Abstract: An apparatus and method for lining sewer pipes that utilize an adjustable form configured to conform to the shape and dimensions of the interior of a man-entry sized pipe line. The adjustable form can be used to position a sheet of liner material immediately adjacent the inner sewer walls. An air cushion system is utilized to reduce friction and drag between the sheet of liner material and form so that the liner sheet can be easily adjusted prior to bonding to the inner walls of the pipe line.

Abstract: The combination of a flexible pipe, e.g. plastic, and a reinforcing member mounted around the pipe to strengthen the pipe and to enhance its ability to resist deformation under load. In one embodiment the reinforcing member includes a flexible perforated plastic netting containing an aggregation of lightweight elements such as expanded polystyrene beads capable of wrapping around the pipe, preferably in helical fashion along the length of the pipe. In another embodiment, a number of members are mounted on the pipe in longitudinally extending fashion. In all embodiments, the beads provide drainage around the pipe when it is placed in a trench and obviate the need for gravel normally used in conventional systems.

Abstract: A fabric for use with a system for monitoring prescribed body functions comprising an elastic fabric, adapted to be carried by a torso, which is stretchable in its longitudinal direction so as to expand and contract in response to body movement and size. The carrier includes at least one conductive and inelastic yarn arranged longitudinally of and located between upper and lower surfaces. The conductive yarn is arranged in sinusoidal configurations longitudinally of the fabric. The conductive yarn forms a breakout through one of the outer surfaces, at selected locations along the length of the fabric, forming opposed exposed ends above the surface. A monitoring unit, which includes a connector and a sensor, is secured with the one surface at the breakout with the connector being united with the exposed ends of the conductive yarn. The fabric acts to maintain the monitoring unit in a desired stationary position allowing the sensor to sense signals emitted from the torso and transmit these senses signals.

Abstract: A thread clamp for a weaving machine includes a clamp having at least two clamping parts between which a thread may be clamped and an actuator arranged to move the clamping parts between clamping and unclamped positions. The actuator is arranged to operate the clamp so that it moves at least in one direction by a negative fluid pressure. The actuator may be formed as a small piston that may be actuated both by positive pressure and negative pressure to move the clamp between clamping and unclamped positions.

Abstract: A method for detecting the undesirable entry of oxygen into a transfer system that transfers liquid hydrogen from a liquid hydrogen source into a container. A nozzle for use in the transfer system for dispensing liquid hydrogen comprises a housing and an oxygen sensor positioned inside the nozzle for detecting the concentration of oxygen in the nozzle when the liquid hydrogen is not flowing. The sensor emits a signal indicative of the concentration of oxygen in the transfer system before the liquid hydrogen begins transferring. The signal is received by a controller and prevents transfer of liquid hydrogen until the oxygen is removed from the transfer system.

Abstract: The opening of an oil container 11 for storing oil 12 is sealed airtight with a cover member 32. A one-sided-bag-shaped fluid dynamic pressure bearing 10 is seated on an O-ring 25 and fixed airtight onto the upper surface of a bearing seating 30. Inanexhaust position with the distal end portion of an injection tube 36 positioned away from an oil level, the inside of the oil container 11 is evacuated by a vacuum pump 22 through a suction/exhaust passage including a suction/exhaust through-hole 17, thus turning the inside of the one-sided-bag-shaped fluid dynamic pressure bearing (10) into a vacuum. In this state, a control device drives a moving device to raise the oil container 11 to an injection position and releases the suction/exhaust passage to the atmosphere. This causes the oil 12 to be injected into the one-sided-bag-shaped fluid dynamic pressure bearing 10 through an oil injection passage including the injection tube 36.

