CA2077456A1 - Drill level - Google Patents
Drill levelInfo
- Publication number
- CA2077456A1 CA2077456A1 CA 2077456 CA2077456A CA2077456A1 CA 2077456 A1 CA2077456 A1 CA 2077456A1 CA 2077456 CA2077456 CA 2077456 CA 2077456 A CA2077456 A CA 2077456A CA 2077456 A1 CA2077456 A1 CA 2077456A1
- Authority
- CA
- Canada
- Prior art keywords
- drill
- container
- level according
- sight
- drill level
- 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
Links
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 239000012780 transparent material Substances 0.000 claims description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QMTNOLKHSWIQBE-FGTMMUONSA-N exo-(+)-cinmethylin Chemical compound O([C@H]1[C@]2(C)CC[C@@](O2)(C1)C(C)C)CC1=CC=CC=C1C QMTNOLKHSWIQBE-FGTMMUONSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- 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
- B25F5/02—Construction of casings, bodies or handles
- B25F5/021—Construction of casings, bodies or handles with guiding devices
- B25F5/023—Construction of casings, bodies or handles with guiding devices with removably attached levels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/18—Measuring inclination, e.g. by clinometers, by levels by using liquids
- G01C9/24—Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble
- G01C9/26—Details
- G01C9/28—Mountings
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
Abstract
In this invention a drill level (12) has a resilient clamp portion (13) by which it can be located over and carried by a bearing boss (11) on a drill (10), and a limb (16) on the clamp portion (13) and carrying a transparent sight container (17) containing liquid and a bubble (20) which can be viewed through a side wall (19) of the container (17) when the drill is horizontal or an end wall when vertical.
Description
W092/12399 2 0 7 7 ~ ~ ~ PCT/AU91/00~97 DRILL LEVEL
This invention relates to a drill level attachable to a portable power drill or drill press which will enable a user to readily ident~fy whether the drill has a vertical axis of rotation or a hori20ntal axi~ of rotation~
~CKGROUND OF THE INVENTION
Drill levals arG old and well ~nown and hava bQen attached to portable drills in various ways, but most drills are made wi~thout drill levels even though there is frequently a need for a drill level which will assist an operator to know the orientation of the drill.
~xamples of earlier proposals of drill levels exist in the prior art, including:
Australian patent application 58068/80 Breeden which described a curved tube contained within a drill housing near the handle end, and a domed container at the handle end, both incompletely filled with liguid;
Australian petty patent 21402/88 Taylor and O'Reilly, which utilised a disc located in or on the drill housing, hanging as a pendulum, and forming part of an electronic indicator assembly;
Australian patent 243299 Matejicek, which utilised a bracket attached to a drill housing which carried on it a hemispherical level chamber; and Australian patent 424519 Rrebs, which also utilised a hemisperical level chamber attached to a drill housing.
One of the problems previously encountered has been the need to have a sight surface which has a large radius of curvature W092/t2399 PCT/AU91/00~97 G
in the "bubble`' type of drill level so that a reasonable degree of accuracy can be achieved. Another related problem is the need to maintain the drill level to a very small size so that it will not excessively limit the capacity of a drill to enter a confined space. Still further, there is a need for a quickly attachable drill level which can be normally not used but guickly attached to a drill when its use is required, thereby reducing the danger of damage to the level when it is inappropriate for its use~
BRIEF SUMM~RY OF THE INVENTION
In this invention a drill level has a resilient clamp portion by which it can be located over and carried by a bearing boss on a drill, and a limb on the clamp portion carrying a transparent sight container containing liquid and a bubble which can be viewed through a side wall of the container when the drill is horizontal or an end wall when vertical~
Nore specifically, the invention consists of a drill level having a resilient clamp portion of size to be positionable over a bearing boss of a portable power drill, a limb on the clamp portion, a sight container carried by the limb and having a curved side wall and a convex end wall both said walls being of transparent material, the container being partially filled with liquid but having a bubble visible through a respective said wall when that wall extends through a horizontal plane.
