Abstract: The present disclosure provides lockable cover assemblies that can cover mounting fasteners used to secure network devices to mounting structures, including racks, rack-mounted enclosures, cabinets or other mounting enclosures used to mount network devices, or utility boxes used to mount network devices. The lockable cover assemblies can be configured to cover the mounting fasteners of one or more network devices or the lockable cover assemblies can be built into a mounting enclosure and lock each network device in the rack.

Abstract: A universal holder for a folding lock has a base bar fastenable to a bicycle strut and formed by a lower rail and an upper rail that can be displaced relative to each other and locked relative to each other by a mounting assembly. A retaining strap extends transversely across the base bar and is connectable to two sides of the upper rail. A support cup is provided on a lower end of the lower rail.

Abstract: A stopper that can be attached to a pair of handcuffs. The stopper making handcuffs safer for people wearing the handcuffs. The stopper being effective for providing an acceptable measurement of space between the handcuff and the wearer's limb.

Abstract: A latch assembly includes a housing, a door latch member and a release member. The door latch member pivots about a first pivot axis. The release member pivots about a second pivot axis spaced apart from the first pivot axis located within the housing operatively coupled to the latch retaining member. An inertia activated lock-out mechanism is fixedly attached to the housing and includes a locking member within the housing that pivots about a third pivot axis spaced apart from the first and second pivot axes. The first, second and third pivot axes are all parallel to one another at fixed locations within the housing. The locking member pivots between a locking position preventing movement of the release member and a non-interfering position in which the locking member is spaced apart from the release member allowing the release member to be movable.

Abstract: The object of the invention is to be able, with little expenditure of electrical energy and within a short time, to change over a lock, which can be opened electrically, such that said lock can also be opened mechanically. To achieve this, a locking device with a lock, in particular for a motor vehicle, is provided with a locking mechanism, the rotary latch of which can be latched to at least one pawl in a main latching position and in a preliminary latching position. The locking device has an electric drive with which the lock can be opened electrically in normal operation. It furthermore has an actuating device with which the lock can be changed over from normal operation to emergency operation in the event of an emergency. During this changeover, the lock is adjusted from the main latching position into the preliminary latching position, and the lock can be opened mechanically in said preliminary latching position.

Abstract: An attachment structure for a door lock device includes (1) a rod provided at an outer side section, that is disposed such that a length direction of the rod is in the vehicle vertical direction, and that is coupled to a door outer handle to move vertically upon operation of the door outer handle; (2) a releasing section provided at an inner side section, that includes a joining section to which the rod is joined from the vehicle width direction outside, and that releases a locked state of the door lock device upon vertical movement of the rod; (3) a restricting section provided at the outer side section, and that restricts movement of the rod toward the vehicle width direction outside and in the vehicle front-rear direction; and (4) a guiding section provided at the releasing section, and that guides the rod into the joining section.

Abstract: A vehicle door lock having a rotary latch arrangement and a release mechanism. The rotary latch arrangement includes a lock case in which a pivoted rotary latch and a pivoted locking pawl are arranged. The release mechanism includes a first release device with a traverse tube, a cable pull mechanism with a traction element led through the traverse tube and means for actuating the cable pull mechanism, and a pivotable actuation lever that engages in the lock case and which comprises two opposite actuation lever lateral surfaces. The actuation lever is rotatably connected with the first release device to be driven about an actuation lever rotary axis, wherein the locking pawl can be actuated by rotating the actuation lever so that the locking mechanism of the rotary latch can be released.

