US3859875A - Hand operated tools - Google Patents

Hand operated tools Download PDF

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Publication number
US3859875A
US3859875A US434909A US43490974A US3859875A US 3859875 A US3859875 A US 3859875A US 434909 A US434909 A US 434909A US 43490974 A US43490974 A US 43490974A US 3859875 A US3859875 A US 3859875A
Authority
US
United States
Prior art keywords
tool
pinion
rack
spring
balls
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
US434909A
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English (en)
Inventor
Zdzislaw Bieganski
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3859875A publication Critical patent/US3859875A/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
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B15/00—Screwdrivers

Definitions

  • a hand-operated tool for imparting unidirectional rotational drive to a screw-thread fastener or the like includes a trigger-actuated drive mechanism for converting linear motion of the trigger of the tool into rotaty movement of the tool bit holder and an adjustable torque-limiting clutch acting between the triggeractuated drive-mechanism and the tool bit holder.
  • the object of the invention is to provide a convenient compact tool for this purpose.
  • a hand-operated tool comprises a butt having a rack and pinion mechanism with the rack displaceable against a return spring by a trigger, and the pinion connected by a one-way clutch to a worm and pinion providing a unidirectionally rotatable final drive shaft, said shaft being connected via an adjustable torque clutch to one part of areleasable coupling, and at least one tool bit provided with a second part of said coupling for interchangeable connection therewith.
  • FIGURE is an elevation, partly in section, of a complete tool.
  • the tool comprises a butt carrying a trigger 12 which is integral with a rack 14 and has a parallel guide stem 16, both the rack and the stern being urged by coiled compression springs 18 so as to project from the butt, and being reciprocable towards the butt so as to rotate pinion 20 which is journalled in the butt.
  • the pinion is fast with the rotor 22 forming the hub of a one-way clutchand the rotor is trapped in a large pinion 24 and a number of balls or rollers 26 are arranged so that in travel of the hub in a clockwise direction (as illustrated) the rollers wedge or jam and transmit motion to the pinion 24, and during return of the rack by the springs, the balls or rollers free and allow the hub to rotate relative to the pinion 24 in the opposite direction.
  • Pinion 24 is meshed with worm 26 carried on a shaft assembly 28 and journalled in the barrel of the pistol-like tool by spaced bearings and bushes 30, 32.
  • the shaft 28 is provided with a hardened insert 34 which is generally annular and has a series of ball accommodating recesses provided in an end face.
  • a final drive shaft 36 Carried by the shaft 28 is a final drive shaft 36 which is journalled in an end portion of theshaft 28 by a fur ther bush 32 and has similar ball accommodating recesses in the end face adjacent the hardened insert and a series of balls 38 is trapped between the two sets of recesses.
  • a torque adjusting screw assembly is located axially of the arrangement with the shank40 of the screw engaged with a threaded portion 42 of the shaft 28, with a ball race 44 trapped between the head of the screw and a compression spring 46 and the spring abutting a shoulder 48 in the final portion 36.
  • the portion 36 is provided with a female coupling part for example comprising pins 52 and spring 54 so that a tool bit comprising coupling part 56 and bit proper 58 can be inserted in the end part of the final drive assembly 36 and engaged therewith for rotation therewith, or released therefrom and spring ejected.
  • a female coupling part for example comprising pins 52 and spring 54 so that a tool bit comprising coupling part 56 and bit proper 58 can be inserted in the end part of the final drive assembly 36 and engaged therewith for rotation therewith, or released therefrom and spring ejected.
  • reciprocation of the trigger 12 causes the shaft 28 to rotate uni-directionally, and the balls 38 transmit this rotational drive to the assembly 36 and hence to the tool 56, 58.
  • the torque transmitted between the shafts 28, 36 is dependent upon the setting of the screw 40 and the spring pressure applied by spring 46 and can be varied by for example removing the tool 56, 58 and inserting a screw driver so as to rotate the screw 40.
  • This increases the spring loading urging the recessed faces together and trapping the balls, since the clutch afforded thereby becomes a slipping clutch when the part 36 moves axially with respect to the part 28 against the spring 46, and the balls move (preferably with the part 36) relative to the hardened insert 34.
  • a hand-operated tool comprising a butt having a rack and pinion mechanism with the rack displaceable against a return spring by a trigger, and the pinion connected by a one-way clutch to a worm and pinion providing a uni-directionally rotatable final drive shaft, said shaft being connected via an adjustable torque clutch to one part of a releasable coupling, and at least one tool bit provided with a second part of said cou pling for interchangeable connection therewith.
  • the one-way clutch comprises a pinion engaged with the rack and fast with the hub, and a series of balls or rollers located between the hub and the pinion which is engaged with the worm, the contour of the hub being such that in one direction of rotation the balls or rollers render the hub and worm pinion fast together, and in the opposite direction of rotation of the rack pinion the balls or rollers move relative to the worm pinion.
  • adjustable torque clutch comprises confronting faces on said pair of parts, a plurality of coupling balls located in recesses in said faces, and spring means urging the faces towards one another.
  • said spring means comprise a helical compression spring located in the bore of one of the parts, a screw extending through said spring and compressing the same, the screw being engaged with the otherof the parts.
  • releasable coupling comprises an ejector spring

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
US434909A 1973-01-19 1974-01-21 Hand operated tools Expired - Lifetime US3859875A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB282773 1973-01-19

Publications (1)

Publication Number Publication Date
US3859875A true US3859875A (en) 1975-01-14

Family

ID=9746689

Family Applications (1)

Application Number Title Priority Date Filing Date
US434909A Expired - Lifetime US3859875A (en) 1973-01-19 1974-01-21 Hand operated tools

Country Status (5)

Country Link
US (1) US3859875A (US06566495-20030520-M00011.png)
JP (1) JPS5041198A (US06566495-20030520-M00011.png)
DE (1) DE2402526A1 (US06566495-20030520-M00011.png)
FR (1) FR2214558B3 (US06566495-20030520-M00011.png)
IT (1) IT1003439B (US06566495-20030520-M00011.png)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983004208A1 (en) * 1982-05-24 1983-12-08 Wallis Frederick A Ratchet wrench
WO1983004207A1 (en) * 1982-05-27 1983-12-08 Dennis John Paul Improvements in or relating to spanners

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0711890Y2 (ja) * 1989-09-20 1995-03-22 宮井サンフレックス工業株式会社 フレキシブル回転工具

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756090A (en) * 1971-10-04 1973-09-04 R Mella Mini screw driver

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756090A (en) * 1971-10-04 1973-09-04 R Mella Mini screw driver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983004208A1 (en) * 1982-05-24 1983-12-08 Wallis Frederick A Ratchet wrench
US4592254A (en) * 1982-05-24 1986-06-03 Wallis Frederick A Ratchet wrench
WO1983004207A1 (en) * 1982-05-27 1983-12-08 Dennis John Paul Improvements in or relating to spanners

Also Published As

Publication number Publication date
DE2402526A1 (de) 1974-07-25
FR2214558A1 (US06566495-20030520-M00011.png) 1974-08-19
IT1003439B (it) 1976-06-10
JPS5041198A (US06566495-20030520-M00011.png) 1975-04-15
FR2214558B3 (US06566495-20030520-M00011.png) 1976-11-05

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