Abstract: An apparatus (10) for handling bulk particulate material (M) includes a reservoir hopper (16) having a gas-permeable liner (42) and a gas inlet (44) connecting the reservoir hopper (16) to a pressurized flow of gas sufficient to fluidize the material (M). A transition and pipe assembly (18) receives a flow of material (M) from the reservoir hopper (16). The transition and pipe assembly (18) has an outer conduit (54), an inner conduit (52), and at least one gas inlet (64). The outer conduit (54) is substantially impervious to gas whereas the inner conduit (52) is permeable to gas. The inner conduit (52) is disposed within and surrounded by the outer conduit (54). The gas inlet (64) connects the outer conduit (54) to a pressurized flow of gas to fluidize the material (M) within the inner conduit (52). A variable orifice non-contact valve (24) controls the flow of material (M) from the transition and pipe assembly (18).

Abstract: A driver interactive system to indirectly monitor hydrogen fuel cell vehicle electrical charge potential through vehicle to ground resistance measurements, and to permit refueling only when vehicle to ground resistance does not exceed a predetermined safe level thereby reducing the possibility of a static discharge during the refill of high pressure storage tanks in hydrogen powered vehicles.

Abstract: During non-use of tank (53), a connector for dispensing liquid from the tank has no portion projecting from the tank, keeps the tank in its sealed condition, and makes no disturbance. Provided in drum cap (51) threadably engaged with a neck of the tank are liquid outlet plug installation hole (55) and dual-purpose gas/liquid inlet plug installation hole (56). Siphon tube (59) extending downward to the bottom of the tank is provided inside hole. (55) of liquid plug (57) an upper surface of which does not extend beyond an upper surface of the drumcap. Dual-purpose gas/liquidplug (70) is provided inside the hole (56) not having its upper surface extend beyond the upper surface of the drum cap. Caps (62 and 75) are detachably fitted in the liquid plug and the gas/liquid plug, respectively, to seal upper openings of these plugs (57 and 70), respectively.

Abstract: Sealing and safety device made from flexible elastomer material, for filing a hollow body with a liquid using a delivery nozzle, which includes an annular seal for surrounding the nozzle and preventing the exit of gases from the hollow body and also a valve capable of opening, in the event of excess overpressure in the hollow body, only towards the external atmosphere so as to create a passage allowing the escape of liquid and/or of gas.

Abstract: A run-flat tire-wheel assembly having, in an inside cavity of the tire/rim, a run-flat support formed by a ring-shaped metal shell and rubber elastic members or a ring-shaped metal shell and rubber elastic members composed of a rubber composition containing 100 parts by weight of a peroxide cross-linkable rubber and 1 to 30 parts by weight of a peroxide cross-linking agent, wherein the contact surfaces of the ring-shaped metal shell with the rubber elastic members are subjected to an electrolytic polymerization with 6-mono- or di-allylamino-1,3,5-triazine-2,4-dithiol or its mono- or di-salt, whereby the bondability between the ring-shaped metal shell and rubber elastic members is improved.

Abstract: A pneumatic tire, comprising a bead part (4) having a bead reinforcement layer (10) continuously extending from the inside part (10a) of a bead core (5) positioned on the axial inside of the tire to the outside part (10c) thereof on the axial outside of the tire through a bottom part (10b) passing the radial inside of the tire, the bead reinforcement layer (10) further comprising reinforcement cords (11) arranged at an angle of 20 to 60° relative to the circumferential direction of the tire, the outside part (10c) further comprising a main part (C1) extending to an area (Y) adjacent to a bead apex rubber (8) and a folded part (C2) folded up at the radial outer end (Ce) thereof, wherein the folded part (C2) terminates on the radial inside of the radial outer surface (5s) of the bead core (5).

Abstract: A method for producing a spunbonded nonwoven fabric by extruding a linear sheet of filaments arranged parallelly side by side in the form of a curtain from a plurality of spinning capillaries, involving aerodynamical pulling off and drawing of the filament sheet, the filament sheet (8) which emerges from the drawing duct (12) or which is pulled off a spool being moved laterally crosswise by an air flow having periodically changing directions, the air flow being oriented alternately at an angle toward the filament sheet (8) as viewed in the horizontal plane.

