U.S. patent application number 10/337445 was filed with the patent office on 2003-09-04 for displacement and support device for a portable power tool.
Invention is credited to Gasser, Gerhard, Meisenbichler, Karl, Neuper, Karl, Richter, Martin.
Application Number | 20030164242 10/337445 |
Document ID | / |
Family ID | 7711597 |
Filed Date | 2003-09-04 |
United States Patent
Application |
20030164242 |
Kind Code |
A1 |
Richter, Martin ; et
al. |
September 4, 2003 |
Displacement and support device for a portable power tool
Abstract
A displacement and support device including a power cylinder (3)
provided at its opposite ends, respectively, with an assembly
element (7) for connecting the power cylinder with power tool and a
support leg, a control valve (10) for controlling operation of the
power cylinder (30), and a manually rotationally adjustable
actuation member (9) for actuating the control valve (10), with the
actuation member (9) being formed as a handle extending transverse
to an axis (A) of the power cylinder and rotationally adjustable
about a handle axis (B) within a rotational angle of 180.degree.
that encompasses an entire control region of the control valve
(10).
Inventors: |
Richter, Martin; (Freising,
DE) ; Gasser, Gerhard; (Rankweil, AT) ;
Meisenbichler, Karl; (Murzhofen, AT) ; Neuper,
Karl; (Rothis, AT) |
Correspondence
Address: |
SIDLEY AUSTIN BROWN & WOOD LLP
787 Seventh Avenue
New York
NY
10019
US
|
Family ID: |
7711597 |
Appl. No.: |
10/337445 |
Filed: |
January 7, 2003 |
Current U.S.
Class: |
173/32 |
Current CPC
Class: |
E21B 19/086
20130101 |
Class at
Publication: |
173/32 |
International
Class: |
E21B 019/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 7, 2002 |
DE |
102 00 309.2 |
Claims
What is claimed is:
1. A displacement and support device for a portable power tool,
comprising a fluid-operated power cylinder (3); assembly means (7)
provided at one end of the power cylinder (3) for connecting the
power cylinder (3) with the power tool (1); a support leg (8)
provided at another, opposite end of the power cylinder (3); a
control valve (10) for controlling operation of the power cylinder
(3); and a manually rotationally adjustable actuation member (9)
for actuating the control valve (10), the actuation member (9)
being formed as a handle extending transverse to an axis (A) of the
power cylinder and rotationally adjustable about a handle axis (B)
within a rotational angle of 180.degree. that encompasses an entire
control region of the control valve (10).
2. A displacement and support device according to claim 1, wherein
the handle-shaped actuation member (10) is rotationally adjustable
within a rotational angle of 90.degree. that encompass the entire
adjustable region of the control valve (10).
3. A displacement and support device according to claim 1, wherein
the control valve (10) is formed as a continuously adjustable
rotary valve.
4. A displacement and support device according to claim 1, wherein
the power cylinder (3) is formed as a double-action cylinder.
5. A displacement and support device according to claim 1, wherein
the assembly means (7) is formed as a partially torsion-free bolt
connection element extending transverse to the power tool axis
(A).
6. A displacement and support device according to claim 5, wherein
the bolt connection element projects sidewise on one side of the
one end of the power cylinder (3) and extends through an eyelet
provided on the power tool (1).
7. A displacement and support device according to claim 6, wherein
a fluid conduit is formed in an interior of the bolt connection
element and extends along a portion of a longitudinal extent
thereof.
8. A displacement and support device according to claim 1, wherein
the power cylinder (3) in hydraulically operated.
9. A displacement and support device according to claim 1, wherein
the support leg (8) is formed as an elongate member.
10. A displacement and support device according to claim 1,
comprising a claw member (14) securable with a cross-pin (13) for
connecting the support leg (8) with another end of the power
cylinder (3).
11. A displacement and support device according to claim 1,
comprising a stirrup-shaped handle (15) rotably and linearly
displaceably mountable on the power cylinder (3).
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a displacement and support
device for a portable power tool, in particular, a percussion power
tool, preferably, for forming shot holes during underground mining
works.
[0003] 2. Description of the Prior Art
[0004] Such portable power tools, which are driven hydraulically,
pneumatically, or electrically, weight about 15 kg and are usually
equipped with an elongate, water-flushed drill rod which is rotably
and axially displaceably, within narrow limits, secured in the
power tool and is provided at its free end with a drill bit made of
a hard material and having a diameter of about 35 mm.
[0005] German Patent DE 74833 discloses a portable electrical rock
power drill for drilling shot holes during underground mining works
and provided with an elongate water-flushed drilling rod with a
drill bit made of hard material, and a support device. The drill
rod displacement is effected with a hydraulic cylinder of which the
telescopic drill rod forms a part.
[0006] U.S. Pat. No. 4,000,873 discloses a portable power tool with
an easily mountable displacement and support device which is
supported on the ground and simultaneously applies a controlled
displacement force to the drill. For forming substantially
horizontal holes, the displacement and support device is inclined
rearwardly and downwardly.
[0007] U.S. Pat. No. 1,464,486 discloses a rotary-percussion power
tool having a one-leg support and a discretely controlled control
valve rotable about 360.degree.. A sensitive manual control of the
displacement and support device with such a valve is not
possible.