Abstract: A device for sealing a container door, according to the present invention, comprises: a main body on the upper end of which a guide hole and a locking hole are penetratingly formed; a locking member, which is installed on the main body so as to slide vertically along the guide hole, and which is provided on one end with a locking bar that is inserted into a mechanical seal hole on the container door by moving in and out of the locking hole; a fixing unit, which is installed inside the main body, for fixing the locking member when the locking bar on the locking member is inserted into the inside of the locking hole, and of which one end protrudes out of the main body so that the fixed state of the locking member can be released through an operation by a user; a seal-release authentication unit, which is installed on the main body, for wirelessly communicating with a near field communication module carried by an outside user; a holding unit, which is installed inside the main body so as to come into contact wit

Abstract: A vehicle door latch for preventing locking includes a locking lever rotating on a first shaft. A safety knob lever has one end facing the locking lever and restricts the rotation of the locking lever and movement of a door opening unit by engaging with one end of the locking lever. The safety knob lever locks a vehicle door or unlocks the door by disengaging. A latch gear is disposed on the first shaft, which opens/closes the door by engaging with or disengaging from a striker in accordance with the movement of the door opening unit when an inside handle and an outside handle move. An elastic member is disposed on the latch gear. The elastic member is in contact with the locking lever and provides an elastic force to the locking lever when the latch gear rotates in a counterclockwise direction.

Abstract: A closure for a toggle clamp for an industrial truck, wherein the closure has a holding part, a holding axle mounted to the holding part, a closure part, wherein the closure part has an anchoring element, a closing lever, a boundary axle mounted to the anchoring element, a closing lever pivotably mounted to the closing lever axle, a latch axle mounted to the closing lever, a latch mounted to the closing lever axle, the boundary axle, pivotably mounted to the latch axle, and the latch nose configured to engage the holding axle, a first spring element attached to the closing lever axle, and a second spring element attached to the latch axle, and a pivot axle configured to be attached to the industrial truck.

Abstract: A latch for a door of motor vehicle having a closing assembly adapted to cooperate with a latch striker comprising: a ratchet which can assume an opening position, in which ratchet enables engagement and disengagement between latch striker and a seat of ratchet, and a closing position, in which ratchet holds latch striker within seat; a first pawl rotatable about a first axis (B) and in a first rotation direction from a coupled position, in which it keeps, at least indirectly, ratchet in closing position and prevents disengagement of striker from seat, and a decoupled position, in which it permits the movement of ratchet from closing position to opening position; and a second pawl which cooperates with first pawl, cooperates with ratchet at least in a contact point (P) at least when ratchet is in closing position, and which is rotatable about a second axis (D) distinct from first axis (B).

Abstract: Disclosed is an adjustable lock system for securing a door to a doorjamb. The lock system comprises a striker assembly mounted to the door, the striker assembly comprising a horizontal striker rod, a pivoting arm, the free end of which is perpendicularly attached with the striker rod, and a striker housing for housing the pivoting arm therewithin, the striker housing comprising a position hole for the striker rod to extend therethrough as the pivoting arm is received therewithin, the position hole to restrict the pivoting movement of the striker rod between a upward striker position to a downward striker position wherein, the various positions between the upward and downward striker positions accommodate various variations of door sag. The receiver assembly comprises a horizontal striker groove for, as the door is closed, retainably receiving the striker rod therewithin.

Abstract: A door and gate stop capable of stopping a door on a step-up threshold when, in a closed door position, the ground level clearance for the door is substantially nil and in an open door position, the ground level clearance exceeds at least three inches. The door stop is attached at a location on the door that is determined by the length of a stem member being able to effectively stop the door. The door stop stem member is pivotally connected to a base platform. The stem member is at least five inches or longer in length (typically 12 inches). A catch holds the door stem vertical to a door in a stowaway position when the door stop is not in use.

Abstract: A door opening/closing device including a door, a locking hook mounted on an inner surface of the door, a solenoid mounted in a device housing, a locking lever connected swingably to a movable iron core of the solenoid and having a free end on an opposite side of a connection portion, and a controller for controlling the solenoid, in which the controller executes control so as to, if the door is closed and locked, separate the locking lever from the locking hook to release locking in conjunction with the movable iron core retreated by an electromagnetic attracting force by executing conduction control of the solenoid, and maintain an unlocked state while the door is closed by executing non-conduction control of the solenoid after unlocking and bringing the free end of the locking lever into contact with the locking hook by a return spring force.

