US1417890A - Tool for bending springs - Google Patents

Tool for bending springs Download PDF

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Publication number
US1417890A
US1417890A US521152A US52115221A US1417890A US 1417890 A US1417890 A US 1417890A US 521152 A US521152 A US 521152A US 52115221 A US52115221 A US 52115221A US 1417890 A US1417890 A US 1417890A
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bending
tool
jaw
springs
levers
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Expired - Lifetime
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US521152A
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Doonan William Daniel
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/30—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs
    • B25B27/308—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs leaf springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/30—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs

Definitions

  • FIG 3 UNITED STATES PATENT OFFICE WILLIAM DANIEL DOONAN, BUTTE, MONTANA.
  • This invention relates to tools for bending metal, and more particularly to hand 0perated tools for bending curved leaf springs; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed, whereby the leaf springs of motors cars which have deteriorated by use are re-set and restored to their original strength and elasticity without injury to the original temper of the sprlngs.
  • Figure 1 is a front view of a tool for bending springs constructed according to this invention.
  • Fig. 2 is a side view of the same.
  • Fig. 3 is an end view of the jaws.
  • Two levers 5 and 6 are provided, and are pivoted by pins 7 to the end portions of two links 8 which straddle their middle portions.
  • the free end portion 9 of the lever 5 is longer than the free end portlon of the lever 6 and forms one bending jaw of the tool.
  • the lever 6 has a projection 10 on its free end portionv which forms a shoulder 12, and a block 14 is secured on this projection 10 against the shoulder 12.
  • the projection 10 is preferably rectangular to prevent the block from turning, and its end 15 is riveted over to hold the block securely in place.
  • the block 14 has a concave face 16 ar ranged opposite the jaw 9, and projecting laterally on each side of it.
  • the block 14 forms the other jaw, and the leaf spring is set up by pressure between these two aws.
  • a portion of the leaf spring 18 is shown in dotted lines.
  • the spring is heated shghtly, but not sufficiently to draw its original temper, and it is found that springs can be successively re-bent and set up in this manner, provided the jaws are accurately set with relation to each other so as not to bend the spring too much and thereby strain it.
  • the levers 5 and 6 are operated by means Specification of Letters Patent.
  • Adjusting links 25 and 26 are provided, and are pivoted at one end by pins 27 to the handles between the pivot 22 and the stops.
  • the links are pivoted at the other end to the end portions of the levers 5 and 6 by pins 28.
  • Set-screws 30 are screwed into holes in the adjusting links adjacent to the pins 28, and their ends bear against the outersides of the handles. When the screws 30 are screwed up a little they increase the normal distance between the two pins 28, so that the bending jaws are moved closer together.
  • the bending jaws are accurately set by means of the set-screws so that the leaf spring is bent to the maximum extent desired when the stops 2 1 on the handles come together.
  • the handles are relatively very long so that the leverage is very great, and so that the heated springs can be re-bent and set up by hand power without injury to them.
  • a bending tool comprising two pivoted levers one of which has a straight longitudinal end portion which forms one bending jaw, and a block arranged crosswise of the said jaw and secured to the corresponding .end portion of the other lever and provided with a concave bending surface which projects laterally on each side of the said jaw.
  • a bending tool comprising two levers one of which has a straight longitudinal end portion which forms one bending aw, links arranged crosswise of the middle parts of the said levers and having their end portions pivoted to them, and a block arranged crosswise of the said jaw and secured to the corresponding end portion of the other lever and provided with a concave bending surface which projects laterally on each side of the said aw.
  • a bending tool comprising two pivoted levers one of which has a straight longitudinal end portion which forms one bending jaw, and a block arranged crosswise ofthe said jaw and secured to the corresponding said levers, and means for setting the adjusting links laterally with respect to the handles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Description

