US3592247A - Handle for screwdrivers or the like - Google Patents

Handle for screwdrivers or the like Download PDF

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Publication number
US3592247A
US3592247A US749126A US3592247DA US3592247A US 3592247 A US3592247 A US 3592247A US 749126 A US749126 A US 749126A US 3592247D A US3592247D A US 3592247DA US 3592247 A US3592247 A US 3592247A
Authority
US
United States
Prior art keywords
handle
grooves
set forth
tool
longitudinal axis
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
US749126A
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English (en)
Inventor
Johannes J Solf
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.)
Wera Werk Hermann Werner GmbH and Co KG
Original Assignee
Wera Werk Hermann Werner GmbH and Co KG
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 Wera Werk Hermann Werner GmbH and Co KG filed Critical Wera Werk Hermann Werner GmbH and Co KG
Application granted granted Critical
Publication of US3592247A publication Critical patent/US3592247A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/10—Handle constructions characterised by material or shape
    • B25G1/105—Handle constructions characterised by material or shape for screwdrivers, wrenches or spanners

Definitions

  • PATENTEDJULISIQYI 3592247 sum 2 or 2 INVENTOR.
  • the present invention relates to a handle for screwdrivers, or the like, in general, and to such handle having an annular groove within the range of the end of the handle from which the blade extends, and which is followed by a handle body having a widening portion of a larger diameter and a following narrower portion ofa smaller diameter.
  • the conventional known handles for screwdrivers are generally round, hexagonal or square in their profile, with parallel arranged shank flanks. Handles are also known which are in the shape of drops.
  • the frequent drawback of the known handles for screwdrivers is that the gripping of the handle interferes appreciably with the use of a tool equipped with it. It is to be considered that, in connection with different screws and materials, into which they have to be inserted, in addition, a certain pressure in the axial direction of the tool must be exerted, whereby a tight gripping must be released. Deep grooves, as they are applied already for the increase of the gripping ability leads, however, rather to pain-causing pressure on the finger joints upon applying the torque thereon.
  • the grooves have a straight lined base in the crosswise direction of the handle.
  • a favorable feature of the present invention resides alsoin the fact that the hollow grooves are disposed in a hexagonal shape relative to each other.
  • the handle body formed as a variation to a barrel base form, brings about in conjunction with the particular form and position of the hollow grooves the desired optimum adjustment to the-hollow of the hand.
  • the fingers cannot form any longer the normal fist closure about the handle. This reduces the participation of the individual finger members on the engaging face.
  • the present invention takes account of these facts by considering in its special form the contours of the inner face of the closed fist in the screwdriver holding. All fingers of the hand and the hand root itself participate, each finger member finds a hollow groove, on the preferably flat ground of which it supports itself along a larger face.
  • Blister formations are avoided and likewise the occurrence of pressure points.
  • the marginal edges of the hollow grooves are rounded.
  • the grooves, as well as the ring zone of the handle body having the largest diameter prevent a sliding off of the tool in the longitudinal axis by pressure applied correspondingly axially.
  • Themultiedged, preferably six-edge cross section form corresponds in a favorable manner to the folding configuration of the fingers and of the thumb (angular position of the finger joints). Furthermore, a rolling off of the tool from the engagement is avoided to a great extent.
  • the angular symmetrical arrangement of the grooves permits the performance of sufficiently small rotary steps, which is favorable in the end phases of the rotation of screws and which permits the application of a high torque, whereby undesirable movement of the hand body portion between the fingers, as well as in axial direction of the handle but also in rotary direction thereof, is avoided.
  • FIG. 1 is an elevation of a handle for screwdrivers or the like designed in accordance with the present invention
  • FIG. 2 is an axial section of the handle along the lines 2-2 of FIG. 1;
  • FIG. 3 is a section along the lines 3-3 ofFIG. 1;
  • FIG. 4 is a section along the lines 4-4 of FIG. I.
  • FIG. 5 is an elevation showing partly a handle for a screwdriver disposed in the hollow of a hand.
  • the handle is-formed at its end adjacent which a blade 10 extends (FIG. 5) with an annular groove 1.
  • a collar 2 is disposed which terminates in conical direction.
  • the handle-body 3 continuing on the right side of the annular hollow groove 1 is formed deviating from a barrel base form F (see point-dashed line F in FIG. 1).
  • the handle body is designed such, that thereby grooves 5 and 6 extend on both sides of a ringzone 4 arranged in the plane X-X of the largest diameter D of the barrel base form F.
  • the grooves 5 and 6 extend in the longitudinal direction of the handle body 3. They run in the longitudinal direction concavely and'particularly such, that they are reduced from the ring zone 4 of the largest barrel diameter D to smallest or end barrel diameters d1 and d2.
  • the hollow grooves 5 and 6 are arranged adjacent in longitudinal direction next to each other substantially abutting each 'other with formation of marginal edges 7 arranged likewise correspondingly concave.
  • the grooves 5 and 6 are, furthermore, disposed in angular symmetrical arrangement peripherally about the longitudinal axis of the hollow body 3. They have a straight base 8 (FIG. 4) oriented in the crosswise direction of the handle body 3.
  • the angular distance (it amounts to 60'. It has been found'that a hexagonal shape jointly with the chosen particular handle form deviating from a barrel base form corresponds advantageously with the anatomic configuration of the hand.
  • the marginal edges 9 of the hollow grooves '5 and 6 are rounded in crosswise direction, as well as in the longitudinal direction of the-handle body 3.
  • the roundings extend only'so far, that merely the sharp edges produced by the hollow groove are-broken and in addition the multiface basic form and thereby the obtained gripping ability is not lost.
  • the handle body 3 receives in conventional manner the screwdriver blade 10. The latter is shown partly only in'FIG. 2.
  • Wings 11 are attached to the screwdriver blade 10, whereby a greater torque can be transmitted without the danger of loosening-the blade 10 in the handle body 3.
  • the joint fold 16 comes to lie,thereby,between v the center member 17 and the end member 15 lie exactly on the cam position of the ring zone 4 of the largest diameter D of the handle body 3. if supported such, the thumb obtains its largest engaging face. The ball of the thumb and the hand root can thus intimately surround the handle body.
  • the remaining 5 fingers gripping around the handle body find equally favorable mounting positions in the hollow grooves 5 and 6, whereby by formation of the handle body in variation of a barrel base form, full account has been given to the different lengths of the individual finger members and the position of the fingers.
  • the hollow grooves as well as their particular geometrical arrangement provide optimum engagement faces for the fingers and prevent thereby the danger of a sliding of the hand from the handle body.
  • a tool handle particularly a screwdriver handle, comprising said grooves run concavely in the longitudinal direction of said handle.
  • said one end is formed with a collar, and between said collar and one of said reduced sections, an annular groove circumferentially extends having a narrowest diameter of said handle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Food-Manufacturing Devices (AREA)
US749126A 1967-07-31 1968-07-31 Handle for screwdrivers or the like Expired - Lifetime US3592247A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1628088 1967-07-31

Publications (1)

Publication Number Publication Date
US3592247A true US3592247A (en) 1971-07-13

Family

ID=5683131

Family Applications (1)

Application Number Title Priority Date Filing Date
US749126A Expired - Lifetime US3592247A (en) 1967-07-31 1968-07-31 Handle for screwdrivers or the like

Country Status (4)

Country Link
US (1) US3592247A (OSRAM)
JP (1) JPS4827279B1 (OSRAM)
GB (1) GB1174223A (OSRAM)
SE (1) SE334131B (OSRAM)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955451A (en) * 1975-02-14 1976-05-11 Vaco Products Company Hand-held spin-type driver tool
USD256662S (en) 1977-08-27 1980-09-02 Felo-Werkzeugfabrik Screwdriver handle
USD273268S (en) 1981-11-16 1984-04-03 Fiskars Manufacturing Corporation Hand grip for torque applying tools
US5259279A (en) * 1991-05-02 1993-11-09 Wera Werk Hermann Werner Gmbh & Co. Slot screwdriver
USD346943S (en) 1992-11-24 1994-05-17 Willi Hahn Gmbh & Co., Kg Handle for screwdrivers
US5556092A (en) * 1994-10-24 1996-09-17 Theken; Randall R. Ergonomic handle
USD373945S (en) 1995-03-13 1996-09-24 Tsung-Chieh Chang Handle for a screwdriver
US5601003A (en) * 1992-06-12 1997-02-11 Wera Werk Hermann Werner Gmbh & Co. Handle for tools, particularly screwdrivers
US6148701A (en) * 1999-08-24 2000-11-21 Lee; Shu-Chen Tool handle with high driving torque
US6189423B1 (en) * 1999-06-07 2001-02-20 Nina Grahma & Michell V. Kaminski Torque-tool grip, torque tool and method
US6502314B1 (en) * 1999-05-24 2003-01-07 Mccatty Michael S. Knife handle
USD531310S1 (en) * 2004-08-13 2006-10-31 Thomas Jorn Wolter Dental instrument handle
US20060265884A1 (en) * 2003-06-12 2006-11-30 Trbovich Nicholas D Jr Bayonet having a serrated edge and a balanced positioning access point
WO2010040878A1 (es) * 2008-10-06 2010-04-15 Luis Vaamonde Coton Mango para herramientas manuales
US20230116952A1 (en) * 2021-10-18 2023-04-20 Lowe's Companies, Inc. Ergonomic manual driver

