US3712352A - Depth adjusters and interchangeable locators for screwdrivers - Google Patents

Depth adjusters and interchangeable locators for screwdrivers Download PDF

Info

Publication number
US3712352A
US3712352A US00140728A US3712352DA US3712352A US 3712352 A US3712352 A US 3712352A US 00140728 A US00140728 A US 00140728A US 3712352D A US3712352D A US 3712352DA US 3712352 A US3712352 A US 3712352A
Authority
US
United States
Prior art keywords
locking
locator
sleeve
bit
bit housing
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
US00140728A
Other languages
English (en)
Inventor
G Lafferty
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.)
Milwaukee Electric Tool Corp
Original Assignee
Milwaukee Electric Tool 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 as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Milwaukee Electric Tool Corp filed Critical Milwaukee Electric Tool Corp
Application granted granted Critical
Publication of US3712352A publication Critical patent/US3712352A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0064—Means for adjusting screwing depth

Definitions

  • a depth adjuster made of injection molded plastic parts has a bit housing which screws onto the projecting externally threaded nose on the gear housing of a standard electric powered hand tool provided with a positive pressure engaged clutch.
  • the bit housing has a bore to accommodate the clutch chuck and the shank of a bit for a screw head.
  • the bore passes through an extending neck on the bit housing which is externally threaded and provided with an outwardly facing shoulder having locking tabs. Onto this neck is threaded a locator assembly of a type designed for a particular application. This assembly has three parts which are snapped into place and remain assembled even when disconnected from the bit housing.
  • These parts consist of (1) a locking collar with locking slots which engage with the locking tabs, (2) a locator sleeve which has limited axial movement and a nonrotative movement with respect to the locking collar, and (3) a compression spring which axially urges the locking collar rearwardly toward the outer extreme of its limited motion with respect to the locator sleeve.
  • This invention relates to an improved depth adjuster for electric powered hand tools used to apply self drilling, self tapping fasteners, drywall fasteners, and the like.
  • the invention specifically features: the use of injection molded parts; a locator assembly which cannot be disassembled without destruction; a standardized bit housing; and a standardized locking collar and locking collar spring with which a variety of locating sleeves for different applications can be assembled to provide locator assemblies suited for use in particular applications.
  • Depth adjusters for positive clutch electric powered hand tools used to apply fasteners including: (1) a bit housing to be mounted on the tool; (2) a locking collar; (3) a locator sleeve threadably mounted on the bit housing; and (4) a locking collar spring are well known prior art. Examples are shown and described in U.S. Pat. No. 2,940,488 issued June 14, 1960, and in the Service Parts List of Milwaukee Electric Tool Corp. identified as Bul. 54-42-5102 Catalog No. 6746-1 and Bul. 54-42-5454 Catalog No. 6796-1 (copies of which are attached for including in the tile of this application).
  • FIG. 1 is a fragmentary view in axial cross-section of an electric powered hand tool having applied to it a depth adjuster embodying the present invention
  • FIG. 2 is an exploded view in perspective showing the bit housing and locator assembly constituting parts of the depth adjuster embodying the present invention
  • FIG. 3 is an exploded view in perspective showing the elements comprising the locator assembly
  • FIG. 4 is an axial sectional view of the locator assembly
  • FIG. 5 is a sectional view similar to FIG. 1 showing the parts when driving the screw with the clutch in engagement;
  • FIG. 6 is a sectional view similar to the view FIG. 5 showing the parts in stopped position with screw head flush with the work surface;
  • FIG. 7 is a sectional view similar to that of FIG. 6 showing the depth adjuster adjusted to stop driving action prior to the complete setting of the screw;
  • FIG. 8 is a sectional view similar to the view of FIG. 5 showing a depth adjuster and locator sleeve adjusted to seat a screw below the surface of a workpiece.
  • This drill has a clutch gear 10 mounted within its gear housing 11.
  • This clutch gear receives motor torque through its geared teeth and transmits it to its clutch teeth.
  • Mounted within an extending neck 13 of the gear housing is a clutch chuck 12 which is carried in a roller bearing 14.
  • This clutch chuck has a standard non-circular bore for receiving the shank of a bit.
  • the interchanging teeth and recesses of the clutch gear and the clutch chunk are of standard well-known design.
  • bit housing 16 mounted on the neck 13 is a bit housing 16.
  • This bit housing is formed by injection molding of a plastic known in the trade as Black Nylatron GS, a product of The Polymer Corp. It is a molybdenum-disulfide filled nylon moisture stabilized at 2 percent water content. It has an internal bore with an enlarged inner end with internal threads and an outer projecting neck 18 provided with external male adjustment threads 19.
  • a screwdriving bit 20 of conventional design is housed in this bit housing and conventionally engaged with the clutch chuck 12.
  • a locator assembly later described in detail is supported on the neck 18. As shown in FIG. 2 lands 22 and recesses 24 are formed in angular spaced relation on the outside of the enlarged end.
  • angularly spaced reference arrows may also be formed on certain of the lands 22 to show the relative rotational positions between the bit housing and locking collar.
  • An important part of the bit housing is the forwardly facing surface 26 from which project locking tabs 28 the purpose of which will be hereinafter described.
  • a feature of this invention is the locator assembly shown in the exploded views of FIGS. 2 and 3 before its parts are assembled and in the assembled view of FIG. 4 with its parts assembled.
  • This assembly consists of three mechanical elements: (1) a locking collar 30; (2) a locator sleeve 32; and (3) a compression spring 34. When these are assembled as shown in FIG. 4 they may not be disassembled without destroying the interlocking feature hereinafter described.
