Abstract: A first longitudinal grip force FGG is calculated by differentiating a vehicle body speed by time. A driven wheel torque is calculated from an engine torque and a second longitudinal grip force FGT is calculated from the driven wheel torque. The first longitudinal grip force FGG and the second longitudinal grip force FGT are compared with each other, and the higher one of such grip force is selected as a longitudinal grip force TG. When the vehicle travels on a normal flat road, the first longitudinal grip force FGG obtained from the vehicle body speed is selected. But when the vehicle travels on an ascent road, on which the first longitudinal grip does not indicate an accurate value, the second longitudinal grip force FGT obtained from the engine torque is selected. With this arrangement, the longitudinal grip force is accurately estimated even if the vehicle travels on such an ascent road.

Abstract: This invention relates to a mobile pipe testing system. The system carries its own supply of a test fluid and an independent power source. During operation, a pipe is lifted by an inbound conveyor and is delivered to a pre-test station, from which it is lifted by the arm and deposited into a testing cradle. The ends of the pipe are sealed by test plugs which are moved into engagement with the pipe ends, and a pressure is applied to the interior of the pipe to test the pipe for possible leakage. Once the test is complete, the test plugs are moved away from engagement with the pipe, and the lifting arm moves the pipe segment into a holding station, wherein the pipe is allowed to drain, while the fluid is filtered, collected and recycled back into a fluid container. The lifting arm then transports the pipe to the outbound conveyor which off loads the pipe.

Abstract: An apparatus and method for pressure testing a body having a chamber by utilizing differential pressures to create a seal, whereby the body can be pressure tested without undesired forces being exerted upon the body.

Abstract: The invention is an improvement of the method and apparatus used to test gas service lines at residential or business locations such that the application of air pressure into the system, the reading and monitoring of the gauge and the ultimate release of the air pressure from the system is conducted with the use of one device which is applied at one location.

Abstract: The invention is directed to a circumferential actuator for actively contling and generating pressure waves in a piping system having a fluid or a fluid flow therein. The circumferential actuator includes a casing, a plurality of actuator units mounted in the casing for generating controlled pressure waves, a plurality of amplifiers for electronically conditioning the force generated by each of the plurality of actuator units, a controller for providing the input signals to the plurality of actuator units for controlling the phase and amplitude of the generated pressure wave, and a pressure compensating system for providing a balancing force to each actuator unit. The casing is adapted for interconnection in fluid communication with the piping system for passing the piping system flow therethrough. The plurality of actuator units are arranged axi-symmetrically around the casing.

Abstract: A disc-shaped sealing device for use in temporarily blocking and sealing a plastic fitting in a drain, vent, waste plumbing system is molded as an integral, unitary piece from polymeric material. The sealing device comprises a circular disc and an angled flange extending outwardly and upwardly from the perimeter of the circular disc. The disc-shaped device fits snugly within a barrel of a plastic fitting such that the circular disc is coaxially received in the barrel of the plastic fitting and the angled flange mates with and lies against a bevel in the barrel of the plastic fitting. A lug extends downwardly from the circular disc. First and second elongate grooves are formed in one of the surfaces of the circular disc. These grooves have a common juncture positioned near the forward end of the lug, the grooves diverge and extending along the opposite sides of the lug to near the back end of the lug.

Abstract: This invention relates to a mobile pipe testing system. The system carries its own supply of a test fluid and an independent power source. During operation, a pipe is lifted by an inbound conveyor and is delivered to a pre-test station, from which it is lifted by the arm and deposited into a testing cradle. The ends of the pipe are sealed by test plugs which are moved into engagement with the pipe ends, and a pressure is applied to the interior of the pipe to test the pipe for possible leakage. Once the test is complete, the test plugs are moved away from engagement with the pipe, and the lifting arm moves the pipe segment into a holding station, wherein the pipe is allowed to drain, while the fluid is filtered, collected and recycled back into a fluid container. The lifting arm then transports the pipe to the outbound conveyor which off loads the pipe.