With this arrangement even though the size can be kept very small, nevertheless the radius of curvature both of the side and end walls of the container can be quite large so that a high degree of accuracy can be readily achieved~ Further, since the clamp is only a resilient clamp the level attachment can be readily applied to or removed from the drill bearing boss~ In this regard it may be noted that many ~092/t2399 2 ~ 7 7 4 a 6 PCT~Aust/0o;97 drills are made to a standard diameter of drill bearing bosses so that various attachments can be utilised by way of accessories, and therefore one drill level in accordance with this invention is adaptable to a large number of portable drills~
DETAILED DESCRIPTION OF THE DR~WIN~
~n Qmbodiment of the invention is described hereunder in some d~tail with reference to and as illustrated in the accompanying dra~ngs in which Fig~ 1 is a perspective view showing a drill level mounted on the small portable power drill;
Fig~ 2 is a front view of the drill level drawn to a larger scale;
Fig~ 3 is a side view corresponding to that of Fig. 1;
and Fig~ 4 is a top view of Fig~ 1~
In this embodiment a portable drill 10 is provided with a bearing boss 11 having a diametQr which may be termed a '`standard diameter"~ Being a '`standard diameter", the accessory herein described can be used on other drills~
A drill level 12 comprises a discontinuous resilient clamp portion 13, rendered discontinuous by abutting walls 14, the inner part of clamp portion 13 being curved with a radius R which is a little smaller than the radius of the bearing boss 11 so that the drill level grips the bearing boss when the clamp is engaged around it~ Desirably there is sufficient resilience in the clamp portion for it to fit a range of sizes without alteration, or with a minimum of adaptation devices. The abutting walls 14 are at the ends of W092/12399 ~ PCT/AU91/00~97 ~ Qr¦ ~ ` 4 outwardly diverging flanges 1~ which facilitate positioning of clamp portion 13 on the boss 11, by opening the space between limbs 16~
Resilient clamp 13 hàs a pair of said limbs 16 which converge outwardly and terminate in a sight container 17 which is generally cylindrical and extends at right angles to limbs 16, and as shown in Fig 1, extends laterally displaced from but parallel to the axis of rotation of the drill 10~ The sight container 17 has transparent walls which include a side wall 19 which is generally circular in cross-section and convexly curved in the side ViQW of Fig 3~ Container 17 is partially filled with liquid so that a bubble 20 is readily distinguishable when the side wall 19 is generally horizontal as in Fig~ 3~ Grooves 21 provide datum marks to facilitate reading of the position of bubble 20 The end of the sight container 17 is a transparent end wall 23 which is outwardly convex, and has a ~arker ring 24 which assists in reading of the portion of bubble 20 when the drill chuck is oriented vertically.
~n both instances, there is a conve~ outer surface having a very large radius of curvature so that the sensitivity of the level is not impaired by its small si2e.
If it is re~uirQd to check for vertically up and vertically down drilling, the clamp 13 may simply be reversed in direction, or alternatively each transparent end wall 23 can be outwardly convex. In order to facilitate identification of vertical when drilling upwardly, a ball 26 is contained within the sight container, the ball being denser than the liquid, and smaller in diameter than the sight container so that it occupies a central position on the inner surface of the transparent end wall 23 only when the container is inverted and vertical.
This invention relates to a drill level attachable to a portable power drill or drill press which will enable a user to readily ident~fy whether the drill has a vertical axis of rotation or a hori20ntal axi~ of rotation~
~CKGROUND OF THE INVENTION
Drill levals arG old and well ~nown and hava bQen attached to portable drills in various ways, but most drills are made wi~thout drill levels even though there is frequently a need for a drill level which will assist an operator to know the orientation of the drill.
~xamples of earlier proposals of drill levels exist in the prior art, including:
Australian patent application 58068/80 Breeden which described a curved tube contained within a drill housing near the handle end, and a domed container at the handle end, both incompletely filled with liguid;
Australian petty patent 21402/88 Taylor and O'Reilly, which utilised a disc located in or on the drill housing, hanging as a pendulum, and forming part of an electronic indicator assembly;
Australian patent 243299 Matejicek, which utilised a bracket attached to a drill housing which carried on it a hemispherical level chamber; and Australian patent 424519 Rrebs, which also utilised a hemisperical level chamber attached to a drill housing.
One of the problems previously encountered has been the need to have a sight surface which has a large radius of curvature W092/t2399 PCT/AU91/00~97 G
in the "bubble`' type of drill level so that a reasonable degree of accuracy can be achieved. Another related problem is the need to maintain the drill level to a very small size so that it will not excessively limit the capacity of a drill to enter a confined space. Still further, there is a need for a quickly attachable drill level which can be normally not used but guickly attached to a drill when its use is required, thereby reducing the danger of damage to the level when it is inappropriate for its use~
BRIEF SUMM~RY OF THE INVENTION
In this invention a drill level has a resilient clamp portion by which it can be located over and carried by a bearing boss on a drill, and a limb on the clamp portion carrying a transparent sight container containing liquid and a bubble which can be viewed through a side wall of the container when the drill is horizontal or an end wall when vertical~
Nore specifically, the invention consists of a drill level having a resilient clamp portion of size to be positionable over a bearing boss of a portable power drill, a limb on the clamp portion, a sight container carried by the limb and having a curved side wall and a convex end wall both said walls being of transparent material, the container being partially filled with liquid but having a bubble visible through a respective said wall when that wall extends through a horizontal plane.