Abstract: A resin film is provided wherein distortions generated at ear portions of films at shorter sides of a resin film coated heat insulating/sound absorbing material can be eliminated. The front and rear surfaces and both side surfaces in the direction of longer sides of the inorganic fiber mats are covered with band shaped resin films in a state that a predetermined spacing is provided between the mats, and the resin films are cut at a portion between the mats by a cutting blade along a direction of shorter sides in a state that the films are pressed by a pressing member, the resin films are pressed by the pressing member having film setting portions at both ends of a bottom surface thereof, whereby the slopes of the film setting portions prevent the ear portions of the resin films at the cutting portion from spreading sideways.

Abstract: A tape dispenser comprises a cylindrical hub for rotatably supporting a roll of tape, and a dispensing arm extends radially outwardly of the hub and has a tape guide on the bottom thereof by which tape is arched concavely toward an underlying surface as the tape is displaced from the dispenser and applied to the underlying surface. A brake arrangement on the dispenser is operable manually by a user to stop or otherwise control rotation of a tape roll during a dispensing operation.

Abstract: A retractable cover for architectural openings having collapsible vanes includes a support structure in the form of a sheet of material, monofilaments, tapes, ribbons, cords, or the like, supporting an upper edge of a plurality of vertically spaced, horizontally extending vanes with the lower edges of the vanes in most embodiments of the invention being connected to operating elements adapted to raise the lower edges of each vane toward the upper edges to define openings or gaps between the vanes through which vision and light can pass in an open condition of the covering. Variations of the covering do not require movement of a lower edge of a vane relative to an upper edge but simply movement of some vanes relative to other vanes. The vanes can be made of materials having different flexibilities and where more rigid materials are used, creased fold lines can be established for desired operability.

Abstract: System for operating a blind in a glass-enclosed chamber the ends of said blind being respectively fitted to a fixed upper box (40) and to a movable box (60), subjected both to a guide device for translation, parallel to itself, when opening and closing said blind by a pair of cords (85, 86) interacting between the fixed (40) and movable (60) boxes and a lower fixed box (50), and also to a pulling device comprising a small box containing permanent magnets fixed to the movable box (60) and a free knob, containing permanent magnets of opposing pole, so that by matching, through a pane of glass, the magnets in said knob with those fixed to the movable box (60), the blind can be opened or closed as desired.

Abstract: A monitor system for monitoring a molding machine that includes a vertically-movable supporting frame, a pattern carrier on which a pattern is placed, a flask placed on a leveling frame, a sand hopper provided with an optional an air-jet chamber, sand-charging nozzles disposed around a plurality of squeeze feet that is disposed at a lower end of the sand hopper, and a filling frame connected to filling-frame cylinders and surrounding the squeeze feet and the sand-charging nozzles from their outside, the filling frame to be placed on the flask when lowered, comprising at least one sensor connected to the molding machine, for detecting an attribute of the molding sand as required and data analyzing monitor means connected to the sensor, for receiving data that correspond to the attribute detected by the sensor and analyzing the attribute and displaying the results of the analysis.

Abstract: Thin cast strip is produced in a twin roll caster by delivering molten steel between the rolls to form a casting pool. The casting pool is confined between the rolls by a pair of side dams adjacent the ends of the casting rolls. Steel strip is delivered downwardly to the nip through a metal delivery system having a tundish and core nozzles. One or more of the refractory components, including without limitation the tundish, core nozzles and side dams, or portions thereof, are replaced by first preheating the refractory component(s) to be replaced at a removed location, and then rapidly transferring the preheated component(s) from the preheating position and installing the same in the operating position by a transfer device. The desired refractory component is rapidly removed and the preheated replacement refractory component rapidly transferred and installed in the operating position in an amount of time that avoids thermal shock to the refractories that are not replaced.

