US2348611A - Clamp for holding drill rods or casings - Google Patents

Clamp for holding drill rods or casings Download PDF

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Publication number
US2348611A
US2348611A US446744A US44674442A US2348611A US 2348611 A US2348611 A US 2348611A US 446744 A US446744 A US 446744A US 44674442 A US44674442 A US 44674442A US 2348611 A US2348611 A US 2348611A
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rod
clamp
guideways
balls
block
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US446744A
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Davidson Cecil Stanley
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/34—Telescopic props with parts held relatively to each other by friction or gripping by axially- moving balls, rollers, or the like
    • 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
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/39—Cord and rope holders
    • Y10T24/3993—Ball or roller
    • 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
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17128—Self-grasping
    • Y10T279/17136—Yielding grasping jaws
    • Y10T279/17145—Ball or roller
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/59—Manually releaseable latch type
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18176—Crank, pitman, lever, and slide
    • Y10T74/18182—Pump jack type
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents
    • Y10T74/2066—Friction
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20732—Handles
    • Y10T74/20834—Hand wheels
    • Y10T74/20852—Pivoted

Definitions

  • This invention relates to improvements in devices for holding the operating rods or cables of diamond or other drills used for drilling holes in rocks or soils while extensions are being added or sections removed and which is equally applicable to handling well casings.
  • the principal objects of the invention are to provide a clamp which willefiectively automatically grip the rod, cable or casing when the cutting end has been removed fromthe bottom of a hole so that the lifting device may be uncoupled and sections removed or added as may be desired, and to provide a clamp which will securely hold an extraordinary load but which will be readily releasable so as to permit immediate lowering of the drill or casing.
  • the principal feature of the invention consists in providing a block with inclined guideways opening into a central vertical drill orifice in which steel balls are housed to project into the central orifice to engage and grip the drill rod, means being provided for engaging said balls to lift them out of clamping contact with the rod to permit the rod to be lowered.
  • Figure 2 is a vertical sectional view taken on the line 2-2 of Figure 1.
  • FIG. 3 is a perspective view of the means for unlocking the clamp from holding contact the drill rod.
  • Figure 4 is a plan view with the cover removed of a slightly modified form of the invention.
  • Figure 5 is a vertical sectional view similar to Figure 2 showing the clutch balls at the bottoms of the guideways.
  • a solid block I which is preferably formed of steel but may be of cast metal, is shown in cylindrical form and it is provided with a central, vertical, circular orifice 2, which is with t of slightly larger diameter than the drill rod; cable or casing with which it is to be used.
  • the rod or casing 2 is inserted through th central orifice which is preferably tapered.
  • the guideways 3 are preferably equally spaced,
  • the bottom 4 of each of the'orifices is preferably formed of cupped-shape form.
  • each of the guideways 3 is placed a steel ball 5 which is of slightly smaller diameter than the guideway and will fall to the bottom of the guideway by gravity with the inward part of the perimeter extending into the orifice 2, as shown in Figure 5.
  • Springs 5 may be used to ensure the balls moving into a clutching position even though grease and dirt may get into the ably of quadrangle form as illustrated by dotted lines in Figure 1,
  • a base plate 9 is secured to the bottom face of the block I and encloses the recess 1 and radial opening 8.
  • a ringshaped cam I 0 formed with cam surfaces l l in the upper edge corresponding in number with the number of guideways 3.
  • a handle I2 is secured to the cam ring l0 and extends out through the radial slot 8 to provide the means for manipulating the cam.
  • a cover plate [3 is provided which is secured on top of the block I to close the upper end of the guideways 3 so that the balls will not fall out when the clamp is being handled.
  • FIG. 5 A slight modification of the device is illustrated in Figure 5.
  • the block 14 is similar to the block I but it is provided with a radial slot I5 extending out from the central orifice 2 so that instead of the block having to be threaded over the rod it can be slipped into position even when the rod i coupled to the lifting or drilling mechanism.
