31results about How to "Maintain roundness" patented technology

The invention relates to a pipette tip mounting shaft configuration and a disposable pipette tip having a matching configuration. The mounting shaft includes a locking section located above a lower sealing section. The locking section has outwardly extending locking lobes circumferentially spaced around the mounting shaft and located above a stop member that separates the lower sealing section from the upper locking section. When the mounting shaft is fully inserted into the collar of the mating disposable pipette tip, the tip locks onto the mounting shaft. The bore of the pipette tip includes a circumferential shelf separating its upper collar from the tip sealing area which is located below the circumferential shelf. The locking lobes gently flexes and distorts the pipette tip collar out of round as the mounting shaft is inserted in the pipette tip, rather than stretching the tip collar. The circumferential shelf on the pipette tip between the tip collar and the barrel isolates the sealing area at the upper end of the barrel from distortion, thus facilitating reliable sealing engagement.

In one aspect, the invention relates to a pipette tip mounting shaft configuration and a disposable pipette tip having a matching configuration. The mounting shaft includes a locking section located above a lower sealing section. The locking section has outwardly extending locking lobes located above a stop member and a lower sealing section located below the stop member. In certain embodiments, the diameter of the mounting shaft below the stop member is reduced in order to lessen insertion and ejection forces, which is particularly helpful for hand-held multi-channel pipettors. In these embodiments, the lower sealing section contains either a frustoconical sealing section, or an annular groove and a sealing ring, such as a flouroelastomeric O-ring seal. When the mounting shaft is fully inserted into the collar of the mating disposable pipette tip, the tip locks onto the mounting shaft. The bore of the pipette tip includes a circumferential shelf or shoulder separating its upper collar from the tip sealing area which is located below the circumferential shelf. The tip collar preferably includes a locking ring located at or near the upper opening for the mounting shaft. The dimensions of the collar, and in particular the distance between its circumferential shelf and the locking ring, are selected to match the dimensions of the mounting shaft between the stop member and the upper end of the locking lobes, thus locking the pipette tip in a secure, reliable position and orientation while using ergonomic insertion and ejection forces. The locking lobes preferably include a ramp portion that gently flexes and distorts the pipette tip collar out of round as the mounting shaft is inserted in the pipette tip, rather than stretching the tip collar. The circumferential shelf on the pipette tip between the tip collar and the barrel isolates the sealing area at the upper end of the barrel from distortion, thus facilitating reliable sealing engagement between the lower sealing section of the mounting shaft and the sealing ring in the upper end of the barrel of the pipette tip.

A filler and a multicore cable includes a plurality of core portions, which includes a conductor, and a protective layer that surrounds the core portions, the filler being provided between the core portions and the protective layer of the multicore cable, the filler being characterized by including: frame portions including a first frame portion and a second frame portion, which are rotated by predetermined angles towards both sides about the center portion thereof and then incised; and a support portion provided between the frame portions so as to connect the frame portions to each other.

A magneto-rheological polishing liquid circulation device that can stabilize the performance of the polishing liquid for a long time. Its liquid mixing tank is connected to the water tank through a metering pump, and the cooler is connected to the liquid mixing tank through a cooling pipeline; The liquid mixing tank, electromagnetic flowmeter, nozzle, recovery device and recovery pump form a polishing liquid circulation loop, and the liquid mixing tank and electromagnetic flowmeter connected in sequence through the non-polishing circulation pipeline form a non-polishing circulation loop, and the polishing liquid circulation loop and the non-polishing The circulation loop is connected in parallel and a switching control valve is provided at the parallel connection of the two. A helical coil is wound outside a section of pipeline between the liquid mixing tank and the switching control valve; the electromagnetic flowmeter and the helical coil are connected to the input end of the computer, and its control The output ends are respectively connected with the switching control valve, the cooling machine, the power pump and the metering pump. The invention has the advantages of high control precision, good stability, etc., and can provide cheap, reliable and stable magnetorheological polishing liquid for magnetorheological polishing processing for a long time.

