US3447353A - Tube and rod bender - Google Patents

Tube and rod bender Download PDF

Info

Publication number
US3447353A
US3447353A US510008A US3447353DA US3447353A US 3447353 A US3447353 A US 3447353A US 510008 A US510008 A US 510008A US 3447353D A US3447353D A US 3447353DA US 3447353 A US3447353 A US 3447353A
Authority
US
United States
Prior art keywords
tube
handle
gear
mandrel
pawl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US510008A
Other languages
English (en)
Inventor
Walter J Noveske
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Emerson Electric Co
Original Assignee
Emerson Electric Co
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 as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Emerson Electric Co filed Critical Emerson Electric Co
Application granted granted Critical
Publication of US3447353A publication Critical patent/US3447353A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
    • B21D7/063—Pliers with forming dies

Definitions

  • a tube and rod binder having a handle with a mandrel disposed on the end of the handle, a hook for engaging the tube and forcing it into the mandrel seat, a first large gear pivotally mounted on the mandrel, a second small gear for driving the large gear and a ratchet handle having a ratchet pawl in engagement with the second gear.
  • This invention relates to tubing and rod benders of the character wherein a tube or rod is secured in a seat on a handle and bent into engagement with a seat in a mandrel disposed on the end of the handle.
  • the present invention contemplates a device where a mechanical advantage is obtained because the bending is effected by a roller that is spaced from the mandrel, thus providing a true bending of the tube.
  • a ratchet mechanism provides an additional mechanical advantage enabling bending of more difiicult types of tubing by persons of moderate strength.
  • FIG. 1 is an elevational view of a bender of the invention
  • FIG. 2 is a side elevational view of a tube holding latch and pawl operator used in the invention
  • FIG. 3 is a fragmentary elevational view from the opposite side to FIG. 1, with the cover plate broken away to show the interior mechanism and the ratchet handle removed;
  • FIG. 4 is a fragmentary section on the line 4-4 of FIG. 1;
  • FIG. 5 is a fragmentary view of the mandrel, illustrating a bending roller and parts of the supporting links therefor in elevation.
  • the invention contemplates a bender where a handle has a housing on one end, which functions as a housing for a gear and ratchet mechanism, with a bending mandrel integral therewith.
  • a main gear member in the housing carries an arm which in turn carries a bending roller that is moved around the mandrel in spaced relation thereto.
  • a ratchet handle is provided and has ratchet means which operates a pinion gear in mesh with the main gear member to operate that member.
  • a latch means is provided to hold the tube or rod in bending ice position and when moved away from the article-holding position releases a holding pawl, which is a part of the ratchet mechanism.
  • a ratchet pawl is automatically moved away from the ratchet pinion, allowing the main gear and its roller-carrying arm to be swung freely to a starting position.
  • the main handle 10 connects at its end to one side of a mandrel and housing 12 of generally semi-circular form.
  • the housing houses the gear mechanism as well as providing a mandrel portion on its periphery about which the tube is bent.
  • the handle is enlarged at 10a, this portion being provided with a shallow tube receiving seat 10b.
  • the housing is provided with a deep tube-receiving seat 12a in the mandrel which extends around the periphery thereof, the seat in the housing being a continuation of the seat in the handle.
  • the seat in the mandrel portion is generally semicircular with the side walls extending slightly above the diameter of the groove for engagement with diametrically opposite sides of the tube being bent.
  • the sides of the handle at 10d are flat and merge with the flat sides 12b of the housing, the outer edge portions of which are marked in degrees as indicated at 120.
  • An elongated boss 10:: is provided on the side of the handle opposite to the side shown in FIG. 1, whereby the handle may be securely gripped in a vise when desired.
  • the tube or rod to be bent is placed in the seat 10b and locked in place by a C-shaped latch 14 which is pivotally journaled on a pin 16 in a window 12d which extends through the housing.
  • the latch is provided with a tube engaging surface 14a which is so designed that when it is swung over the tube it forces the tube into the seat 10b.
  • the latch may have serrations at 14c and 14d to provide for good frictional engagement with a finger when operating the same.
  • a cam surface 14c is provided on the hinge end of the latch for releasing a gear holding pawl later described.
  • the tube or rod is bent the desired degree of bend by a bending roller or shoe which is moved around the periphery of the mandrel in spaced relation thereto by a gear mechanism.
  • the housing 12 is provided with a bearing boss 12e which supports a pivot pin 13 that is rotatably journalled in the boss.
  • a gear member is secured on the end of the pin.
  • the gear element includes a hub 20 with a web portion 20a of S shaped cross-section which carries gear teeth 20b on its periphery.
  • the gear extends around the periphery for approximately 245, one end terminating in a stop abutment 200.
  • An arm 20d extends outwardly from the hub 20 over and beyond the edges of the housing.
  • the end is formed with a threaded opening 202 for the reception of a roller support and clamp stud 21.
  • the base of the housing 12 is provided with a pair of outwardly extending walls 12 on opposite sides which are apertured at 12g for the reception of a pin 22 upon which the ratchet operating handle 24 and pinion 26 are mounted.
  • the teeth of the pinion 26 are in mesh with the teeth 20b of the gear member.
  • the handle 24 is provided with a pair of apertured ears 24a, which are on an offset enlarged end of the handle, through which the pin 22 extends, the ears being disposed on opposite sides of the pinion 26 and between the ears 12 of the housing.
  • the base of the handle enlargement is provided with a blind bore 241;, which opens toward the pinion, and in the bore is a ratchet pawl 28 which is pressed toward the pinion gear by a spring 30 which bottoms in the bore.