  • the blocks l or Hi can be made of a very heavy cross section to withstand any outward pressure that may be applied thereto by the weight of the drilling tool, and the surfaces of the guideways may be tempered or chilled to prevent pitting through the applied pressure against the balls when heavy loads are checked quickly.
  • the device is simple and inexpensive to build but is extremely effective in operation and, as will be readily understood, it can be used in various diameters and with different numbers of ball grips so that it may be accommodated to use in handling well casings and cables as Well as the ordinary drill rod.
  • a block provided with a central orifice has a plurality of inwardly inclined guideways extending longitudinally thereof, the lower portions of said guideways entering said central orifice, said block having a circular slot concentric with the central orifice extending upwardly from the bottom and intersecting the lower ends of said guideways, balls arranged in said guideways, a cam ring rotatably housed in said slot and having upwardly extending portions adapted to engage and lift said balls clear of gripping contact with the rod, and means for securing said cam ring in said slot.
  • a clamp for holding drill rods or the like comprising a block having a central longitudinal orifice and a radial slot extending out from the central orifice, said block having a plurality of inwardly inclined guideways arranged either side of said slotysaid guideways opening into said central orifice, balls arranged in said guideways, a slot concentric with said central orifice extending upwardly from the bottom of the block and entering the bottom of said guideways, a cam member rotatably mounted in .said concentric slot having cam portions extending upwardly to engage the balls in said guideways to lift same clear of gripping contact with the rod inserted in the central orifice, and means extending radially from said cam member for rotating same in said slot.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Earth Drilling (AREA)

Description

y 9, 1944' c. s. DAVIDSON CLAMP FOR HOLDING DRILL RODS OR CASINGS Filed June 12 1942 Patented May 9, 1944 CLAMP FOR HOLDING DRILL RODS OB CASINGS Cecil Stanley Davidson, Falconbridge, Ontario, V
Canada Application June 12, 1942, Serial No. 446,744
3 Claims.
This invention relates to improvements in devices for holding the operating rods or cables of diamond or other drills used for drilling holes in rocks or soils while extensions are being added or sections removed and which is equally applicable to handling well casings.
The principal objects of the invention are to provide a clamp which willefiectively automatically grip the rod, cable or casing when the cutting end has been removed fromthe bottom of a hole so that the lifting device may be uncoupled and sections removed or added as may be desired, and to provide a clamp which will securely hold an extraordinary load but which will be readily releasable so as to permit immediate lowering of the drill or casing.
The principal feature of the invention consists in providing a block with inclined guideways opening into a central vertical drill orifice in which steel balls are housed to project into the central orifice to engage and grip the drill rod, means being provided for engaging said balls to lift them out of clamping contact with the rod to permit the rod to be lowered.
In the accompanying drawing Figure 1 is a plan view of my improved clamp with the cover plate removed.
Figure 2 is a vertical sectional view taken on the line 2-2 of Figure 1.
Figur 3 is a perspective view of the means for unlocking the clamp from holding contact the drill rod.
Figure 4 is a plan view with the cover removed of a slightly modified form of the invention.
Figure 5 is a vertical sectional view similar to Figure 2 showing the clutch balls at the bottoms of the guideways.
In the operation of diamond drills and other forms of drills used in drilling deep holes in rocks or soils it is customary for many hundreds or even thousands of feet of rod or casing to be used and it is necessary to remove the tool from timeto-time from the bored hole. When this operation is being performed the tool-lifting mechanism can only move a limited length of tool out of the hole at one operation and it is necessary to hold the remaining length of the tool securely from slipping while the above-ground sections are being removed. The present invention has been devised to facilitate this operation.
In the form of the invention as illustrated in Figures 1 and 2 a solid block I, which is preferably formed of steel but may be of cast metal, is shown in cylindrical form and it is provided with a central, vertical, circular orifice 2, which is with t of slightly larger diameter than the drill rod; cable or casing with which it is to be used.
