38results about How to "Reliable tension" patented technology

A canopy assembly includes a canopy fabric, a plurality of tightening wires, and a fastening arrangement. The fastening arrangement includes a plurality of tension adjustment units. Each of the tension adjustment units includes a supporting frame, a ratchet gear, a main shaft connected to the ratchet gear and rotatably connected to the supporting frame, and a resilient locking member mounted on the supporting frame to move between a locked position and an unlocked position. In the locked position, the resilient locking member is pivotally moved to engage with the ratchet gear so as to limit the ratchet gear to incrementally rotate in one predetermined direction with respect to the supporting frame, When the resilient locking member is in the unlocked position, the resilient locking member is pivotally moved to disengage from the ratchet gear so as to allow the ratchet gear to freely rotate with respect to the supporting frame.

The tightener for rope saw machine includes a seat holding rolling bearing set on tightened saw bow base, one sliding bearing seat holding sliding bearing set on tightened saw bow base, a lead screw with one end set inside the sliding bearing and the other end extending beyond the rolling bearing seat, and one tightening wheel frame set around the lead screw with nut for connection and driving in between. The tightening wheel frame has its top set inside the runner on tightened saw bow base and bottom with wheel for the bead rope to be wound on. The present invention regulates the tightening state of the bead rope indirectly through the feeding of the rope saw machine, and this maintains the stable tightening force during cutting.

The invention relates to a hand sanding tool (10) with a sanding sheet (20), covering the underside (18) of the sanding plate and with clamping means (22, 24, 30), for fixing the sanding sheet (20) to the sanding plate (14), whereby the clamping means (22, 24, 30) comprise clamping bodies (24), pressing on the ends (21) of the sanding sheet, characterised in that the clamping body may be freely rotated about an eccentric axis (28) and the pivot axis (28) is arranged essentially perpendicularly above a concave curved retaining surface (22).

A folding table which includes: an upper support part for supporting the surface fabric and a lower support part for grounding; an upper support part is inserted into a guide tube of the lower support part by means of a shaft rod, and a support for the upper support part is formed at the bottom of the guide tube; Moreover, the upward extended shaft rod can also be used to insert a sunshade for expanded outdoor use with easy assembly. The upper and lower support parts and umbrellas can be folded separately and collected side by side, which greatly reduces the height and makes them more compact after folding.

A wafer has a device area on one side with a plurality of devices partitioned by a plurality of division lines. Either side of the wafer is attached to an adhesive tape supported by a first annular frame. A modified region is formed in the wafer along the division lines by a laser. The wafer is placed on a support member whose outer diameter is smaller than an inner diameter of the first annular frame. After applying the laser beam, the adhesive tape is expanded thereby dividing the wafer along the division lines. A second annular frame is attached to a portion of the expanded adhesive tape. An inner diameter of the second annular frame is smaller than the outer diameter of the support member and smaller than the inner diameter of the first annular frame.

Device for carrying a replacement safety valve in a well tube, with a straddle structure for placement inside a damaged “Down Hole Safety Valve” nipple seal area. It is comprising a pair of sealing assemblies (15, 16) to be activated upon setting of the device to seal said nipple seal area, and a locking dog assembly (17) for locking the device in the well tube, said elements being carried by a tubular mandrel (12). At least one of the sealing assemblies (15, 16) comprises a expandable element (22; 34) being activated by a pair of annular press elements (19, 20).

A method of processing a wafer having a plurality of devices partitioned by division lines, including attaching the wafer to an adhesive tape supported by a first annular frame, dividing the wafer along the division lines into a plurality of dies, and placing the wafer (and the adhesive tape) on a support surface of a support member before or after dividing the wafer, wherein an outer diameter of the support member in the plane of the support surface is smaller than an inner diameter of the first annular frame. The method also includes moving the first annular frame and at least a peripheral part of the support member relative to each other to radially expand the adhesive tape, thereby moving the dies away from each other, and attaching a second annular frame to a portion of the expanded adhesive tape arranged at the peripheral part of the support member.