  • the pawl 28 is provided with a cam notch 28a and a ratchet release pin 32, pressed into a bore in the housing opposite the pawl, has a slanting surface 32a which engages with the cam surface 28a when the ratchet handle is moved toward the main handle to withdraw the pawl from engagement with the pinion.
  • a cover plate 34 shaped to conform with the opening in the housing and having a center opening 34a to provide a clearance for the hub 20 of the gear member, is secured to the ledge 12h by screws 36.
  • the latch 14 is provided with a cam surface 14e which releases a holding pawl or member when the latch is disengaged from the tube or rod.
  • the window 12d in which the latch is reciprocated, intersects a pocket 12i in the housing adjacent the end of the handle and in which a holding pawl 38 is journalled on a pin 40.
  • the holding pawl is provided with a latch engaging surface 38a and is pressed toward that latch surface by a spring 42 disposed in a pocket 12j and surrounding a locating pin 38b extending from the holding pawl.
  • the end of the holding pawl is provided with a foot portion 38c which, when the latch is released, extends opposite to and acts as a stop for the abutment 200 on the gear member.
  • the holding pawl is shown operated by the latch to position the gear.
  • the cam surface 14a is withdrawn from engagement with the holding pawl and the pointed or toe end 38d engages with the teeth 20b of the gear member preventing the gear member from turning in a clockwise direction, as viewed in FIG. 3, while it is being turned by the pinion 26 in a counterclockwise direction.
  • the gear member 20 has an arm 20d which carries a bending roll 44 on the end by a clamp stud 21. Additional support for the roll is provided, thus enabling the tool to be used for bending very stiff tubing or rods, and comprises a link 46 pivotally journalled on the pivot pin 13 for the gear member and having a slot 46a for engagement around the stem of the clamp stud under the head 21a.
  • the link may be swung out of engagement by loosening the clamp stud and swinging the same around the pivot pin 13 to facilitate insertion of the tube between the roll and the mandrel, for bending. When it is swung back into the position shown in FIG. 1, it provides additional support for the bending roll.
  • the link is provided with a hook-shaped projection 46c which acts as a pointer for cooperation with the scale 120 on the mandrel to indicate the start of a bend and the degrees of bend.
  • the latch 14 is rotated from the position shown in FIG. 1. This causes the holding pawl 38 to be moved by the cam 14e, compressing the spring 42 and removing the point 38d from engagement with the teeth of the gear member 18 and placing the foot 380 in the proper position to be engaged by the stop 200.
  • the ratchet handle 24 is then moved toward the main handle 10. This movement causes the cam surface 28a of the ratchet pawl 28 to engage with the cam surface 32a on the ratchet release pin 32 and withdraw the ratchet pawl from engagement with the teeth of the pinion 26.
  • the gear member is now released and may be moved counterclockwise, as viewed in FIG. 1, to the position shown where the pointer 46c points to O on the scale 12b.
  • the clamp stud 21b may now be loosened, if it is not already loose, and the link 46 swung away from the stud 21.
  • the tube or rod to be bent is placed in the groove 10b in the handle with the end to be bent extending between the bending roll 44 and the mandrel and with the place where the start of the bend is to be made at the mark on the mandrel.
  • the latch 14 is now sprung over the tube.
  • the surface 14a is so designed that it engages with the tube as it is swung over the tube and further swinging of the latch forces the tube securely into the seat on the handle.
  • the link 46 may now be returned to the position shown in FIG. 1 and locked by the clamp stud.
  • the holding pawl 38 was released and moved to a place where it could engage with the teeth, on the 'gear' member 20.
  • the ratchet handle is now moved away from the main handle. This withdraws the ratchet pawl 28 from engagement with the ratchet release pin and the end of the pawl is forced by the spring 30 into engagement with the teeth of the pinion 26.
  • the pawl turns the pinion and it in turn rotates the gear member 20, causing the arm 20d with the roll 44 to be carried around the mandrel and bending the article into the mandrel groove.
  • the ratchet action is continued until the pointer 46c indicates the desired number of degrees of bend.
  • the latch 14 When the bend is completed the latch 14 is moved to release the tube and this also releases the holdingpawl which was previously cooperating with the ratchet pawl.
  • the ratchet handle is moved toward the main handle which releases the ratchet pawl and the gear member 20 may now be rotated back to the start position and the tube removed. This may be facilitated by disengaging the link 46 from the clamp screw 21.
  • a tubing and rod bender comprising a handle, a-
  • mandrel disposed on the end of the handle and having a tube bending seat therein, latch means for holding a tube in the bending position relative to the mandrel, means for engagement with the tube and for forcing it into the seat on the mandrel comprising a first large gear means pivotally mounted on the mandrel and having an arm extending beyond the mandrel seat, a tube engaging member supported by the arm in spaced relation to the mandrel, means to rotate the large gear means comprising a second small gear in mesh with the large gear and a ratchet handle having a ratchet pawl in engagement with the second gear means.
  • a bender as described in claim '1 wherein said handle has an article holding seat and said latch means holds the article in said seat.
  • a second pawl is in engagement with the teeth of said first gear means and said handle is provided with a tube engaging seat and the latch means is pivotally supported by said housing and has a portion extending over the seat into engagement with a tube and a second portion which, upon movement of the latch means to a tube releasing position, engages with said second pawl to move said second pawl from a tooth engaging position of the gear means to a position for engagement with a stop on the gear means 15 for the start of a bending operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US510008A 1965-11-26 1965-11-26 Tube and rod bender Expired - Lifetime US3447353A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US51000865A 1965-11-26 1965-11-26

