초록 ▼

A pivot flow joint for high-pressure fluid-flow devices of the type including a rotating flow member connected to a non-rotating flow member. The pivot flow joint includes first and second axially-aligned seal bushings secured to the non-rotating and rotating flow members, respectively, the first an

A pivot flow joint for high-pressure fluid-flow devices of the type including a rotating flow member connected to a non-rotating flow member. The pivot flow joint includes first and second axially-aligned seal bushings secured to the non-rotating and rotating flow members, respectively, the first and second seal bushings having opposed adjoining contact surfaces. The seal bushings are biased toward one another for sealing engagement at such contact surfaces. Certain preferred embodiments involve spring-biasing the seal bushings toward one another and/or use of the high-pressure fluid to exert axial pressure for that purpose. The two seal bushings, which are preferably ceramic and of identical size and shape, carry out the sealing function of the pivot flow joint in the transition between the non-rotating and the rotating members of such joint.

대표청구항 ▼

A pivot flow joint for high-pressure fluid-flow devices of the type including a rotating flow member connected to a non-rotating flow member. The pivot flow joint includes first and second axially-aligned seal bushings secured to the non-rotating and rotating flow members, respectively, the first an

A pivot flow joint for high-pressure fluid-flow devices of the type including a rotating flow member connected to a non-rotating flow member. The pivot flow joint includes first and second axially-aligned seal bushings secured to the non-rotating and rotating flow members, respectively, the first and second seal bushings having opposed adjoining contact surfaces. The seal bushings are biased toward one another for sealing engagement at such contact surfaces. Certain preferred embodiments involve spring-biasing the seal bushings toward one another and/or use of the high-pressure fluid to exert axial pressure for that purpose. The two seal bushings, which are preferably ceramic and of identical size and shape, carry out the sealing function of the pivot flow joint in the transition between the non-rotating and the rotating members of such joint. e second shell end in a plane generally transverse to the longitudinal axis. 7. The fuel injector according to claim 1, wherein the second connection is a radial connection. 8. The fuel injector according to claim 1, wherein the filter assembly comprises an adjusting tube and a filter disposed within the adjusting tube. 9. The fuel injector according to claim 8, wherein the filter is conical with respect to the longitudinal axis. 10. The fuel injector according to claim 8, wherein the filter has a cup shape and has an open first filter end and a closed second filter end. 11. A fuel injector for use with an internal combustion engine, the fuel injector comprising: a valve group subassembly including: a tube assembly having a longitudinal axis extending between a first end and a second end, the tube assembly including: an inlet tube having a first inlet tube end and a second inlet tube end; a non-magnetic shell having a first shell end connected to the second inlet tube end at a first connection and further having a second shell end; and a valve body having a first valve body end connected to the second shell end at a second connection and further having a second valve body end; a seat secured at the second end of the tube assembly, the seat defining an opening; an armature assembly disposed within the tube assembly; a lower armature guide disposed proximate the seat, the lower armature guide is adapted to magnetically decouple the seat and the armature; a member biasing the armature assembly toward the seat; a filter assembly located in the tube assembly, the filter assembly engaging the member and adjusting a biasing force of the member; and a first attaching portion; and a coil group subassembly including: a solenoid coil operable to displace the armature assembly with respect to the seat; and a second attaching portion fixedly connected to the first attaching portion. 12. A fuel injector for use with an internal combustion engine, the fuel injector comprising: a tube assembly having a longitudinal axis extending between a first end and a second end, the tube assembly including: an inlet tube having a first inlet tube end and a second inlet tube end; a non-magnetic shell having a first shell end connected to the second inlet tube end at a first connection and further having a second shell end; and a valve body having a first valve body end connected to the second shell end at a second connection and further having a second valve body end; a seat secured at the second end of the tube assembly, the seat defining an opening; an armature assembly disposed within the tube assembly, wherein the armature assembly further comprises an intermediate portion coupled between a magnetic portion and a sealing portion, the intermediate portion is adapted to magnetically decouple the magnetic portion and the sealing portion; a member biasing the armature assembly toward the seat; a filter assembly located in the tube assembly, the filter assembly engaging the member and adjusting a biasing force of the member; and a solenoid coil operable to displace the armature assembly with respect to the seat. 13. The fuel injector according to claim 12, wherein the inlet tube has a first inlet tube portion and a second inlet tube portion connected to the first inlet tube portion. 14. The fuel injector according to claim 12, wherein the non-magnetic shell includes a guide extending from the non-magnetic shell toward the longitudinal axis. 15. The fuel injector according to claim 12, wherein the filter assembly comprises an adjusting tube and a filter disposed within the adjusting tube. 16. The fuel injector according to claim 12, wherein the tube assembly is symmetric about the longitudinal axis. 17. The fuel injector according to claim 12, wherein the first valve body end engages the second shell end in a plane generally transverse to the longitudinal axis. 18. The fuel injector according to claim 12, wherein the s