36results about How to "Prevent inward movement" patented technology

A hydraulic chain tensioner assembly includes a plunger slider received within an opening in a tensioner body to define a controlled clearance and a substantially fluid-tight chamber. Pressure in a supply reservoir that is in fluid communication with the fluid-tight chamber is controlled to a relatively low level by appropriate sizing of the feed orifice and a bleed orifice in communication with the supply reservoir. Thus, apply force of a shoe connected to a plunger on a chain is a function of stiffness of a main spring that biases the plunger outward, and is not substantially affected by pressure of a fluid source supplying fluid to the reservoir. A method of manufacturing a hydraulic chain tensioner assembly is also provided.

A union coupler assembly for coolant lines comprising a coupler body, a first coolant line end portion, and a second coolant line end portion. The coupler body has a passageway extending between first and second ends, two tapered annular grooves, a snap ring disposed within each tapered annular groove, and a plurality of o-rings seated in corresponding annular grooves. The coolant line end portions are fabricated from metal and have tapered ends and grooves formed in their outer surfaces. The coolant line end portions are movable between an engaged position, wherein the snap rings engage the grooves in the coolant line end portions, and a disengaged position, wherein the snap rings do not engage the grooves in the coolant line end portions. When the coolant line end portions are in the engaged position, the tapered end of the first coolant line end portion abuts the tapered end of the second coolant line end portion to prevent inward movement of the coolant line end portions, and at least one o-ring seals each coolant line end portion with respect to the coupler body.

A delivery assembly (10) for an implant (30) includes a release mechanism comprising a locking element (52) and a blocking member (56). The locking element (52) includes a latching pin (14) that engages with an eyelet (54) in the implant (30) to attach the implant (30) to a distal end of an inner catheter (36) of the deployment of the delivery assembly (10). The blocking member (56) prevents premature disengagement of the latching pin (14) from the implant (30). Withdrawal of the blocking member (56) allows disengagement of the latching pin (14) once the implant (30) has been correctly positioned within a patient's vasculature. The locking pin (52) and the blocking member (56) extend along the lumen of the inner catheter (36) from a handle (12) at the proximal end thereof, and are arranged such that a guide wire (34) is also able to extend through the lumen of the inner catheter (36). The locking pin (52) and the blocking member (56) preferably have a crescent-shaped transverse cross section. The release mechanism allows an implant (30) to be retrieved either during deployment of the implant (30) to allow the surgeon to correct any mislocation of the implant (30), or in order to remove a previously deployed temporary implant (30) from a patient.

The present invention presents a structure for preventing a shaft of constant velocity joint from coming off which allows changing design of connection between the shaft and an inner joint member to a type for disassembly or anti-disassembly. The anti-disassembly type is realized in such a manner that a wall at an opposite side to a shaft pulling out direction of a retaining ring groove of the shaft is used as a contacting part to a retaining ring, wherein at least two points are formed on the contacting part, one of which is on a perpendicular surface and the other is a corner of the contacting part, these two points are contacted with an inner surface of the retaining ring thereby provides the anti-disassembly type for preventing the ring from being contracted in a radial direction.

A chain or belt tensioner comprises a plunger displaceable in a housing between retracted and extended positions. A stop ring between the plunger and housing frictionally contacts a smooth surface of the housing. A recess in the plunger has a tapered face for engagement with a bevelled surface of the stop ring. Inward movement of the plunger causes the tapered face to engage the stop ring and to force it to deform outwardly to a wedging position in which the stop ring is wedged between the tapered face and the surface thus preventing further inward movement of the plunger. The recess has a second face that engages the stop ring when the plunger moves out of the housing so as to slide it over the surface. The invention provides for a stop mechanism that enables retraction of the plunger to be prevented at an infinite number of positions.

A cupcake carrier for organizing and protecting cupcakes during storage and transit includes a container formed of a singled sheet of planar material and having flaps folded in assembly to form an upwardly opening cavity carrying an insert tray formed of a single sheet of planar material and having circular openings for lightly compressively holding the cupcakes in a grid array. The insert is sized smaller than the base of the container to provide slots about the periphery. The container includes a hinged lid having flaps that enter the slots in the closed position to reinforce the outer walls and prevent inner movement of the flaps during transit and storage.

A track roller assembly may have a track roller, a roller shaft and collars press fit onto either end of the roller shaft to retain the track roller on the roller shaft with an axial clearance between the collars and the track roller. During assembly, the collars may be press fit onto the shaft ends and forced axially inwardly until further axial movement of the collars is prevented by engagement shoulders of the track roller. A compressive axial load may be applied to the roller shaft to reduce a shaft length of the roller shaft and to cause the roller shaft to slide inwardly relative to the collars. The compressive axial load is removed from the roller shaft so that the roller shaft extends back to the normal shaft length and the collars move axially farther apart as the roller shaft extends back to the normal shaft length.

The invention discloses a propeller clamp and a foldable propeller and relates to the field of unmanned aerial vehicles. The propeller clamp comprises a propeller seat, a propeller cover arranged on the propeller seat and an elastic piece arranged between the propeller seat and the propeller cover through a connecting mechanism and further comprises a limiting mechanism, the connecting mechanism comprises a connecting hole formed in the middle portion of the elastic piece and a connecting piece arranged on the propeller seat and matched with the connecting hole; and the limiting mechanism comprises limiting grooves formed in the tail ends of the elastic piece and limiting pieces arranged on the propeller seat and matched with the limiting grooves. An integrated spring leaf anti-loosening measure is adopted by the propeller clamp, screws can be effectively prevented from being loosened, anti-loosening operation is reliable, detachment and installation are easy, maintenance is easy, andan unmanned aerial vehicle propeller is convenient to replace and can be reused.