Publications (1)

Publication Number Publication Date
US3447353A true US3447353A (en) 1969-06-03

Family

ID=24028992

Family Applications (1)

Application Number Title Priority Date Filing Date
US510008A Expired - Lifetime US3447353A (en) 1965-11-26 1965-11-26 Tube and rod bender

Country Status (2)

Country Link
US (1) US3447353A (enEXAMPLES)
BE (1) BE690237A (enEXAMPLES)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685335A (en) * 1970-11-05 1972-08-22 Imp Eastman Corp Tube bender
FR2498953A1 (fr) * 1981-01-30 1982-08-06 Imp Clevite Inc Cintreuse de tubes
US4403496A (en) * 1981-01-30 1983-09-13 Imperial Clevite Inc. Tube bender construction
US4428216A (en) 1982-06-14 1984-01-31 Fling Thomas A Tube bender
US4785650A (en) * 1985-03-15 1988-11-22 M. W. Lusty Limited Tube pipe bender assembly
US6026668A (en) * 1998-05-15 2000-02-22 Hitachi Koki Co., Ltd. Electrically-powered cutting and bending machine
USD485152S1 (en) 2003-04-11 2004-01-13 Stride Tool Inc. Pair of tool handles
US20060277968A1 (en) * 2005-06-09 2006-12-14 Mirtz Richard A Tubing bender and method
US20110040340A1 (en) * 2009-08-17 2011-02-17 Warsaw Orthopedic, Inc. Instruments and Methods for In Situ Bending of an Elongate Spinal Implant
US20120247173A1 (en) * 2011-04-01 2012-10-04 Anthony James Paris Bending instrument and methods of using same
US8713984B2 (en) 2011-01-13 2014-05-06 David Wilson, Jr. Multiple mode, bi-directional universal bending apparatus
EP2759351A1 (en) * 2013-01-25 2014-07-30 Irwin Industrial Tool Company Tube lever bender and related method of use
US9421596B2 (en) 2014-04-16 2016-08-23 University of Alaska Anchorage Bending instrument and methods of using same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1349219A (en) * 1919-10-02 1920-08-10 George R Moore Pipe-bender
US1794689A (en) * 1930-01-14 1931-03-03 Holsclaw Walter Estes Device for bending pipe and the like
GB649379A (en) * 1948-12-10 1951-01-24 Tubela Engineering Company Ltd Improvements relating to bending machines for tubes, rods, bars and the like
US2839957A (en) * 1955-04-15 1958-06-24 Jacob S Buckwalter Pawl and ratchet actuated roller type tube bender
US3336779A (en) * 1964-10-08 1967-08-22 Wallace J Schall Portable tube bender

