827 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.

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.

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 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.

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.