Abstract: A connector and an electronic device that includes the connector are described. The connector includes a first helical gear for connecting with a first part of an electronic device; a second helical gear for connecting with a second part of the electronic device; and an intermediate helical gear located between and engaged with the first helical gear and the second helical gear, wherein axes of the first helical gear and the second helical gear are parallel to each other, and an axis of the intermediate helical gear is orthogonal to that of the first helical gear and the second helical gear, so that the first helical gear and the second helical gear are rotatable synchronously via a rotation of the intermediate helical gear, wherein the first helical gear and the second helical gear are engaged with the intermediate helical gear via respective line contacts.

Abstract: The description relates to devices, such as computing devices that have hinged portions. One example can include a first portion and a second portion. This example can also include a sequential multi-pivot hinge assembly rotatably securing the first portion and the second portion. The sequential multi-pivot hinge assembly can include a first set of links configured to control a relative order of rotation around individual axes of rotation of the sequential multi-pivot hinge assembly when the first and second portions are being rotated away from one another and a second different set of links configured to control the relative order of rotation around the individual axes of rotation of the sequential multi-pivot hinge assembly when the first and second portions are being rotated toward one another.

Abstract: A supporting mechanism and a sorting machine having the same are provided. The supporting mechanism includes a supporting body. An annular sliding slot is formed on a section of surface of the supporting body. A U-shaped clamping slot is provided in a ring of the annular sliding slot. A one-way deflecting locating valve plate is provided at the position of an opening of the U-shaped clamping slot and configured to close the annular sliding slot, and the locating valve plate is provided with a reset force configured to ensure a tendency of the locating valve plate to close the annular sliding slot. A deflecting angle of the locating valve plate ensures that a free end of the locating valve plate deflects from one side to another side of the opening of the U-shaped clamping slot. The supporting mechanism has a simple operation and a high efficiency.

Abstract: A swinging-sliding door module for a rail vehicle is provided, the swinging-sliding door module including a door leaf and a rotatably mounted rotary pillar coupled to the door leaf. Furthermore, the swinging-sliding door module includes a support which is oriented longitudinally in the sliding direction of the door leaf and is mounted so as to be displaceable transversely with respect to the longitudinal extent thereof in the horizontal direction in relation to the rotary pillar and in which the door leaf is mounted displaceably. A first over-center locking brings about the deployment movement of the support. Furthermore, the coupling between rotary pillar and door leaf includes a second over-center locking which acts in the deployment direction of the door leaf.

Abstract: A continuous hinge comprises a first leaf and a second leaf each defining a longitudinal channel, a plurality of barrels defining bores open at each end, each of the barrels including a flange configured to be received in the channels of the first leaf or the second leaf, means for attaching the flanges of the barrels in the channels of the first and second leafs, wherein the barrels may be placed end-to-end for axially aligning the bores of the barrels, and a pivot pin extending through the bores of the barrels. The pivot pin is coextensive with the barrels for joining the barrels and the first and second leaves for relative pivoting movement about the pivot pin. The barrels attached to the first leaf are interspersed between the barrels attached to the second leaf in alternating relationship.

Abstract: Devices and assemblies for adjusting a position of a movable body (24) are disclosed. An exemplary device for adjusting a position of a body rotatable about a hinge axis comprises: a first portion (36a) configured to be secured to a structure (32a); and a second portion (38a) adjustably coupled to the first portion and configured to be rotatably coupled to the body. The second portion comprises an adjustment mechanism for adjusting the body along the hinge axis relative to the second portion.

