USH1811H - Apparatus and method for reducing low frequency vibrations in power tools - Google Patents
Apparatus and method for reducing low frequency vibrations in power tools Download PDFInfo
- Publication number
- USH1811H USH1811H US08/996,588 US99658897A USH1811H US H1811 H USH1811 H US H1811H US 99658897 A US99658897 A US 99658897A US H1811 H USH1811 H US H1811H
- Authority
- US
- United States
- Prior art keywords
- handle
- bladder
- low frequency
- handle portion
- frequency vibrations
- 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.)
- Abandoned
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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
- B25D17/043—Handles resiliently mounted relative to the hammer housing
Definitions
- This invention relates generally to power tools and, more particularly, to apparatus and methods for reducing low frequency vibrations in power tools.
- the object of this invention is met by providing a dual-density bladder between a first and a second handle portion. By disposing such bladder accordingly, the second handle portion is effectively isolated from the first handle portion, thus reducing the low frequency vibrations transmitted to the second handle portion.
- the object of this invention is met by providing a dual-density bladder between a handle portion and a main housing portion.
- FIG. 1 is a partial side view of a power tool handle having a first embodiment of the present invention
- FIG. 2 is a partial cross-sectional side view of the first embodiment along the circle shown in broken lines of FIG. 1;
- FIG. 3 is a partial cross-sectional side view of a power tool handle having a second embodiment of the present invention.
- a preferred handle 10 of a power tool is provided with a rear portion 11 attached to the main portion 15 via a plurality of screws 12.
- a dual-density bladder 13 is interposed between the rear portion 11 and the main portion 15.
- the bladder 13 is disposed wherever a screw 12 couples the rear portion 11 with the main portion 15.
- the bladder 13 may be constructed from a relatively firm, air-tight material, such as solid rubber, plastic, elastomeric material, etc.
- the bladder 13 includes a chamber 20, which is in turn filled with a gas, fluid, or solid having a different density than the bladder material.
- the bladder 13 may contain air, pressurized air, rheopexic fluid, foam, etc.
- the bladder 13 can include a plurality of cavities or cells, instead of a single chamber. Similarly, a person skilled in the art will recognize that different materials can be used for constructing and/or filling the bladder 13.
- a gap 14 is created by interposing the bladder 13 between the rear portion 11 and the main portion 15. Accordingly, the dual-density bladder 13 in effect isolates the rear portion 11, reducing the low frequency vibrations transmitted to the rear portion 11.
- a larger bladder 13a can be disposed within the hollow portion of the handle, creating a gap 14 between the rear portion 11 and the main portion 15.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussion Or Vibration Massage (AREA)
Abstract
A power tool having a low frequency reduction apparatus includes a first handle portion, a second handle portion, and a dual-density bladder disposed between the first and second handle portions. By disposing such bladder accordingly, the second handle portion is effectively isolated from the first handle portion, thus reducing the low frequency vibrations transmitted to the second handle portion. Preferably, a gap is formed between the first and second handle portions. In another embodiment of the invention, a dual-density bladder between a handle portion and a main housing portion of the power tool.
Description
This invention relates generally to power tools and, more particularly, to apparatus and methods for reducing low frequency vibrations in power tools.
Many individuals are exposed to hand-induced vibrations by using hand-held vibrating or repeated impact-type power tools that include, but are not limited to, chipping hammers, jackhammers, riveters, jackleg drills, rotary grinders and sanders, orbital sanders, chain saws, lawn mowers, hammer drills, and string trimmers. These vibration levels can be reduced by redesigning the tool or object or by placing a vibration isolation device between the hand and the tool or object that is being clasped by the hand. For example, prior art solutions include providing a rubber layer on the tool handle. However, such solutions are not completely satisfactory as they do not reduce low frequency vibrations, i.e., vibrations having frequencies lower than 120 Hertz.
Accordingly, it is the object of the present invention to provide a method and apparatus for reducing low frequency vibrations in power tools.
The object of this invention is met by providing a dual-density bladder between a first and a second handle portion. By disposing such bladder accordingly, the second handle portion is effectively isolated from the first handle portion, thus reducing the low frequency vibrations transmitted to the second handle portion.
Similarly, the object of this invention is met by providing a dual-density bladder between a handle portion and a main housing portion.
Additional features and benefits of the present invention are described, and will be apparent from, the accompanying drawings and the detailed description below.
The accompanying drawings illustrate preferred embodiments of the invention according to the practical application of the principles thereof, and in which:
FIG. 1 is a partial side view of a power tool handle having a first embodiment of the present invention;
FIG. 2 is a partial cross-sectional side view of the first embodiment along the circle shown in broken lines of FIG. 1; and
FIG. 3 is a partial cross-sectional side view of a power tool handle having a second embodiment of the present invention.