  • the advantage of this is that the operator in making an adjustment for depth control cannot accidentally disassemble the parts and in particular allow the spring to fly out of position and become lost.
  • the locking collar 30 is also formed by injection molding of the same material as set forth above in the description of the bit housing 16. It has an internal bore 36 in which the spring 34 is contained. As clearly shown in FIG. 2 it has an intumed flange 38 at the inner end of the bore. The inner flange 38 has angularly spaced locking slots 42 into which the locking tabs 26 on the bit housing fit when aligned to prevent relative rotation between the bit housing 16 and the locking collar 30 during normal operation of the driver. Each time there is an alignment between the tabs 28 and the slots 42 the compression spring 34 acting between inner end of the locator sleeve and the flange 38 forces the slots 42 toward and into engagement with the tabs 28.
  • the locking collar 30 is preferably provided with angularly spaced lands 44 and recesses 46. Reference numerals such as 1 through 4 may also be formed on certain spaced lands 44 to align the reference arrows on the bit housing with reference members to help the operator change adjustment as later described.
  • the locking collar 30 with compression spring 34 wormed into the bore 36 comprises a standardized subassembly which is the same size for each different complete assembly which includes locator sleeves designed for different applications. Since the mechanical characteristics of the various locator sleeves which cooperate with locking collar and spring subassembly and the adjuster thread 19 on the bit housing are the same, only one a so-called standard locator sleeve will be described in detail.
  • an inturned flange 40 at the outer end of the bore 36 of the locking collar has angularly spaced slots 48 into which are slidably fitted longitudinally extending angularly spaced lands 50 on the locator sleeve 32. Between such lands the locator sleeve has rearwardly extending flexible fingers 52 the ends of which support radially projecting locking teeth 54.
  • the forward surface of these teeth is sloped as shown in FIG. 4 so that during assembly the fingers will be inwardly depressed by the angularly spaced portions of the flange 40 and as these teeth slide inwardly and pass beyond such portions they will be sprung outwardly to the position shown in FIG. 4 and the teeth will engage the inner face of such portions to prevent disassembly of the locator sleeve from the locking collar.
  • the locator sleeve 32 is shaped as shown in FIG. 2 and is classified as standard. It has a frusto-conical nose 56 and a central bore 58. At the inner end of this bore are internal female adjustment threads 60 which mate with the external threads 19 on the neck of the bit housing in the manner shown in FIG. 1.
  • the adjustment threads on the locator sleeve and bit housing are at a pitch of 16 threads per inch.
  • each full revolution represents one-sixteenth inch axial movement.
  • the assembly may be locked in one-fourth turn increments, resulting in a fine adjustment in one sixty-fourths inch increments.
  • the numbers 1 through 4 on the perimeter of the locking collar can be aligned with four arrows on the bit housing.
  • the operator may choose any arrow and using it as a reference point, rotate the locator sleeve assembly two numbers, correspondingly changing the adjustment two sixty-fourths inch.
  • the locking collar may be moved axially with respect to the locator sleeve and rotated to also rotate the locator sleeve the operator may make the adjustment by one hand.
  • the systems presently offered require two hands to make an adjustment, one must hold the locking collar and the other turn the locator sleeve.
  • locator sleeves may be offered with various characteristics to create different assemblies. It has been found advantageous to provide complete factory made and inspected locator assemblies as this insures that the quality of the fit between the locator sleeve and the screwdriving bit is readily maintained over a prolonged period.
  • the .lubricant which is inherent in the thermoplastic material used in these assemblies will prolong the life of the relatively expensive screwdriving bit and prolong the life of the desired quality of fit. This is not true of the assemblies manufactured from steel.
  • a depth adjuster adapted for mounting on an electric powered hand tool, said tool having a positive pressure engaged clutch including a clutch chuck for receiving a bit, and a gear housing having an externally threaded neck, said adjuster comprising:
  • bit housing threadedly mounted on the neck of the tool, said bit housing having spaced locking tabs and an adjusting thread;
  • a locator assembly consisting of (1) a locking collar with spaced locking slots into which said locking tabs fit, (2) a locator sleeve carried by said locking collar and having limited axial movement and non-rotative movement with respect thereto, said locator sleeve having an adjusting thread engaged with the adjusting thread on said bit housing, and (3) a compression spring acting directly between said locking collar and said locator sleeve to move said locator sleeve to the outer limit of its limited axial movement with respect to said locator sleeve.
  • said locking means consists of locking tabs projecting from a forwardly facing surface on the bit housings;
  • said locking means on said bit housing consists of spaced locking slots in an inner flange into which said locking tabs fit when aligned to prevent relative rotation between said bit housing and said locking collar to maintain the required depth adjustment.
  • said locking collar has an internal bore in which said compression spring is contained and an inturned flange at the outer end of said bore with angularly spaced slots;
  • said tabs and slots being angularly spaced with relation to said pitch so that the operator may change the depth adjustment by two sixth-fourths inch by rotating said locator sleeve so that a reference marking on said sleeve is moved into alignment with a reference marking on said bit housing spaced two lands from the reference marking on said bit housing with which reference marking on said sleeve was initially aligned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
US00140728A 1971-05-06 1971-05-06 Depth adjusters and interchangeable locators for screwdrivers Expired - Lifetime US3712352A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14072871A 1971-05-06 1971-05-06