Abstract: Equipment and techniques test the integrity of one or more seals within an oilfield tubular threaded connection 12. A test fixture 74 may be utilized including three axially spaced sensors 92, 86 and 88 which are each responsive to radial deformation of an outer surface of an internally pressurized threaded connection. Excessive radial deformation indicates a failure of at least one of the threaded connection seals. A relatively simple yet highly reliable technique is provided for quickly and easily determining the sealing integrity of a threaded connection made up at a well site. If any one of the multiple seals fails during the test, the operator may either break out and re-test the connection, or may make up and test a new threaded connection. The present invention may be used for substantially increasing the integrity of oilfield tubular connections and thereby reducing the overall cost of hydrocarbon exploration and recovery operations.

Abstract: Apparatus for detecting fluid flow across an article is provided in which the article is received in a sealed chamber and protrudes into ambient surroundings from the chamber that is sealed. Any fluid flow through the article between the ambient surroundings and the sealed chamber can be detected after a pressure differential across the article is generated.

Abstract: System and method for in situ testing of the leak-tightness of a tubular member, which tubular member may be a nuclear steam generator heat transfer tube. The system includes a mandrel insertable into the tube, the mandrel having a pair of spaced-apart expandable bladders surrounding the mandrel. A first channel extends through the mandrel and is in communication with the bladders. A fluid supply circuit is in fluid communication with the first channel for supplying pressurized liquid to the bladders so that the bladders radially expand into sealing engagement with the inner diameter of the tube. As the bladders expand into sealing engagement with the tube, a sealed annular chamber is defined therebetween bounded by the bladders and the inner diameter of the tube.

Abstract: In accordance with illustrative embodiments of the present invention, the existing valves in a crude oil, gas, or other product pipeline are positively sealed off to allow a pressure test to be made of a section or segment of the pipeline between the valves. The section is packed with a hydrocarbon or aqueous liquid. A mixture of a highly viscous hydrocarbon based gel material and a lost-circulation material are injected into the pipeline segment adjacent each valve to form plugs in the line. The gel plugs are squeezed under pressure against the internal components of each valve to cause all leakage paths therein to be bridged over and sealed off. The pipeline segment then is pressure tested to determine if there are any leaks therein, after which the gel is flushed out of the line and broken down into a linear pumpable state for disposal.

Abstract: To draw samples from a source of liquid, a pumping system measures the amount of liquid being pumped by detecting pump cycles and calculating the pumped liquid from this measurement and stored data including conduit size, pressure head and statistical data to correlate detected pump cycles with volume of liquid pumped. Pressure pulses caused by a peristaltic pump are sensed by a piezoelectric film positioned on an inlet conduit connecting the pump to the source of water and, when the liquid reaches a predetermined point determined by the nature of the pulses, the pulses are counted to determine the number of pump cycles.

Abstract: Direction of travel from a wave front in a pipeline is determined with two pressure sensors spaced relatively near to each other so that the site from which the wave front emanated is not located therebetween. For each sensor, a determination is made as to whether a detected signal has exceeded a negative or a positive threshold. In addition, the sensor outputs are subtracted from each other to determine which sensor detected the wave front first. Combining the resulting signals yields information on the nature of the wave front and its direction of travel.

Abstract: An apparatus for hydrostatic pressure testing of tubular products that enables short segments of the tubular product to be individually tested under conditions simulating a capped tube hydrostatic test. The apparatus includes a first seal bladder and gripper member assembly connected to a second seal bladder and gripper member assembly by a connecting member that allows relative axial movement between the two assemblies. A fluid outlet port is provided in the connecting member to introduce pressurized fluid into the short segment of the tubular product between the seal bladders of the two assemblies. Since the first seal bladder and gripper member assembly is axially movable relative to the second seal bladder and gripper member assembly, an axial stress as well as a hoop stress will be induced in the tubular product during testing.

Abstract: A hydraulic hose impulse tester capable of simultaneously testing multiple samples of hydraulic hose in a stationary-impulse condition and in a flexing-impulse condition in the same test environment. The tester eliminates varying extraneous factors which can affect comparative test results by performing the static and dynamic tests simultaneously. Alternatively, all sample hoses can be tested in either a static or dynamic condition.