The invention is now described with reference to the accompanying figures, wherein like numerals designate like parts. Referring to FIG. 1, a preferred handle 10 of a power tool is provided with a rear portion 11 attached to the main portion 15 via a plurality of screws 12.
Referring to FIG. 2, a dual-density bladder 13 is interposed between the rear portion 11 and the main portion 15. Preferably, the bladder 13 is disposed wherever a screw 12 couples the rear portion 11 with the main portion 15.
Further, the bladder 13 may be constructed from a relatively firm, air-tight material, such as solid rubber, plastic, elastomeric material, etc. In addition, the bladder 13 includes a chamber 20, which is in turn filled with a gas, fluid, or solid having a different density than the bladder material. For example, the bladder 13 may contain air, pressurized air, rheopexic fluid, foam, etc.
A person skilled in the art will recognize that the bladder 13 can include a plurality of cavities or cells, instead of a single chamber. Similarly, a person skilled in the art will recognize that different materials can be used for constructing and/or filling the bladder 13.
Referring to FIG. 2, a gap 14 is created by interposing the bladder 13 between the rear portion 11 and the main portion 15. Accordingly, the dual-density bladder 13 in effect isolates the rear portion 11, reducing the low frequency vibrations transmitted to the rear portion 11.
Similarly, referring to FIG. 3, a larger bladder 13a can be disposed within the hollow portion of the handle, creating a gap 14 between the rear portion 11 and the main portion 15.
Persons skilled in the art may recognize other comfort features that can be added to the embodiments described above, such as providing the handle with an outer rubber layer or gas- or fluid-filled layer. Similarly, persons skilled in the art may recognize other alternatives to the means disclosed herein, such as placing the bladders so that the entire handle is isolated from the power tool. However, all these additions and/or alterations are considered to be equivalents of the present invention.
Claims (4)
1. A power tool comprising:
a first handle portion,
a second handle portion, and
a dual-density bladder disposed between the first and second handle portions.
2. The power tool of claim 1, wherein a gap is formed between the first and second handle portions.
3. A power tool comprising:
a handle portion,
a main housing portion, and
a dual-density bladder disposed between the handle portion and the main housing portion.
4. The power tool of claim 3, wherein a gap is formed between the first and second handle portions.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/996,588 USH1811H (en) | 1997-12-16 | 1997-12-16 | Apparatus and method for reducing low frequency vibrations in power tools |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/996,588 USH1811H (en) | 1997-12-16 | 1997-12-16 | Apparatus and method for reducing low frequency vibrations in power tools |
Publications (1)
Publication Number | Publication Date |
---|---|
USH1811H true USH1811H (en) | 1999-11-02 |
Family
ID=25543090
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/996,588 Abandoned USH1811H (en) | 1997-12-16 | 1997-12-16 | Apparatus and method for reducing low frequency vibrations in power tools |
Country Status (1)
Country | Link |
---|---|
US (1) | USH1811H (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050284646A1 (en) * | 2004-06-04 | 2005-12-29 | Dorin Bacila | Vibration reduction apparatus for power tool and power tool incorporating such apparatus |
US20060011365A1 (en) * | 2003-11-04 | 2006-01-19 | Michael Stirm | Vibration reduction apparatus for power tool and power tool incorporating such apparatus |
US20060185868A1 (en) * | 2005-02-24 | 2006-08-24 | Reimund Becht | Handle assembly for hammer apparatus |
US20070056757A1 (en) * | 2003-11-04 | 2007-03-15 | Michael Stirm | Vibration reduction apparatus for power tool and power tool incorporating such apparatus |
US20070295522A1 (en) * | 2006-06-16 | 2007-12-27 | Ulrich Bohne | Hand power tool |
US20070295521A1 (en) * | 2006-06-16 | 2007-12-27 | Juergen Wiker | Hand power tool |
US20080000664A1 (en) * | 2004-08-26 | 2008-01-03 | Hubert Steinke | Hand-Held Power Tool Handle Device With a Vibration-Shielding Unit |
US7320369B2 (en) | 2003-11-04 | 2008-01-22 | Black & Decker Inc. | Vibration reduction apparatus for power tool and power tool incorporating such apparatus |