The rod or casing 2 is inserted through th central orifice which is preferably tapered.
Arranged adjacent to the orifice 2 and extending downwardly from the top of the block are a plurality of guideways 3, preferably in the form of cylindrical orifices, which extend downward and are inclined inwardly toward the central orifice at a slight angle. The 1ower inner portions of these orifices open through the wall of the orifice 2. The guideways 3 are preferably equally spaced, The bottom 4 of each of the'orifices is preferably formed of cupped-shape form.
Within each of the guideways 3 is placed a steel ball 5 which is of slightly smaller diameter than the guideway and will fall to the bottom of the guideway by gravity with the inward part of the perimeter extending into the orifice 2, as shown in Figure 5. Springs 5 may be used to ensure the balls moving into a clutching position even though grease and dirt may get into the ably of quadrangle form as illustrated by dotted lines in Figure 1,
A base plate 9 is secured to the bottom face of the block I and encloses the recess 1 and radial opening 8. Within the recess 1 and extending up through the circular slot 6 is a ringshaped cam I 0 formed with cam surfaces l l in the upper edge corresponding in number with the number of guideways 3. A handle I2 is secured to the cam ring l0 and extends out through the radial slot 8 to provide the means for manipulating the cam.
When the cam is placed so thatthe lower portions of the cam surfaces are in register with the several guideways the balls 5 will drop to the bottom of the guideways and their inner perimeters will therefore project into the orifice 2 when there is no drill rod extending through the block but when a drill rod is in place the balls will not fall to the bottom but will engage the drill rod in gripping contact as shown in Figure 2 and the downwardy inclined outer side walls of the guideways 3 hold the balls in contact with the rod and the contact of the rod surface with the balls the weight of the rod forces the balls into tight wedging engagement so that the rod, even though having several tons weight thereof, will be gripped and held securely from slipping downwardly into the hole.
When the upper section of the rod has been removed and the lifting mechanism has been again coupled to the rod the upward pull of the lifting mechanism automatically frees the grip of the balls thereon and the rod moves upwardly freely, but if for any reason the lifting mechanism should slip the rod will be automatically gripped.
It is important that after a section of rod has been added and the drill has been raised from the bottom of the hole the clamp should be released and many conditions arise in drilling operations where it is desirable to let the rod down, and further, it is desirable that the clamp should not be in clamping operation when the drill is being operated to bore. In order to release the rod from the gripping device it is merely necessary for the operator to manipulate the handle l2, rotate the cam 10 within the recess 1, bring the cam surfaces into contact with the underside of the balls and thus lift them out of clutching contact with the rod. The rod can be freed in this manner and after having been allowed to slip a desired distance it can be caught again by simply operating the handle l2 to allow the balls to drop down into gripping engagement with the rod.
It is found in practice that this device will grip and hold extraordinary weights even though the movement has accelerated to a considerable speed after being released and there is no appreciable damage to the rod or clamp.
A cover plate [3 is provided which is secured on top of the block I to close the upper end of the guideways 3 so that the balls will not fall out when the clamp is being handled.
A slight modification of the device is illustrated in Figure 5. The block 14 is similar to the block I but it is provided with a radial slot I5 extending out from the central orifice 2 so that instead of the block having to be threaded over the rod it can be slipped into position even when the rod i coupled to the lifting or drilling mechanism.
When a block is formed with an entry slot such as described it will of course be necessary to divide the cam into two parts so that it can be operated to lift the multiple arrangement of balls. Owing to the slot l5 having to open through the cam it will be necessary to provide two ring portions to operate in opposite directions in the guide slot and two handles l6 and I! are shown.
It will be appreciated that the blocks l or Hi can be made of a very heavy cross section to withstand any outward pressure that may be applied thereto by the weight of the drilling tool, and the surfaces of the guideways may be tempered or chilled to prevent pitting through the applied pressure against the balls when heavy loads are checked quickly.