Abstract: Apparatus and method for experimentally determining the compressive material strength of tubular products includes a housing having a cylindrical cavity therein, top and bottom end caps closing opposite ends of the cavity, tubular bladder means mounted in the cavity and defining a pressure chamber larger than the tubular products to be tested and a fluid receiving space between the bladder means and the wall of the cavity, a plurality of small balls substantially filling the pressure chamber around the tubular product being tested, means for pumping hydraulic fluid into the fluid receiving space to cause the bladder means to apply pressure uniformly to said small balls and thence uniformly over the external curved surface of the tubular product. Means are included to continuously monitor and display the magnitude of the pressure applied to the tubular specimen, and to detect and signal tube failure. Tubular specimens can be instrumented to monitor additional testing characteristics.

Abstract: A pressure testing apparatus including a twin cylinder accumulator assembly having a first cylinder and a first piston dividing the first cylinder into first and second chambers. The first chamber communicates with a test specimen and contains a first fluid. The twin cylinder accumulator assembly also includes a second cylinder coaxial with the first cylinder and a second piston which divides the second cylinder into third and fourth chambers and which is connected to the first piston by a common piston rod. The fourth chamber communicates with a hydraulic pressure unit and is supplied with alternating high and low pressures to cyclically pressurize the first fluid in the fourth chamber and the test specimen communicating therewith. A switch actuator is mounted on the piston rod for actuating first and second proximity sensors to monitor piston rod movement.

Abstract: A hydrostatic test system for subjecting a workpiece or test specimen to a predetermined test pressure until the workpiece fails by developing a leak detectable by the test system. The hydrostatic test system is a modular system readily adaptable to, and able to incorporate therein, a number of different physical devices for regulating, controlling, detecting, and registering functions and activities pertaining to leak detection. Among the devices adaptable in the hydrostatic test system for detecting a leak condition in the workpiece is a differential pressure switch and a static pressure switch, a combination differential and static pressure switch, or an accumulator associated with either a pressure transducer or a high accuracy transducer. The leak condition may be visually signaled by a lamp or indicator light or the sensing of a leak condition may be visually output to a CRT screen.

Abstract: An automotive straight line G-meter utilizes the input from a piezoresistive accelerometer to accurately measure and display both straight line forward and backward as well as lateral or side to side acceleration and deceleration of a vehicle. The automotive straight line G-meter includes solid state circuitry which temperature compensates and amplifies the transducer output before coupling to an analog meter that is calibrated to show the gravity effect of acceleration and deceleration of the vehicle. The G-meter device further includes circuitry for energizing an automotive tachometer that employs a LED (light emitting mode) bar graph to display the revolutions per minute (RPM) of the vehicle engine.

Abstract: A method for testing physical integrity of production tubing and production casing in a gas-lift well includes the steps of opening communication from a pressure source to an interior space of the production tubing; disposing a sealing tool in the production tubing to obtain a seal at a desired location of the production tubing; opening communication from an inner annular space of the well; applying a predetermined test pressure to the interior space of the production tubing; monitoring the test pressure applied for a pressure drop; and monitoring flow from the inner annular space. The physical integrity of the production casing is then tested by opening communication from a pressure source to the inner annular space; closing communication from the interior space of the production tubing; applying a predetermined test pressure to the inner annular space; and monitoring the test pressure for a pressure drop.

Abstract: A testing apparatus is described that enables both single and double-ended tubular members to be tested under pressure and at elevated temperatures. For double-ended tubular members, the apparatus comprises first and second pressure seals at either end of the tubular member under test, both seals including annular compliant members that bear upon the internal surface of the tubular member. A heater is positioned within the tubular member and one of the pressure seals has an orifice through which the heater is connected to a power source. Pressurization occurs through an orifice in the other pressure seal and cooling apparatus surrounds the first and second ends of the tubular member to cool the pressure seals, thereby enabling the annular compliant members to retain their compliancy when the tubular member is heated to test temperature. For single-ended tubular members, a single pressure seal is used having pathways for both electrical and pressurization connections to the interior of the tubular member.

