Abstract: A control system for an infinitely variable transmission has a transmission ratio control valve having a spool for controlling oil supplied to a cylinder of a drive pulley to change the transmission ratio. Acceleration of depression of an accelerator pedal is detected to produce an acceleration signal. By controlling the pressure of oil supplied to the transmission ratio control valve in accordance with engine operating conditions and the acceleration signal, the spool is shifted, so that the speed of changing the transmission ratio is controlled.

Abstract: A screeding machine has hydraulic cylinders for independently raising and lowering the opposite ends of a drive roller to effect steering actions.

Abstract: An improved rotating head having an inner barrel disposed within and rotatingly supported on an outer barrel wherein a rotary drive member is connected to the inner barrel. A kelly is extendable through the inner barrel and the rotary drive member is adapted to grippingly and sealingly engage the kelly so that rotation of the kelly causes rotation of the rotary drive member and the inner barrel connected thereto, the engagement between the rotary drive member and the kelly providing the sole source for rotating the rotary drive member and the inner barrel connected thereto. The rotary head also includes a bearing adjustment assembly which facilitates the rotatability of the inner barrel.

Abstract: A well tool lock mandrel and running and pulling tools for installing and retrieving the lock mandrel. The lock mandrel is used for supporting a well tool such as a subsurface safety valve at a landing nipple in a well tubing string. The lock mandrel includes a tubular body, locking dogs supported in the body, an expander sleeve for operating the locking dogs, and a latch for releasably locking the expander sleeve when the locking dogs are locked outwardly. The running tool includes a head assembly for connection with a wireline tool string, an upper retainer key assembly for connection with the head of the lock mandrel, and a lower locking lug assembly for engagement with the expander sleeve of the lock mandrel for operating the sleeve. The running tool also includes a spring biased insertion sleeve for operating the lower locking lug assembly permitting the running tool to be installed in the lock mandrel when the locking dogs of the lock mandrel are at inward positions.

Abstract: A well packer is shown having an annular packing element surrounded on either side by axially shiftable annular shoulders. Extrusion preventing devices are located between each shoulder and the packing element to prevent extrusion of the packing material during use. The extrusion preventing devices include an outer split ring having a generally triangular cross-section defined by a cylindrical abutment surface for abutment with the outer conduit, a tapered sidewall engageable with one of the shoulders, and a planar surface which is substantially normal to the longitudinal axis of the packer. The planar surface has an innermost radial extent which joins the tapered sidewall and an outermost radial extent which joins the cylindrical abutment surface. The extrusion preventing device also includes an inner split ring of complimentary shape but reversely arranged to the outer ring.

Abstract: In a sortation conveyor for cartons and the like wherein selected cartons can be diverted out of the main line to a branch line by means of diverter wheels which are directed obliquely with respect to the main line and which pop up into the path of a carton traveling on the main line to divert it to an associated branch line, the diverter wheel assembly comprises a plurality of diverter wheels arranged in two rows extending transversely across the main conveyor line, with all of these wheels being skewed with respect to the main line so that they define a course directed toward their associated branch line, and also a single further diverter wheel which is located downstream from the two rows of wheels at a position overlapping but spaced from the adjacent side edge of the main conveyor belt or other main conveying means so that if a carton, particularly a large carton, extends beyond the two rows of diverter wheels, the extra diverter wheel will prevent such carton from making frictional contact with the mai

Abstract: A vibration damper for a road planer and the like with a main frame and a sub-frame movably connected thereto. A prime mover and a tool are mounted on the sub-frame, which includes frame members forming compartments adapted to receive lead shot particles therein. The particles absorb vibrational energy from the prime mover and the tool. A method of damping vibration is disclosed wherein vibrational energy is transmitted to the lead shot particles which vibrate and generate heat. The heat is dissipated through the frame members to the atmosphere.

Abstract: A downhole tool positioned intermediate the mud motor and the drill bit, for reducing the hydro-static head near or around the bit. What is provided is an upper body portion threadably attachable to the mud motor and having an internal shaft with a bore therethrough for allowing mud to flow down the shaft rotatable during the the operation of the tool. The upper body portion further includes a gear member on the outer wall of the shaft for rotatably engaging the pair of upper gear members which imparts rotation to a pair of lower gear members for further imparting rotation to a fan member located in the lower portion of the tool.

Abstract: The apparatus for making a substantially vertical slot in the ground, especially in a single operation in making a sealing or supporting wall, comprises a machine frame with a rectangular cross section guided in the slot in the ground with a plurality of guide surfaces and at least one driven cutting wheel positioned at the lower end of the machine frame. The machine frame and the cutting wheels have a width which correspond to the width of the slot in the ground within tolerances defined by the guide free play and the cutting free play. The machine frame is guided in the vertical slot with a plurality of guiding surfaces and comprises an upper guide frame and a lower guide frame. The cutting wheels are mounted on the lower guide frame. The controlling piston cylinder unit for control of the lower guiding frame is mounted between the upper and lower guiding frames.

Abstract: A pot hole filling formulation comprises a polyolefin preferably ethylene acrylic acid in combination with an aggregate preferably gravel particles of one-quarter inch dimension or larger. The polyolefin, preferably in pellet form is mixed with the aggregate and applied to the pot hole. A heat source melts the polyolefin and causes it to flow within the pot hole to fill up the crevices in the pot hole. A second layer of aggregate is applied to the top surface of the fill before the polyolefin hardens to improve the skid resistant qualities of the fill as well as to minimize any deleterious effects of ultraviolet light from the sun.

