119results about How to "Prevent unscrewing" patented technology

A medical device 1 for use in treatment of a valve comprises a treatment element 2 which is configured for location at a region of coaption of leaflets 3 of a valve to resist fluid flow in a retrograde direction through an opening 7 of the valve. The device also comprises a support 4 for the treatment element 2, and an anchor 8 for anchoring the support 4 to a heart wall. The treatment element 2 and/or at least a part of the support 4 comprises a hydrogel.

An anterior lumbar plate for attachment with bone screws to selected vertebrae of a person's spine is combined: (a) with separate L5 and S1 drill guides separately and removably attachable to the lumbar plate, and (b) with lock plates removably attachable to the lumbar plate to prevent unscrewing of installed bone screws. This invention further provides a method for implanting and locking in place the L5 and S1 bone screws. This invention is adaptable for L4-L5, L4-L5-S1, and L5-S1 lumbar plates.

This assembly is of the type including: a vessel (4) for containing liquid, the vessel (4) having a neck (14); a dispensing dropper end fitting (6) disposed at the end of the neck (14); and a cap (8) for closing the vessel (4), provided to be screwed onto the neck (14). In a preferred embodiment, the cap (8) and the neck (14) have safety element preventing the cap (8) from being unscrewed simply by applying an unscrewing torque, and allowing the cap (8) to be unscrewed when an additional action is applied together with the torque for unscrewing the cap (8).

A locking device (1) is fixed to a nut (4) and includes a coupling unit (42) insertable into a hexagonal configuration (11) of a spigot end (2) at a reduced axial distance being coupled by mutually interpenetrable gears (49, 51) with a stop unit (38) which axially slides in a body (18) opposite to a compression spring (36). The gears (49, 51) are symmetric and are insertable into each other with a predetermined elastic resistance by the action of compression or loosing torque. The device is embodied in one piece which is mounted by assembling with the nut without affecting the spigot ends (2, 3).

A method is presented to allow a quick, positive attachment of a fastener to a module body. The module body and the fastener each have interrupted screw sections to connect with a partial turn. A latching mechanism, such as a pawl and cog arrangement, can provide a positive lock when the interrupted screw threads are fully engaged. A mechanism such as tab lever can be used to disengage the positive lock to easily remove the module. The controlled traverse over a known thread pitch allows the use of a compressible face on the fastener with a fixed compression and a repeatable, tight connection.

The present invention provides an optical color wheel component and an optical color wheel thereof. The optical color wheel comprises a base unit, a light-transmitting unit, and a fluorescent unit. The base unit comprises a central hole, a central axis, a light-transmitting region, and a reflective region. The central hole is arranged along the central axis. The light-transmitting region and the reflective region are connected to go around the central axis. The light-transmitting region is provided with a through hole. The light-transmitting unit is arranged in the through hole and is surrounded by the through hole. The fluorescent unit is arranged on the reflective region and goes around the central axis. The invention also provides an optical color wheel component.

The invention discloses a method for preventing a fastening nut from being stolen, an anti-theft nut and a special sleeve tool. A nut with internal threads is made into a cylindrical nut; when the cylindrical nut and a bolt are connected and fastened together, a washer sleeve with a cover sleeve is arranged on the bolt, and the cylindrical nut is connected to the bolt through the threads and is screwed on the bolt through the special sleeve tool with a one-way needle bearing, so that the cylindrical nut tightly presses the washer sleeve and is covered by the cover sleeve on the washer sleeve; and when the nut is needed to be loosened, another special sleeve tool with the one-way needle bearing in a different rotating direction stretches into an inner hole of the cover sleeve on the washer sleeve and is sleeved on the nut to loosen the nut. The invention has the advantages that: the anti-theft nut is difficult to steal, has a good anti-theft effect and reliable performance, and is convenient to install, maintain and disassemble.

A device for locking a cap nut for a coupling includes a hooking plate 100 extended out of the body 50 connected to the metallic connecting pipe 21, a plurality of hooking protrusions 110 protruded from the hooking plate 100 at a regular space, and a plurality of hooking grooves 200 formed at a position facing the hooking protrusion 110 and engaged with the hooking protrusion 110 to prevent the cap nut 40 from being released when screwing the cap nut 40, so as to prevent the cap nut 40 from being released, so eventually securely assembling the connecting pipes 21 not to be separated from the coupling 10.