The invention relates to a spiral pipe welder spigot ring positioning device and belongs to the technical field of spiral reel pipe welders. The device comprises a spigot ring, an outer positioning block, a core mould cylinder body, a limit special nut, an inner hexagonal limit bolt, a hexagonal nut, a spigot ring positioning block, an adjusting gasket, a hexagonal head bolt and a cushion block, wherein a spigot ring front adjustable device is formed by the limit special nut, the inner hexagonal limit bolt and the hexagonal nut and is fixedly arranged on the core mould cylinder body through the limit special nut and the hexagonal nut, a spigot ring back positioning device is formed by the spigot ring positioning block, the adjusting gasket and the outer positioning block, the spigot ring positioning block is welded on the core mould cylinder body, and the cushion block is arranged between the front upper end surface of the spigot ring and the core mould cylinder body. The spigot ring can be accurately positioned and tightly clamped through the spigot ring front adjustable device and the spigot ring back positioning device. The spiral pipe welder spigot ring positioning device avoids the inward movement of the spigot ring due to mechanical vibration when a spiral welded pipe is produced, the coaxial line of the spigot ring and the core mould cylinder body is guaranteed, a steel plate and the spigot ring are firm in welding, and the quality of a product is improved.

A connecting device for connecting an accessory to a hitch receiver with an outward end defining an opening. The connecting device has a base with a body portion receivable in the hitch receiver. The body portion is adapted for coupling with the hitch receiver to locate the base in a predetermined position thereon. The connecting device also has a collar for engaging the outward end of the hitch receiver in an interference fit upon engagement of the collar with the outward end, the collar being coupled with the accessory. In addition, the connecting device includes a fastener operatively connected with the base for urging the collar against the outward end to cause the collar to engage the outward end. The connecting device connects the accessory to the hitch receiver upon engagement of the collar with the outward end of the hitch receiver.

A vehicle wheel, comprising a rim, a hub, a plurality of spokes extending between the rim and hub, a bracing element including a hole with a central axis, a sidewall, a longitudinally inward entrance, and at least one of an engagement surface and an engagement edge outward of the entrance, a connecting element connected to the bracing element, including an opening extending along an opening axis, and a multiplicity of prongs, with at least one of the prongs including a lateral overhang surface. The connecting element is resilient and may be flexed between collapsed and expanded orientations and is positioned within the hole, with the overhang surface overlying one of the engagement surface and engagement edge. The spoke is connected to the connecting element by a threaded engagement with the central opening.

A formwork for constructing an arched structure comprises a first end panel and a second end panel. A plurality of longitudinal members extends between the first end panel and the second end panel. The longitudinal members are arranged in an arced formation and the longitudinal members slope between the first end panel and the second end panel. The formwork may have rollers disposed along lengths of the longitudinal members.

A vehicle wheel, comprising a rim, a hub, a plurality of spokes extending between the rim and hub, a bracing element including a hole with a central axis, a sidewall, a longitudinally inward entrance, and at least one of an engagement surface and an engagement edge outward of the entrance, a connecting element connected to the bracing element, including an opening extending along an opening axis, and a multiplicity of prongs, with at least one of the prongs including a lateral overhang surface. The connecting element is resilient and may be flexed between collapsed and expanded orientations and is positioned within the hole, with the overhang surface overlying one of the engagement surface and engagement edge in a first overlie engagement. The spoke includes a laterally projecting surface to overlie the connecting element in a second overlie engagement that is preferably located longitudinally outwardly of the first overlie engagement.

A multi-functional, space-saving, and economical furniture item, made of wood, that converts shape and function to provide storage, seating, a desk-top workspace, and a countertop-height workspace. The furniture item is a bench that provides seating and has a flap that can be “actioned” (folded down) to provide a table for writing. The bench is integrally formed in a unitary structure that affords multimodal transformation and practicality for ease-of-use and desired functional range. By lifting the bench seat clockwise and lowering the backrest, the furniture item transforms into a countertop or a desktop workspace. Undoing the said steps transforms the countertop back to the bench.

The invention provides a lateral displacement resisting horizontal supporting structure for a post-cast strip of a super high-rise underground wall. The lateral displacement resisting horizontal supporting structure comprises an outer wall, frame columns and a top plate installed on the outer wall and the frame columns. The structure further comprises a post-cast strip and a supporting structure installed on the post-cast strip, the supporting structure comprises a mother plate, an inserting plate and a locking piece, an inserting groove is formed in the mother plate, the inserting plate partially extends into the inserting groove and is locked through the locking piece, and the supporting structure tightly abuts against the two sides of the post-cast strip. According to the scheme, the inserting groove is formed in the mother plate, the mother plate and the inserting plate are placed into the post-cast strip after the inserting plate is inserted into the mother plate, then the inserting plate and the mother plate are locked through the locking piece, the inserting structure abuts against the two sides of the post-cast strip to provide a supporting effect, and equivalently, horizontal supporting force is provided; the effect of preventing the outer wall from moving inwards and even collapsing can be achieved. The lateral displacement resisting horizontal supporting structure for the post-cast strip of the super high-rise underground wall has the advantage of being capable of preventing an outer wall from moving inwards and even collapsing.

An implant able to be inserted into a surgically prepared joint space includes a body having a central cavity extending longitudinally through the body and at least one movable barb, and a cap for location within the central cavity at an end of the body. The location of the cap within the central cavity of the body causes outward movement of the barb.