Abstract: A heat transfer system is presented for managing thermal transients, thus providing engineers greater flexibility in designing thermal solutions for applications subject to transient heat-generation. A heat reservoir device for managing a heat input subject to transient conditions includes a heat transfer subsystem having a first end and a second end, where the first end is thermally coupled to the heat input; a heat storage subsystem coupled to the second end of the heat transfer subsystem, where the heat storage subsystem comprises a phase change material responsive to the transient conditions. The excess heat load during transient operation is temporarily absorbed by the latent heat of fusion when the phase change material changes its phase from solid to liquid. Subsequently, the absorbed heat can be released back to the ambient via a heat rejection subsystem. This allows engineers to design smaller heat sinks capable of accommodating given transient conditions.

Abstract: The invention relates to a plate heat exchanger and a method for manufacturing a plate heat exchanger. The plate heat exchanger includes a number of heat exchanger plates (1), which are substantially parallel to an extension plane and arranged adjacent to each other in a plate package (2). A first end plate (8) and a second end plate (9) are arranged on a respective side of the plate package. A first tie sheet (10) and a second tie sheet are arranged on a respective side of the plate package substantially perpendicular to the extension plane. At least one connection member (17) extends between the tie sheets outside one of the end plates (9) and at least one beam (16) extends outside the second end plate (8) in parallel to an extension plane in engagement with the attachment of each tie sheet (10).

Abstract: An aluminum extruded fin set includes a substrate and a plurality of dissipation fins mounted upright on it. There are gaps between heat dissipation fins. Each dissipation fin is divided into three child dissipation fins by two slanted cutouts. The child dissipation fin between two slanted cutouts is bent toward the gap between heat dissipation fins. When airflow passes by the gaps, the airflow velocity distribution is modified due to the bent child dissipation fins and the noise spectrum distribution is modified as well. Such a Hay-stack noise spectrum distribution is more comfortable for the listener than a conventional one.

Abstract: A laser located within a casing of an optoelectronic module is operated by heating the laser to an operating temperature at or above the maximum specified, operating temperature of the module casing using a heater device within the module, the laser having operating characteristics at its operating temperature that are sufficient for its required function. The heater device can be separated from the module casing by an insulating layer or by a thermal switch. The thermal switch can include a droplet of thermally conductive fluid displaceable between a first position where it provides a low thermal impedance path between the heater device and the module casing and a second position wherein a high thermal impedance path is provided between the heater device and the module casing.

Abstract: A core for a charge air cooler comprises inner and outer concentric tubes providing an axially extending annular passageway for flow of a fluid, preferably a liquid coolant. A first inlet and a first outlet are provided at the ends of the axial annular passageway. Arranged on an outer surface of the outer tube is at least one circumferential fluid flow passageway for flow of a fluid, preferably air. Each circumferential flow passageway is provided with a corrugated strip fin comprising a plurality of rows of corrugations. The core is combined with an outer housing to form a heat exchanger. The housing is provided with an inlet and an outlet for the fluid flowing through the circumferential flow passageways. Other embodiments are disclosed in which the heat exchanger is adapted for use with three fluids and in which additional cooling capacity is provided by the provision of coolant passageways in the housing.

Abstract: A vehicle air conditioning unit includes an air duct, through which air is blown into a passenger compartment, and a partition board, which partitions the air duct in its inside into a first air passage and a second air passage. Temperature of air in the first air passage and temperature of air in the second air passage can be separately controlled. The air duct has a recess on its one side. An air conditioning device is disposed in the recess. The partition board is deformed correspondingly to the recess so that a corresponding cross-sectional area of the first air passage and a corresponding cross-sectional area of the second air passage should be approximately equal.

Abstract: A fan motor speed control system for controlling the fan motor speed of an air conditioning system includes a power output circuit including a power triac which is turned on and off by an opto-isolator connected to a pulse generator circuit for varying an AC voltage waveform imposed on the fan motor. The pulse generator circuit is connected to heating and cooling ramp circuits and a minimum speed circuit to provide a variable voltage signal imposed on the pulse generator circuit corresponding to the temperature difference sensed by a return air sensor and a heating or cooling sensor or by separate heating and cooling sensors disposed adjacent respective heating and cooling heat exchangers of the air conditioning system. An adjustable minimum speed circuit and a cutoff circuit are provided to control motor minimum speed or motor shutoff when a predetermined minimum speed is reached to prevent motor bearing failure or overheating.

