Source: https://patents.google.com/patent/US8382518B2/en
Timestamp: 2019-03-25 04:09:57
Document Index: 83595173

Matched Legal Cases: ['§311', '§311', '§311', '§311', '§311', '§1', '§1']

US8382518B2 - Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force - Google Patents
US8382518B2
US8382518B2 US13/274,052 US201113274052A US8382518B2 US 8382518 B2 US8382518 B2 US 8382518B2 US 201113274052 A US201113274052 A US 201113274052A US 8382518 B2 US8382518 B2 US 8382518B2
US13/274,052
US20120031642A1 (en
2004-09-28 Priority to US10/952,294 priority Critical patent/US7411129B2/en
2005-05-03 Priority to US11/120,487 priority patent/US20060065430A1/en
2007-02-15 Priority to US11/675,441 priority patent/US7749024B2/en
2010-05-26 Priority to US12/787,877 priority patent/US8043119B2/en
2010-07-06 First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=46327301&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US8382518(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
2011-10-14 Priority to US13/274,052 priority patent/US8382518B2/en
2011-10-14 Application filed by Southwire Co filed Critical Southwire Co
2011-10-18 Assigned to SOUTHWIRE COMPANY reassignment SOUTHWIRE COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ARMSTRONG, JOHN, CHAMBERS, TERRY, KUMMER, RANDY D., LAM, HAI, REECE, DAVID, SASSE, PHILIP
2012-02-09 Publication of US20120031642A1 publication Critical patent/US20120031642A1/en
2013-02-26 Publication of US8382518B2 publication Critical patent/US8382518B2/en
2014-04-16 Assigned to SOUTHWIRE COMPANY, LLC reassignment SOUTHWIRE COMPANY, LLC CONVERSION Assignors: SOUTHWIRE COMPANY
2015-09-18 Priority claimed from US14/858,872 external-priority patent/US20160012945A1/en
This application is a continuation of application Ser. No. 12/787,877, filed May 26, 2010, now pending, which is a continuation of application Ser. No. 11/675,441, filed Feb. 15, 2007, now U.S. Pat. No. 7,749,024, issued Jul. 6, 2010, which is a continuation-in-part of application Ser. No. 11/120,487, filed May 3, 2005, now abandoned, which is a continuation-in-part of application Ser. No. 10/952,294, filed Sep. 28, 2004, now U.S. Pat. No. 7,411,129, issued Aug. 12, 2008. Each patent application identified above is incorporated here by reference in its entirety.
The overall setup used a pulling rope threaded through ˜40′ of PVC conduit (appropriately sized for the cable being pulled) with two 90° bends. Three 100′ pieces of THHN cable were cut and laid out parallel to one another in line with the first straight section of conduit, and the rope connected to them using industry-standard practice. The other end of the THHN cable was attached to a metal cable which was wrapped around a cylinder with an air brake to allow the application of constant back tension on the setup.
3. The improvement as defined by claim 1 in which the pulling lubricant is erucamide in a concentration, by weight, of between about 0.25% and 0.85%.
4. The improvement as defined by claim 1 in which the required installation pulling force is measured by a test apparatus and is less than the required installation pulling force to pull a power cable of the same type and size having only externally applied lubricant through said test apparatus, the test apparatus (i) constructed of a PVC conduit that is sized to accommodate said power cable and (ii) comprising a first conduit segment of about 10 feet separated from a second conduit segment of about 30 feet by two 90° bends, the second conduit segment separated from a third conduit segment of about 5 feet by a 90° bend, and the third conduit segment separated from a fourth conduit segment of about 10 feet by another 90° bend.
5. The improvement as defined by claim 4, wherein the externally applied lubricant is one of the following fluorinated oil, moly disulfide, and Y77.
