821 results about "Back-up ring" patented technology

A drillable bridge plug includes a mandrel having external splines disposed on an outer surface of the mandrel, a sealing element disposed around the mandrel, an upper cone disposed around the mandrel proximate an upper end of the sealing element, and a lower cone disposed around the mandrel proximate the lower end of the sealing element, wherein an inner surface of the lower cone comprises internal splines configured to engage the external splines. The drillable bridge plug also includes an upper and a lower slip assembly disposed around the mandrel, and an upper and lower ring assembly each including a first segmented barrier ring, a second segmented barrier ring, and a back-up ring disposed proximate sealing element. A method of setting the drillable bridge plug and a method of removing the drillable bridge plug are disclosed.

An expandable backup ring includes an outer surface, an inner surface having a plurality of protrusions projecting radially inwardly, and a plurality of segments, the segments defined by a plurality of outer surface cuts. The plurality of outer surface cuts extends radially inwardly from the outer surface and partially into each of the plurality of protrusions.

A downhole plug is provided. In one or more embodiments, the plug includes a body and an element system disposed about the body. The plug further includes a first and second back-up ring member having two or more tapered wedges. The tapered wedges are at least partially separated by two or more converging grooves. First and second cones are disposed adjacent the first and second back-up ring members.

The invention discloses a circumferential drilling hole positioning device for a round workpiece. The circumferential drilling hole positioning device comprises a bottom plate, a positioning mechanism, a turntable, a bearing, a pressing mechanism and a support ring, wherein the bearing is arranged in a round groove of the bottom plate in a clamping way, the turntable is annularly clamped and arranged in the bearing, the pressing mechanism is arranged on the turntable, the support ring is arranged under the turntable, the positioning mechanism is arranged on the bottom plate, and the front end of a positioning rod of the positioning mechanism is in butt joint with equant V-shaped notches formed in the outer edge of the turntable. The circumferential drilling hole positioning device has the advantages that a drilling hole can be positioned through directly selecting the V-shaped notch corresponding to a bisectrix marked on the turntable, the line drawing or template manufacturing is not needed, the work efficiency is high, the processing cost is reduced, the universality is good, and the product processing precision is high.

Embodiments of the disclosure generally relate to a support ring that supports a substrate in a process chamber. In one embodiment, the support ring comprises an inner ring, an outer ring connecting to an outer perimeter of the inner ring through a flat portion, an edge lip extending radially inwardly from an inner perimeter of the inner ring to form a supporting ledge, and a substrate support extending upwardly from a top surface of the edge lip. The substrate support may be a continuous ring-shaped body disposed around a circumference of the edge lip. The substrate support supports a substrate about its entire periphery from the back side with minimized contact surface to thermally disconnect the substrate from the edge lip. Particularly, the substrate support provides a substantial line contact with the back surface of the substrate.

A spool type differential pressure transmitter support and valving manifold having a manifold body defining a process face and a transmitter face and having a generally cylindrical internal surface defining an open ended spool chamber and having signal inlet and outlet passages intersecting the process and transmitter faces and being in communication with the spool chamber. The manifold body also defines a vent passage which is in communication with said spool chamber. A spool member is positioned for rotation to "run", "zero" and "off" positions within the spool chamber, has ends extending from the open ends of the spool chamber and has a pair of transversely oriented body passages positioned for selective registry with the signal inlet and outlet passages at the "run" position of the spool member. Circumferential seals each preferably comprising an O-ring and a back-up ring establish sealing between the spool member and the manifold body and serve to isolate the signal passages from one another and to prevent leakage of signal pressure at the open ends of the spool chamber. A plurality of mode seal elements are carried by the outer periphery of the spool member and provide for manifold mode selection to the "run", "zero" and "off" positions responsive to rotational positioning of said spool member relative to said manifold body to permit calibration of the differential pressure transmitter with the pressurized process in operation.