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1349219A (en) * 1919-10-02 1920-08-10 George R Moore Pipe-bender
US1794689A (en) * 1930-01-14 1931-03-03 Holsclaw Walter Estes Device for bending pipe and the like
GB649379A (en) * 1948-12-10 1951-01-24 Tubela Engineering Company Ltd Improvements relating to bending machines for tubes, rods, bars and the like
US2839957A (en) * 1955-04-15 1958-06-24 Jacob S Buckwalter Pawl and ratchet actuated roller type tube bender
US3336779A (en) * 1964-10-08 1967-08-22 Wallace J Schall Portable tube bender

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685335A (en) * 1970-11-05 1972-08-22 Imp Eastman Corp Tube bender
FR2498953A1 (fr) * 1981-01-30 1982-08-06 Imp Clevite Inc Cintreuse de tubes
US4403496A (en) * 1981-01-30 1983-09-13 Imperial Clevite Inc. Tube bender construction
US4428216A (en) 1982-06-14 1984-01-31 Fling Thomas A Tube bender
US4785650A (en) * 1985-03-15 1988-11-22 M. W. Lusty Limited Tube pipe bender assembly
US6026668A (en) * 1998-05-15 2000-02-22 Hitachi Koki Co., Ltd. Electrically-powered cutting and bending machine
USD485152S1 (en) 2003-04-11 2004-01-13 Stride Tool Inc. Pair of tool handles
US7234338B2 (en) * 2005-06-09 2007-06-26 The Gates Corporation Tubing bender and method
US20060277968A1 (en) * 2005-06-09 2006-12-14 Mirtz Richard A Tubing bender and method
US20110040340A1 (en) * 2009-08-17 2011-02-17 Warsaw Orthopedic, Inc. Instruments and Methods for In Situ Bending of an Elongate Spinal Implant
US8235998B2 (en) * 2009-08-17 2012-08-07 Warsaw Orthopedic, Inc. Instruments and methods for in situ bending of an elongate spinal implant
US8713984B2 (en) 2011-01-13 2014-05-06 David Wilson, Jr. Multiple mode, bi-directional universal bending apparatus
US20120247173A1 (en) * 2011-04-01 2012-10-04 Anthony James Paris Bending instrument and methods of using same
US9003859B2 (en) * 2011-04-01 2015-04-14 University of Alaska Anchorage Bending instrument and methods of using same
EP2759351A1 (en) * 2013-01-25 2014-07-30 Irwin Industrial Tool Company Tube lever bender and related method of use
US9156075B2 (en) 2013-01-25 2015-10-13 Irwin Industrial Tool Company Lever bender and related method of use
US9421596B2 (en) 2014-04-16 2016-08-23 University of Alaska Anchorage Bending instrument and methods of using same

Also Published As

Publication number Publication date
BE690237A (enEXAMPLES) 1967-05-02

Similar Documents

Publication Publication Date Title
US3447353A (en) Tube and rod bender
TWI391215B (zh) 具有易更換切割刀之棘齒手工具
TWI300368B (en) Tubing bender and method
EP2863070A1 (en) Bicycle holder with grip clamp
MXPA05008239A (es) Troquel de maquina dobladora con prensa de banco para sujetar una pieza de trabajo alargada que se doblara.
US5230150A (en) Tubing cutter applying continuous cutting force to tubing
DE2139552C2 (de) Rohrbiegewerkzeug
US2762415A (en) Tube bending tool
US3433042A (en) Tube clamp for a tube bending tool
US3789640A (en) Hand held tube bender
US4379399A (en) Tube bender construction
CN210121626U (zh) 一种具有角度控制机构的铜管折弯机
US4428216A (en) Tube bender
US2150234A (en) Hose clamp applying means
US3735621A (en) Hand operated tube bender
US2036866A (en) Means for forming a band about a package or the like
US1978988A (en) Self sharpening safety razor
US3301036A (en) Small diameter tube bender
US2839957A (en) Pawl and ratchet actuated roller type tube bender
US3662580A (en) Tube bender and method
US2737215A (en) Clamp and method of making the same
US3020949A (en) Machine for making ornamental iron work
US3970001A (en) Lock-up for thin printing plate
US2843176A (en) Draw-type tube straightener with clamping means allowing tube to be laterally inserted and removed
US2481587A (en) Fishing leader making device