US1105535A - Screw-extractor. - Google Patents

Screw-extractor. Download PDF

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Publication number
US1105535A
US1105535A US75633413A US1913756334A US1105535A US 1105535 A US1105535 A US 1105535A US 75633413 A US75633413 A US 75633413A US 1913756334 A US1913756334 A US 1913756334A US 1105535 A US1105535 A US 1105535A
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US
United States
Prior art keywords
screw
screws
twist
extractor
tool
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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
US75633413A
Inventor
Julius O Roberts
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to US75633413A priority Critical patent/US1105535A/en
Application granted granted Critical
Publication of US1105535A publication Critical patent/US1105535A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B25B27/18—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 withdrawing broken threaded parts or twist drills
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/898—Helical ribbon Tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/96—Miscellaneous

Definitions

  • My invention relates to screw extractors and, has for its object improvements in devices of that character.
  • the object is to provide an instrument for the removal of screws which have been broken or have lost their heads and cannot be removed by ordinary means.
  • FIG. 1 is a section showing the device applied to the extraction of a set screw which has had its head twisted off; and Fig. 2 is a section online 22 of Fig. 1.
  • A is a set screw embedded in the metal B
  • C is a hole drilled in the center of the screw for the insertion of the instrument.
  • the body part D is preferably square for the purpose of permitting a wrench to be applied to it, and extending downward from the body is a tapered portion E which is given a twist very similar to that of a twistdrill.
  • the taper part is given a left-hand twist, and for the extraction of left-hand screws the tapered part would have a righthand twist.
  • the hole C to be drilled in the screw A should be slightly lar er in diameter than the point of the twist but should not be so Specification of Letters Patent.
  • a hand tool for extracting broken off screws comprising an operating portion, the latter bearing spiral, edged ribs and being sufliciently tapered to adapt it when the tool is inserted in an opening drilled in the screw to be removed, to bite into the walls of such opening when the tool is turned in the direction necessary to unscrew said screw, to thei'eby cause said screw to turn with said too Signed at Salina, Kansas this 20 day of March 1913.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Description

J. O. ROBERTS SCREW EXTRAGTOR. APPLICATION FILED MAKE-1, 1012.
1,105,535. Patented July 28, 1914.
c. u @hzweumf Qzm WZJW i T FFIQE.
JULIUS O. ROBERTS, OF SALINA, KANSAS.
SCREW-EXTRACTOR.
mosses.
,a citizen of the United States of America,
and a resident of Salina, county of Saline, and State of Kansas, have invented certain new and useful Improvements in Screw-Extractors, of which the following isa specification.
My invention relates to screw extractors and, has for its object improvements in devices of that character.
More specifically, the object is to provide an instrument for the removal of screws which have been broken or have lost their heads and cannot be removed by ordinary means.
In the accompanying drawings Figure 1 is a section showing the device applied to the extraction of a set screw which has had its head twisted off; and Fig. 2 is a section online 22 of Fig. 1.
In the said drawings, A is a set screw embedded in the metal B, and C is a hole drilled in the center of the screw for the insertion of the instrument.
The body part D is preferably square for the purpose of permitting a wrench to be applied to it, and extending downward from the body is a tapered portion E which is given a twist very similar to that of a twistdrill. For the extraction of right-hand screws, the taper part is given a left-hand twist, and for the extraction of left-hand screws the tapered part would have a righthand twist.
The hole C to be drilled in the screw A should be slightly lar er in diameter than the point of the twist but should not be so Specification of Letters Patent.
Application filed March 24, 1913.
Patented July 28, 1914.
Serial No. 758,334.
large as to prevent the twist from wedging in the hole by the point of the tool striking the bottom. lVhen the instrument is inserted in the hole C and turned to the left it locks itself by the corners F biting into the metal of the screw. The result of such turning is, of course, to remove the screw by causing it to turn to the left with the tool.
By making the twist portion tapered the same instrument will operate equally well in holes of different sizes, and the same size of tool will work equally well for the removal of both large and small screws. For the removal of large screws it is of course desirable to have the hole C comparatively large so that the strain will come upon the larger and stronger part of the taper E. For convenience in removing small screws I make the top of the shank square and tapered as shown at H for the application of an ordinary bit brace.
What I claim is A hand tool for extracting broken off screws comprising an operating portion, the latter bearing spiral, edged ribs and being sufliciently tapered to adapt it when the tool is inserted in an opening drilled in the screw to be removed, to bite into the walls of such opening when the tool is turned in the direction necessary to unscrew said screw, to thei'eby cause said screw to turn with said too Signed at Salina, Kansas this 20 day of March 1913.
JULIUS O. ROBERTS. Witnesses:
E. L. Winona, B. O. WILDER.
US75633413A 1913-03-24 1913-03-24 Screw-extractor. Expired - Lifetime US1105535A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US75633413A US1105535A (en) 1913-03-24 1913-03-24 Screw-extractor.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US75633413A US1105535A (en) 1913-03-24 1913-03-24 Screw-extractor.