Publications (1)

Publication Number Publication Date
US3712352A true US3712352A (en) 1973-01-23

Family

ID=22492540

Family Applications (1)

Application Number Title Priority Date Filing Date
US00140728A Expired - Lifetime US3712352A (en) 1971-05-06 1971-05-06 Depth adjusters and interchangeable locators for screwdrivers

Country Status (4)

Country Link
US (1) US3712352A (ja)
JP (1) JPS5434960B1 (ja)
CA (1) CA938138A (ja)
DE (1) DE2220792C3 (ja)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4158970A (en) * 1977-06-15 1979-06-26 Black & Decker Inc. Override arrangement and actuating knob for a shifting mechanism in portable tools
US4647260A (en) * 1984-03-15 1987-03-03 Black & Decker Inc. Depth-adjusting system for a power tool
US4762035A (en) * 1986-09-16 1988-08-09 Makita Electric Works, Ltd. Depth adjusting device for screwdrivers
US5044233A (en) * 1989-04-20 1991-09-03 Matsushita Electric Works, Ltd. Depth adjuster for rotary tools such as screwdrivers
US5601387A (en) * 1995-06-07 1997-02-11 Black & Decker Inc. Depth adjusting system for a power tool
US6499381B2 (en) * 2000-08-11 2002-12-31 Milwaukee Electric Tool Corporation Nosepiece assembly for a power tool
US20040033111A1 (en) * 2001-06-28 2004-02-19 Kriaski John Robert Depth adjusting system for a screw gun
EP1655105A1 (de) * 2004-11-04 2006-05-10 HILTI Aktiengesellschaft Tiefenanschlag-Anordnung
US20090026187A1 (en) * 2007-07-27 2009-01-29 Blake Hobson Stud Welding Tool Adjustment Mechanisms
US20090200758A1 (en) * 2008-02-07 2009-08-13 Chin Hung Lam Auto Locking Chuck
USD725981S1 (en) 2013-10-29 2015-04-07 Black & Decker Inc. Screwdriver with nosepiece
JP2015128803A (ja) * 2014-01-06 2015-07-16 吉野石膏株式会社 保護キャップ
US9155545B2 (en) 2013-10-31 2015-10-13 Enteroptyx, Inc. Surgical drill handpiece with adjustable cutting tool guard
US20160016298A1 (en) * 2014-07-15 2016-01-21 Chervon Intellectual Property Limited Bit accessory and bit assembly
CN105751136A (zh) * 2014-12-18 2016-07-13 南京德朔实业有限公司 适用于批头的配件和具有该配件的批头组件
US9616557B2 (en) 2013-03-14 2017-04-11 Black & Decker Inc. Nosepiece and magazine for power screwdriver
CN108789251A (zh) * 2017-04-26 2018-11-13 株式会社牧田 电动螺丝刀
US10433856B2 (en) 2016-07-11 2019-10-08 Grace Medical, Inc. Surgical drill handpiece with adjustable cutting tool guard
US10821594B2 (en) 2013-10-29 2020-11-03 Black & Decker Inc. Power tool with ergonomic handgrip