With this arrangement even though the size can be kept very small, nevertheless the radius of curvature both of the side and end walls of the container can be quite large so that a high degree of accuracy can be readily achieved~ Further, since the clamp is only a resilient clamp the level attachment can be readily applied to or removed from the drill bearing boss~ In this regard it may be noted that many ~092/t2399 2 ~ 7 7 4 a 6 PCT~Aust/0o;97 drills are made to a standard diameter of drill bearing bosses so that various attachments can be utilised by way of accessories, and therefore one drill level in accordance with this invention is adaptable to a large number of portable drills~
DETAILED DESCRIPTION OF THE DR~WIN~
~n Qmbodiment of the invention is described hereunder in some d~tail with reference to and as illustrated in the accompanying dra~ngs in which Fig~ 1 is a perspective view showing a drill level mounted on the small portable power drill;
Fig~ 2 is a front view of the drill level drawn to a larger scale;
Fig~ 3 is a side view corresponding to that of Fig. 1;
and Fig~ 4 is a top view of Fig~ 1~
In this embodiment a portable drill 10 is provided with a bearing boss 11 having a diametQr which may be termed a '`standard diameter"~ Being a '`standard diameter", the accessory herein described can be used on other drills~
A drill level 12 comprises a discontinuous resilient clamp portion 13, rendered discontinuous by abutting walls 14, the inner part of clamp portion 13 being curved with a radius R which is a little smaller than the radius of the bearing boss 11 so that the drill level grips the bearing boss when the clamp is engaged around it~ Desirably there is sufficient resilience in the clamp portion for it to fit a range of sizes without alteration, or with a minimum of adaptation devices. The abutting walls 14 are at the ends of W092/12399 ~ PCT/AU91/00~97 ~ Qr¦ ~ ` 4 outwardly diverging flanges 1~ which facilitate positioning of clamp portion 13 on the boss 11, by opening the space between limbs 16~
Resilient clamp 13 hàs a pair of said limbs 16 which converge outwardly and terminate in a sight container 17 which is generally cylindrical and extends at right angles to limbs 16, and as shown in Fig 1, extends laterally displaced from but parallel to the axis of rotation of the drill 10~ The sight container 17 has transparent walls which include a side wall 19 which is generally circular in cross-section and convexly curved in the side ViQW of Fig 3~ Container 17 is partially filled with liquid so that a bubble 20 is readily distinguishable when the side wall 19 is generally horizontal as in Fig~ 3~ Grooves 21 provide datum marks to facilitate reading of the position of bubble 20 The end of the sight container 17 is a transparent end wall 23 which is outwardly convex, and has a ~arker ring 24 which assists in reading of the portion of bubble 20 when the drill chuck is oriented vertically.
~n both instances, there is a conve~ outer surface having a very large radius of curvature so that the sensitivity of the level is not impaired by its small si2e.
If it is re~uirQd to check for vertically up and vertically down drilling, the clamp 13 may simply be reversed in direction, or alternatively each transparent end wall 23 can be outwardly convex. In order to facilitate identification of vertical when drilling upwardly, a ball 26 is contained within the sight container, the ball being denser than the liquid, and smaller in diameter than the sight container so that it occupies a central position on the inner surface of the transparent end wall 23 only when the container is inverted and vertical.
2 o 7 7 4 PCT/AU91/00~97 Although the invention will be seen to be particularly simple, nevertheless it results in a useful and valuable accessory for a portable tool. It is of course also usable in a drill press.
Claims (9)
1. A drill level having a resilient clamp portion of size to be positionable over a bearing boss of a portable power drill, a limb on the clamp portion, a sight container carried by the limb and having a curved side wall and a convex end wall, both said walls being of transparent material, the container being partially filled with liquid but having a bubble visible through a respective said wall when that wall extends through a horizontal plane.
2. A drill level according to claim 1 wherein said resilient clamp portion comprises a discontinuous inner part which is of curved shape and wherein said limb is one of a pair of limbs which converge outwardly and terminate in said sight container.
3. A drill level according to claim 2 wherein inner ends of said limbs comprise diverging flanges.
4. A drill level according to claim 3 wherein said side wall of the sight container is convexly curved in side elevation.