Publications (1)

Publication Number Publication Date
US1105535A true US1105535A (en) 1914-07-28

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Family Applications (1)

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US75633413A Expired - Lifetime US1105535A (en) 1913-03-24 1913-03-24 Screw-extractor.

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852967A (en) * 1956-02-16 1958-09-23 Mueller Co Rotatable power driven tool
US2859782A (en) * 1955-07-01 1958-11-11 Phillips Screw Co Hy-torque drive tool
US2863348A (en) * 1955-12-06 1958-12-09 David L Conger Extractor
US3148566A (en) * 1963-01-08 1964-09-15 Ted F Reetz Extracting tool
US20060191379A1 (en) * 2005-02-25 2006-08-31 Irwin Industrial Tool Company Fastener extractor
US20090183603A1 (en) * 2003-04-25 2009-07-23 Burton Kozak Damaged bolt and screw removing devices
US20100037734A1 (en) * 2003-04-25 2010-02-18 Burton Kozak Damaged bolt and screw removing devices
US20100064863A1 (en) * 2008-09-18 2010-03-18 Combined Products Co. #1 Inc. Adjustable one way screw remover
US7690430B1 (en) 2004-04-05 2010-04-06 Hunziker David G Well casing extraction accessories and method
US8579180B2 (en) 2011-09-23 2013-11-12 Dwight A. Burford Mandrel tool probe for friction stir welding having physically-separate spiraled surfaces

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859782A (en) * 1955-07-01 1958-11-11 Phillips Screw Co Hy-torque drive tool
US2863348A (en) * 1955-12-06 1958-12-09 David L Conger Extractor
US2852967A (en) * 1956-02-16 1958-09-23 Mueller Co Rotatable power driven tool
US3148566A (en) * 1963-01-08 1964-09-15 Ted F Reetz Extracting tool
US20090183603A1 (en) * 2003-04-25 2009-07-23 Burton Kozak Damaged bolt and screw removing devices
US8276482B2 (en) 2003-04-25 2012-10-02 Combined Products Co. #1 Inc. Damaged bolt and screw removing devices
US20100037734A1 (en) * 2003-04-25 2010-02-18 Burton Kozak Damaged bolt and screw removing devices
US8739658B2 (en) * 2003-04-25 2014-06-03 Combined Products Co. #1 Inc. Damaged bolt and screw removing devices
US8485066B2 (en) * 2003-04-25 2013-07-16 Burton Kozak Damaged bolt and screw removing devices
US20120288340A1 (en) * 2003-04-25 2012-11-15 Burton Kozak Damaged Bolt and Screw Removing Devices
US8215206B2 (en) 2003-04-25 2012-07-10 Combined Products Co. #1 Inc. Damaged bolt and screw removing devices
US7690430B1 (en) 2004-04-05 2010-04-06 Hunziker David G Well casing extraction accessories and method
US7152509B2 (en) 2005-02-25 2006-12-26 Irwin Industrial Tool Company Fastener extractor
US20060191379A1 (en) * 2005-02-25 2006-08-31 Irwin Industrial Tool Company Fastener extractor
US20100064863A1 (en) * 2008-09-18 2010-03-18 Combined Products Co. #1 Inc. Adjustable one way screw remover
US8087328B2 (en) 2008-09-18 2012-01-03 Burton Kozak Adjustable one way screw remover
US7905164B2 (en) 2008-09-18 2011-03-15 Combined Products Co. #1 Inc. Adjustable one way screw remover
US20110030518A1 (en) * 2008-09-18 2011-02-10 Combined Products Co. #1 Inc. Adjustable One Way Screw Remover
US8579180B2 (en) 2011-09-23 2013-11-12 Dwight A. Burford Mandrel tool probe for friction stir welding having physically-separate spiraled surfaces

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