EP0207034B1 - A vibration-absorbing handle - Google Patents
A vibration-absorbing handle Download PDFInfo
- 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
Links
Images
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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
- 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.
- One embodiment of the invention is described in more detail in the following with reference to the accompanying drawings in which
- Figure I shows, partially in longitudinal section, a chisel hammer with a handle according to the invention arranged on the chisel,
- Figure 2 shows a longitudinal section of a handle according to the invention,
- Figure 3 shows a cross section along the line III - III in Figure 2,
- Figure 4 shows a lateral view of an inner sleeve included in the handle shown in Figure 2,
- Figure 5 shows the inner sleeve in Figure 4, seen from the front,
- Figure 6 shows a modification of the inner sleeve shown in Figure 4, seen from the front,
- Figure 7 shows a simplified view of a longitudinal section through an outer sleeve forming a part of the handle shown in Figure 1, and
- Figure 8 shows a section along the line VIII - VIII in Figure 7.
- In the embodiment shown in Figure 1 a vibration-
absorbing handle 3 according to the invention is applied on achisel 2 arranged in a chisel-hammer 1. - The
handle 3 is composed of two main parts: an outer sleeve 4 and aninner 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. - In the embodiment shown, see Figure 4 through Figure 6, the
inner sleeve 5 consists of twohalves tool 2. Thesleeve halves joint 6 to form a sleeve surrounding thetool 2. The shape of theinner sleeve 5 closely follows the contours of thetool 2. The inner contour of thesleeve 5 may, for instance, be circular (Fig. 5), hexagonal or octagonal (Fig. 6), depending on the appearance of thetool 2. However, the external dimensions of theinner 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. Theinner sleeve 5 also includes two axially runninggrooves 7. - The elastomeric outer sleeve 4 is provided with a substantially
circular shoulder 8, 9 at each end. The distance between theseshoulders 8, 9 corresponds to approximately the length of theinner sleeve 5.Ribs shoulders 8, 9 of the outer sleeve 4. Tworibs 11 located diametrically opposite each other are slightly larger than theother 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 thetool 2, with theinner sleeve 5 between theshoulders 8, 9 of the outer sleeve 4, thus positioning theinner sleeve 5 in axial direction with respect to the outer sleeve 4. At the same time it should be ensured that thelarger ribs 11 fit into theaxial grooves 7, thus locking theinner sleeve 5 against turning in the outer sleeve 4. When assembled, theribs inner sleeve 5, air-filledgaps 12 being formed between theribs shoulders 8, 9 on the outer sleeve is thus such that the air-gaps 12 are sealed thereby. - Since the solid portion of the outer sleeve 4 is spaced from the
inne sleeve 5 by theribs gaps 12 are sealed at the ends since the air enclosed therein will also act as shock-absorber. - In the embodiment shown the outer sleeve 4 consists of a solid part with protrusions to form cylindrical radial zones with different flexibility. However, the invention also covers other designs. The protrusions shown in the drawings as straight, axial ribs may thus consist of helical ribs, studs or annular collars around the circumference, etc. To achieve cylindrical radial zones with different flexibility, thus giving the handle the desired spring and absorbing properties, 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.
- In the embodiment shown in Figure 1 the path of movement of the vibration-absorbing
handle 3 is limited bybosses 13 protruding radially from thechisel 2 on each side of the handle. Thehandle 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 thechisel 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.
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86850220T ATE47072T1 (en) | 1985-06-19 | 1986-06-17 | VIBRATION ABSORBING GRIP. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8503053 | 1985-06-19 | ||
SE8503053A SE452426B (en) | 1985-06-19 | 1985-06-19 | VIBRATION DUMPING HANDLE |
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 (en) |
JP (1) | JPS6254682A (en) |
AT (1) | ATE47072T1 (en) |
DE (1) | DE3666170D1 (en) |
SE (2) | SE452426B (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE460266B (en) * | 1986-05-12 | 1989-09-25 | Eskil Sundstroem | VIBRATION PROTECTION IN AN ENGINE-DRIVEN VIBRATION DRIVE HAND TOOL |
US4825548A (en) * | 1987-03-31 | 1989-05-02 | White Consolidated Industries, Inc. | Vibration-damping control handle for a portable power tool |
JPH0720078Y2 (en) * | 1988-07-15 | 1995-05-10 | 麒麟麦酒株式会社 | Raw beer pouring device |
DE8716386U1 (en) * | 1987-10-17 | 1988-02-11 | Weha-Ludwig Werwein GmbH, 8901 Königsbrunn | Pneumatically operated chisel hammer |
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 (en) * | 1996-01-11 | 1998-09-05 | 윌리엄 엠. 토마스 | Pneumatic tool and mounting part of vacuum isolator for it |
US5813477A (en) * | 1996-05-23 | 1998-09-29 | Chicago Pneumatic Tool Company | Vibration-reduced impact tool and vibration isolator therefor |
DE69808662T3 (en) * | 1997-08-05 | 2006-11-30 | Hispaes, S.L. | PORTABLE AGRICULTURAL MACHINE WITH VIBRATION DAMPING AND PROTECTION FOR THE OPERATOR |
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 |
CN101052479B (en) * | 2004-08-26 | 2011-02-16 | 沃恩阿克斯公开股份有限公司 | Nail gun |
EP2161106A1 (en) * | 2008-09-07 | 2010-03-10 | Josef Kihlberg AB | Fastener driving tool with a handle portion |
CN114007810B (en) * | 2019-06-27 | 2023-10-31 | 阿特拉斯·科普柯工业技术公司 | Hand-held power tool |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR933451A (en) * | 1946-08-28 | 1948-04-22 | Improvements to the handles of cycles and motorcycles | |
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 (en) * | 1980-12-11 | 1982-06-12 | Seiko Giken Kk | VIBRATIONSDEMPARE |
-
1985
- 1985-06-19 SE SE8503053A patent/SE452426B/en not_active IP Right Cessation
-
1986
- 1986-06-17 EP EP86850220A patent/EP0207034B1/en not_active Expired
- 1986-06-17 DE DE8686850220T patent/DE3666170D1/en not_active Expired
- 1986-06-17 AT AT86850220T patent/ATE47072T1/en active
- 1986-06-18 JP JP61140415A patent/JPS6254682A/en active Pending
-
1987
- 1987-01-15 SE SE8700128A patent/SE460888B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE8503053L (en) | 1986-12-20 |
JPS6254682A (en) | 1987-03-10 |
SE8700128D0 (en) | 1987-01-15 |
ATE47072T1 (en) | 1989-10-15 |
EP0207034A1 (en) | 1986-12-30 |
SE452426B (en) | 1987-11-30 |
SE8700128L (en) | 1987-01-15 |
DE3666170D1 (en) | 1989-11-16 |
SE460888B (en) | 1989-12-04 |
SE8503053D0 (en) | 1985-06-19 |
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