6. The improvement as defined by claim 1, wherein the required installation pulling force is a quantifiable reduction of at least about 50% in comparison to the required installation pulling force of a non-lubricated cable of the same cable type and size through an arrangement of conduit, the arrangement of conduit being defined as PVC conduit that is sized to accommodate said cable having an initial 10 foot straight section of conduit, followed by a first 90° bend having a left-orientation, followed by a second 90° bend having a right-orientation, followed by a 30 foot straight section of conduit, followed by a third 90° bend having a right-orientation, followed by a 5 foot straight section of conduit, followed by a fourth 90° bend having a right-orientation, followed by a 10 foot straight section of conduit.
7. In a method for manufacturing a power cable of the type comprising a conductor and an extruded sheath surrounding at least said conductor, in which the sheath has at least its exterior portion formed of nylon material, the improvement in which a silicone based pulling lubricant is introduced in said material in connection with a process of extrusion of the sheath as one of the steps for the overall manufacture of the cable, which lubricant after such introduction permeates throughout at least said exterior portion of the sheath, thereby to become available at the exterior surface of said sheath to facilitate the installation of said cable to be pulled along an installation surface through building passageways in rafters or joists or conduit bends, the lubricant being in a concentration sufficient to reduce the required installation pulling force for installation of said cable through said building passageways.
8. The process as defined by claim 7 in which the silicone based pulling lubricant is high molecular weight silicone oil.
9. The process as defined by claim 8 in which the concentration, by weight, of the high molecular weight silicone oil is at least 9% by weight.
10. The process as defined by claim 7 in which the concentration, by weight, of the silicone based pulling lubricant is at least 9% by weight.
11. The improvement as defined by claim 7, wherein the required installation pulling force is quantifiably measureable by a test apparatus as less than the required installation pulling force to pull a power cable of the same type and size having only externally applied lubricant through said test apparatus, the test apparatus being defined as an initial 10 foot straight section of conduit, followed by a first 90° bend having a left-orientation, followed by a second 90° bend having a right-orientation, followed by a 30 foot straight section of conduit, followed by a third 90° bend having a right-orientation, followed by a 5 foot straight section of conduit, followed by a fourth 90° bend having a right-orientation, followed by a 10 foot straight section of conduit.
12. The improvement as defined by claim 7 in which the required installation pulling force is a quantifiable reduction of at least about 50% in comparison to the required installation pulling force of a non-lubricated cable of the same cable type and size through an arrangement of conduit, the arrangement of conduit (i) constructed of a PVC conduit that is sized to accommodate said power cable and (ii) comprising a first conduit segment of about 10 feet separated from a second conduit segment of about 30 feet by two 90° bends, the second conduit segment separated from a third conduit segment of about 5 feet by a 90° bend, and the third conduit segment separated from a fourth conduit segment of about 10 feet by another 90° bend.
13. The method as defined by claim 7 and the manner by which said lubricant is introduced in connection with the sheath extrusion process is by the lubricant having been combined with the nylon material to form lubricated nylon material pellets used for the extrusion of the sheath.
14. The method as defined by claim 7 in which an extruder is used for the extrusion process and the manner by which said lubricant is introduced in connection with the sheath extrusion process is by injection of both the lubricant and the nylon material directly into the extruder.
15. The process as defined by claim 7, wherein the so manufactured power cable has the characteristic that a coefficient of friction of said cable is about the same or less than a coefficient of friction of another power cable of the same type and size having only externally applied lubricant and substantially no other lubricant, the coefficient of friction being determinable based on a frictional force between a cable and a PVC conduit, said frictional force determinable as a function of an average back tension applicable to the cable and an average amount of force required to pull the cable through a test apparatus, the test apparatus comprising (i) PVC conduit that is sized to accommodate the cable, (ii) a first conduit segment of about 30 feet, (iii) a second conduit segment of about 5 feet and (iv) a third conduit segment of about 10 feet with each conduit segment separated by a 90° bend, wherein the test apparatus applies a back tension to the cable.
16. The process as defined by claim 15 wherein the coefficient of friction of the so manufactured power cable is between about 0.125 and about 0.250.
17. The process as defined by claim 16 wherein the silicone based pulling lubricant resulting in said coefficient of friction is, respectively, between about 14.00%, by weight, and about 3.00%, by weight.