The invention discloses a communication cable winding and protecting device and a use method. The communication cable winding and protecting device comprises a base plate. A first vertical plate is fixedly connected with the right side of the top of the base plate. A second vertical plate is fixedly connected to the left side of the top of the base plate. First electric telescopic rods are fixedlyconnected to the two sides of the top of the base plate. A support ring is fixedly connected to the tops of the first electric telescopic rods. A first motor is fixedly connected to the right side ofthe first vertical plate, and the left end of a rotating shaft of the first motor penetrates to the left side of the first vertical plate and is fixedly connected to a first circular plate . The communication cable winding and protecting device has the advantages of lifting a cable reel, enabling replacement to be easy and evenly winding the communication cable. The communication cable winding and protecting device solves the problems that an existing communication cable winding device has a single function, cannot lift and replace the reel, needs people to manually lift the reel and wastes time and effort, the communication cable is prone to being piled up at one place in the winding process, and then the communication cable is unevenly wound, which goes against storage of the communication cable.

A back-up ring for use in a sealing assembly having an annular body with a first face and a second face and defining an axial thickness, the first face being adapted to be engaged by an annular seal ring, a first cut in the first face extending axially inwardly from the first face at an angle of less than 90° but greater than 0° to the first face, a second cut in the second face, the second cut being interconnected to the first cut and being at an angle thereto, the angle of at least a portion of the second cut being 90° or greater but less than 180° to the second face.

Disclosed herein is a hydraulic master cylinder body having a bore defined at least in part by a bore wall, wherein the bore wall includes an opening for hydraulic fluid to be passed into the bore, and a piston assembly situated at least substantially in the bore, the assembly having a piston with a piston body and at least one cup seal situated substantially around the piston body, the cup seal situated adjacent to the bore wall so as to be in sealing engagement therewith, and a back-up ring that is situated about the piston body, wherein the back-up ring is positioned to at least partially cover a portion of the cup seal that is adjacent to the bore wall and to prevent at least a portion of the cup seal from contacting the bore wall and the opening for hydraulic fluid during piston actuation.

A simplified vane mounting arrangement by which a vane ring can be pre-assembled to an inner support ring before being installed in an outer casing.

A bi-directional seal assembly can be used in various types of cartridge valves including dirty fluid valves and a variety of other valves. The present seal assembly utilizes a seal spool, two O-rings and opposing seal cups. Back-up rings are provided to engage the O-rings to control deformation of the O-rings. The O-rings are compressed during manufacture of the seal assembly and the valve more than typically recommended by O-ring manufacturers. Because of this compression, the O-rings serve a dual function. At lower pressures, the O-rings act as a spring causing the seal cups to contact the opposing seal plates and at higher pressures they act as seals between the seal assembly and the valve.

A back-up ring is disclosed wherein the ring is a knitted mesh section substantially surrounded by an outer coating covering substantially all of the knitted wire mesh section, the coating having contact with the outer and inner surface of an annulus.

The invention discloses a center shaft for a bridge plug, a bridge plug and seat sealing for the bridge plug and relates to the technical field of engineering machinery. A technical problem that bridge plugs with large internal drift diameter cannot be made of degradable plastics and degradable metal material in the prior art can be solved. The center shaft for the bridge plug comprises a seat sealing dabber and a seat sealing pipe shaft, wherein the seat sealing pipe shaft is formed by an extrusion shoulder and a bearing trunk; the extrusion shoulder extrude a press ring of the bridge plug or a reducing supporting ring of the bridge plug; after a connection between the seat sealing dabber and a downstream end supporting body is removed, the seat sealing dabber can be extracted out of the center hole of the seat sealing dabber, so the center hole of the seat sealing dabber can form an internal fluid channel for the bridge plug; the strength of the material of the seat sealing dabber is greater than the strength of degradable material or corrosive material; and the material of the seat sealing dabber is degradable or corrosive material. The bridge plug comprises the center shaft for the bridge plug. Internal drift diameter of the bridge plug can be expanded; sealing effect of the bridge plug can be enhanced; and anchoring performance and construction convenience can be improved.

