摘要:
An abrasion resistant tubular article comprising poly(4-methyl-1-pentene) having high frictional efficiency over wide temperature and load conditions. The article of the present invention is particularly well adapted for use in motion transmitting cable assemblies and the like.
摘要:
An improved conduit for transporting fuel and/or fuel vapor or a motion transmitting member in an automobile comprising an inner tube comprised of fluorocarbon polymeric material and having an inner surface for contacting and containing fluids or a motion transmitting member, and a chemically etched outer surface having a substantial portion of the fluorine of the fluorocarbon polymer substituted by a polar moiety. The conduit further includes an outer tube comprising an inner surface comprised of polymeric material containing sufficient polar groups such that hydrogen bonding at the interface between the outer surface of the inner tube and the inner surface of the outer tube prevents substantial relative separation of or movement between the inner and outer tubes.
摘要:
Disclosed is an automotive fuel conduit which comprise an inner tube, an outer tube substantially surrounding the inner tube and mechanical locking structure at the interface between the outer surface of the inner tube and the inner surface of the outer tube for preventing substantial relative movement between the inner and outer tubes. The mechanical locking structure preferably comprises a plurality of mating projections and indentations on the inner surface of the outer tube and the outer surface of the inner tube, such as grooves, cuts and ridges. The inner and outer tubes are preferably each formed of polymeric material and each contain both projections and indentations. Methods are also disclosed which comprise providing a first polymeric tubular product having projections and/or indentations in at least a portion of the external surface thereof and melt extruding over said first tubular product a second polymeric tubular product such that the polymeric material of said second tubular product flows into said indentations and/or around said projections during the extrusion process.
摘要:
An improved conduit for transporting fuel and/or fuel vapor or a motion transmitting member in an automobile comprising an inner tube comprised of fluorocarbon polymeric material and having an inner surface for contacting and containing fluids or a motion transmitting member, and a chemically etched outer surface having a substantial portion of the fluorine of the fluorocarbon polymer substituted by a polar moiety. The conduit further includes an outer tube comprising an inner surface comprised of polymeric material containing sufficient polar groups such that hydrogen bonding at the interface between the outer surface of the inner tube and the inner surface of the outer tube prevents substantial relative separation of or movement between the inner and outer tubes.
摘要:
Disclosed is an oxygen sensor and lead wire therefor. The lead wire has a first end contained within the oxygen sensor and a second end outside the oxygen sensor, the lead wire comprising an electrically insulating wall portion having passage means for providing enhanced fluid communication between the interior of the sensor and the exterior thereof. According to preferred embodiments, such passage means comprises a bore or a passageway in the insulating wall portion.
摘要:
This invention relates generally to cable assemblies, and more particularly to flexible cable assemblies of the type used in automobiles for transmitting rotary or linear motion along a predetermined path. In a particular aspect, the present invention relates to abrasion-resistant fluorocarbon polymer composites, such as polytetrafluoroethylene (“PTFE”) composites, having an unexpectedly high frictional efficiency under high load conditions and after long cycle times. The present invention relates to abrasion-resistant, anti-friction tubing formed from such composites, and to uses of such tubing as a liner for flexible, motion transmitting cable assemblies.
摘要:
A method and apparatus for pressure welding together novel aluminum or magnesium workpieces. Edges of workpieces to be pressure welded together are aligned with each other by abutment and one workpiece retracted from the other a predetermined distance to define an open channel between the edges. The workpiece edges are quickly heated to a temperature within the range of from about 200.degree. to 900.degree. F. by passing a uniform flow of heating gases through the channel such that the edge tip and sides of each workpiece are softened while the edge inner cores remain cooler and harder with their mechanical properties unaffected by the heat and the workpieces then moved into abutment with each other to close the channel and immediately pressed together under high pressure for expulsion of softened metal containing deleterious materials such as surface oxides and creation of a solid-phase weld bond between the relatively cool and hard inner cores. An air curtain can be provided to improve control of the heating of the workpieces and to enhance pressure welding together of workpieces of different gauges and of different metals, such as welding of aluminum to magnesium alloys.
摘要:
A lead wire for use with an oxygen sensor is disclosed. The wire is formed of a center strand having high tensile strength surrounded by a plurality of first strands having high electrical conductance and a plurality of second strands having high tensile strength. The first and second strands are surrounded by a plurality of third strands having high electrical conductance and arranged in groups, and a plurality of fourth strands having high tensile strength, each fourth strand being positioned between two groups of third strands. The second and fourth strands are spaced at equal separation angles around the center strand.
摘要:
A lead wire for use with an oxygen sensor is disclosed. The wire is formed of a center strand having high tensile strength surrounded by a first plurality of strands having high electrical conductance. Further pluralities of strands having high tensile strength or high electrical conductance surround the center strand and the first plurality of strands.
摘要:
An abrasion-resistant multi-wall tubular article and a method of making same. The tubular article comprises an inner wall of polytetrafluoroethylene and an organic filler, an outer wall comprising polytetrafluoroethylene and an inorganic filler and a layer of polytetrafluoroethylene disposed therebetween. The article of the present invention has a high internal frictional efficiency over wide temperature and load conditions as well as an enhanced external crush and creep resistance and is particularly well adapted for use in motion transmitting cable assemblies and the like.