18. The process as defined by claim 15 wherein the coefficient of friction of the so manufactured power cable is between about 0.125 and about 0.2.
19. The process as defined by claim 18 wherein the silicon based pulling lubricant is, respectively, between about 14.00%, by weight, and about 5.00%, by weight.
20. The process as defined by claim 15, wherein the externally applied lubricant is one of fluorinated oil and molybdenum disulfide.
21. The process as defined by claim 15, wherein the externally applied lubricant is Y 77.
22. The process as defined by any one of claims 15 and 21, wherein the conduit fill is about 28%.
23. An improved process of manufacturing a finished power cable assembly of the type comprising a central conductor and a surrounding sheath of at least one outer layer of nylon material defining the exterior surface of the finished cable, said process comprising:
(a) combining a erucamide pulling lubricant with said nylon material, the erucamide pulling lubricant being of a concentration sufficient to reduce the required installation pulling force of the cable during its installation through building passageways in rafters or joists or conduit bends, and further of the type which either permeates throughout, or migrates through, the at least one outer layer of the sheath to be available at the said exterior surface as said cable is pulled along an installation surface; and
24. The process as defined by claim 23 in which the erucamide pulling lubricant is in a concentration, by weight, of approximately 0.85%.
25. The process as defined by claim 23 in which the erucamide pulling lubricant is in a concentration, by weight, of between about 0.25% and 0.85%.
26. In a method for manufacturing a lubricated power cable of the type comprising a conductor and an extruded sheath surrounding at least said conductor, in which the sheath has at least its exterior portion formed of nylon material, the improvement in which a pulling lubricant is introduced in said material in connection with a process for extrusion of the sheath, which pulling lubricant after such introduction becomes available at at least the exterior surface of said sheath to facilitate such lubricated cable to be pulled along an installation surface through building passageways in rafters or joists or conduit bends, the lubricant being in a concentration sufficient to reduce the required installation pulling force, for installation of the lubricated cable through said building passageways, from an installation pulling force required to install, through said passageways, cable of the same type and size, but having essentially no lubrication at said exterior portion, wherein the required installation pulling forces correspond to those which would be measured by pulling the said cable through test apparatus incorporating an arrangement of PVC conduit that is sized to accommodate the cable having an initial 10 foot straight section of conduit, followed by a 90° bend having a left-orientation, followed by a first 90° bend having a right-orientation, followed by a 30 foot straight section of conduit, followed by a second 90° bend having a right-orientation, followed by a 5 foot straight section of conduit, followed by a third 90° bend having a right-orientation, followed by a 10 foot straight section of conduit.
27. The process as defined by claim 26, wherein the required installation pulling force for installation of the lubricated power cable through the test apparatus would be reduced between about 25% and about 75%, from an installation pulling force that would he required to install through the test apparatus the cable of the same type and size and having essentially no lubrication at said exterior portion.
28. In a method for manufacturing a lubricated power cable of the type comprising a conductor and an extruded sheath surrounding at least said conductor, in which the sheath has at least its exterior portion formed of nylon material, the improvement in which a pulling lubricant is introduced in said nylon material in connection with a process for extrusion of the sheath, which pulling lubricant after such introduction becomes available at at least the exterior surface of said sheath to facilitate such lubricated cable to be pulled along an installation surface through building passageways in rafters or joists or conduit bends, the lubricant being in a concentration sufficient to reduce the required installation pulling force, for installation of the lubricated cable through said building passageways, of a quantifiable reduction of at least about 50% of the required installation pulling force to install, through said passageways, cable of the same type and size as said lubricated cable, but having essentially no lubrication at said exterior portion, wherein the respective required installation pulling forces correspond to those which would be measured by pulling the said cable through test apparatus incorporating an arrangement of conduit (i) constructed of a PVC conduit that is sized to accommodate said power cable, and (ii) comprising a first conduit segment of about 10 feet separated from a second conduit segment of about 30 feet by two 90° bends, the second conduit segment separated from a third conduit segment of about 5 feet by a 90° bend, and the third conduit segment separated from a fourth conduit segment of about 10 feet by another 90° bend.