Abstract: A refrigerator adapted for use in low ambient temperature conditions such as in an unheated garage or outdoors on a deck or patio. The refrigerator is provided with a low ambient heater to add heat to the refrigerated space when ambient temperatures outside the refrigerator are low enough that items stored in the refrigerator could freeze. The low ambient heater is controlled by an ambient thermostat located to sense temperatures outside the refrigerator. The low ambient heater and ambient thermostat are connected in the refrigerator control so that the ambient heater can not be energized when the cooling system is operating.

Abstract: A hydraulically set concentric packer with multiple umbilical bypass through the piston. In a described embodiment, a packer for use in a subterranean well includes a piston which displaces to set the packer in the well, and a line extending through the piston. The piston has concentric inner and outer diameters, and is concentric with an inner mandrel and an outer housing of the packer.

Abstract: A gripper assembly for anchoring a tool within a downhole passage and for possibly assisting movement of the tool within the passage. The gripper assembly includes an elongated mandrel and flexible toes that can be radially displaced to grip onto the surface of the passage. The toes are displaced by the interaction of a driver slidable on the mandrel and a driver interaction element on the toes. In one embodiment, the toes are displaced by the interaction of rollers and ramps that are longitudinally movable with respect to one another. In another embodiment, the toes are displaced by the interaction of toggles that rotate with respect to the toes.

Abstract: The present invention is an apparatus for relieving annular fluid pressure between nested casing strings. The invention includes a pressure relief collar formed of a cylindrical housing and a set of end connections disposed on opposite sides of the cylindrical housing. The end connections join adjacent sections of casing string of the same diameter. A plurality of equally spaced centralizer blades are secured to the outer surface of the cylindrical housing. Each centralizer blade is equipped with a pressure relief mechanism, which opens the passage of fluid from an outer annulus between adjacent casing strings to an inner annulus between different adjacent casing strings and also prevents backflow of fluid. One or more inlet and outlet filters may also be employed to remove solids and other contaminants from the fluid entering the pressure relief mechanism. The invention also has application as a pressure relief collar for eccentric casing strings.

Abstract: Embodiments of the invention relate to a wireline assembly that includes a coring tool for taking coring samples of the formation and a formation testing tool for taking fluid samples from the formation, where the formation testing tool is operatively connected to the coring tool. In some embodiments, the wireline assembly includes a low-power coring tool. In other embodiments, the coring tool includes a flowline for formation testing.

Abstract: A gravel pack completion with fiber optic monitoring. In a described embodiment, a method for completing a subterranean well includes the steps of: positioning at least one assembly in a wellbore of the well; then inserting a portion of a tubular string into the assembly; and attaching a fiber optic line to the tubular string portion.

Abstract: A sand control screen assembly (60) that is positionable within a wellbore includes a base pipe (62) having at least one opening (64) that allows fluid flow therethrough and a filter medium (66) positioned exteriorly of the base pipe (62) that selectively allows fluid flow therethrough and prevents particulate flow of a predetermined size therethrough. An isolation member (68) is positioned interiorly of the base pipe (62) forming an annulus (84) therewith. A one-way valve (86) is slidably operable within the annulus (84). The one-way valve (86) controls the flow of fluid through sand control screen assembly (60) such that fluid flow is selectively prevented from the interior to the exterior of the sand control screen assembly (60) but is allowed from the exterior to the interior of the sand control screen assembly (60).

Abstract: A method of cementing in a subterranean formation that comprises providing a foamed cement composition that comprises water, a cement, a gas, and an additive, the additive comprising an anionic foaming agent and at least one of an anionic foam stabilizer or a Zwitterionic foam booster; placing the cement composition into the subterranean formation; and allowing the cement composition to set therein is provided. Foamed cement compositions, additives for foaming and stabilizing a cement composition, and methods of reducing the density of a cement composition, also are provided.