The device is simple and inexpensive to build but is extremely effective in operation and, as will be readily understood, it can be used in various diameters and with different numbers of ball grips so that it may be accommodated to use in handling well casings and cables as Well as the ordinary drill rod.
What I claim as my invention is:
1. In a clamp for holding drill rods or the like, in which a block provided with a central orifice has a plurality of inwardly inclined guideways extending longitudinally thereof, the lower portions of said guideways entering said central orifice, said block having a circular slot concentric with the central orifice extending upwardly from the bottom and intersecting the lower ends of said guideways, balls arranged in said guideways, a cam ring rotatably housed in said slot and having upwardly extending portions adapted to engage and lift said balls clear of gripping contact with the rod, and means for securing said cam ring in said slot.
2. A clamp for holding drill rods or the like, as claimed in claim 1, in which an annular groove is formed in the bottom of said block and is provided with a radial orifice, the cam ring being rotatable in said groove and having a handle extending through said radial orifice, and a base plate closing said annular groove.
3. A clamp for holding drill rods or the like, comprising a block having a central longitudinal orifice and a radial slot extending out from the central orifice, said block having a plurality of inwardly inclined guideways arranged either side of said slotysaid guideways opening into said central orifice, balls arranged in said guideways, a slot concentric with said central orifice extending upwardly from the bottom of the block and entering the bottom of said guideways, a cam member rotatably mounted in .said concentric slot having cam portions extending upwardly to engage the balls in said guideways to lift same clear of gripping contact with the rod inserted in the central orifice, and means extending radially from said cam member for rotating same in said slot.
CECIL STANLEY DAVIDSON.
US446744A 1942-06-12 1942-06-12 Clamp for holding drill rods or casings Expired - Lifetime US2348611A (en)

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Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446445A (en) * 1945-02-27 1948-08-03 Frederick J Van Dusen Shock resisting retainer
US2836208A (en) * 1955-04-15 1958-05-27 Jr Earl H Hoyt Arrow fletching device
US2854058A (en) * 1956-07-11 1958-09-30 Airetool Mfg Co Tube expander with slip clutch controlled mandrel
US2888284A (en) * 1955-03-28 1959-05-26 Holmberg Arne Locking device
DE1064898B (en) * 1954-05-14 1959-09-10 George Aaron Butler Holding device for a pipe string suspended in a deep borehole or the like.
US2955854A (en) * 1957-10-07 1960-10-11 Musser C Walton Monopod
US3049367A (en) * 1958-04-01 1962-08-14 Electrolux Ab Vacuum cleaner connection having reciprocating coupling means
US3071252A (en) * 1957-07-15 1963-01-01 Hanschar Walter Holder for bladed implements
US3118683A (en) * 1961-12-04 1964-01-21 Illinois Tool Works Precision arbor
US3219154A (en) * 1962-08-27 1965-11-23 Yale & Towne Inc Overload protection device for hoists with an axial load brake
US3252180A (en) * 1963-06-26 1966-05-24 Houk Machine Co Adjustable grip for ejector mechanism in an injection mold
US3778869A (en) * 1971-03-15 1973-12-18 American Stress Wire Corp Apparatus for detensioning stranded cable