Abstract: A hinge dampening device is provided for a granulation processor having a bowl and a lid. A dampening device includes first and second spaced apart hinge supports fixed to the bowl and a pin extending through the lid collar residing between the hinge supports. The first end of the pin is fixed to the first hinge support, and a second end of the pin extends through the second hinge support. An adjustable compressive force is applied axially to the hinge supports and lid collar to create frictional resistance to rotation of the lid. The rotational resistance provides controlled opening and closing of the lid.

Abstract: A detent hood hinge which includes a hinge bracket fixed to a vehicle body, and a hinge arm rotatably coupled to the hinge bracket at a first end, a hood being coupled to a second end of the hinge arm may include a detent bracket coupled to the hinge arm and having a slide hole perforated on one side, a sleeve pin mounted so as to protrude from the slide hole at one end and coupled to the detent bracket so as to be slidable along the slide hole, a spring configured to be elastically deformed in accordance with sliding of the sleeve pin, and a lock stopper fixed to the hinge bracket and formed with a seating groove.

Abstract: The invention concerns a strap hinge (1) for a separating element. The separating element takes the form of a door, for example, in particular a swing door. The strap hinge (1) comprises two active units. The strap hinge (1) is provided with securing units (27 to 29), which are actively connected to a surface owing to a radial movement. The strap hinge further comprises pressure units (40, 43). The strap hinge (1) offers the same properties as a strap hinge which is provided with a hydraulic braking device.

Abstract: A closing hinge device includes a fixed element, a movable element and a pair of counteracting elastic members. One of the movable element or fixed element includes a generally box-shaped hinge body with a pair of working chambers to slidably house the counteracting elastic members. The other of the movable element or fixed element includes a pivot having a cylindrical portion that includes a pair of substantially equal grooves angularly spaced at 180° and each having a helical portion, the grooves communicating with each other to define a single guide element passing through the cylindrical portion. The box-shaped hinge body includes elongated slots, a pin being inserted through the single guide element and through the elongated slots to slide therethrough, and the counteracting elastic members act on the pin to promote the automatic returning of the closing element from the open position to the closed position.

Abstract: The utility model provides a hinge, including a hinge base (1), a hinge arm (2) movably arranged with the hinge base (1), and a supporting frame (3) and a bracket (5) arranged between the hinge base (1) and the hinge arm (2), wherein a rocker arm (6) and a spring connecting rod (8) are arranged in cooperation with the bracket (5), a first spring (7) is arranged between the rocker arm (6) and the bracket (5), a second spring (9) is sleeved on the spring connecting rod (8), a roller (61) is arranged in cooperation with the rocker arm (6), and clamping positions (21) which are mutually clamped when the rocker arm (6) and the hinge arm (2) are located at first limit positions and side faces of the hinge arm (2) which are mutually propped when the rocker arm (6) and the hinge arm (2) are located at second limit positions are arranged on the hinge arm (2) in cooperation with the roller (61).

Abstract: A tailgate of a motor vehicle has an opening apparatus configured to avoid overshooting during opening of the tailgate. The opening apparatus is connected to a silicone damper to bring about a damping action in the opening direction and a freewheeling action in the closing direction. Additionally, the opening apparatus is configured so that closing of the tailgate and lock actuation are not impeded.

Abstract: A damping unit includes a cylinder which is filled with a damping fluid and in which a piston rod is guided, the piston rod associated with a bottom surface which has at least one axial through-hole which defines an effective flow cross section for the damping fluid; wherein the piston rod includes: a sleeve element which is fixed on the piston rod in the axial direction; a piston bottom element which is supported on the piston rod so as to be axially slidable and includes the bottom surface; a resilient element; and a termination element which is fixed on the piston rod in the axial direction and forms an indirect or direct stop for the piston bottom element in the insertion direction of the piston rod.