Even when a radial length of a swing arm is increased, no gap is generated between adjacent segments, and tires of various sizes can be handled while roundness of a drum is maintained. An expandable molding drum has a plurality of segments constituting a circumferential surface, the molding drum having a plurality of swing arms having one end portion swingably connected to an outer circumferential surface of a cylindrical slider externally fitted with a drum shaft and having the other end portion swingably connected to the segment and expanding / contracting the segment along with movement of the slider in a drum shaft direction, and adjacent end portions of one end portions of the swing arms being swingably connected to the outer circumferential surface of the slider at intervals from each other in the drum shaft direction.

A powder recycling system includes a supply tank, a continuous loss-in-weight module, a pneumatic module, a transfer channel, a recycle module, and a refilling tank. The supply tank accommodates recycling powder. The continuous loss-in-weight module includes a storage tank receiving the recycling powder from the supply tank and a rotary output pipe connected to the storage tank to output the recycling powder. The continuous loss-in-weight module controls the mass flow rate of the output of the recycling powder according to the weight change of the storage tank. The pneumatic module enables the recycling powder to float and move in the transfer channel. The recycle module is connected to the transfer channel to receive the recycling powder, sieves the recycling powder, provides virgin powder, and mixes the virgin powder with the recycling powder. The refilling tank is connected to the recycle module to receive the recycling powder and the virgin powder.

Groove holes capable of positioning each of the segment cores with respect to a winding jig in an arc attitude with wide gaps between the teeth edges of respective pole teeth are respectively formed in yoke parts positioned at both end parts of each of the segment cores in a longitudinal direction.

The invention discloses a high-tensile signal transmission reel cable, which comprises a cable body, the cable body contains soft steel wires, a copper wire braid layer and an insulating layer, the copper wire braid layer is provided with soft steel wires, and the copper wire braid The outer surface of the inner layer is covered with an insulating layer, and the outer surface of the cable body is covered with an inner lining layer, and hemp rope is filled between the inner lining layer and the cable body, and the outer side of the inner lining layer is wrapped with a shielding layer, so The inside of the shielding layer is provided with a drain wire, the outer surface of the shielding layer is covered with an outer protective cover, and the outer surface of the outer protective cover is provided with a steel wire braided layer; the insulating layer is made of a highly flexible flame-retardant PVC insulating material, On the premise of ensuring the excellent electrical insulation performance of the cable, the heat resistance, flexibility, flame retardancy and mechanical properties of the cable are guaranteed; the cable in the present invention has good flexibility, tensile resistance and mechanical properties, and can withstand large tensile forces and bend.

A low profile water bath co-extrusion process for sausage manufacturing is disclosed, along with machines for accomplishing this process. The process is an automated assembly line which begins with co-extruded food product, such as a sausage emulsion coated with collagen and finishes with cooked, boxed, packaged link sausage. The process includes the steps of co-extrusion, linking and cutting the co-extruded food product to individual links. Following these steps and prior to a liquid smoking step, the casing is prepared by steps which includes chemical treatment of the individual links in a water bath, while dehydrating the product in a salt solution, the water bath being a two-part process and following the water bath using a forced hot air drying step. Machines disclosed include a modification of prior art screw driven water bath and a novel roller / conveyor forced hot air drying assembly that subjects individual links of a co-extruded food product to a rolling motion while simultaneously being transported horizontally and being subject to forced hot air drying.

Even when a radial length of a swing arm is increased, no gap is generated between adjacent segments, and tires of various sizes can be handled while roundness of a drum is maintained. An expandable molding drum has a plurality of segments constituting a circumferential surface, the molding drum having a plurality of swing arms having one end portion swingably connected to an outer circumferential surface of a cylindrical slider externally fitted with a drum shaft and having the other end portion swingably connected to the segment and expanding / contracting the segment along with movement of the slider in a drum shaft direction, and adjacent end portions of one end portions of the swing arms being swingably connected to the outer circumferential surface of the slider at intervals from each other in the drum shaft direction.

