U.S. patent application number 09/847793 was filed with the patent office on 2001-12-20 for hand-held tool with a dust collector.
Invention is credited to Frenzel, Jens, Nussrainer, Helmut.
Application Number | 20010052429 09/847793 |
Document ID | / |
Family ID | 7641318 |
Filed Date | 2001-12-20 |
United States Patent
Application |
20010052429 |
Kind Code |
A1 |
Frenzel, Jens ; et
al. |
December 20, 2001 |
Hand-held tool with a dust collector
Abstract
A hand-held tool including a housing, a rod-shaped stop secured
on the housing and a dust collector (3) having a dust screen (4)
for at least partially circumferentially surrounding a working tool
(2) insertable into tool, a deflection-resistant, axially
resiliently displaceable at a radial distance from a tool axis (A),
suction conduit (6), and guide and connection elements (7) for
securing the dust collector (3) on the depth stop (9).
Inventors: |
Frenzel, Jens; (Landsberg,
DE) ; Nussrainer, Helmut; (Isen, DE) |
Correspondence
Address: |
David Toren
BROWN & WOOD LLP
One World Trade Center
New York
NY
10048-0557
US
|
Family ID: |
7641318 |
Appl. No.: |
09/847793 |
Filed: |
May 2, 2001 |
Current U.S.
Class: |
175/210 ;
175/213; 175/220 |
Current CPC
Class: |
B23Q 11/0046
20130101 |
Class at
Publication: |
175/210 ;
175/213; 175/220 |
International
Class: |
E21B 021/015 |
Foreign Application Data
Date |
Code |
Application Number |
May 9, 2000 |
DE |
100 22 582.9 |
Claims
What is claimed is:
1. A hand-held tool, comprising a housing; a rod-shaped depth stop
(9) secured on the housing; and a dust collector (3) having a dust
screen (4) for at least partially circumferentially surrounding a
working tool (2) insertable into the hand-held tool, a
deflection-resistant, axially resiliently displaceable at a radial
distance from a tool axis (A), suction conduit (6), and guide and
connection means (7) for securing the dust collector (3) on the
depth stop (9).
2. A hand-held tool according to claim 1, wherein the guide and
connection menas (7) includes clamping means (8).
3. A hand-held tool according to claim 1, further comprising a
clamp block (10) for securing the depth stop (9) on the tool
housing.
4. A hand-held tool according to claim 3, wherein the tool housing
has a flange (13) provided adjacent to a tool chuck (12) and on
which the clamp block (10) is secured.
5. A hand-held tool according to claim 3, wherein the clamp block
has a handle (11).
6. A hand-held tool according to claim 3, wherein the dust
collector (3) is secured on one of a side of the clamp block (10)
adjacent to the chuck (12) and a side of the clamp block (10)
remote from the chuck (12).
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a hand-held tool axially
displaceable for abrasive removal of material and, in particular,
to an electrically driven drilling and/or chiseling tool for
working stone or stone-like material and including a dust collector
with suction properties for removing the abrasively removable
material.
[0003] 2. Description of the Prior Art
[0004] German Publication DE 43 21 906 discloses a drilling tool
with a dust collector located beneath the tool and connected
therewith by a resilient bellows. The dust collector sealingly
abuts a wall of a constructional component, in which a hole is
being made, and collects the removable abrasive material.
[0005] German Publication DE 94 11 587 discloses the use of a
resilient bellows that sealingly surrounds a working tool, is
arranged between a wall of a constructional component and the
drilling tool housing, and is connected with vacuum-generating
suction means. U.S. Pat. No. 5,688,082 discloses a drilling tool in
which the bellows, which surrounds the working took, is secured, in
the vicinity of a drilling tool chuck for receiving the working
tool, to a cylindrical flange provided on the drilling tool. For
securing the bellows to the flange, a damping block is provided. A
rod, which is connected to the wall-side bellows ring, slides in a
bore provided in the clamp block, with a dog provided on the rod
serving as a depth stop.
[0006] A common drawback of the dust collectors, bellows, which
sealingly surround the working tool consists in a very poor
visibility of the working tool which is surrounded by a such,
mostly transparent dust collector which also prevents an immediate
access to the working tool or the chuck.
[0007] German Publication DE 195 43 599 discloses a separate,
wall-abutting dust collector with free, i.e., not arranged in a
sealed space, suction openings which at least partially
circumscribes the working tool. The drawback of such dust
collectors consists in that they need be held on a wall with a free
hand of the drilling tool user.
[0008] EP-O-456 598 discloses a dust collector that includes a
deflection-resistant, axially resiliently movable, nib-shaped,
suction conduit displaceable along the working tool axis and
secured to a clamp block with an additional manual handle. The
drawback of this dust collector consists in its limited use, as it
can be used for a limited range of bore lengths because it has
limited deflection resistance and path of movement.
[0009] U.S. Pat. No. 4,064,952 disclose a dust collector that
circumferentially surrounds the working tool, is located radially
outwardly, and is displaceably connected to the drilling tool
housing. Through the opening, which surrounds the working tool in
the wall vicinity, a compressed air is supplied from the drilling
tool and delivers the removed material into the dust collector. The
opposite end of the duct collector is connected with a
vacuum-producing suction means. This dust collector has a rather
complicated structure and, because it requires the use of special
attachment means, cannot be used with different types of drilling
tools.
[0010] U.S. Pat. No. 3,779,663 discloses a bar-shaped depth stop
which is connected with a drilling tool and extends sidewise
therefrom parallel thereto.
[0011] German Publication DE 296 056 221 discloses attachment of
bar- or rod-shaped elements to drilling tools with locking clamp
blocks. The bar or rod-shaped elements are secured on mostly
standartized cylindrical flanges in vicinity of working tool
chucks.
[0012] German Publication 196 06 498 discloses attachment to such
cylindrical flanges, which can be rotated about the working tool
axis and secured in different angular positions, of a depth stop
together with an additional handle.
[0013] An object of the present invention is to provide a dust
collector in which the drawbacks of the prior art dust collectors
would be eliminated.
[0014] Another object of the present invention is to provide a dust
collector which would not obscure the view of the working tool and
would not interfere with the working tool handling.
[0015] A further object of the present invention is to provide a
dust collector that can be used with a variety of drilling or the
like tools.
SUMMARY OF THE INVENTION
[0016] This and other objects of the present invention, which will
become apparent hereinafter are achieved by providing a hand-held
tool, e.g., drilling and/or chiseling tool including a housing, a
bar or rod-shaped depth stop secured on the housing, and a dust
collector having a dust screen for at least partially
circumferentially surrounding a working tool insertable into the
hand-held tool.
[0017] The dust collector further includes a deflection-resistant,
axially resiliently displaceable at a radial distance from a tool
axis, suction conduit, and guide and connection elements for
securing the dust collector on the depth stop.
[0018] According to the present invention, an open dust collector,
which at least partially surrounds the working tool, includes a
deflection-resistant, axially resiliently movable, nib-shaped
suction conduit. The suction conduit is radially spaced from the
working tool and is displaceable parallel to the working tool axis.
The dust collector is secured on a substantially standartized, rod
or bar-shaped depth stop. The depth stop, in turn, is secured on a
clamp block provided with a handle, e.g., with a tightening strap.
The clamp is secured, in the vicinity of a chuck for receiving the
working tool, advantageously, on a cylindrical flange provided on
hand-held tool housing. To this end, the dust collector includes
guide and connecting means provided on a side of the suction
conduit. The guide and connection means provides for securing of
the dust collector on the depth stop with a possibility of
displacement, advantageously, parallel to the working tool axis.
The guide and connection means includes, advantageously,
cylindrical or prismatic recesses which partially or completely
surround the depth stop and insure a formlocking displacement of
the dust collector along the depth stop. With the use of
appropriate locking means, e.g., a hand screw, the dust collector
can be secured on the depth stop in desired longitudinal and/or
angular, continuous or discrete positions.
