously injecting a treating material into the fluid being produced.

Abstract: The apparatus for making plastic containers having decreased gas permeability includes a chamber, an ionizing source located in the chamber for ionizing a material to be deposited on the containers, and a screen located between the ionizing source and the containers for preventing damage to the containers by heat generated by the ionizing source. The method includes the step of locating a screen between the ionization source and the container whereby heat generated by the ionization source will not damage the container.

Abstract: Apparatus for producing open ended plastic containers having decreased gas permeability that includes a vacuum chamber and a pump for regulating the pressure therein, an ionization source mounted in the chamber proximate the container's open end and a container holder located in the chamber. The container holder has a hole aligned with the open end and may include a shield that encompasses the exterior of the container and may include a magnet setting up a magnetic field on the exterior of the shield. In the method, a container is placed on the container holder in the chamber with the open end and hole aligned and with the shield and magnet located as described above. The coating material is vaporized and ionized so that the ionized material is deposited on the interior wall of the container.

Abstract: Apparatus for forming deep containers from a thermoplastic material including a first mold portion having a cavity therein defining the side and bottom configuration of the container and a second mold portion having a plunger provided for reciprocation therein and arranged so that the plunger moves into the cavity. The first mold portion is provided with a first passageway that terminates adjacent to the cavity and in the parting surface of the mold portion and a second passageway that extends therethrough into the cavity adjacent to the bottom of the container. A control apparatus is provided that directs a vacuum through the first passageway securely holding the thermoplastic against the parting surface of the first mold portion.

Abstract: Disclosed is heat exchange apparatus for controlling the temperature of a resin after leaving an extruder and prior to extrusion through a die in an extrusion process, comprising a heat exchanger having an inlet and outlet for an extruded heat-plastified resin and an inlet and an outlet for a heat exchange medium to be circulated in heat exchanging relationship with the extruded resin; a selective heater for receiving the heat exchange medium from the heat exchanger, the heater heating the heat exchange medium to a predetermined temperature during a start-up phase of the heat exchange device; a cooler adapted for receiving a portion of the heat exchange medium from the heater, the cooler including an inlet and an outlet for the heat exchange medium and an inlet and an outlet for a cooling medium to be circulated in heat exchanging relationship with the heat exchange medium; control means interposed between the heater and the cooler for selectively directing a portion of the heat exchange medium to said cooler

Abstract: An improved flow control valve apparatus for pneumatically powered tools that include a motor and feed and retract apparatus driven by the motor. The control valve apparatus includes a main flow valve and a retract control valve each of which is controlled by the control valve to provide air to the motor, to automatically stop the feed and retract motion of the tool, and to stop the tool completely when desired.

Abstract: An injector device for use in forming multilayer extrusions of plastic resins and a method for forming such extrusions. The apparatus includes an injector member that divides the extrudate from the first extruder into two layers and receives at least one extrudate from an additional extruder that is interposed by the injector member between the divided layers of the extrudate from the first extruder. The process includes producing plasticized resin by a first extruder, dividing the extrudate into two layers, producing extrudate from a second extruder, and injecting such extrudate between the two layers of the first extrudate.

Abstract: The automatic feed drill includes a spindle mounted therein for rotating in reciprocating movement. The spindle is rotated by spindle rotation gear that is engaged with the main drive gear which is ultimately driven by an air motor or the like. The feed and retraction movement (reciprocation) is caused by a spindle feed gear that is threaded onto the spindle. The spindle feed gear is engaged with a feed gear which, during feed movement, is driven by the main drive gear, and during retraction movement, is shifted into a position wherein the feed gear is prevented from rotating. The spindle also carries a collar or other abutment that engages a shift lever at the end of the feed movement. The shift lever is moved by the collar, and, due to its interconnection with the feed gear, moves the feed gear out of engagement with the main drive gear and into the position wherein it is prevented from rotating. The apparatus also includes a yieldable stop device that holds the feed gear stopped during retraction movement.

Abstract: The automatic feed drill includes a spindle mounted therein for rotating and reciprocating movement. The spindle is rotated by a spindle rotation gear that is engaged with the main drive gear which is ultimately driven by an air motor or the like. The feed and retraction movement (reciprocation) is caused by a spindle feed gear that is threaded onto the spindle. The spindle feed gear is engaged with a feed gear which, during normal feed movement, is driven by the main drive gear, and during retraction and rapid feed movement, is shifted into a position wherein the feed gear is prevented from rotating. During rapid feed the motor direction is reversed by a reversing valve. The apparatus also includes a yieldable stop device that holds the feed gear stopped during retraction and rapid feed movement.