The present invention resides in a sensorized roller of a roller bearing. The sensorized roller includes a roller bore that accommodates a measuring device for measuring deformation of the roller bore and electronics for processing a deformation signal from the measuring device and wirelessly transmitting the processed deformation signal to an external receiver. According to the invention, the measuring device and electronics are mounted in a rigid housing that is shaped to fit within the roller bore. A radially outer surface of the housing includes at least one aperture associated with the measuring device. Furthermore, the rigid housing is resiliently mounted to the roller bore via first and second sealing elements that enclose a radial gap between a radially inner surface of the roller bore and a radially outer surface of the housing.

A valve pin adjustment system is provided for use in valve gated injection molding applications which enables adjustments to the positioning of the valve pin without necessitating removal of the clamping plates and valve assembly components, including valve pins. A piston associated with the valve pin includes a cylindrical body having first and second co-axially aligned internally threaded bores of respective first and second diameters. Preferably, the threads formed in the first and second bores are of the opposite hand. First and second externally-threaded cylindrical valve pin positioning members are respectively received in the first and second bores. Each of the positioning members includes a head portion and a tip portion. The tip of the second positioning member is in contact with the head of the first positioning member to lock the first positioning member in place, and the tip of the first positioning member is in contact with a head portion on the valve pin to locate the valve pin.

The invention relates to a farm trolley. The farm trolley comprises a seat (1) a lifting rod (2), an 'H'-shaped chassis (9) and two trolley wheels, wherein the bottom of the seat is connected with the lifting rod, two trolley wheels are arranged on a front support and a rear support of the 'H'-shaped chassis, a threaded pipe (4) is arranged in the center of the 'H'-shaped chassis, the lower part of the lifting rod has threads matched with those of the threaded pipe arranged in the center of the 'H'-shaped chassis, a bottom end of the lifting rod is connected with a stopper, a bottom face of the lifting rod has a threaded hole (8), a screw (7) is fitted with the threaded hole to lock the stopper on the bottom face of the lifting rod and prevent the lifting rod from coming out of the threaded pipe. The farm trolley has the advantages of convenient adjustment, safe and stable use, compact structure, low cost and adaptability to various agricultural environments.

The invention discloses a detachable electronic cigarette of a snap-on battery atomizer, comprising an atomizer assembly (A) and a battery assembly (B), wherein the atomizer assembly is positioned above the battery assembly. The atomizer assembly is mounted on the battery assembly and closely connected to the battery through two bayonets (26) inside the battery. A bayonet button (30) is arranged on the battery, and the bayonet button (30) on both sides of the battery can be pressed to eject the atomizer and thereby separate the atomizer from the battery. A purpose of separating the battery andthe atomizer by pressing the button (30) on the left and right sides of the battery and controlling the opening and closing of the oil inlet hole by means of elastic force and preventing the heatingcore from being screwed out when the child lock device is used for regulating air is realized.

The utility model discloses a sample support for scanning electronic microscope, to prevent the sample support screw from turning out of the base and jamming on the platform. The sample support comprises a sample platform and a base with a plurality of threaded hole in the middle, and a screw mechanism; wherein, the screw used for adjusting height is arranged at the lower part of the screw mechanism. The screw is connected with the threaded hole; the lower part of the screw mechanism can screw into the base without exceeding the base thickness; the sample platform is connected with the top of the screw mechanism. The screw mechanism consists of two parts, the lower part is provided with the screw, and the top is provided with a replaceable module which is connected with the lower part of the screw mechanism and the sample platform respectively via a fast release device; the fast release device is of threaded screw structure; and the height of each replaceable module is determined according to the real need.

A magnetic filter for a central heating system is disclosed, the filter including a separation chamber, a magnet for capturing magnetic particles within the separation chamber, an inlet for fluidly connecting to a central heating system circuit, an outlet for fluidly connecting to a central heating system circuit, and a single valve operable to select between at least two positions, the valve in a first position fluidly connecting the inlet to the separation chamber and fluidly connecting the outlet to the separation chamber and the valve in a second position isolating both the inlet and the outlet from the separation chamber.

Disclosed are apparatus and methodology for securing access to an underground device such as a storage tank. A lockable blocking plate is secured to a filler cap for an underground storage tank in a manner to inhibit access to the filler cap. The locking mechanism is configured such that the lock and blocking plate may freely rotate with respect to the filler cap. The blocking plate may include a side skirt extending to cover portions of the filler cap and, optionally, portions of a standpipe and coupling for the filler cap. Free rotation is enabled by way of an annular groove in a portion of the locking mechanism, and into which groove one or more locking portions may be inserted, or by way of a freely moving swivel boss attached to the filler cap.