The utility model provides an imaging lens, which is provided with an optical axis and comprises a plastic lens cone and an imaging lens group. Plastic lens barrel surrounding optical axis. The plastic lens barrel includes an object-side surface, an image-side surface, an inner peripheral portion, and an outer peripheral portion. The object-side surface and the image-side surface are disposed opposite to each other and are substantially perpendicular to the optical axis. The inner peripheral portion and the outer peripheral portion connect the object side surface and the image side surface, and the outer peripheral portion is farther from the optical axis than the inner peripheral portion. The inner peripheral part is provided with a parallel inner edge surface, and the outer peripheral part is provided with a first outer peripheral surface and an injection mark. The imaging lens group is arranged in the plastic lens barrel. The imaging lens group includes a plurality of imaging lens elements. The outer diameter of at least one imaging lens element is larger than [pi]2 mm. The outer edge of at least one imaging lens element is in solid contact with the parallel inner edge surface of the inner peripheral part. The first outer peripheral surface, the material injection mark and the parallel inner edge surface are sequentially arranged from the object side to the image side. The first outer peripheral surface tapers toward the object-side surface. The present invention also provides a camera module with the imaging lens and an electronic device with the camera module.

The utility model relates to an unreeling device in a copper tube, which comprises a bottom wheel supporting rack (1), a horn mould (2), a connecting plate (3), a wire passing mould (4), an upper guide wheel (5), a lower guide wheel (6) and a base (7). The connecting plate (3) is disposed between the horn mould (2) and the wire passing mould (4). A flange guide structure on the head in the coppertube is employed in the unreeling device, so that floor area is reduced, and two wire plates can be placed at the same time; and a connector can be made in advance, so that a break will not be causedin the process of replacing the wire plates, and continuous production is ensured, thereby improving working efficiency of the whole production line. The unreeling device is simple in manufacturing process, low in cost, high in production efficiency and more reliable in quality of product.

A compressor comprising a sealed chamber delimited laterally by a shell, a drive shaft housed in the shell and guided relative to the other parts of the compressor via at least one bearing provided in a bearing support fixed to the internal wall of the shell. The method comprises steps consisting in supplying a shell have, in the fixing plane of the bearing support, an oval section comprising a small axis to which the bearing support is intended to be mounted, exerting a pressure on the shell in order to elastically deform it so as to increase the length of its small axis, inserting and positioning the bearing support in the fixing plane of the latter, and ceasing to exert a pressure on the shell so that the latter tends to elastically return to its original form and grip the bearing support.

The present invention provides a method for induction hardening of a steel member having an outer ring portion and, more specifically, for induction hardening of an outer circumferential surface of the outer ring portion. The method uses two pressing members, each of which includes a flat basal surface and a projecting portion projecting therefrom. Each of the projecting portions has a cross-section in the shape of a perfect circle. Also, the projecting portions have, on the outer circumferences thereof, respective pressing surfaces. While gaps are maintained between axial end faces of the outer ring portion and the basal surfaces of the pressing members, the pressing members are pressed against the outer ring portion so that the pressing surfaces each abut against the inner circumference side of the outer ring portion. While a biasing force is applied to the pressing members, the induction hardening process is applied to the outer circumferential surface. During the induction hardening process, the pressing members are moved toward each other until the basal surfaces abut against respective axial end faces of the outer ring portion.

A chain tensioner includes a cylinder having a closed end, an internally threaded plunger axially slidable in the cylinder, a return spring biasing the plunger in the protruding direction from the cylinder, and a screw rod having an external thread in threaded engagement with the internal thread of the plunger. The portion of the screw rod protruding from the plunger abuts a rod seat provided in the cylinder. The screw rod has a rolled external thread and an intermediate portion protruding from the plunger and having an outer diameter smaller than the diameter of the root of the external thread. The screw rod has a forged contact surface, to be contacted with the rod seat, on the axial end face of the intermediate portion. The internal thread may be formed by pressing, and a pressed recess, corresponding to the internal thread, may be formed on the plunger's outer circumference.