Abstract: A vehicle window opening device includes an open-close controller, a drawing determination unit, a restriction unit, and an initial mask zone setting unit. The drawing determination unit determines that a vehicle window has drawn in an object when a characteristic value of a motor is greater than or equal to a determination threshold value. The open-close controller executes anti-drawing control based on the drawing determination. The restriction unit restricts the open-close controller from executing the anti-drawing control when the vehicle window is located in the initial mask zone. The initial mask zone setting unit sets an initial mask zone to a normal value when a position where the vehicle window starts to open is located outside a fully closed region and to a fully closed region value that is greater than the normal value when the position where the vehicle window starts to open is located in the fully closed region.

Abstract: A vehicle door is operated in accordance with a desired speed pattern. A vehicle door opening-closing control device 1 includes a power-supply voltage detecting unit 2 that outputs a detection value of a power-supply voltage of an electric motor 13, a reference control pattern storage unit 3 that stores a reference control pattern that indicates a voltage command value or a speed command value for the electric motor 13, the reference control pattern is a control pattern of the electric motor when the detection value is within a predetermined range, a control pattern generating unit 4a that generates a corrected control pattern that is obtained by correcting the reference control pattern based on the detection value, and a PWM control unit 4 that controls the electric motor 13 based on the corrected control pattern.

Abstract: A sill assembly is used in a threshold system and includes a sill deck having first and second deck surfaces opposing one another and extending between first and second ends. The sill assembly further includes a sill base formed of a polymer and coupled with the sill deck continuously along the first deck surface between and to the first and second ends of the sill deck for supporting the sill deck between and at the first and second ends. A method of manufacturing the sill assembly includes the steps of providing the sill deck and depositing the polymer to form the sill base coupled with the sill deck along the first deck surface between the first and second ends of the sill deck.

Abstract: The present invention relates to a spacer 101 for forming a spacing between glass panes 201, 203, with a top part 103 and a lower metal foil 105, the two parts introduces an overlap 209, 211 parallel to the sidewalls of the spacer. By having overlapping regions at the side walls the spacer is stiffened and thereby spacers can be produced of quite thin material e.g. only thin metal foil.

Abstract: Certain example embodiments relate to seals for glass articles. Certain example embodiments relate to a composition used for sealing an insulted glass unit. In certain example embodiments the composition includes vanadium oxide, barium oxide, zinc oxide, and at least one additional additive. For instance, another additive that is a different metal oxide or different metal chloride may be provided. In certain example embodiments, a composition may be combined with a binder solution that substantially or completely burns out by the time the composition is melted. In certain example embodiments, a vacuum insulated glass unit includes first and second glass substrates that are sealed together with a seal that includes the above-described composition.

Abstract: A unit cell for a blind comprises an opaque portion; a pair of translucent portions which are respectively connected to both ends of the opaque portion and arranged opposite each other with respect to the opaque portion; and a pair of joining portions which are respectively connected to each end of the pair of translucent portions, wherein the translucent portions of the unit cell are foldable along a substantially center portion thereof.

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: An aerial ladder assembly for a fire apparatus includes a first truss member, a second truss member, and a plurality of rungs coupling the first truss member to the second truss member. The first truss member includes a first base rail, a first hand rail elevated from the first base rail, and a plurality of lacing members coupling the first base rail to the first hand rail. The second truss member includes a second base rail, a second hand rail elevated from the second base rail, and a plurality of lacing members coupling the second base rail to the second hand rail. The first truss member and the second truss member define a first zone and a second zone separated by a transition, and the first base rail and the second base rail have a first shape within the first zone and a second shape within the second zone.

Abstract: According to an embodiment, a ladder includes a side rail having top and bottom ends; at least two rungs connected to the side rail; a top cap disposed near the top end of the side rail; and a foot protrusion mounted to the top cap and shaped to physically engage a battery pack slot of a power tool, such that attaching the power tool to the foot protrusion secures the power tool to the top cap. According to another embodiment, a power tool storage apparatus, includes a base member shaped to be secured to a storage surface; and a tool engaging portion extending from the base member. The tool engaging portion is shaped to physically engage a battery pack slot of a power tool, such that attaching the power tool to the tool engaging portion secures the power tool to the storage surface. Other embodiments are also disclosed.