[0008] U.S. Pat. No. 1,151,261 discloses a fluid-driven percussion
power tool with an axially arranged, one-leg support that is formed
as a double-action cylinder and displacement of which is constantly
controlled by a radial, rotationally adjustable worm gear valve by
effecting several revolutions. For a manual control over the entire
control region of the displacement and support device, turning over
of the controlling head is necessary.
[0009] An object of the present invention is a displacement and
support device that can be comfortably controlled manually with one
hand over its entire control region.
SUMMARY OF THE INVENTION
[0010] This and other objects of the present invention, which will
become apparently hereinafter, are achieved by providing a
displacement and support device for a portable power tool and
including a fluid-operated power cylinder, assembly means provided
at one end of the power cylinder for connecting the power cylinder
with the power tool; a support leg provided at another, opposite
end of the power cylinder, a control valve for controlling
operation of the power cylinder, and a manually rotationally
adjustable actuation member for actuating the control valve, with
the actuation member being formed as a handle extending transverse
to an axis of the power cylinder and rotationally adjustable about
a handle axis within a rotational angle of 180.degree. and,
preferably, 90.degree. that encompasses the entire control region
of the control valve.
[0011] With the entire control region of the control valve being
within a rotational angle of the actuation member of 180.degree. or
90.degree., a comfortable control and fixation of the displacement
and support device becomes possible, without a need to turn the
controlling hand over and over again.
[0012] Advantageously, the continuously controlled control valve is
formed as a rotary valve, which makes possible to continuously
control, in a technological simple manner, the flow rate by
adjusting the rotary position of the valve.
[0013] Advantageously, the power cylinder is formed as a
double-action cylinder, which provides for an easy withdrawal of
the drill rod from the bore or hole.
[0014] Advantageously, the assembly means is formed as partially
torsion-free bolt connection element extending sidewise on outside
of the power cylinder and transverse to the drill axis and through
an eyelet provided on the power tool, securing the power cylinder
to the power tool. Within the bolt connection element, there is
provided a fluid conduit through which fluid, which is fed through
the pressure hose into the displacement and support device is fed
to the power tool. The fluid, which enters the displacement and
support device flows to the conduit through a junction.
[0015] Advantageously, the power cylinder is hydraulically operated
in which the water, which is necessary for cooling and flushing the
drill bit, is used as a pressure medium.
[0016] Advantageously, the support leg, which can be formed as an
elongate member, is connected with the power cylinder by a claw
member securable with a cross-pin.
[0017] Advantageously, the support device includes a stirrup-shaped
handle rotably and linearly displaceably mounted on the power
cylinder, which provides for an easy transportation of the
displacement and support device with two hands.
[0018] 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 embodiment, when read
with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In the Drawings:
[0020] FIG. 1 shows a schematic view illustrating the use of a
displacement and support device according to the present
invention;
[0021] FIG. 2 shows a cross-sectional view of a displacement and
support device according to the present invention along line II-II
in FIG. 3; and
[0022] FIG. 3 shows a side view of a displacement and support
device according to the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0023] FIG. 1 shows the use of a displacement and support device
with a portable power tool 1 used in underground mining and
provided with a rotably and percussion driven, water-flushed,
elongate drill 2. The displacement and support device is formed as
power cylinder 3 that supports the power tool 1 against a floor
and, simultaneously, applies to the drill 2 an acting in the
operational direction of the drill 2, controlled displacement
force. The power cylinder 3, which is inclined rearwardly, is
manually guided and controlled by a user 5. Water is fed to the
working or power cylinder 3 through a pressure hose 6, and to the
drill 2 through the power tool 1.
[0024] The power cylinder 3, which is shown in FIGS. 2-3, is formed
as a hydraulically driven, double-action, power cylinder and is
provided, at one of its end, with an assembly element 7 easily
securable to the power tool 1 and at another of its end, with a
support leg 8. The power cylinder 8 is manually controlled by a
control valve 10 which is formed as a rotary valve. The operation
of the control valve 10 is controlled by a manually rotationally
adjustable actuation member 9. The actuation member 9 is formed as
a handle extending transverse to the axis A of the power cylinder 3
and rotable about the handle axis B. The actuation member 9 is
rotationally adjustable within a rotational angle of
180.degree..
[0025] The assembly element 7 is formed as a partially torsion-free
bolt connection element extending sidewise transverse to the drill
axis and through an eyelet 16 provided on the power tool 1,
securing the power cylinder 3 to the power tool 1. Within the bolt
connection element, there is provided a fluid conduit 11 through
which fluid, which is fed through the pressure hose 6 into the
displacement and support device, is fed to the power tool 1. The
fluid, which enters the displacement and support device, flows to
the conduit 11 through a junction 12.
[0026] The support leg 8 is secured to another end of the power
cylinder 3 by a claw 14 that can be tangentially withdrawn. The
claw 14 is secured by a cross-pin 13. A pivotable and linearly
displaceable stirrup shaped handle 15 is provided on the power
cylinder 3.
[0027] Though the present invention was shown and described with
references to the preferred embodiment, such is merely illustrative
of the present invention and is 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 embodiment
or details thereof, and the present invention includes all
variations and/or alternative embodiments with the spirit and scope
of the present invention as defined by the appended claims.
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