The invention relates to a radially and axially integrated sliding bearing. The sliding bearing comprises a bearing pedestal, a bearing shell, an oil inlet port, a circumferential oil inlet groove, a thrust bearing oil inlet port, a thrust bearing shell, a radial bearing shell, a radial bearing oil inlet port, a bearing shoulder, a rotating shaft, a back-up ring and an oil outlet port. When the bearing is running, lubricating oil is injected into the circumferential oil inlet groove of the bearing shell through the oil inlet port; then part of the lubricating oil enters into a gap between the rotating shaft and the radial bearing shell through the radial bearing oil inlet port, and an oil membrane is formed as the rotating shaft rotates, and the oil membrane is used for bearing radial load; meanwhile, another part of the lubricating oil enters into a gap among the thrust bearing shell, the bearing shoulder and the back-up ring through the thrust bearing oil inlet port, and an oil membrane is formed as the bearing shell and the back-up ring rotate, and the oil membrane is used for bearing bidirectional axial load. The radially and axially integrated sliding bearing is capable of bearing both radial load and bidirectional axial load.

The invention relates to a traction motor and specifically relates to a traction motor capable of online replacement of a bearing, for solving the problem of incapability of online replacement of a bearing by use of a conventional locomotive traction motor. The traction motor comprises a support, a non-driving end cover, a rotor, the bearing, a bearing back-up ring and a bearing angular ring, and further comprises a sealing cover, a bearing pedestal and a spindle nose cover plate, wherein the bearing is in interference fit with a bearing hole of a bearing pedestal, the bearing pedestal is in transition fit with the non-driving end cover, and the bearing angular ring is in interference fit with a rotor shaft; the bearing back-up ring is in contact with an outer ring of the bearing and is fixed to the bearing pedestal by use of a bolt, and the spindle nose cover plate is fixed to the end surface of the rotor shaft; the sealing cover and the end cover are in interference fit and are fixed by use of a bolt; and the sealing cover, the spindle nose cover plate, the bearing back-up ring and the bearing pedestal are provided with screw holes. According to the invention, the function of online replacement of the bearing without unloading can be realized, the maintenance time and the maintenance cost of a fault locomotive traction motor are greatly reduced, and the punctuality rate and the utilization rate of locomotive operation are improved.

A seal for acceptance in an annular gland in a piston comprises an annular primary sealing element, an annular secondary sealing element disposed radially inwardly of the primary sealing element, and a pair of axially spaced back up rings disposed in axially spaced relation on opposite sides of the primary sealing element and having radially inner portions, respectively, engaged with the primary sealing element so as to lock the backup rings in the gland of the piston.

The invention discloses a steel tube end seal ring and a sealing device, and belongs to the technical field of sealing equipment. The steel tube end seal ring comprises a seal ring body and a supporting block arranged in an annular groove, and a steel tube seal peripheral edge and an end face seal peripheral edge are arranged on the end face of the seal ring body; an arc-shaped supporting groove is formed in the end face of one side of the seal ring body; a convex ring provided with a through groove is arranged on the outer circumferential face of the seal ring body. The sealing device comprises a sealing head and a locating sleeve which are mutually matched, and the steel tube end seal ring is arranged in the sealing device. A supporting ring of the locating sleeve is arranged in a supporting groove of the sealing head in a jacking mode and a gap is reserved. The steel tube end seal ring and the sealing device have the advantages that the pre-sealing link is omitted, the efficiency is improved, and cost is saved; the problem that the seal ring droops is solved, so that a pressure testing head can be designed smaller, and therefore a high-pressure test can be conducted on steel tubes with the diameter phi being larger than six hundred and thirty millimeters; the gap between the supporting groove and the supporting ring guarantees the effect that the seal ring body can be moved in place during pressure exertion, and after pressure is removed, the seal ring body can recover the original shape.