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2633777C2 (de) * 1976-07-28 1983-06-30 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schraubvorsatz für Elektrowerkzeuge
DE2946697A1 (de) * 1979-11-20 1981-05-27 Dr.h.c. Artur 7244 Waldachtal Fischer Vorrichtung zum einschrauben von befestigungsschrauben
DE3242862A1 (de) * 1982-11-19 1984-05-24 Hilti Ag, Schaan Handgeraet mit verstellbarem tiefenanschlag
DE3308135A1 (de) * 1983-03-08 1984-09-20 Metabowerke GmbH & Co, 7440 Nürtingen Motorisch angetriebener schraubendreher
US5380132A (en) * 1993-09-10 1995-01-10 Black & Decker Inc. Depth adjusting system for a power tool
CN102407518A (zh) * 2010-09-25 2012-04-11 陈河田 螺丝锁合工具的离合结构
US11345973B2 (en) 2017-10-20 2022-05-31 Jfe Steel Corporation High-strength steel sheet and method for manufacturing the same
WO2019077777A1 (ja) 2017-10-20 2019-04-25 Ｊｆｅスチール株式会社 高強度鋼板およびその製造方法
CN111331546A (zh) * 2020-03-13 2020-06-26 广汽菲亚特克莱斯勒汽车有限公司广州分公司 一种批头保护装置及安全批头

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2790471A (en) * 1955-07-19 1957-04-30 Clinton L Graybill Power driven screw driver
US2940488A (en) * 1959-08-17 1960-06-14 Black & Decker Mfg Co Depth gauge for power-operated screwdriver, nut-runner, and the like
US3298410A (en) * 1964-01-31 1967-01-17 Morifuji Haguruma Seisakusho C Screw holder structure for use with screw drivers
US3454059A (en) * 1967-10-02 1969-07-08 Black & Decker Mfg Co Attaching and adjusting construction for depth locating accessory
US3527273A (en) * 1968-01-24 1970-09-08 Rockwell Mfg Co Adjustable means of limiting driving depth with attachable nosepiece

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1981300U (de) * 1967-10-06 1968-03-14 Fein C & E Verstellbarer tiefenanschlag fuer kraftbetaetigte handschrauber.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2790471A (en) * 1955-07-19 1957-04-30 Clinton L Graybill Power driven screw driver
US2940488A (en) * 1959-08-17 1960-06-14 Black & Decker Mfg Co Depth gauge for power-operated screwdriver, nut-runner, and the like
US3298410A (en) * 1964-01-31 1967-01-17 Morifuji Haguruma Seisakusho C Screw holder structure for use with screw drivers
US3454059A (en) * 1967-10-02 1969-07-08 Black & Decker Mfg Co Attaching and adjusting construction for depth locating accessory
US3527273A (en) * 1968-01-24 1970-09-08 Rockwell Mfg Co Adjustable means of limiting driving depth with attachable nosepiece