Abstract: The container closure and sealing apparatus includes opposed and oppositely rotating screw feeders for moving the containers from the feed conveyor to tacking apparatus which exerts sufficient force on a tape of pre-punched covers to dislodge a cover from the tape and temporarily secure the cover to the container. An infeed indexing apparatus works in timed coordination with the tacking apparatus and with the heat sealer to remove the containers from the screws and deposit the containers onto the heat sealer where localized heat is applied to the container and cover to perform the permanent sealing and securing of the cover to the container. The heat sealer transports the containers to an indexing ejector which works in timed relationship therewith to move the containers from the heat sealing assembly to a discharge conveyor.

Abstract: The bottle carrier includes an upper support having a plurality of resilient neck engaging fingers that are aligned with a like number of bottom engaging members carried by a lower support. The upper and lower supports are held in spaced relationship by a pair of spacer members so that bottles placed in the carrier are engaged by the bottom engaging members in the concave bottom of the bottle and engaged at the neck by resilient fingers. The carrier is preferably constructed from a high impact styrene.

Abstract: Disclosed is an apparatus for extruding thermoplastic compositions comprising an extruder, a die, and a cooling device positioned between the extruder and the die for cooling the heat plastified resinous composition exiting from the extruder to a uniform temperature desired for extrusion through the extrusion die. The cooling device includes at least one enclosed flow path for conveying the resinous composition from the inlet of the cooling device to the outlet of the cooling device, structure for circulating a cooling medium about the entire circumference of each of the resin flow paths, and flow control orifices at the inlet and the outlet of the cooling means across the entire cross-section of each of the resin flow paths.

Abstract: A can carrier suitable for carrying a six-pack of cans including a top plate, bottom plate and spacer holding the top plate and bottom plate in relative position. Each part can be constructed from a sheet of plastic. The top plate and bottom plate each include arcuate recesses defining arcs of greater than 180.degree. to contain the cans. The recesses in the top plate are such that the can body is closely received therein and the can is prevented from dropping from the carrier by the engagement of the top flange on the can with the top plate of the carrier.

Abstract: The improved dwell and depth attachment includes an elongate housing that is attached to a drill motor and has an output shaft that is movable longitudinally and rotatably in the housing for rotating a drill bit. A drive spindle is connected with the output shaft and extends through the housing. An elongated sleeve encircles the spindle and has an end that is engageable with the work piece. An adjustable depth control located within the housing is connected for movement with the spindle. A first portion of the control includes a threaded interior and has ten circumferentially spaced, radially extending holes therein. The control also includes a second portion that has a threaded exterior mating with the first portion and has ten slots equally spaced about the exterior. A stop screw or the like is removably located in one of the radial extending holes in engagement with the second portion.

Abstract: The process for making thin wall containers from plastic resins described herein includes the step of heating the resin, placing the resin between a product mold and a preform mold, and closing the molds thereon. It also includes the steps of applying a differential pressure across the resin to force the resin into the preform mold and applying pressure on a movable piston in the preform mold that forces the resin relatively into the product mold. As pressure is applied internally of the product being formed, the container is shaped in the desired configuration and during such formation, is biaxially oriented to improve the strength characteristics of the container.

Abstract: Apparatus is disclosed for the formation of pipe comprising one or more layers of thermoplastic resin. The apparatus comprises a die housing having a bore therethrough with a mandrel longitudinally supported within the bore by radial members extending from the inside surface of the bore to provide an annular extrusion passageway defined by the inside surface of the housing and the outer surface of the mandrel. The housing includes therein a plurality of electrically resistive heating elements longitudinally positioned parallel to the extrusion passageway to selectively heat the thermoplastic material flowing therethrough in proximity to the heated section thereby increasing the laydown of thermoplastic material. Also included in the housing is plurality of radially adjustable elements having electrically resistive heating elements therein to radially reposition a moveable discharge sleeve held therebetween thereby controlling the wall thickness of the thermoplastic material passing in proximity thereto.

Abstract: The apparatus for making thin-walled containers from plastic resins includes a heater for raising the temperature of the resin sheet, a product mold and a preform mold located in axial alignment and movable relative together. The preform mold includes a reciprocal piston that is arranged, when the molds are closed on the resin sheet, to be moved in response to fluid pressure to force the sheet into the product mold while gas pressure is applied to the interior of the sheet to force the resin sheet into the final product configuration. The elongation of the sheet by the piston and the radial deformation caused by the gas, biaxially orient the material to increase the strength of the container.