The invention relates to a stepless height-adjusting supporter, comprising a spiral rotation body the two ends of which are respectively left-handed thread and right-handed thread; the two ends of the spiral rotation body are respectively provided with a left-handed thread cushion block and a right-handed thread cushion block which are matched with the spiral rotation body; a synchronizer which is arranged between the left-handed thread cushion block and the right-handed thread cushion block leads the left-handed thread cushion block and the right-handed thread cushion block to synchronously rotate correspondingly to the spiral rotation body. Owning to the synchronizer, the left-handed thread cushion block and the right-handed thread cushion block can be ensured to simultaneously move inwards or outwards along the axis line when the spiral rotation body rotates. According to different supporting requirements, different auxiliary transition supporters can be arranged on the left-handed thread cushion block and the right-handed thread cushion block, thus enlarging the application range of the stepless height-adjusting supporter. When the spiral structure is adopted to realize the stepless height adjustment, as the spiral structure has the characteristic that the spiral structure can only move in the axis line direction, the structure is compact and the stepless height-adjusting supporter can be convenient for use even in narrow space.

The invention discloses an impact test device with a lifting workbench, which includes a workbench, an impact mechanism and a lifting mechanism. The impact mechanism includes a base, a support frame, an impact hammer and a driving motor. The support frame is vertically arranged with the base, and the impact hammer is connected and supported. On the upper end of the frame, the drive motor drives the impact hammer to reciprocate up and down. The workbench is set close to the support frame and directly below the impact hammer. The workbench is a box structure surrounded by a top plate, side plates and bottom plates. Hinged, the top plate is provided with an impact pad at the position facing the impact hammer, and the lifting mechanism is located in the box of the workbench. The lifting mechanism connects the top plate to drive the top plate to rotate around the hinge point with the side plate. After the impact test is completed, the lifting mechanism drives the top plate to rise around the hinge point of the side plate, so that the sample to be impacted will slide off the top plate, and then the lifting mechanism drives the top plate to fall back to the level, and another sample to be impacted can be placed on the impact pad. This cycle realizes continuous impact test.

A fusion type optical connector is disclosed. The fusion type fiber connector comprises: a ferrule for supporting an optical fiber for the ferrule; a stopper for receiving the ferrule; a plug frame which is coupled to a part of the outer circumference of the stopper and has a groove formed at one end thereof; and a boot unit which supports a main optical fiber, is coupled with the other part of the outer circumference of the stopper, has a groove formed at one end thereof, and includes a first pressing part extending from the other end thereof and a second pressing part rotationally coupled with the other end thereof so as to cover the first pressing part.

A high security flush plug assembly includes a flush plug body threaded into a flush plug bore in a curb box flange, with a security bolt extending down through a hole in the flush plug body. The security bolt is received in a locking mechanism mounted thereto and extending below the flush plug body which when operated acts to engage the inside of the stand pipe to prevent any rotation of the flush plug body, preventing its removal until the locking mechanism is operated to release the engagement with the stand pipe.

The invention provides a built-in type anti-theft packaging bottle. The built-in type anti-theft packaging bottle comprises a bottle body, a bottle cap, an anti-theft ring and a connecting rib, wherein threads are formed on the outer wall of the bottleneck of the bottle body and the inner wall of the bottle cap respectively; the inner wall on the lower side of the bottle cap is sunken outwards to form an accommodating cavity for accommodating the plastic anti-theft ring; the inside surface on the upper side of the bottle cap is superposed with the inner surface of the anti-theft ring; the anti-theft ring is connected with the inner wall of the bottle cap through the connecting rib; a plurality of clamping columns are formed on the inner wall of the anti-theft ring at intervals; first clamping grooves matched with the first clamping columns are formed in the corresponding positions of the outer wall of the bottleneck; the thickness of each first clamping column is gradually reduced in the clockwise direction of the inner surface of the anti-theft ring until the first clamping column is flush with the inner surface of the anti-theft ring; the thickness of each first clamping groove is gradually reduced in the clockwise direction of the outer surface of the anti-theft ring until the first clamping column is flush with the outer surface of the anti-theft ring; when the bottle cap is screwed tightly, the first clamping column can be clamped into and slide through the corresponding first clamping groove; and when the bottle cap is rotated reversely, the first clamping groove prevents the first clamping column clamped in the first clamping groove from rotating continuously.