An automatic adhesive pasting device structurally comprises a suction nozzle and a taking platform, wherein the suction nozzle and the taking platform are arranged on a rack, a first tensioning roller is arranged above the taking platform, a second tensioning roller is arranged below the taking platform, adhesive tape is pre-tightened to the taking platform through the first tensioning roller and the second tensioning roller, the taking platform is provided with a taking position, the suction nozzle sucks foam at the taking position under the action of external driving force and is in a static state at the moment, and then the taking platform moves in the direction far from the suction nozzle under the action of the external driving force to make the adhesive tape aligned with the suction nozzle in a suspended state; meanwhile, the second tensioning roller drives the adhesive tape on the back of the taking platform to move along with the taking platform so that the adhesive tape in the suspended state can move towards the back of the taking platform and be stripped off from the foam to be taken. According to the automatic adhesive pasting device, in the taking process, the situation that the foam drives the adhesive tape to move can be effectively prevented, and the adhesive tape is made to keep constant tension all the time; as a result, the production efficiency can be improved, and a good adhesive pasting effect is ensured.

Portable grinding tool (10), which has a grinding disc (22), on the underside of which a grinding disc (24) can be fastened, which is surrounded by its end (25) On the mutually opposite grinding disc edges (28, 30) and on them or on the two ends of the upper side of the grinding disc (22) are fixed by clamping devices close to the edge, forming the pivot frame (34) , can be simplified by the following measures: the grinding disc (24) is fixed by the holding device (38, 48, 49, 58) on the area away from the edge by its respective grinding disc end (25) and can be on the area close to the edge Movement upwards and thereby tensioned.

A wafer has a device area on one side with a plurality of devices partitioned by a plurality of division lines. Either side of the wafer is attached to an adhesive tape supported by a first annular frame. A modified region is formed in the wafer along the division lines by a laser. The wafer is placed on a support member whose outer diameter is smaller than an inner diameter of the first annular frame. After applying the laser beam, the adhesive tape is expanded thereby dividing the wafer along the division lines. A second annular frame is attached to a portion of the expanded adhesive tape. An inner diameter of the second annular frame is smaller than the outer diameter of the support member and smaller than the inner diameter of the first annular frame.

An improved device provides a cost-effective, time-effective way to stably and reliably affix soft tissues (e.g., tendon or ligament) to the surface of anatomical structures with comparable or greater strength and stiffness (e.g., bone). The device does not require specialized procedures or tools. A single device applies both incremental tensioning and compression to the soft tissue being affixed. The device allows the user, typically a physician or veterinarian, to reliably manipulate, control, and maintain tissue tension. The device is versatile, and can accommodate attachment of soft tissues of different sizes and mechanical properties to bone or to other soft tissues. These features provide flexibility to human and veterinary health practitioners in a variety of specialized areas including orthopedics, joint stabilization, soft tissue repair, spinal surgery, and plastic surgery.

A multipurpose pneumatic chuck is characterized by comprising a power shaft, a cylinder, an ejector cone and a plurality of small shaft expanding sheets. One end of the power shaft is connected with a power source, and the other end of the power shaft is fixedly connected with a cylinder sleeve. The cylinder is disposed inside the cylinder sleeve. One end of the cylinder is fixedly connected with the cylinder sleeve, and the other end of the cylinder is connected with the ejector cone. The conical surface of the ejector cone is fitly sleeved with the small shaft expanding sheets. An operating method of the multipurpose pneumatic chuck includes: the cylinder discharges, the ejector cone retracts from hollow space among the small shaft expanding sheets, and axial radius of a shaft formed by the small shaft expanding sheets decreases; shaft expanding sheets of matching sizes are selected and fitted, and a spindle of a paper roll is sleeved to the shaft formed by the shaft expanding sheets; the cylinder inflates, the ejector cone approaches to the hollow space among the small shaft expanding sheets, the diameter of the shaft formed by the small shaft expanding sheets increases, and the shaft expanding sheets support the mandrel of the paper roll to immobilize the paper roll; the power shaft drives the held paper roll to act. The multipurpose pneumatic chuck is adaptable to paper roll spindles of various sizes, allows expanding sleeves having different spindles to be convenient to switch, and is efficient; tension is stable and reliable.