Abstract: A downhole tool for use in the removal of burrs or other unwanted material from an inner surface of a pipeline, well casing or other tubular. The tool has a plurality of milling elements, which may be biased against the surface or retracted from the surface to disengage the tool from the tubular. A drop ball mechanism with a fluid by-pass is described for disengaging the milling elements.

Abstract: Disclosed are compliant variable tension risers (106) to connect deep-water subsea wellheads (102) to a single floating platform (104). The variable tension risers (106) allow several subsea well-heads (102), in water depths from 4,000 to 10,000 feet, at lateral offsets from one-tenth to one-half of the depth, to tie back to a single floating dry tree semi-submersible platform (104). Also disclosed are methods to counter buoyancy and install variable tension risers using a weighted chain ballast line (228, 230).

Abstract: A motion compensator is used on a floating vessel servicing a subsea well. The motion compensator includes a first frame assembly adapted to be connected to a cable extending from a lifting structure. When connected to the cable, the first frame assembly extends longitudinally along an axis substantially parallel with that of the cable. The motion compensator also includes a second frame assembly connected to the first frame assembly. The second frame assembly overlaps a longitudinal portion of the first frame assembly. The first and second frame assemblies are moveable relative to each other and define an expanded position and a contracted position. The motion compensator further includes a piston assembly positioned between the first and second frame assemblies. The piston assembly has a piston chamber and a piston that slidingly engages the piston chamber when the first and second rod assemblies move relative to each other.

Abstract: Liquid is lifted from a well by a fluid displacement device which moves within a production tubing and maintains a seal against the production tubing during movement. The fluid displacement device is moved up and down within the production tubing between the well bottom and the earth surface by applying gas to create opposite relative pressure differentials across the fluid displacement device. Preferably the pressure differentials are obtained from gas supplied from the well at natural formation pressure.

Abstract: A drilling rig is provided which is adapted to selectively drill using coiled tubing and jointed-pipe. The rig includes a base, a mast, a top drive slidably mounted to said mast for performing jointed-pipe operations, and a tubing injector for performing coiled tubing operations, mounted on said mast for selective movement from a first position in which the injector is in line with the mast and a second position in which the injector is out of line with the mast to permit jointed-pipe operations by the top drive. The rig is uniquely suited to easily and quickly assemble bottom hole assemblies (BHA's), and to connect such BHA's to coiled tubing.

Abstract: A method and apparatus for holding and turning a tubular and string of tubulars, such as casing, for make-up and drilling with the tubulars are disclosed. The apparatus generally includes a spear and a clamping head, both of which are mounted to a top drive. The spear and the clamping head can be engaged to transmit torque therebetween from the top drive. In addition, an aspect of the invention provides variable height wickers positioned on slips to enable use of the slips with variable inner diameter (ID) and weight casing without deformation or rupture of the casing. Still further, a casing collar is also provided to provide reinforcement to the casing in the area of slip contact with the casing ID.

Abstract: A tool for radially expanding casing having a tool body that includes a proximal end, a distal end, and an outer surface. The tool includes at least one hydraulic channel disposed axially. The at least one hydraulic channel transmits hydraulic pressure from behind the expansion tool forward in the direction of travel of the expansion tool.

Abstract: A technique utilizes blocking members to resist contraction of expandables in wellbore environments. The technique comprises an expandable having a wall with a plurality of expandable cells. A plurality of blocking members cooperate with at least some of the cells to resist contraction of the expandable device once transitioned to a desired expanded state.

Abstract: A valve apparatus. The valve apparatus is disposed within a well so that an annulus is formed between an outer portion of the valve and an inner portion of the well. In one preferred embodiment, the valve apparatus comprises an outer mandrel containing an annulus port; an inner mandrel slidably disposed within the outer mandrel, and wherein the inner mandrel contains a production and equalizing port. The valve contains a seal assembly so that pressure from the annulus is isolated from the inner portion of the inner mandrel. In one preferred embodiment, the seal assembly comprises: a first header seal; a first seal ring, abutting the header seal, for sealing with the outer portion of the inner mandrel; a follower seal abutting the seal ring; a second seal ring, abutting the follower seal, for sealing with the outer portion of the inner mandrel; a second header seal; and an equalizing seal abutting the second seal ring.