29. The method of claim 28, wherein the quantifiable reduction is up to about 75%.
30. In a method for manufacturing a lubricated power cable of the type comprising a conductor and an extruded sheath surrounding at least said conductor, in which the sheath has at least its exterior portion formed of nylon material, the improvement in which a pulling lubricant is introduced in said material in connection with a process for extrusion of the sheath, which lubricant after such introduction becomes available at at least the exterior surface of said sheath to facilitate such cable to be pulled along an installation surface through building passageways in rafters or joists or conduit bends, the lubricant being in a concentration sufficient to reduce the required installation pulling force, for installation of said lubricated cable through said building passageways, a quantifiable reduction of up to about 75% of the required installation pulling force to install, through said passageways, cable of the same type and size as said lubricated cable, but having essentially no lubrication at said exterior portion, the respective required installation pulling forces corresponding to those which would be measured by pulling the said cable through test apparatus incorporating an arrangement of conduit (i) constructed of a PVC conduit that is sized to accommodate said cable, and (ii) comprising a first conduit segment of about 10 feet separated from a second conduit segment of about 30 feet by two 90° bends, the second conduit segment separated from a third conduit segment of about 5 feet by a 90° bend, and the third conduit segment separated from a fourth conduit segment of about 10 feet by another 90° bend.
US13/274,052 2004-07-13 2011-10-14 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force Active US8382518B2 (en)
US11/120,487 US20060065430A1 (en) 2004-07-13 2005-05-03 Electrical cable having a surface with reduced coefficient of friction
US11/675,441 US7749024B2 (en) 2004-09-28 2007-02-15 Method of manufacturing THHN electrical cable, and resulting product, with reduced required installation pulling force
US12/787,877 US8043119B2 (en) 2004-09-28 2010-05-26 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US13/274,052 US8382518B2 (en) 2004-09-28 2011-10-14 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US13/774,677 US8616918B2 (en) 2004-09-28 2013-02-22 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US14/144,150 US9142336B2 (en) 2004-09-28 2013-12-30 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US14/858,872 US20160012945A1 (en) 2005-05-03 2015-09-18 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US15/068,150 US9431152B2 (en) 2004-09-28 2016-03-11 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US15/590,881 US20170243674A1 (en) 2004-09-28 2017-05-09 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US16/015,688 US20180301240A1 (en) 2004-09-28 2018-06-22 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US16/015,716 US20180301241A1 (en) 2004-09-28 2018-06-22 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US12/787,877 Continuation US8043119B2 (en) 2004-07-13 2010-05-26 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US13/774,677 Continuation US8616918B2 (en) 2004-07-13 2013-02-22 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US20120031642A1 US20120031642A1 (en) 2012-02-09
US8382518B2 true US8382518B2 (en) 2013-02-26
ID=46327301
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US12/787,877 Active US8043119B2 (en) 2004-07-13 2010-05-26 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
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US13/774,677 Active US8616918B2 (en) 2004-07-13 2013-02-22 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
US14/144,150 Active US9142336B2 (en) 2004-07-13 2013-12-30 Method of manufacturing electrical cable, and resulting product, with reduced required installation pulling force
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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHAMBERS, TERRY;KUMMER, RANDY D.;ARMSTRONG, JOHN;AND OTHERS;SIGNING DATES FROM 20070620 TO 20070621;REEL/FRAME:027076/0568
2018-01-30 LIMR Reexamination decision: claims changed and/or cancelled
Free format text: REEXAMINATION CERTIFICATE; CLAIMS 9-12, 17, 19 AND 26-30 ARE CANCELLED. CLAIMS 7, 8, 13-16, 18 AND 20-22 ARE DETERMINED TO BE PATENTABLE AS AMENDED. CLAIMS 1-6 AND 23-25 WERE NOT REEXAMINED.