Energy dissipative tubes

• US 9,445,486 B2
• Filed: 12/16/2015
• Issued: 09/13/2016
• Est. Priority Date: 08/21/2009
• Status: Active Grant

• Current Assignee: Titeflex Corporation (Smiths Group International Holdings Ltd.)
• Original Assignee: Titeflex Corporation (Smiths Group International Holdings Ltd.)
• Inventors: Duquette, Scott, Coppola, Brian
• Primary Examiner(s): Brinson, Patrick F
• Application Number:
  US14/971,278
• Publication Number:
  US 20160105944A1
• Time in Patent Office: 272 Days
• Field of Search: 138/121, 138/138, 138/139, 138/141, 138/137, 138/140, 428/35.9, 428/36.9
• US Class Current: 1/1
• CPC Class Codes: B23P 19/02 for connecting objects by press fit or for detaching same B23P19/10 takes precedence
• CPC Class Codes: B23P 19/08 Machines for placing washers, circlips, or the like on bolts or other members
• CPC Class Codes: F16L 19/041 the ring being an insert F16L19/043 takes precedence
• CPC Class Codes: F16L 9/147 comprising only layers of metal and plastics with or without reinforcement
• CPC Class Codes: H02G 3/0468 Corrugated
• CPC Class Codes: H02G 3/0481 with a circular cross-section H02G3/0468, H02G3/0475 take precedence
• CPC Class Codes: H05F 3/00 Carrying-off electrostatic charges from shoes A43B7/36; from living beings A61N1/14; from tyres B60C19/08; from vehicles B60R16/06; from aircraft B64D45/02; from large containers B65D90/46
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing
• CPC Class Codes: Y10T 29/49124 On flat or curved insulated base, e.g., printed circuit, etc.
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

One aspect of the invention provides an energy dissipative tube including: a length of corrugated stainless steel tubing; a conductive resin layer adjacent to the outside of the tubing; and an insulative resin layer adjacent to the conductive layer. Another aspect of the invention provides an energy dissipative tube consisting of: a length of corrugated stainless steel tubing; a conductive thermoplastic polymer layer adjacent to the outside of the tubing, the conductive thermoplastic polymer layer having a volume resistivity of less than about 10⁶ ohm-cm; and an insulative resin layer adjacent to the conductive layer.

Claims

1. An energy dissipative tube consisting essentially of:

a length of corrugated stainless steel tubing;

a conductive resin layer adjacent to the outside of the tubing; and

an insulative resin layer adjacent to the conductive layer without a metallic layer interposed between the conductive resin layer and the insulative resin layer.

2. The energy dissipative tube of claim 1, wherein the conductive resin has a volume resistivity of less than about 10⁶ ohm-cm.

3. The energy dissipative tube of claim 1, wherein the conductive resin layer has a thickness between about 0.015″

and about 0.035″

.

4. The energy dissipative tube of claim 1, wherein the insulative resin layer has a thickness between about 0.015″

and about 0.035″

.

5. The energy dissipative tube of claim 1, wherein the conductive resin layer is a resin impregnated with a conductive material.

6. The energy dissipative tube of claim 1, wherein the conductive material is metallic particles.

7. The energy dissipative tube of claim 6, wherein the metallic particles are copper particles.

8. The energy dissipative tube of claim 6, wherein the metallic particles are aluminum particles.

9. The energy dissipative tube of claim 6, wherein the metallic particles are gold particles.

10. The energy dissipative tube of claim 6, wherein the metallic particles are silver particles.

11. The energy dissipative tube of claim 6, wherein the metallic particles are nickel particles.

12. The energy dissipative tube of claim 1, wherein the conductive material is carbon black.

13. The energy dissipative tube of claim 1, wherein the conductive material is carbon fibers.

14. The energy dissipative tube of claim 1, wherein the conductive resin is a thermoplastic polymer.

15. The energy dissipative tube of claim 1, wherein the insulative resin is a thermoplastic polymer.

16. An energy dissipative tube consisting essentially of:

a length of corrugated stainless steel tubing;

a conductive thermoplastic polymer layer adjacent to the outside of the tubing, the conductive thermoplastic polymer layer having a volume resistivity of less than about 10⁶ ohm-cm; and

an insulative resin layer adjacent to the conductive layer without a metallic layer interposed between the conductive resin layer and the insulative resin layer.

17. The energy dissipative tube of claim 16, wherein the conductive thermoplastic polymer layer is impregnated with carbon black.

18. An energy dissipative tube comprising:

a length of corrugated stainless steel tubing;

a conductive resin layer adjacent to the outside of the tubing; and

an insulative resin layer directly adjacent to the conductive layer.

19. The energy dissipative tube of claim 18, wherein the conductive resin layer is directly adjacent to the outside of the tubing.