5. A drill level according to claim 4 wherein said side wall of the sight container comprises a pair of spaced marks.
6. A drill level according to claim 4 wherein said container has two said end walls at least one of which is convexly curved.
7. A drill level according to claim 6 wherein at least one of said end walls comprises a central marking ring.
8. A drill level according to any preceding claim further comprising a ball contained within the sight container, the ball being denser than said liquid and smaller in diameter than the sight container so that it occupies a central position on the inner surface of said transparent end wall only when the container is inverted and vertical.
9. A drill level substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPK410291 | 1991-01-03 | ||
| AUPK4102 | 1991-01-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2077456A1 true CA2077456A1 (en) | 1992-07-04 |
Family
ID=3775167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2077456 Abandoned CA2077456A1 (en) | 1991-01-03 | 1991-12-23 | Drill level |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2077456A1 (en) |
| WO (1) | WO1992012399A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2338437A (en) * | 1998-06-09 | 1999-12-22 | Richard Rossendale Cook | Levelling device for an electric hand drill |
| DE29909035U1 (en) | 1999-05-22 | 1999-08-05 | Deblitz, Kurt, 22523 Hamburg | Dragonfly scale on the additional handle for drilling machines |
| GB2358600A (en) * | 1999-11-18 | 2001-08-01 | Adam John Seedhouse | Attachable level device for electric drills |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH569257A5 (en) * | 1973-07-31 | 1975-11-14 | Styner Rudolf | Simple attitude indicator for tools - gives readings of attitude of tool during use and is especially for drills |
| GB1511490A (en) * | 1975-07-24 | 1978-05-17 | Strawson K | Spirit levels in or for attachment to pistol drills and other hand held electric drills |
| US4154001A (en) * | 1977-12-27 | 1979-05-15 | Serafin Joseph W | Electric hand drill aligning level |
| US4295279A (en) * | 1980-03-10 | 1981-10-20 | Sienknecht Walter F | Hand tool leveling apparatus |
| DE3405498A1 (en) * | 1984-02-16 | 1984-10-11 | Hautmann, Hans, 6703 Limburgerhof | Method and apparatus for the production of vertical holes by means of a hand drill |
| CH647969A5 (en) * | 1984-03-14 | 1985-02-28 | Adolf Wolf | Attachment for a portable drilling machine |
| GB2183036A (en) * | 1985-11-07 | 1987-05-28 | Malcolm John Bristow | Boring tool |
| DE3601920A1 (en) * | 1986-01-23 | 1987-07-30 | John W Eppler | Attachment for a portable drilling machine, portable hammer drill or the like |
| IT212013Z2 (en) * | 1987-10-14 | 1989-05-25 | Ensofor S A | AIR BUBBLE LEVEL FOR PORTABLE TOOLS. |
| US4785544A (en) * | 1988-02-01 | 1988-11-22 | Robert Heinsius | Spirit level accessory for the electric drill |
-
1991
- 1991-12-23 CA CA 2077456 patent/CA2077456A1/en not_active Abandoned
- 1991-12-23 WO PCT/AU1991/000597 patent/WO1992012399A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO1992012399A1 (en) | 1992-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4589213A (en) | Conduit bending level | |
| US4295279A (en) | Hand tool leveling apparatus | |
| US4813149A (en) | Level device | |
| US3225451A (en) | Piggyback pocket level | |
| US4973205A (en) | Hand drill apparatus | |
| US6122788A (en) | Hammer with accessories | |
| US5477619A (en) | Tape measure marking attachment | |
| US6049991A (en) | Picture hanging position marking tool | |
| US4731933A (en) | Protractor-chalkline | |
| US9151606B2 (en) | Post level | |
| US4141151A (en) | Drill leveling arrangement | |
| US6131298A (en) | Self-supporting level measurement device | |
| US5839612A (en) | Caulking dispensing drill attachment | |
| CA2462987A1 (en) | Vibration-dampening drill collar | |
| CA2077456A1 (en) | Drill level | |
| EP1179396B1 (en) | Power tool level indicator | |
| US20040040169A1 (en) | Power tool alignment device | |
| US4432146A (en) | Integrated drill leveling apparatus | |
| US20030134716A1 (en) | Hand operable exercising machine having an adjustable handle | |
| US2502171A (en) | Angle guide attachment for boring tools | |
| US3011263A (en) | Plumb bob device | |
| US6508011B1 (en) | Bolt hole marker | |
| AU9119391A (en) | Drill level | |
| WO1990014928A1 (en) | Angle finding device | |
| US3896864A (en) | Tire hammer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |