EP0207034B1 - A vibration-absorbing handle - Google Patents

A vibration-absorbing handle Download PDF

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Publication number
EP0207034B1
EP0207034B1 EP86850220A EP86850220A EP0207034B1 EP 0207034 B1 EP0207034 B1 EP 0207034B1 EP 86850220 A EP86850220 A EP 86850220A EP 86850220 A EP86850220 A EP 86850220A EP 0207034 B1 EP0207034 B1 EP 0207034B1
Authority
EP
European Patent Office
Prior art keywords
tool
sleeve
inner sleeve
handle
outer sleeve
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
Application number
EP86850220A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0207034A1 (en
Inventor
Eskil Sundström
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
Priority to AT86850220T priority Critical patent/ATE47072T1/de
Publication of EP0207034A1 publication Critical patent/EP0207034A1/en
Application granted granted Critical
Publication of EP0207034B1 publication Critical patent/EP0207034B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • B25D17/046—Sleeve-like handles surrounding the tool bit
    • 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
    • B25F5/006—Vibration damping means

Definitions

  • the invention relates to device for preventing or suppressing the transfer of vibrations from a tool, such as a chisel which can be gripped and controlled manually, the device consisting of a handle axially displaceable along the tool and comprising an inner sleeve shaped internally within the area of displacement to substantially follow the contours of the tool, the inner surface consisting of a material having relatively low coefficient of friction with respect to normal tool materials, and also an outer sleeve of elastomeric material surrounding the inner sleeve, said outer sleeve to be gripped by the tool operator.
  • Vibrations from machines and tools are a serious ergonomic problem. Operators of hand-held vibrating tools are particularly affected and risk irreversible damage to the fine blood vessels in their arms and hands. This is an extremely frequent occupational injury in cleaning foundry products for which the operator uses a chisel hammer, holding and controlling the actual tool, i.e. the chisel, with one hand. Besides the pain and inconvenience experienced by the individual as a result of these injuries, they also incur considerable expense for the company in replacing workers.
  • a handle of the type described in the introduction considerably reduces the risk of vibration injuries caused by this type of work since the handle greatly reduces the vibrations transferred to the hand holding the tool, the arm, shoulder and neck. However, the handle has its limitations and high vibration frequencies are only marginally absorbed by this known handle.
  • the object of the invention is to eliminate the deficiencies of the handle described above. This is achieved by the outer sleeve being composed of different elements forming substantially cylindrical zones having different degrees of flexibility in radial direction, an inner zone being in con tact with the inner sleeve and an outer zone being located radially outside the inner zone and having a lower degree of flexibility in radial direction than the inner zone.
  • a vibration-absorbing handle 3 according to the invention is applied on a chisel 2 arranged in a chisel-hammer 1.
  • the handle 3 is composed of two main parts: an outer sleeve 4 and an inner sleeve 5.
  • the outer sleeve 4 is made of elastomeric material having a softness degree of about 20 - 45 shore, while the inner sleeve is made of material having a low coefficient of friction with respect to normal tool materials.
  • the inner sleeve 5 consists of two halves 5a, 5b which are applied on the tool 2.
  • the sleeve halves 5a, 5b are then joined by means of a snap-in joint 6 to form a sleeve surrounding the tool 2.
  • the shape of the inner sleeve 5 closely follows the contours of the tool 2.
  • the inner contour of the sleeve 5 may, for instance, be circular (Fig. 5), hexagonal or octagonal (Fig. 6), depending on the appearance of the tool 2.
  • the external dimensions of the inner sleeve 5 are preferably the same, irrespective of its internal shape. This enables the same outer sleeve to be used for inner sleeves having different internal shape.
  • the inner sleeve 5 also includes two axially running grooves 7.
  • the elastomeric outer sleeve 4 is provided with a substantially circular shoulder 8, 9 at each end.
  • the distance between these shoulders 8, 9 corresponds to approximately the length of the inner sleeve 5.
  • Ribs 10, 11 distributed uniformly around the circumference, extend between the two shoulders 8, 9 of the outer sleeve 4.
  • Two ribs 11 located diametrically opposite each other are slightly larger than the other ribs 10, i.e. they protrude further in radial direction.
  • the outer sleeve 4 is passed over the inner sleeve 5 after the latter has been applied on the tool 2, with the inner sleeve 5 between the shoulders 8, 9 of the outer sleeve 4, thus positioning the inner sleeve 5 in axial direction with respect to the outer sleeve 4. At the same time it should be ensured that the larger ribs 11 fit into the axial grooves 7, thus locking the inner sleeve 5 against turning in the outer sleeve 4.
  • the ribs 10, 11 of the outer sleeve 4 abut the outer surface of the inner sleeve 5, air-filled gaps 12 being formed between the ribs 10, 11 and between the inner and outer sleeves. The distance between the shoulders 8, 9 on the outer sleeve is thus such that the air-gaps 12 are sealed thereby.
  • the outer sleeve 4 consists of a solid part with protrusions to form cylindrical radial zones with different flexibility.
  • the protrusions shown in the drawings as straight, axial ribs may thus consist of helical ribs, studs or annular collars around the circumference, etc.
  • the outer sleeve may also be composed of several layers of material having different degrees of hardness. In this case the outer layer should preferably be made of harder material than the outer layers.
  • the path of movement of the vibration-absorbing handle 3 is limited by bosses 13 protruding radially from the chisel 2 on each side of the handle.
  • the handle 3 is thus prevented from slipping off the tool when not in use.
  • This limitation of movement can of course be achieved in other ways. Movement may be curtailed, for instance, by collars encircling or partially encircling the chisel 2. It may even be sufficient to arrange special devices to curtail movement in the form of bosses or collars along only one side of the chisel.
  • the collars or bosses are produced by normal workshop methods, such as forging.
EP86850220A 1985-06-19 1986-06-17 A vibration-absorbing handle Expired EP0207034B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86850220T ATE47072T1 (de) 1985-06-19 1986-06-17 Schwingungen absorbierender griff.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8503053 1985-06-19
SE8503053A SE452426B (sv) 1985-06-19 1985-06-19 Vibrationsdempande handtag