US4039134A (en) * 1976-04-30 1977-08-02 Redmer Wilbert W Message holder
FR2487938A1 (en) * 1980-07-31 1982-02-05 Powondra Dipl Ing Franz FORCE TRANSMISSION ELEMENT
US4577732A (en) * 1983-05-26 1986-03-25 Wabco Westinghouse Steuerungstechnik Gmbh Brake apparatus to retard relative movement between two members
US5685204A (en) * 1996-01-16 1997-11-11 Snap-On Technologies, Inc. Miniature reversible ratcheting screwdriver
US5960667A (en) * 1997-12-23 1999-10-05 Emhart Inc. Ball device for setting blind riverts
US6065897A (en) * 1998-02-12 2000-05-23 E & E Engineering, Inc. Roller locking mechanisms
US6415476B1 (en) * 2000-01-13 2002-07-09 Mccoy Kevin P. Locking devices and related methods of locking
US6499908B2 (en) * 2000-07-15 2002-12-31 Hilti Aktiengesellschaft Locking system
US6722667B2 (en) * 2000-06-09 2004-04-20 Jore Corporation Workpiece connector for a power tool
US20050023777A1 (en) * 2001-08-25 2005-02-03 Andre Muller Chuck for tools, especially screwdriver bits
US20070267559A1 (en) * 2004-09-20 2007-11-22 Spearing Anthony J S Free Standing Support
US20090145252A1 (en) * 2007-12-10 2009-06-11 Pacific Bearing Company Anti-Backlash Nut, Lead Screw Assembly And Method
US20100219593A1 (en) * 2009-02-27 2010-09-02 Black & Decker Inc. Bit Retention Device
US20100282485A1 (en) * 2009-05-05 2010-11-11 Black & Decker Inc. Power tool with integrated bit retention device
CN102720346A (en) * 2012-06-23 2012-10-10 湖南省第三工程有限公司 Multifunctional upright column base for scaffold and manufacturing process thereof
US20120326401A1 (en) * 2009-02-27 2012-12-27 Black & Decker Inc. Bit Retention Device
US20130291341A1 (en) * 2011-01-26 2013-11-07 Gripple Limited Clamping assembly
US9010205B2 (en) 2011-01-20 2015-04-21 Pacific Bearing Company Linear slide having integral carriage and nut assembly
US9156147B2 (en) 2012-02-15 2015-10-13 Black & Decker Inc. Quick change bit holder with ring magnet
US9227309B2 (en) 2012-02-15 2016-01-05 Black & Decker Inc. Quick change bit holder with ring magnet
US9243697B2 (en) 2011-12-23 2016-01-26 Pacific Bearing Company Nut with flexible fingers and radial compression members
US9303742B2 (en) 2011-11-28 2016-04-05 Pacific Bearing Company Inverted spline rail system
US9334937B2 (en) 2013-07-03 2016-05-10 Pacific Bearing Company Floating nut and carriage assembly
US20160237720A1 (en) * 2013-09-30 2016-08-18 Mgt Industries S.R.L. Quick connection and/or fixing system for door leaves, flaps or similar elements and door leaf provided with said system
US9505108B2 (en) 2012-02-15 2016-11-29 Black & Decker Inc. Bit holder with floating magnet sleeve
USD789761S1 (en) 2015-11-02 2017-06-20 Black & Decker Inc. Torsion bit
US9943946B2 (en) 2012-02-15 2018-04-17 Black & Decker Inc. Tool bits with floating magnet sleeves
US10150205B2 (en) 2012-02-15 2018-12-11 Black & Decker Inc. Fastening tools with floating magnet sleeves
US11300148B2 (en) 2012-03-28 2022-04-12 Giancarlo Brun Quick fastening and/or connection system
US11434734B1 (en) 2021-04-15 2022-09-06 Petol Gearench Division of Orbix Corporation Sucker rod transfer assembly
US11598400B2 (en) 2020-11-19 2023-03-07 Pacific Bearing Corporation Nut with flexible fingers and self-aligning members

Cited By (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446445A (en) * 1945-02-27 1948-08-03 Frederick J Van Dusen Shock resisting retainer
DE1064898B (en) * 1954-05-14 1959-09-10 George Aaron Butler Holding device for a pipe string suspended in a deep borehole or the like.