Abstract: In accordance with an illustrative embodiment of the present invention, a kickover tool for replacing and removing valves includes an orienting section having angularly spaced dogs that are cooperable with a sleeve in a side pocket mandrel to cause orientation of the tool and to trigger longitudinal movement of a control rod. Rod movement cams an inwardly biased kickover arm outwardly to enable extension of guides that cooperate with ramps or the like in the side pocket mandrel to cause a valve coupled to said kickover arm to be inserted through a seat and latched in place in the mandrel. After the valve is seated and latched, the guides are disabled wtih response to upward force on the pivot arm. A clutch to prevent premature actuation of the kickover tool also is disclosed.

Abstract: An improved annular seal between tubular members in a subsea wellhead having an annular seal member with a U shape in section with the opening facing upwardly and two interengaged annular wedges for energizing the sealing surfaces of the inner and outer portions of the seal member at different levels. The interengagement of the wedges includes sufficient play to provide proper energizing of both inner and outer sealing surfaces at the same time. Further, the inner sealing surface is positioned at a much higher level than the outer sealing surface and close to the upper end of the inner member in which it is to seal to minimize the setting force for the inner sleeve and to minimize the amount of drag the seal will incur when retrieved. Also, the location of the outer sealing surface close to the inner member shoulder minimizes the reaction path of the lockdown sleeve.

Abstract: A bridging set for use by infantry personnel for the passage of water obsles. The set comprises at least one bridge unit, a float adapted for connection to a bridge unit from below and a roller unit adapted to support loosely a bridge unit. The bridge units are adapted for fast-locking coupling in alignment so as to form an extended bridge assembly. With the aid of the float and roller, a bridging unit or an assembly of such units is advanced from one bank of a water obstacle to the other.

Abstract: A tool-positioning device is composed of a branch assembly in which each branch tube communicates with each branch flow string, an intermediate assembly provided with convergent tubes and a connecting assembly provided with a spline for guiding the connecting assembly with respect to one of the flow strings. An orientation and guiding member is interposed between the intermediate assembly and pumping means housed within a production tube. The orientation and guiding member has a slit which is oriented with respect to the spline in order to have a fixed and invariable position.

Abstract: A power transmission V belt for being trained around driver and driven pulleys for transmitting power therebetween includes a loop-shaped metallic belt and a plurality of metallic V blocks mounted on the metallic belt successively in the longitudinal direction thereof. A a self-lubricating, heat-resistant, wear-resistant hard layer is coated on at least one of a radially inward surface and opposite side surfaces of the metallic belt, and radially outward surface and opposite side surfaces of the V blocks. The loop-shaped metallic belt comprises a stack of metallic members, and the self-lubricating, heat-resistant, wear-resistant hard layer is coated on at least one of confronting surfaces of superimposed ones of the metallic members.

Abstract: A hydraulic accumulator-compressor vessel using geothermal brine under pressure as a piston to compress waste (CO.sub.2 rich) gas is used in a system having a plurality of gas separators in tandem to recover pipeline quality gas from geothermal brine. A first high pressure separator feeds gas to a membrance separator which separates low pressure waste gas from high pressure quality gas. A second separator produces low pressure waste gas. Waste gas from both separators is combined and fed into the vessel through a port at the top as the vessel is drained for another compression cycle. High pressure brine is then admitted into the vessel through a port at the bottom of the vessel. Check valves control the flow of low pressure waste gas into the vessel and high pressure waste gas out of the vessel.

Abstract: According to the applicant's invention a load detector is used, in which a load sensor and a vibration sensor are combined using an AND gate. A load signal from the load detector is used for the feedback control of the cutter drum height and double ranging drum cutter running speed, so that a person who is not skilled can operate the double ranging drum cutter while preventing overload acting on the cutter drum.

Abstract: A trapezoidal cross section cog belt comprising a rubber body having longitudinally spaced inner cogs, a longitudinally extending tension resisting girdle and transversally extending reinforcement members in said cogs, said members having a bandular open shape adapted to undergo deformation in the longitudinal direction of the belt when the same is in use.

Abstract: Equipment for depositing processing products in wells after being lowered inside production tubes for depositing cement to seal perforations in the production tube and also for depositing detergents or acid.A syringe comprises a clock mechanism which, after a given period of time and through the medium of a striker for piercing a cap which seals a pressurized oil reservoir, actuates a hydraulic bolt comprising a barrel, a piston, a fixed liner encased in a movable liner and means for maintaining the movable liner in a raised position.A central rod rigid with the movable liner traverses a syringe body, of which the filling space is provided with discharge orifices co-operating with a valve carried by the end of the central rod.

Abstract: A tri-cone drill bit (10, 10A) comprising a plurality of conical roller cutters (16, 16A) having hard metal cutting elements thereon and being so positioned relative to each other that their rotational axes are offset from the rotational axis of the drill bit (10, 10A), and a drilling fluid nozzle system for directing a pressurized fluid stream (76, 76A) across certain of the cutting elements and thereafter against the formation generally at the bottom of the well bore so that when the drill bit (10, 10A) is used in its most advantageous areas, such as the soft, medium-soft and plastic formations, the nozzle system prevents "balling up" of the cutters and greatly increases the drilling efficiency of the bit. In one embodiment (FIGS. 15-20) the drill bit body (12A) has vertically extending recessed portions (21A) formed at the junctures (19A) of the lugs (15A) to provide flow passageways for the upward flow of drilling fluid and entrained cuttings.