The invention relates to the technical field of coal mine machinery, in particular to a chain stopper for a scraper conveyor. The chain stopper is formed by combining and welding a front vertical plate, a left positioning pin, a right positioning pin, a rear positioning pin, a top plate, a supporting plate and a handle, grooves which are arranged in a bilateral symmetry mode are formed in the lower end of the front vertical plate of the chain stopper, limiting hooks are arranged at the bottoms of the grooves, and a slope boss is arranged on the outer vertical face of the front vertical plate. The chain stopper is compact in structure, high in strength, light in weight, convenient to disassemble and assemble, reliable to use and capable of being conveniently used for adjusting the tensioning force of the chain of the scraper conveyor, and normal operation of equipment is guaranteed.

A portable grinding tool (10) which has a grinding plate (22), a grinding sheet (24) is fixed on the lower side surface of the grinding plate and encloses grinding plate edges (28, 30) contrapositing with each other using its end (25), and two ends of the upper side surface of the grinding plate (22) are fixed by a clamping device which is close to edge and composes a swinging rack (34), it is possible to simplify as follows: the grinding sheet (24) is fixed by holding devices (38, 48, 49, 58) on region apart from edge by means of each grinding piece end (25), and can move upwards on region nearby the edge, thus to be tensioned.

An automatic adhesive pasting device structurally comprises a suction nozzle and a taking platform, wherein the suction nozzle and the taking platform are arranged on a rack, a first tensioning roller is arranged above the taking platform, a second tensioning roller is arranged below the taking platform, adhesive tape is pre-tightened to the taking platform through the first tensioning roller and the second tensioning roller, the taking platform is provided with a taking position, the suction nozzle sucks foam at the taking position under the action of external driving force and is in a static state at the moment, and then the taking platform moves in the direction far from the suction nozzle under the action of the external driving force to make the adhesive tape aligned with the suction nozzle in a suspended state; meanwhile, the second tensioning roller drives the adhesive tape on the back of the taking platform to move along with the taking platform so that the adhesive tape in the suspended state can move towards the back of the taking platform and be stripped off from the foam to be taken. According to the automatic adhesive pasting device, in the taking process, the situation that the foam drives the adhesive tape to move can be effectively prevented, and the adhesive tape is made to keep constant tension all the time; as a result, the production efficiency can be improved, and a good adhesive pasting effect is ensured.

The invention discloses a spiral tensioning device of an air conditioning box access door. The access door is hinged with a heat-preservation plate of an air conditioner through hinges; the edge of a corresponding access door is provided with an inner door frame; the inner side face of the access door is rotatably provided with a connecting rod through a rotating shaft; the access door is provided with a first limiting sleeve and a second limiting sleeve corresponding the two ends of the connecting rod; the outer side face of the access door is provided with a sliding pin component comprisinga fixed part which is fixed on the access door and a sliding part which can slide along the fixed part; the sliding part can rotate in the direction perpendicular to the surface of the access door; athird limiting sleeve is arranged on the outer side of the heat-preservation plate; the sliding part is inserted into the third limiting sleeve; the connecting rod in the second limiting sleeve is provided with a first nut; the sliding part is provided with a second nut; the access door is provided with a through hole which is perpendicular to the surface of the access door; and a bolt is matchedin the second nut, and is matched in the first nut after passing through the through hole, so that the access door is tensioned on the inner door frame. The spiral tensioning device has a simple structure, is easy to implement, is reliable in tensioning effect and is suitable for popularization and use.

The invention relates to the technical field of cable processing, and discloses an anti-slack device for cable transportation, comprising a base, a pay-off roller and a take-up roller fixedly connected to the top of the base, and two groups of There are two supporting rods in each group, two fixed plates are symmetrically fixedly connected between the tops of the two groups of supporting rods, and two fixed plates are symmetrically fixedly connected between the adjacent sides of the two fixed plates. There are two limit rods, and two groups of sliding grooves are symmetrically provided on the sides of the two fixed plates, and the number of each group of sliding grooves is two, and two groups of sliding grooves are connected symmetrically in the two groups of sliding grooves. piece. The invention solves the problem that the cable is prone to slack during long-distance transportation, so that the cable will be scattered and entangled during the transportation process, thereby affecting the smooth progress of cable processing.