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WO1996000140A1 - Levier destine a un outil a moteur - Google Patents

Levier destine a un outil a moteur Download PDF

Info

Publication number
WO1996000140A1
WO1996000140A1 PCT/GB1995/001483 GB9501483W WO9600140A1 WO 1996000140 A1 WO1996000140 A1 WO 1996000140A1 GB 9501483 W GB9501483 W GB 9501483W WO 9600140 A1 WO9600140 A1 WO 9600140A1
Authority
WO
WIPO (PCT)
Prior art keywords
operating lever
lever
power tool
members
latching element
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.)
Ceased
Application number
PCT/GB1995/001483
Other languages
English (en)
Inventor
Roger Robert Saunders
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.)
Air Compressors and Tools Ltd
Original Assignee
Desoutter Ltd
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 Desoutter Ltd filed Critical Desoutter Ltd
Priority to AU27479/95A priority Critical patent/AU2747995A/en
Publication of WO1996000140A1 publication Critical patent/WO1996000140A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Definitions

  • the present invention relates to an operating lever for a power tool.
  • One class of conventional power tools is provided with a lever mechanism for activating the tool.
  • some operators have insufficient finger reach to hold the lever in the activated position. Therefore, in order to operate the tool, the operator has to hold the tool awkwardly, which is uncomfortable and may cause the operator' s hand to slip off the lever, deactivating the tool. This is because the lever of such conventional power tools does not suit a wide range of hand sizes.
  • the present invention provides an extendable lever that enables hands of different size to use the power tool.
  • the invention provides an operating lever for a power tool, comprising a first elongate member having an end adapted for pivotal connection to a portion of the power tool, and a second elongate member mounted on the first member, the second member being longitudinally slidable relative to the first member to vary the length of the operating lever.
  • the lever preferably includes means for releasably locating the first and second members at a plurality of predetermined positions relative to each other. Also, it preferably includes limiting means for limiting the extent of travel of the second member relative to the first member.
  • the first and second members are telescopic and are releasably held in a predetermined position by engagement of a displaceable tooth member, in the form of a spring metal member having a raised portion, into one of a plurality of detents.
  • the first and second members may be extended by sliding one on top of the other and engaging by a tongue and groove arrangement.
  • the limiting means may be in the form of a hole which engages the raised portion of the spring metal member and by virtue of a step in the raised portion is prevented from further movement in one direction when engaged with the hole.
  • a power tool according to the present invention includes an extendable lever for operating a function of the power tool.
  • Figure 1 is aside view of a power tool with an operating lever
  • Figure 2 is a longitudinal cross-section through the operating lever, on an enlarged scale.
  • the power tool 1 shown in Figure 1 comprises a body or barrel 3 and an extendable operating lever 5.
  • the power tool 1 is illustrated in its position of use, in which it hanges from a line (not shown) for providing motive power to an air motor (or an electric motor) in the tool.
  • the rear (upper) end of the lever 5 is pivotably attached to the rear portion cf the barrel 3 by a pivot 9.
  • the middle portion of the barrel 3 has a thumb-engaging recess 2, longitudinal r; . 4 which facilitate gripping by the fingers and palm, and a protuberance 7 serving as a hand rest. Between the middle portion and the rear (upper) portion, there is a reversing switch 6 operable by the thumb.
  • the lever 5 is depressed by (at least) the index finger to actuate an on-off switch 8.
  • the extendable lever 5 comprises a first, inner, elongate member 11 whose rear end portion is formed with lugs 12 for attaching the lever to the pivot 9 of the barrel 3.
  • the first, inner member 11 is fitted with a second, outer, elongate member or sleeve 13 which slides over the front end of the inner member 11.
  • the longitudinal axis of the sleeve 13 is substantially parallel to the longitudinal axis of the inner member 11.
  • Permanently fixed to the inner surface of the sleeve 13 is a spring metal latching element 15 which extends along the length of the sleeve and has a raised detent portion 14 positioned approximately halfway along the sleeve.
  • the latching element 15 is connected to the sleeve 13 by a rivet 16 and has a protruding portion 19 which locates it in the sleeve.
  • the inner member 11 includes a plurality of bevelled recesses 17 spaced at intervals along its length and a hole 21 positioned furthest from the pivot end of the member 11.
  • the middle portion of the barrel 3 of the power tool is held by the operator with the extendable lever 5 facing away from him.
  • the tool is activated by squeezing the lever 5 towards the barrel 3.
  • the length of the lever 5 is adjustable by extending it. This is achieved by pulling the sleeve 13 longitudinally to release the raised detent portion 14 of the latching element 15 from one of the recesses 17 and sliding the sleeve 13 until the latching element 15 engages the next recess 17.
  • the hole 21 prevents removal of the sleeve 13 from the inner member 11. This is due to the extent and degree of penetration of the detent portion 14 of the latching element 15 and the shape of the detent portion 14, which is has a step 23 on the forward side which engages against the abutment surface defined by the hole 21.
  • the rearward side of the detent portion 14 has a shallow slope allowing disengagement of the detent portion 14 from the hole 21 in the rearward direction. Therefore, the extendable lever can be adjusted to suit operators having different hand sizes, thus enabling the lever to be reached to activate the tool while the operator' s hand rests against the hand rest.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Scissors And Nippers (AREA)

Abstract

Levier extensible (5) comprenant des premier et second éléments (11, 13) de forme allongée, télescopiques, susceptibles d'être placés de façon amovible, l'un par rapport à l'autre, dans une pluralité de positions prédéterminées, par engagement d'un élément (15) de verrouillage mobile dans un évidement d'une pluralité d'évidements (17). La portée du déplacement relatif des éléments (11, 13) est limitée lorsqu'un épaulement (23) vient buter contre les bords d'un trou (21), par engagement dans celui-ci.
PCT/GB1995/001483 1994-06-27 1995-06-23 Levier destine a un outil a moteur Ceased WO1996000140A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU27479/95A AU2747995A (en) 1994-06-27 1995-06-23 A lever for a power tool

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9412858.4 1994-06-27
GB9412858A GB9412858D0 (en) 1994-06-27 1994-06-27 A lever for a power tool

Publications (1)

Publication Number Publication Date
WO1996000140A1 true WO1996000140A1 (fr) 1996-01-04

Family

ID=10757383

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/001483 Ceased WO1996000140A1 (fr) 1994-06-27 1995-06-23 Levier destine a un outil a moteur

Country Status (3)

Country Link
AU (1) AU2747995A (fr)
GB (1) GB9412858D0 (fr)
WO (1) WO1996000140A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381037A (en) * 1979-10-29 1983-04-26 Black & Decker Inc. Portable electric tool
US4523498A (en) * 1983-02-02 1985-06-18 At&T Technologies, Inc. Ergonomical in-line tool
US5069421A (en) * 1989-10-24 1991-12-03 Nitto Kohki Co., Ltd. Safety device for a pneumatic tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381037A (en) * 1979-10-29 1983-04-26 Black & Decker Inc. Portable electric tool
US4523498A (en) * 1983-02-02 1985-06-18 At&T Technologies, Inc. Ergonomical in-line tool
US5069421A (en) * 1989-10-24 1991-12-03 Nitto Kohki Co., Ltd. Safety device for a pneumatic tool

Also Published As

Publication number Publication date
GB9412858D0 (en) 1994-08-17
AU2747995A (en) 1996-01-19

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