US20100263896A1 (en) * | 2007-12-13 | 2010-10-21 | Jens Brennenstuhl | Hand-held power tool having a two-part housing |
EP2082847A3 (en) * | 2008-01-24 | 2011-09-21 | Black & Decker, Inc. | Handle for power tool |
US20120111595A1 (en) * | 2009-05-11 | 2012-05-10 | Robert Bosch Gmbh | Hand-Held Power Tool, In Particular Electric Hand-Held Power Tool |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US578020A (en) * | 1897-03-02 | Handle for pneumatic tools | ||
US3525373A (en) * | 1966-12-10 | 1970-08-25 | Kyoritsu Noki Co Ltd | Chain saw |
US3968843A (en) * | 1975-02-21 | 1976-07-13 | Caterpillar Tractor Co. | Pneumatic percussion tool having a vibration dampened handle |
US4800965A (en) * | 1984-03-23 | 1989-01-31 | Metabowerke Gmbh & Co. | Damping element, and its installation in a motor-driven hand tool |
US5027910A (en) * | 1990-05-02 | 1991-07-02 | Honsa Ergonomic Technologies, Inc. | Vibration-isolated rotary tool |
US5692574A (en) * | 1994-07-12 | 1997-12-02 | Makita Corporation | Vibrating tool and a vibration isolating ring |
US5697456A (en) * | 1995-04-10 | 1997-12-16 | Milwaukee Electric Tool Corp. | Power tool with vibration isolated handle |
-
1997
- 1997-12-16 US US08/996,588 patent/USH1811H/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US578020A (en) * | 1897-03-02 | Handle for pneumatic tools | ||
US3525373A (en) * | 1966-12-10 | 1970-08-25 | Kyoritsu Noki Co Ltd | Chain saw |
US3968843A (en) * | 1975-02-21 | 1976-07-13 | Caterpillar Tractor Co. | Pneumatic percussion tool having a vibration dampened handle |
US4800965A (en) * | 1984-03-23 | 1989-01-31 | Metabowerke Gmbh & Co. | Damping element, and its installation in a motor-driven hand tool |
US5027910A (en) * | 1990-05-02 | 1991-07-02 | Honsa Ergonomic Technologies, Inc. | Vibration-isolated rotary tool |
US5692574A (en) * | 1994-07-12 | 1997-12-02 | Makita Corporation | Vibrating tool and a vibration isolating ring |
US5697456A (en) * | 1995-04-10 | 1997-12-16 | Milwaukee Electric Tool Corp. | Power tool with vibration isolated handle |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7762348B2 (en) | 2003-11-04 | 2010-07-27 | Black & Decker Inc. | Vibration reduction apparatus for power tool and power tool incorporating such apparatus |
US20060011365A1 (en) * | 2003-11-04 | 2006-01-19 | Michael Stirm | Vibration reduction apparatus for power tool and power tool incorporating such apparatus |
US7320369B2 (en) | 2003-11-04 | 2008-01-22 | Black & Decker Inc. | Vibration reduction apparatus for power tool and power tool incorporating such apparatus |
US20070056757A1 (en) * | 2003-11-04 | 2007-03-15 | Michael Stirm | Vibration reduction apparatus for power tool and power tool incorporating such apparatus |
US7472760B2 (en) | 2003-11-04 | 2009-01-06 | Black & Decker Inc. | Vibration reduction apparatus for power tool and power tool incorporating such apparatus |
US7322428B2 (en) | 2004-06-04 | 2008-01-29 | Black & Decker Inc. | Vibration reduction apparatus for power tool and power tool incorporating such apparatus |
US20050284646A1 (en) * | 2004-06-04 | 2005-12-29 | Dorin Bacila | Vibration reduction apparatus for power tool and power tool incorporating such apparatus |
US20080000664A1 (en) * | 2004-08-26 | 2008-01-03 | Hubert Steinke | Hand-Held Power Tool Handle Device With a Vibration-Shielding Unit |
US20060185868A1 (en) * | 2005-02-24 | 2006-08-24 | Reimund Becht | Handle assembly for hammer apparatus |
US20070295522A1 (en) * | 2006-06-16 | 2007-12-27 | Ulrich Bohne | Hand power tool |
US20070295521A1 (en) * | 2006-06-16 | 2007-12-27 | Juergen Wiker | Hand power tool |
GB2439434B (en) * | 2006-06-16 | 2009-06-03 | Bosch Gmbh Robert | Hand tool machine |
GB2439434A (en) * | 2006-06-16 | 2007-12-27 | Bosch Gmbh Robert | Hand machine tool wih damping |
US20100263896A1 (en) * | 2007-12-13 | 2010-10-21 | Jens Brennenstuhl | Hand-held power tool having a two-part housing |
EP2082847A3 (en) * | 2008-01-24 | 2011-09-21 | Black & Decker, Inc. | Handle for power tool |
US20120111595A1 (en) * | 2009-05-11 | 2012-05-10 | Robert Bosch Gmbh | Hand-Held Power Tool, In Particular Electric Hand-Held Power Tool |
US9168652B2 (en) * | 2009-05-11 | 2015-10-27 | Robert Bosch Gmbh | Hand-held power tool, in particular electric hand-held power tool |
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Legal Events
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Free format text: DEFENSIVE PUBLICATION OR SIR FILE |