US2888284A (en) * 1955-03-28 1959-05-26 Holmberg Arne Locking device
US2836208A (en) * 1955-04-15 1958-05-27 Jr Earl H Hoyt Arrow fletching device
US2854058A (en) * 1956-07-11 1958-09-30 Airetool Mfg Co Tube expander with slip clutch controlled mandrel
US3071252A (en) * 1957-07-15 1963-01-01 Hanschar Walter Holder for bladed implements
US2955854A (en) * 1957-10-07 1960-10-11 Musser C Walton Monopod
US3049367A (en) * 1958-04-01 1962-08-14 Electrolux Ab Vacuum cleaner connection having reciprocating coupling means
US3118683A (en) * 1961-12-04 1964-01-21 Illinois Tool Works Precision arbor
US3219154A (en) * 1962-08-27 1965-11-23 Yale & Towne Inc Overload protection device for hoists with an axial load brake
US3252180A (en) * 1963-06-26 1966-05-24 Houk Machine Co Adjustable grip for ejector mechanism in an injection mold
US3778869A (en) * 1971-03-15 1973-12-18 American Stress Wire Corp Apparatus for detensioning stranded cable
US4039134A (en) * 1976-04-30 1977-08-02 Redmer Wilbert W Message holder
FR2487938A1 (en) * 1980-07-31 1982-02-05 Powondra Dipl Ing Franz FORCE TRANSMISSION ELEMENT
US4577732A (en) * 1983-05-26 1986-03-25 Wabco Westinghouse Steuerungstechnik Gmbh Brake apparatus to retard relative movement between two members
US5685204A (en) * 1996-01-16 1997-11-11 Snap-On Technologies, Inc. Miniature reversible ratcheting screwdriver
US5960667A (en) * 1997-12-23 1999-10-05 Emhart Inc. Ball device for setting blind riverts
US6065897A (en) * 1998-02-12 2000-05-23 E & E Engineering, Inc. Roller locking mechanisms
US6415476B1 (en) * 2000-01-13 2002-07-09 Mccoy Kevin P. Locking devices and related methods of locking
US20040262856A1 (en) * 2000-06-09 2004-12-30 Jore Corporation Workpiece connector for a power tool
US6722667B2 (en) * 2000-06-09 2004-04-20 Jore Corporation Workpiece connector for a power tool
US20040094908A1 (en) * 2000-06-09 2004-05-20 Jore Corporation Workpiece connector for a power tool
US6935637B2 (en) 2000-06-09 2005-08-30 Jore Corporation Workpiece connector for a power tool
US6499908B2 (en) * 2000-07-15 2002-12-31 Hilti Aktiengesellschaft Locking system
US20050023777A1 (en) * 2001-08-25 2005-02-03 Andre Muller Chuck for tools, especially screwdriver bits
US7063332B2 (en) * 2001-08-25 2006-06-20 Wera Werk Hermann Werner Gmbh & Co.Kg Chuck for tools, especially screwdriver bits
US20110114813A1 (en) * 2004-09-20 2011-05-19 Anthony John Spencer Spearing Free standing support
US8092121B2 (en) 2004-09-20 2012-01-10 Anthony John Spencer Spearing Free standing support
US7914238B2 (en) 2004-09-20 2011-03-29 Anthony John Spencer Spearing Free standing support
US20070267559A1 (en) * 2004-09-20 2007-11-22 Spearing Anthony J S Free Standing Support
US7992456B2 (en) * 2007-12-10 2011-08-09 Pacific Bearing Company Anti-backlash nut, lead screw assembly and method
US20090145252A1 (en) * 2007-12-10 2009-06-11 Pacific Bearing Company Anti-Backlash Nut, Lead Screw Assembly And Method
US20120326401A1 (en) * 2009-02-27 2012-12-27 Black & Decker Inc. Bit Retention Device
US8622401B2 (en) 2009-02-27 2014-01-07 Black & Decker Inc. Bit retention device
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US9243697B2 (en) 2011-12-23 2016-01-26 Pacific Bearing Company Nut with flexible fingers and radial compression members
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USD789761S1 (en) 2015-11-02 2017-06-20 Black & Decker Inc. Torsion bit
US11598400B2 (en) 2020-11-19 2023-03-07 Pacific Bearing Corporation Nut with flexible fingers and self-aligning members
US11434734B1 (en) 2021-04-15 2022-09-06 Petol Gearench Division of Orbix Corporation Sucker rod transfer assembly

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