Abstract: An elongated fluid detection device, together with a body of absorbent material, is located between the inner surface of a pipe and an impervious liner spaced from the inner surface thereof, the detection device being operatively connected to an external station. The impervious layer may be of a type normally used for relining defective pipes in situ, and the body of absorbent material, together with the fluid detecting element, preferably substantially filling the cylindrical space between the inner surface of the pipe and the impervious liner.

Abstract: A new two-axis accelerometer comprising a rotating body linked to the motor rotor via a flexure zone. In a first type the rotating mass is concentrated and the flexure zone permits the rotating mass to perform a transversal parallel shift. In a second type the rotating body is an inertia rotor and the flexure zone is an extension of the rotor shaft that embodies a flexible portion. In either type the rotating body/flexure zone combination has two degrees of flexing freedom with two different flexure coefficients in two mutually perpendicular directions both normal to the electric motor shaft. The accelerometer further comprises a deflector shaft coaxial with the rotor shaft and extending beyond the rotating body and associated with electro-optical measuring means and processor means for measuring linear acceleration components in said two mutually perpendicular directions.

Abstract: A pressure testing apparatus for a fire hose utilizing a source of water under relatively low pressure and flowable at relatively high volumetric rate. The apparatus employs a manifold using a hose filling valve. The source of water communicates with the manifold and a low pressure inlet of a pump. The outlet of a pump pressurizes the manifold at a relatively high pressure. Check valves prevent back flow from the manifold to the source of water and the outlet of the pump. A regulator valve is positioned in the manifold to determine the highest pressure found in a portion of the manifold for filling and testing the fire hose.

Abstract: A technique for detecting faults, blockages or holes, in a duct (6). A burst of compressed gas is injected into the duct and the decay of the pressure pulse monitored by a transducer at the gas burst launch end of the duct. A reference decay pressure that would be expected for a perfect duct is generated and the monitored decay is compared with the reference decay for deviation. A perforated duct exhibits greater pressure decay and a blocked duct less pressure decay than a perfect duct. The time occurrence of the deviation indicates the location of the fault. The signal level indicative of the pressure after a predetermined interval may also be used to measure the air friction or blowability within the duct.

Abstract: A test head for enclosing pipe ends to test any diameter pipe within a plurality of pipe diameters in a preselected range which test head has a seal ring assembly which has a resilient body with a counterbore of a larger volume than non-resilient segments in the counterbore and mounted on the body to provide a volumetric space or gap between the segments and resilient body to enable the resilient body to initially move in response to fluid pressure toward sealing relation with the pipe without engaging the non-resilient segments.

Abstract: A tester for testing the strength (wall stiffness) of a tubular sleeve applies axial pressure to the sleeve via a pair of sealing platens closing the open ends of the sleeve and holding the sleeve in the desired configuration. With the sleeve so held air pressure is applied to the inside of the sleeve and the deflection of at least one of the walls is measured and correlated with the applied air pressure applied thereby to obtain an indication of the strength and stiffness characteristics of the container. Generally with a rectangular cross section sleeve deflection of all four sides of the sleeve are measured.

Abstract: A method for controlling, in the manufacture of plate fin and tube heat exchangers, the operation of a tube expander of the type that does not expand all hairpin tubes in a heat exchanger simultaneously so that the two legs of each hairpin tube are expanded at the same time. In a preferred embodiment, a supply of pressurized air is directed through one of a selected group of open ended tube legs. Pressure sensors located at the ends other legs within the group detect the tube, if any, at which there an increase in pressure, establishing continuity between that leg and the first leg and thus identifying the two legs under test as parts of the same hairpin. This matched pair of legs is identified for expansion on the same expansion stroke of the expander. Other legs within the group between which there is pressure continuity are similarly detected and identified.

Abstract: A method and apparatus for hydrostatically testing connections between segments of pipe whereby pressurized hydrostatic test fluid is selectively applied to the connection such that the pressures are principally applied in the vicinity of the radial orifices leading into the sealing elements of the connection and not radially to the inner or outer annular surfaces of the connection in the vicinity of the sealing elements of the connection which would tend to substantially affect the bearing pressure of the sealing elements. In addition, a method and apparatus for selectively applying pressurized hydrostatic test fluid such that the pressures are applied to those areas where the bearing pressure of the sealing elements of the connection is sensitive to the applied pressures, thus manipulating the bearing pressure and controlling the sealing capacity of the connection during hydrostatic leak testing.