W.-D. DOONAN.
TOOL FOR BENDING SPRINGS. APPLICATION FiLED 050.9, 1921.
1,417,390, Patented May 30;1922.
FIG 3 UNITED STATES PATENT OFFICE WILLIAM DANIEL DOONAN, BUTTE, MONTANA.
TOOL FOR BENDING SPRINGS.
Application filed December 9, 1921.
To all whom it may concern:
Be it known that I, WILLIAM D. DOONAN, a citizen of the United States, residing at Butte, in the county of Silverbow and State of Montana, have invented certain new and useful Improvements in Tools for Bendlng Springs, of which the following is a specification.
This invention relates to tools for bending metal, and more particularly to hand 0perated tools for bending curved leaf springs; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed, whereby the leaf springs of motors cars which have deteriorated by use are re-set and restored to their original strength and elasticity without injury to the original temper of the sprlngs.
In the drawings, Figure 1 is a front view of a tool for bending springs constructed according to this invention. Fig. 2 is a side view of the same. Fig. 3 is an end view of the jaws.
Two levers 5 and 6 are provided, and are pivoted by pins 7 to the end portions of two links 8 which straddle their middle portions. The free end portion 9 of the lever 5 is longer than the free end portlon of the lever 6 and forms one bending jaw of the tool. The lever 6 has a projection 10 on its free end portionv which forms a shoulder 12, and a block 14 is secured on this projection 10 against the shoulder 12. The projection 10 is preferably rectangular to prevent the block from turning, and its end 15 is riveted over to hold the block securely in place.
The block 14 has a concave face 16 ar ranged opposite the jaw 9, and projecting laterally on each side of it. The block 14 forms the other jaw, and the leaf spring is set up by pressure between these two aws. A portion of the leaf spring 18 is shown in dotted lines. The spring is heated shghtly, but not sufficiently to draw its original temper, and it is found that springs can be successively re-bent and set up in this manner, provided the jaws are accurately set with relation to each other so as not to bend the spring too much and thereby strain it.
The levers 5 and 6 are operated by means Specification of Letters Patent.
Patented May 30, 1922.
Serial No. 521,152.
of two long handles 20 and 21, which are pivoted together at one end by a pin 22, and which have stops 24 at their middle parts which limit their movement toward each other.
Adjusting links 25 and 26 are provided, and are pivoted at one end by pins 27 to the handles between the pivot 22 and the stops. The links are pivoted at the other end to the end portions of the levers 5 and 6 by pins 28. Set-screws 30 are screwed into holes in the adjusting links adjacent to the pins 28, and their ends bear against the outersides of the handles. When the screws 30 are screwed up a little they increase the normal distance between the two pins 28, so that the bending jaws are moved closer together.
The bending jaws are accurately set by means of the set-screws so that the leaf spring is bent to the maximum extent desired when the stops 2 1 on the handles come together. The handles are relatively very long so that the leverage is very great, and so that the heated springs can be re-bent and set up by hand power without injury to them.
What I claim is:
1. A bending tool, comprising two pivoted levers one of which has a straight longitudinal end portion which forms one bending jaw, and a block arranged crosswise of the said jaw and secured to the corresponding .end portion of the other lever and provided with a concave bending surface which projects laterally on each side of the said jaw.
2. A bending tool, comprising two levers one of which has a straight longitudinal end portion which forms one bending aw, links arranged crosswise of the middle parts of the said levers and having their end portions pivoted to them, and a block arranged crosswise of the said jaw and secured to the corresponding end portion of the other lever and provided with a concave bending surface which projects laterally on each side of the said aw.
3. A bending tool, comprising two pivoted levers one of which has a straight longitudinal end portion which forms one bending jaw, and a block arranged crosswise ofthe said jaw and secured to the corresponding said levers, and means for setting the adjusting links laterally with respect to the handles.
In testimony whereof I have afiixed my signature.
*VVILLIAM DANIEL DOONAN.
US521152A 1921-12-09 1921-12-09 Tool for bending springs Expired - Lifetime US1417890A (en)

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US521152A US1417890A (en) 1921-12-09 1921-12-09 Tool for bending springs

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