Publications (2)

Publication Number Publication Date
EP0207034A1 EP0207034A1 (en) 1986-12-30
EP0207034B1 true EP0207034B1 (en) 1989-10-11

Family

ID=20360637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86850220A Expired EP0207034B1 (en) 1985-06-19 1986-06-17 A vibration-absorbing handle

Country Status (5)

Country Link
EP (1) EP0207034B1 (sv)
JP (1) JPS6254682A (sv)
AT (1) ATE47072T1 (sv)
DE (1) DE3666170D1 (sv)
SE (2) SE452426B (sv)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE460266B (sv) * 1986-05-12 1989-09-25 Eskil Sundstroem Vibrationsskydd vid ett motordrivet vibrationsalstrande handredskap
US4825548A (en) * 1987-03-31 1989-05-02 White Consolidated Industries, Inc. Vibration-damping control handle for a portable power tool
JPH0720078Y2 (ja) * 1988-07-15 1995-05-10 麒麟麦酒株式会社 生ビ−ル注出装置
DE8716386U1 (sv) * 1987-10-17 1988-02-11 Weha-Ludwig Werwein Gmbh, 8901 Koenigsbrunn, De
US5839517A (en) * 1993-01-27 1998-11-24 Lord Corporation Vibration isolator for hand-held vibrating devices
WO1994016864A1 (en) * 1993-01-27 1994-08-04 Lord Corporation Vibration isolator for hand-held vibrating devices
KR19980702910A (ko) * 1996-01-11 1998-09-05 윌리엄 엠. 토마스 공압공구 및 이것을 위한 진공격리기의 장착부
US5813477A (en) * 1996-05-23 1998-09-29 Chicago Pneumatic Tool Company Vibration-reduced impact tool and vibration isolator therefor
TR200000989T2 (tr) * 1997-08-05 2002-06-21 Hispaes, S.L. Titreşimlerin azaltıldığı ve taşıyıcı için emniyetli, taşınabilir zırai amaçlı makine.
EP1138445A1 (en) * 2000-03-28 2001-10-04 Nicola Buonora Hand-grip sliding on a rod to operate a tool mounted at the end of the rod
JP4624418B2 (ja) * 2004-08-26 2011-02-02 フォン、アークス、アクチェンゲゼルシャフト ニードル銃
EP2161106A1 (en) * 2008-09-07 2010-03-10 Josef Kihlberg AB Fastener driving tool with a handle portion
WO2020260279A1 (en) * 2019-06-27 2020-12-30 Atlas Copco Industrial Technique Ab Hand held power tool

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR933451A (fr) * 1946-08-28 1948-04-22 Perfectionnements aux poignées de cycles et motocycles
US3344684A (en) * 1965-10-05 1967-10-03 Steere Entpr Inc Grip
USRE29402E (en) * 1974-05-15 1977-09-20 Caterpillar Tractor Co. Vibration isolating grip for pneumatic hand tools
SE8107011L (sv) * 1980-12-11 1982-06-12 Seiko Giken Kk Vibrationsdempare

Also Published As

Publication number Publication date
SE8503053L (sv) 1986-12-20
SE452426B (sv) 1987-11-30
SE8503053D0 (sv) 1985-06-19
SE8700128D0 (sv) 1987-01-15
EP0207034A1 (en) 1986-12-30
SE460888B (sv) 1989-12-04
DE3666170D1 (en) 1989-11-16
ATE47072T1 (de) 1989-10-15
JPS6254682A (ja) 1987-03-10
SE8700128L (sv) 1987-01-15

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