Abstract: A high pressure fitting for placing on a tubing includes an annular sleeve having sealing rings therein and a collar enclosing a portion of the sleeve to restrain lateral movements of the sleeve with respect to the tubing. The sleeve has an interior threaded region to receive a plug and an interior annular region. A recess in the annular region retains an O ring and two backup rings which contact the tubing. The sleeve does not contact the tubing. The collar includes two members that have a flange extending into a recess of the exterior of the sleeve to retain the sleeve. The collar also includes an interior tapered annular region spaced away from the end of the tubing for retaining tapered sleeves. The tapered sleeves grip the tubing to prevent movement of the collar and the sleeve with respect to the tubing when high fluid pressure is in the tubing. A tube guide having a shoulder abutting the end of the tubing aids in placing the sleeve on the tubing.

Abstract: Apparatus for pressure testing fluid transmission pipelines comprising spaced apart annular inflatable seal members supported by support members which are interconnected by an elongated flexible tube to define an annular space which may be pressurized to pressure test a section of pipe between the seal members. The tubular member defines a flow passage for pipeline fluid during operation of the apparatus. A fluid motor is disposed in the passage and drivably connected to a hydraulic pump which receives fluid from the pipeline to pressurize the seal members and the annular space. The pump may be remotely controlled by radio control receiver-transmitter apparatus to operate the pressure testing apparatus and to monitor pressures in the seal members and the test space. The pump and control members may be disposed in a housing which is mounted adjacent one end of the apparatus. The apparatus is propelled through a pipeline by pressure fluid in the line.

Abstract: A pipe test disk has a planar disk portion having a lower circumferential edge portion which is joined to a pipe end and an upper circumferential edge portion which is joined to a fitting, a center portion through which an opening is formed for inlet of fluid to pressurize the pipe for testing, and a coupling pipe portion surrounding the center portion and extending upwards from the disk portion for coupling to an external fluid pressurizing apparatus. The pipe end, test disk, and fitting are solvent welded together. When the testing is completed, the coupling pipe portion is broken off and the disk portion is cut out to leave an open passage between the pipe end and the fitting.

Abstract: The present disclosure is directed to a portable elongate frame made of multiple lengthwise stringers which support the pipe testing apparatus. The frame has upper and lower stringers which are laced together by cross connected braces, and said stringers assemble into an elongate structure having first and second carriages at opposite ends thereof. The two carriages support first and second test heads for the pin and box of the joint. They are equipped with resilient members which squeeze against the pipe, contact the joint on the interior on the pin end, and on the exterior at the coupling at the box end. The structure is formed of multiple lengthwise stringers, the stringers at one side being hinged, and the stringers at the opposite side being released by a latch means to enable the structure to be folded into two equal portions for easy mounting behind a tow vehicle connected therewith by a V-shaped trailer hitch.

Abstract: An apparatus and method for pressure testing pipe segments. The apparatus including a main body portion thereof with seals located at either end for sealing the main body portion to the inside of the pipe segment. The body portion being withdrawn and inserted into the pipe segment by an extended draw bar attached to one end thereof.

Abstract: A pipe end sealing element for use in hydrotesting of plain end pipes, such as instrument tubes of a nuclear reactor, and a method of hydrotesting of such plain end pipes. The pipe sealing element comprises a hollow tubular member with a bevelled flange at one end and a threaded portion at the other end, a hollow conical bushing of decreasable interior diameter having a bevelled surface complementary to the bevelled surface of the tubular member, a sealing plug and threaded bolt engageable with the threaded portion of the hollow tubular member. The hollow tubular member is placed about the open end of the pipe, with the threaded portion thereof adjacent and beyond the pipe end, and inserting the conical bushing into the hollow tubular member about the pipe wall. The sealing plug is placed on the pipe end and the threaded bolt engaged with the threads of the hollow tubular member.

Abstract: A multi-purpose pipe and seal/alignment device is provided for sealing pipe ends against internal or external pressure while protecting the pipe end preparation from damage to facilitate a permanent pipe joining process at a remote location in an adverse environment.

Abstract: Method and apparatus to hydrostatically test tubular members including a housing to enclose each end of the tubular member, which housing supports a unitary seal-lock ring assembly, the assembly having an annular resilient body with non-resilient L-shaped segments adjacent at least one end, anti-extrusion means adjacent the other end and an adjacent inner surface of the resilient body to close, seal and lock either or both the housings, selectively, about the open tubular member ends without closures engaged in or on the tubular member ends and without an axial end compressive force on the apparatus during hydrostatic test procedures.

Abstract: A tubing string testing tool having three separate isolated passageways for allowing separate and independent control over the packer or sealing systems as well as for each of two separate testing fluids. The tool is comprised of a plurality of separateable elements that can be connected together to develop the desired length testing tool to correctly position sealing assemblies along the interior of the tubing string to form annular test cavities within the tubing string to isolate joints and tubing wall sections so that a plurality of joints and tubing wall sections can be simultaneously tested. Each of the separate elements include three internal passageway systems and the connection between each employs three separate annular chambers for interconnecting the passageways together between the elements and along the entire length of the tool or along desired portions of that length.

Abstract: An apparatus for hydrostatically testing the pipe threads on the end of a length of pipe onto which a coupling is adapted comprising a cylindrical body member that is inserted inside the end of the pipe and having attached thereto a hydraulically activated pressure resistant first seal that contacts a plurality of second seals arranged annularly of the cylindrical body member between its flange and the cylindrical body whereby the second annular seals are forced outwardly and into contact with the inner surface of the pipe being tested in order to seal off the interior of the pipe so as to isolate test fluid introduced under pressure to the area surrounding the connection between the pipe and the cylindrical body member, a cylindrical nipple like pressure resistant third seal arranged at the opposite end of the cylindrical body member that is screwed into the exposed interior threads of the coupling, a fluid passageway that is arranged in the cylindrical body member for introducing a testing fluid under press

Abstract: Hydrostatic test apparatus for pressure testing fire hoses, pressure vessels such as fire extinguishers, or the like, including a small, portable unit having an inlet line for connection to a hose from an ordinary water tap, for example, an outlet line connected to the item to be tested, a pump, a first bypass line between the inlet lines for filling the item being tested, a control valve in the first bypass line which is closed during testing to prevent backflow of test pressure into the water supply, a pressure gauge in the outlet line for reading test pressure, and an adjustable relief valve in a second bypass line between the inlet and outlet lines for setting a predetermined test pressure. Air vents or bleeds allow the apparatus to be completely bled of air before testing to assure accuracy of the test pressure readings. The apparatus operates on very low water volume for safety.

Abstract: In common with conventional testing tools for this purpose, the present tool incorporates a central mandrel carrying a pair of vertically spaced packers which are expandable by fluid pressure, which mandrel forms a longitudinal bore having an outlet communicating with the annular space between the packers. In contradistinction to the prior tools, the bow spring and slips suspending assembly of the prior tools has been eliminated. Instead, the packers themselves are relied on to suspend or fix the tool in the tubing. To achieve this end, a novel valve assembly has been provided to control the admittance and bleeding off of pressurized fluid into the annular space. The valve assembly is adapted to first admit pressurized fluid into the annular space to set the packers and pressure test the tubing wall between the packers at relatively high pressure, for example 5000 psi.

Abstract: Repaired fluid conveying tubes are tested for leaks by isolating the repaired region from the remainder of the tube and then pressurizing the isolated region with a suitable gas. The isolation is accomplished by axial compression of one or a pair of seals which expand radially when subjected to axial force.

Abstract: A method of and apparatus for hydrostatically testing threaded pipe is disclosed that moves the pipe into position to have a first end cap made up on one end, moves the pipe into position to have a second end cap made up on the other end, and lowers a shield onto the pipe before it is tested. The apparatus includes a mandrel that is attached to the first end cap. The mandrel is supported and rotated by a socket but can move out of the socket to travel with the pipe as the pipe is moved to receive the second end cap.

Abstract: A pipe testing tool in the form of an elongated tubular member positionable within a pipe and which includes spaced, radially expandable sealing rings to contact the inner surface of the pipe and define at test section. The tool includes a through bore to carry pressurizing fluid which is used to cause the sealing rings to expand and then to pressurize the test section for leakage testing. A radial conduit from the through bore provides communication with a movable cylinder to compress the sealing rings and an escape chamber is provided to permit pressure release of trapped air between the cylinder and the sealing rings. The radial conduit is preferably spaced at least two conduit diameters away from a threaded portion to reduce stress concentrations and thereby avoid failure of the tool due to flexing during handling and use thereof.

Abstract: This invention teaches a method and apparatus for the determination of the weight of a moving vehicle driven by an internal combustion engine. The invention provides means for the determination of a value corresponding to the driving torque of the engine, and for the determination of an acceleration value corresponding to the acceleration of the vehicle. The measuring means are controlled in such a manner that the torque value can be determined at the same time as the acceleration value. Furthermore, a calculating device is provided in which one or two values of the driving torque value--determined at different times--as well as values of the acceleration variable--determined at said times--are utilized for the determination of a weight variable corresponding with the weight of the vehicle.

Abstract: The invention concerns a press for the testing by means of internal pressure of tubes provided with threaded ends, in which end pieces screwed in a pressure medium-tight manner on the tube ends are inserted into the sealing heads of the press. The end pieces are cap-like and have radially arranged connecting boreholes so that the pressure medium feed is radial in contrast to the axial pressure medium feed of the familiar constructions. No appreciable axial forces thus arise between the tubes and the test heads. In addition, the outer end of the cap-like end pieces facing away from the tube serves for the coupling of a shaft, which can displace the tube with the end piece axially and act upon it with a torque. Furthermore, the sealing head is readily detachable in a like manner in a retaining head and is inserted pressure medium-tight to the outside, just as the end pieces in the sealing heads.

Abstract: An apparatus and method suitable for simultaneously testing the integrity of the joints and walls of a plurality of interconnected pipe sections is disclosed. Further, the present invention includes a method and apparatus for sequentially setting at different pressures the packers of such a device. A further feature of the present invention is the actuation of the pressurizing of an annular pipe section testing chamber by the setting of a packer adjacent to the chamber.

Abstract: A handle stem for a bicycle which comprises a stem body, a projecting portion extending radially outwardly from the top of the body, and a holding portion provided at the utmost end of the projecting portion, and is provided at the upper portions of the projecting portion and holding portion with a mounting surface made continuous on the same plane so that on the mounting surface is mounted a box of a display apparatus for electrically displaying operation, such as speed or a running distance, of the bicycle, the box being formed about the same in shape and plane size as the mounting surface.

Abstract: A hydrostatic pipe testing tool for use in oil field in cooperation with the bar string has upper and lower mandrel tools substantially identical and comprising a cylindrical collar threadably connected to a cylindrical piston and coaxially alligned with it so the central bores of the collar and the piston fluidly communicate with each other. A shaft integrally attached to the piston has a sleeve slidably mounted thereon. Two resilient sealing elements are spaced by three steel spacer rings and mounted circumferentially and slidably on the sleeve. Another sleeve is provided for attaching the shaft and the first sleeve to a bar string. The filling port of enlarged diameter is made perpendicularly in relation to the central bore in the piston portion of the mandrel and a filling jet is disposed at 45.degree. angle in relation to the central bore. A plurality of O-rings define fluidly sealed chambers for facilitating testing of the tubing within a well bore.

Abstract: A cylinder gripping apparatus having a jaw, a body and a floating interfacing assembly having a curved surface bearing against an opposing surface or groove, the interfacing assembly being operable to generate a proportional gripping force in response to an axial force upon the cylinder to be gripped. The jaw is not connected to the body. The interfacing assembly is operable to permit a transverse displacement of the jaw.