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4158970A (en) * 1977-06-15 1979-06-26 Black & Decker Inc. Override arrangement and actuating knob for a shifting mechanism in portable tools
US4647260A (en) * 1984-03-15 1987-03-03 Black & Decker Inc. Depth-adjusting system for a power tool
AU569933B2 (en) * 1984-03-15 1988-02-25 Black & Decker Incorporated Power screw or nut setter
US4762035A (en) * 1986-09-16 1988-08-09 Makita Electric Works, Ltd. Depth adjusting device for screwdrivers
US5044233A (en) * 1989-04-20 1991-09-03 Matsushita Electric Works, Ltd. Depth adjuster for rotary tools such as screwdrivers
US5601387A (en) * 1995-06-07 1997-02-11 Black & Decker Inc. Depth adjusting system for a power tool
US6499381B2 (en) * 2000-08-11 2002-12-31 Milwaukee Electric Tool Corporation Nosepiece assembly for a power tool
US20040033111A1 (en) * 2001-06-28 2004-02-19 Kriaski John Robert Depth adjusting system for a screw gun
US6912932B2 (en) 2001-06-28 2005-07-05 Porter-Cable/Delta Depth adjusting system for a screw gun
CN100551629C (zh) * 2004-11-04 2009-10-21 希尔蒂股份公司 深度限制器装置
US20070163397A1 (en) * 2004-11-04 2007-07-19 Thomas Bader Depth stop device
US7337697B2 (en) * 2004-11-04 2008-03-04 Hilti Aktiengesellschaft Depth stop device
EP1655105A1 (de) * 2004-11-04 2006-05-10 HILTI Aktiengesellschaft Tiefenanschlag-Anordnung
US20090026187A1 (en) * 2007-07-27 2009-01-29 Blake Hobson Stud Welding Tool Adjustment Mechanisms
US8258422B2 (en) * 2007-07-27 2012-09-04 Blake Hobson Plunge adjustment mechanism for a stud welding tool
US20090200758A1 (en) * 2008-02-07 2009-08-13 Chin Hung Lam Auto Locking Chuck
US9616557B2 (en) 2013-03-14 2017-04-11 Black & Decker Inc. Nosepiece and magazine for power screwdriver
US11673241B2 (en) 2013-03-14 2023-06-13 Black & Decker Inc. Nosepiece and magazine for power screwdriver
US10406661B2 (en) 2013-03-14 2019-09-10 Black & Decker Inc. Nosepiece and magazine for power screwdriver
USD725981S1 (en) 2013-10-29 2015-04-07 Black & Decker Inc. Screwdriver with nosepiece
USD739200S1 (en) 2013-10-29 2015-09-22 Black & Decker Inc. Screwdriver
US10821594B2 (en) 2013-10-29 2020-11-03 Black & Decker Inc. Power tool with ergonomic handgrip
USD737647S1 (en) 2013-10-29 2015-09-01 Black & Decker Inc. Nosepiece for screwdriver
US9155545B2 (en) 2013-10-31 2015-10-13 Enteroptyx, Inc. Surgical drill handpiece with adjustable cutting tool guard
JP2015128803A (ja) * 2014-01-06 2015-07-16 吉野石膏株式会社 保護キャップ
US10093005B2 (en) * 2014-07-15 2018-10-09 Chervon (Hk) Limited Bit accessory and bit assembly
US20160016298A1 (en) * 2014-07-15 2016-01-21 Chervon Intellectual Property Limited Bit accessory and bit assembly
CN105751136A (zh) * 2014-12-18 2016-07-13 南京德朔实业有限公司 适用于批头的配件和具有该配件的批头组件
US10433856B2 (en) 2016-07-11 2019-10-08 Grace Medical, Inc. Surgical drill handpiece with adjustable cutting tool guard
CN108789251A (zh) * 2017-04-26 2018-11-13 株式会社牧田 电动螺丝刀

Also Published As

Publication number Publication date
DE2220792A1 (de) 1972-11-16
CA938138A (en) 1973-12-11
DE2220792B2 (de) 1981-02-19
DE2220792C3 (de) 1981-10-29
JPS5434960B1 (ja) 1979-10-30

Similar Documents

Publication Publication Date Title
US3712352A (en) Depth adjusters and interchangeable locators for screwdrivers
US10065296B2 (en) Torque socket having torque adjusting function
US9566695B2 (en) Screw driving device with adjustable countersink depth
CA1254773A (en) Depth-adjusting system for a power tool
CA1106210A (en) Bit retainer for screwdriver
US3527273A (en) Adjustable means of limiting driving depth with attachable nosepiece
KR101841288B1 (ko) 탱리스 나선형상 코일 인서트 삽입공구
US5601387A (en) Depth adjusting system for a power tool
US5341704A (en) Depth adjustment assembly for power tool
US2972271A (en) Predetermined torque release hand tool
US3869942A (en) Driving tool
US6119541A (en) Methods for adjusting a lead screw nut and a nut for adjustably engaging a lead screw
GB2257381A (en) Arbor for hole saw.
US5101698A (en) Screw head depth limiter
US4762035A (en) Depth adjusting device for screwdrivers
US20210323126A1 (en) Torque socket
WO1996002361A1 (en) Ratchet wrench
US5224402A (en) Screw and screwdriver therefor
US4466315A (en) Combination tool including spanner wrench and screwdriver
US6398226B1 (en) Chuck with one-way lock
US2724299A (en) Torque control clutch device for threaded fastener setting tools
US5442980A (en) Nut drive adapter
EP0083860B1 (en) A drive attachment for a power drill or like tool
JP3575491B2 (ja) ドライバ工具用ねじ供給機におけるねじ込み深さ調節装置
US20170072476A1 (en) Spring Loading Insert