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742787A (en) * 1971-07-26 1973-07-03 Creative Tools Reversible drive ratchet hand tool with spherical handle
JPH0572867U (ja) * 1992-03-04 1993-10-05 美佐子 牧野 ロール状フィルムの引出し具及びロール状フィルム巻取 り体
CN103846857B (zh) * 2014-03-14 2016-04-13 上海齐迈五金有限公司 一种多功能手柄

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US239215A (en) * 1881-03-22 baeton
US2056054A (en) * 1934-07-18 1936-09-29 John L Osgood Tool handle
FR1078926A (fr) * 1951-12-13 1954-11-24 Tournevis à manche en bois et plastique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US239215A (en) * 1881-03-22 baeton
US2056054A (en) * 1934-07-18 1936-09-29 John L Osgood Tool handle
FR1078926A (fr) * 1951-12-13 1954-11-24 Tournevis à manche en bois et plastique

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955451A (en) * 1975-02-14 1976-05-11 Vaco Products Company Hand-held spin-type driver tool
USD256662S (en) 1977-08-27 1980-09-02 Felo-Werkzeugfabrik Screwdriver handle
USD273268S (en) 1981-11-16 1984-04-03 Fiskars Manufacturing Corporation Hand grip for torque applying tools
US5259279A (en) * 1991-05-02 1993-11-09 Wera Werk Hermann Werner Gmbh & Co. Slot screwdriver
US5601003A (en) * 1992-06-12 1997-02-11 Wera Werk Hermann Werner Gmbh & Co. Handle for tools, particularly screwdrivers
USD346943S (en) 1992-11-24 1994-05-17 Willi Hahn Gmbh & Co., Kg Handle for screwdrivers
US5556092A (en) * 1994-10-24 1996-09-17 Theken; Randall R. Ergonomic handle
USD373945S (en) 1995-03-13 1996-09-24 Tsung-Chieh Chang Handle for a screwdriver
US6502314B1 (en) * 1999-05-24 2003-01-07 Mccatty Michael S. Knife handle
US6189423B1 (en) * 1999-06-07 2001-02-20 Nina Grahma & Michell V. Kaminski Torque-tool grip, torque tool and method
US6148701A (en) * 1999-08-24 2000-11-21 Lee; Shu-Chen Tool handle with high driving torque
US20060265884A1 (en) * 2003-06-12 2006-11-30 Trbovich Nicholas D Jr Bayonet having a serrated edge and a balanced positioning access point
US7921567B2 (en) * 2003-06-12 2011-04-12 The Ontario Knife Company Bayonet having a serrated edge and a balanced positioning access point
USD531310S1 (en) * 2004-08-13 2006-10-31 Thomas Jorn Wolter Dental instrument handle
WO2010040878A1 (es) * 2008-10-06 2010-04-15 Luis Vaamonde Coton Mango para herramientas manuales
ES2343666A1 (es) * 2008-10-06 2010-08-05 Luis Vaamonde Coton Mango para herramientas manuales.
ES2343666B1 (es) * 2008-10-06 2011-06-08 Luis Vaamonde Coton Mango para herramientas manuales.
US20230116952A1 (en) * 2021-10-18 2023-04-20 Lowe's Companies, Inc. Ergonomic manual driver
US12157219B2 (en) * 2021-10-18 2024-12-03 Lowe's Companies, Inc. Ergonomic manual driver
US20250091193A1 (en) * 2021-10-18 2025-03-20 Lowe's Companies, Inc. Ergonomic manual driver

Also Published As

Publication number Publication date
SE334131B (OSRAM) 1971-04-05
GB1174223A (en) 1969-12-17
JPS4827279B1 (OSRAM) 1973-08-21

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