[0019] The possibility to adjust the overhang of the depth stop
with respect to the clamp block and the possibility to arbitrary
select the position of the dust collector in front of or behind the
clamp block provide for a wide range of possible positions of the
dust collector along the working tool axis. A longitudinal
flexibiliaty of the suction conduit of the dust collector, i.e.,
varying of its length is insured by forming the suction conduit,
advantageously, of engaging in each other, spring-biased with
respect to each other, telescopic tubes. The foregoing structure of
the suction conduit insures shortening of the suction conduit with
the immersion of the working tool into the removal material, i.e.,
into a wall of a construction component in which, e.g., a bore is
drilled.
[0020] Advantageously, the center of the open openings for suction
of the removable material lies, with an appropriate attachment of
the suction conduit and the dust collector, substantially on the
working tool axis. The center advantageously lies within the plane
of the axis of the guide and connection means and is radially
spaced from the axis of the guide and connection means by a
distance that corresponds to the distance the center of the
attachment opening in the clamp block for the depth stop is spaced
from the working tool axis. This insures maintaining of a
predetermined position of the dust collector relative to the
working tool axis. Naturally, by selecting the size of the suction
opening, the difference in the radial positions of the dust
collector with respect to the working tool axis for different
hand-held tools and their clamp blocks can be compensated.
[0021] Due to the standardization of the cylindrical flanges, the
clamp block can be secured in a mirrow position, whereby a
left-hand positioning of the dust collector is possible.
[0022] The novel features of the present invention, which are
considered as characteristic for the invention, are set forth in
the appended claims. The invention itself, however, both as to its
construction and its mode of operation, together with additional
advantages and objects thereof, will be best understood from the
following detailed description of preferred embodiments, when read
with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The drawings show:
[0024] FIG. 1 a side view of a hand-held tool with dust collector
according to the present invention with the tool operating with a
elongate working tool; and
[0025] FIG. 2 a side view of a hand-held tool with a dust collector
according to the present invention with the tool operating with a
short working tool.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0026] A hand-held tool 1, which is shown in FIG. 1, includes a
dust collector 3, which is secured to the tool housing and extends
parallel to the tool axis A along which a working tool 2 extends.
The dust collector 3 includes a dust screen 4 which abuts,
advantageously, sealingly, a surface 5. The dust screen 4 at least
partially circumferentially surrounds the working tool 2. The dust
collector 3 includes a deflection-resistant, axially resiliently
movable, suction conduit 6.
[0027] The suction conduit 6 is radially spaced from the axis A of
the tool and is advantageously formed of axially spring-supported
telescopic tubes. The dust collector 3, together with the suction
conduit 6, is fixedly secured on a standard, rod-shaped, depth stop
9 having a diameter from 5 to 8 mm. The dust collector 3 is secured
on the depth stop 9 with guide and connecting means 7 displaceable
along the depth stop 9 and having clamping means 8 shaped as a hand
screw. The depth stop 9, which is secured on the tool housing and
is displaceable parallel to the tool axis A, is secured on a
substantially cylindrical flange 13 provided on the housing
adjacent to a working tool chuck 12. For securing the depth stop 9
on the flange 13, there is provided a damp block 10 with a handle
11. With a short working tool 2, the dust collector 3 is secured on
the depth stop 9 on a side of the clamp block 10 remote from the
working tool 2, as shown in FIG. 1.
[0028] In FIG. 2, the dust collector 3 is shown as being secured on
the depth stop 9 on a side of the clamp block 10 adjacent to the
working tool 2. The depth stop 9 is securable on the side of the
clamp block 10 adjacent to the working tool 2 when an elongate
working tool 2 is used.
[0029] Though the present invention was shown and described with
references to the preferred embodiments, such are merely
illustrative of the present invention and are not to be construed
as a limitation thereof, and various modifications of the present
invention will be apparent to those skilled in the art. It is,
therefore, not intended that the present invention be limited to
the disclosed embodiments or details thereof, and the present
invention includes all variations and/or alternative embodiments
within the spirit and scope of the present invention as defined by
the appended claims.
* * * * *