Abstract: A method and apparatus for controlling inflation and deflation of spaced inflatable packer elements of a straddle stimulation tool within a well casing of a well. A straddle stimulation tool is positioned by tubing at a desired location within the well casing. Fluid is pumped through the tubing and tool at a rate inflating the spaced inflatable packer elements within the well casing and establishing an annulus interval. The inflation control retains pressure within the inflated packer elements and permits the flow of stimulation fluid into the annulus interval for stimulation of the formation. After completion of well stimulation, the packer element pressure control is moved to a packer equalizing position by tension applied via the tubing to equalize packer pressure with casing annulus pressure, deflating the packer elements and permitting conveyance of the straddle stimulation tool within the well casing by the tubing string.

Abstract: A self-closing vent has its frame and honeycomb screen coated with an intumescent material. When affixed to an external wall or eave of a building, the vent is normally open, allowing free flow of air into and out of the building, but when exposed to the heat of a fire, such as a wildfire, the intumescent expands to close the vent, thereby preventing an external fire from entering the building.

Abstract: An object of the invention is to provide a blade preferable for being mounted on various kinds of work machines, particularly work machines for digging, carrying of soil and leveling, in which increase in a quantity of soil per tractional force is achieved with a simple structure to reduce consumption horsepower and increase fuel consumption efficiency thereby leading to low cost. A blade comprises a central front face section having a linear first cutting edge at a bottom end thereof, a jointed front face section having a second cutting edge which continues from the first cutting edge and extends backward in an expanding manner at a predetermined angle, and an end front face section having a third cutting edge which continues from the second cutting edge and extended forward in an expanding manner at a predetermined angle.

Abstract: A drive for a motor-driven hand-held tool includes a motor (17) and a gear mechanism (20) for converting a rotational movement of the motor (17) into a reciprocating movement of the reciprocating drive element (30) for a working tool, with the gear mechanism (20) having a transmission element (23) axially secured on a support (21) with a support member (26) and including a mass-balance member (31), a first eccentric take-off element (24) cooperating with the reciprocating drive element (30) and a second eccentric take-off element (25) cooperating with the mass-balance member (31) for imparting reciprocating movement thereto, and with the support member (26) forming a slide support surface for the mass-balance member (31).

Abstract: A hammer drill with rolling contact at the contact surfaces for transmission of axial force between a drive shaft and wave race. By using roller bearings, line contact is obtained. The area of contact is thus close to zero as opposed to a relatively large area in engagement systems using toothed surfaces. Use of point or line contact reduces heat generation and reduces energy loss due to friction.

Abstract: A pneumatic tool includes a shell with a chamber defined therein, a first passage communicated with the chamber and a second passage communicated with the chamber. A rotor is installed in the chamber for rotation when driven by pressurized air flowing into the chamber through the first passage. A shaft extends to the exterior of the shell from the rotor. A trigger is installed on the shell. A control device is put in the first passage and connected with the trigger for controlling the first passage. A muffler is put in the second passage. The muffler includes a plurality of balls.

Abstract: A method of drilling a well includes calculating and estimating the dip angle, wherein said estimated dip angle being based on offset well data, seismic data, core data, pressure data. Next, the method includes drilling a well with a logging while drilling tool using the estimated formation dip angle so that real time logging data is generated along with the drilling data and calculating an instantaneous formation dip angle. Next, the real time logging data is obtained and a target formation window is projected ahead of the well path that includes a top of formation and a bottom formation. The method includes monitoring the real time logging and drilling data and drilling the well through the target formation window. The method further includes changing the estimated instantaneous formation dip based on the obtained data and adjusting the target formation top window and the bottom formation window.