The instant invention comprehends a new and improved means for effecting tube bending movement of shoe member 12 about the perpihery of mandrel member 11, to provide tube bends of up to 180 by successive pivotal moyements of handle 16 within the range of movement thereof between the full line position of Fig. To permit shoe member 12 to be spaced outwardly from mandrel member 11, such as to permit insertion and release of tube 17 therebetween, connecting portion 13 of the shoe member is provided with a kidney-shaped opening through which post 14 extends.
A reference line 28 provided on a bevelled outer surface 29 of hole 27 permits accurate registration of the shoe member with the selected markings of scale 24. Connecting portion 13 of shoe member 12 is provided with a hole 27 through which the markings of scale 24 may be viewed. Side surface 23 of mandrel member 11 is provided with a scale 24 indicating the tube bend angle from a starting point 25 marked 0 to a maximum bend point 26 marked 180.
Shoe groove 22 is preferably shallow and mandrel groove 20 is preferably deep to provide improved bending of tube 17, as disclosed in Philippe Patent Re. The bending of tube 17 is effected in tool 10 by the pressing of the tube by shoe member 12 into a peripheral groove 20 of mandrel member 11 extending concentrically of the axis of post 14, which groove terminates at its opposite ends in a chordal surface 21 against which hook 18 is slidably retained.
229910001220 stainless steel Inorganic materials 0.000 description 1.238000006011 modification reaction Methods 0.000 description 1.238000006073 displacement reaction Methods 0.000 description 5.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by IMP Eastman Corp filed Critical IMP Eastman Corp Priority to US804256A priority Critical patent/US2979976A/en Application granted granted Critical Publication of US2979976A publication Critical patent/US2979976A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee IMP Eastman Corp Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US804256A Inventor George E Franck Current Assignee (The listed assignees may be inaccurate.
Google Patents Plier-type tube bending toolÄownload PDF Info Publication number US2979976A US2979976A US804256A US80425659A US2979976A US 2979976 A US2979976 A US 2979976A US 804256 A US804256 A US 804256A US 80425659 A US80425659 A US 80425659A US 2979976 A US2979976 A US 2979976A Authority US United States Prior art keywords handle shaft bending mandrel tube Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
Google Patents US2979976A - Plier-type tube bending tool US2979976A - Plier-type tube bending tool