Abstract: A bracket assembly is disclosed to secure a cable bundle to a ladder rung. The bracket assembly includes a metal bracket and protective grommets. The metal bracket has a first member, side walls and second members. The first member of the metal bracket is parallel to the second members of the metal bracket. The protective grommets are secured to the metal bracket. The protective grommets have a base member, sleeves extending from the base member, a side member and a bottom member. The assembled metal bracket and protective grommets receive the ladder rung and the sleeves of the protective grommets wrap around the cable bundle positioned on the ladder rung to secure the cable bundle.

Abstract: Walk-through safety devices for ladders meeting ANSI and OSHA standards are positioned at the top end of the ladder and are comprised of two, juxtapose-position, mirror image members. One each is mounted on a respective ladder side rail, Each member includes a sleeve (or rectangular tube) which slides down over a respective ladder side rail, a pressure bar which is tightened against the side rail with a knob operated screw, a pivoting engaging lock plate, and a lock plate tab cover plate. A horizontal hand grip framework is held outboard of the ladder side rails vertically upward, being at an angle of about 14.5 degrees upward from the longitudinal axis of the sleeve and side rail when resting against a structure. The framework is held in that position by a flared tube which is bent in two directions.

Abstract: Drilling tool (1) for drilling openings in a cement ballast tank (3) of an oil rig in order to gain access to an internal space in the ballast tank comprising an electrical motor (6) driving a first shaft (7); a pump (8) driven by the motor for pumping well fluid in through an inlet (9) and out through an outlet (10); a gear (11) driven by the first shaft extending through the pump for reducing rotation of a second shaft (12); and a drilling head (14) having bits and at least one drilling head fluid channel and being driven by the second shaft (12), the outlet of the pump being fluidly connected with the fluid channel to pump well fluid out through the fluid channel.

Abstract: A method for predicting jumps in pore pressure of a subsurface includes the steps of obtaining a porosity and a resistivity log value while drilling; dividing a cross plot of the porosity and the resistivity log values into two regions where the split of the two regions is based on the following (I): R=0.062/ø1.5; averaging the obtained porosity and resistivity log values in the subsurface within a set interval to obtain a representative value of resistivity and porosity for the subsurface within the set interval; and giving a first warning of a high overpressure region if the representative value of resistivity at the representative value of porosity is lower than 0.062/ø1.5. The method may also include giving a second warning that a jump in pore pressure is coming within 100-300 meters if the normalized values of resistivity and porosity has a turning down point in its trajectory.

Abstract: An intelligent boring tool has a cylindrical body further comprised of a head mount and a body. The body has a plurality of push out members wherein each push out member is located inside a porthole. Each push out member is further comprised of a grinding plate and an O ring. A choke ring used for restricting the flow of outgoing water. A threaded adapter member to connect a length of pipe onto the head mount. Bottom threads located at a base portion of the body to allow for the connection of a drilling accessory. The head mount is further comprised of water holes lined up with the portholes to let water push on the push out members.

Abstract: A drill bit in which a cutting element support shoe is mounted to a drill bit member so that it covers a portion of a number cutting elements while leaving the cutting edges of cutting elements exposed to the formation. The drill bit member may include a bit body, blade, arm, or roller, for example. The drill bit member may include a recess into which the cutting element support shoe is received. Cutting element support shoe provides mechanical holding of the cutting elements within their pockets in addition to conventional brazing or other mounting techniques. Once installed, a hard facing material may be applied over the cutting element support shoe as appropriate for increased erosion resistance. In one embodiment, the cutting element support shoe is sized so that when mounted to the drill bit member it is elastically deformed, thereby providing additional cutter retaining force upon attachment.

Abstract: In accordance with some embodiments of the present disclosure, a method of configuring depth of cut controllers (DOCCs) of a drill bit comprises determining a primary depth of cut for a first radial swath. The first radial swath is associated with a first area of the bit face. The method further comprises configuring a primary DOCC for placement on the bit face within the first radial swath based on the primary depth of cut. In addition, the method comprises determining a back-up depth of cut for a second radial swath. The second radial swath is associated with a second area of the bit face that overlaps the first area of the bit face associated with the first radial swath. The method further comprises configuring a back-up DOCC for placement on the bit face within the second radial swath based on the back-up depth of cut.

Abstract: A rock drilling shank adaptor includes an elongate body having an internal flushing bore and an entry hole through the sidewall of the adaptor in fluid communication with the internal bore. The flushing hole is optimised to reduce the likelihood of fracture at the wall of the adaptor and in particular includes straight sections at axially forward and rearwardmost regions of the hole.

Abstract: A method and apparatus for communicating ends of adjoining shunt tubes on connected wellscreen joints involves positioning a jumper tube in a gap between opposed ends of adjoining shunt tubes on connected wellscreen joints. First and second sliding end connectors of the jumper tube are engaged with the shunt tube ends by moving the connectors into an extended position over the shunt tube ends and using slide lock components to lock the connectors with the shunt tube ends. If desired, the connectors of the jumper tube can be disengaged from the shunt tube ends by moving the connectors into a retracted position away from the shunt tube ends and by rotating the connectors, thereby unlocking the lock components.

Abstract: A tubular member having a longitudinal axis, a first end, and a second end is disclosed. The tubular member includes a pin connector including an external shoulder, an internal shoulder axially spaced from the external shoulder, and a plurality of threads in a region between the external shoulder and the internal shoulder that taper relative to the longitudinal axis at 1.0 to 1.5 inches per foot. The threads include an axial density measured in a number of threads per inch (TPI), and when the pin connector is threadably engaged with a box connector, each of the threads contacts a corresponding box thread on the box connector along a projected radial distance HC. In addition, the threads are configured such that the product of 2(?{square root over (3)})(HC)(TPI) is greater than or equal to 0.95 and less than or equal to 1.05.

Abstract: A drill string rod forms part of a drill string having one end configured with a male spigot portion to be received within a corresponding rod female sleeve end. To minimize stress concentrations within the threaded male and female coupling, the male spigot is configured with a large diameter or cross-sectional area being at least equal to the cross sectional area or diameter of the main length section.

Abstract: A percussion drilling apparatus is arranged to affect at least one characteristic of a shock wave produced in a drill string. The apparatus includes an elongate energy transmission adaptor having a shock wave modification sleeve configured with a free end and an attachment end projecting radially from an outer surface of the adaptor.

Abstract: The invention relates to a downhole-started self-locking casing centralizer, comprising a connecting part (1) and a connecting part (2) on both ends, a central supporting part being arranged between the connecting part (1) and the connecting part (2), and characterized in that the central supporting part comprises a hollow coupler, and at least three N-stage piston self-locking support devices extending by stages under pressure are evenly distributed along the circumference of the coupler, N?2. The invention has the following advantages: 1. a threaded integral structure is adopted; 2. a downhole-started self-locking support structure is adopted; and 3. a circular arc support cap helps ensure large support force and reduce damage to borehole walls.

Abstract: An artificial lift system for a well having a wellhead reciprocates a rod string with an uphole pump unit at the wellhead to operate a downhole pump unit in the well and lift fluid in the well. A rod segment coupled to the rod string at the wellhead has first opposing surfaces facing in first opposing directions. Opposing catchers are movable laterally relative to the rod segment at the wellhead. Each of the catchers has a face with second opposing surfaces facing in second opposing directions opposite to the first opposing directions. The catchers moved in a first condition have the second opposing surfaces disengaged from the first opposing surfaces of the rod segment, but the catchers moved in a second condition have the second opposing surfaces engaged with the segment's first opposing surfaces to hold the rod string in place.