WO1992012399A1 - Drill level - Google Patents
Drill level Download PDFInfo
- Publication number
- WO1992012399A1 WO1992012399A1 PCT/AU1991/000597 AU9100597W WO9212399A1 WO 1992012399 A1 WO1992012399 A1 WO 1992012399A1 AU 9100597 W AU9100597 W AU 9100597W WO 9212399 A1 WO9212399 A1 WO 9212399A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drill
- container
- level according
- drill level
- sight
- Prior art date
Links
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
Definitions
- This invention relates to a drill level attachable to a portable power drill or drill press which will enable a user to readily identify whether the drill has a vertical axis of rotation or a horizontal axis of rotation.
- Drill levels are old and well known and have been attached to portable drills in various ways, but most drills are made without 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.
- 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.
- the invention consists of a drill level having a resilient clamp portion of size to be po ⁇ itionable 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.
- the clamp is only a resilient clamp the level attachment can be readily applied to or removed from the drill bearing boss.
- many 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.
- 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;
- Fig. 4 is a top view of Fig. 1.
- a portable drill 10 i ⁇ provided with a bearing boss 11 having a diameter 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 outwardly diverging flanges 15 which facilitate positioning of clamp portion 13 on the boss 11, by opening the space between limbs 16.
- Resilient clamp 13 has 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 a ⁇ shown in Fig 1, extends laterally displaced from but parallel to the axis of rotation of the drill 10.
- the ⁇ ight container 17 ha ⁇ transparent wall ⁇ which include a ⁇ ide wall 19 which i ⁇ generally circular in cro ⁇ -section and convexly curved in the side view of Fig 3.
- Container 17 i ⁇ partially filled with liquid so that a bubble 20 is readily distinguishable when the side wall 19 is generally horizontal a ⁇ in Fig. 3.
- Groove ⁇ 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 marker ring 24 which assists in reading of the portion of bubble 20 when the drill chuck is oriented vertically.
- each transparent end wall 23 can be outwardly convex.
- a ball 26 is contained within the sight container, the ball being denser than the liquid, and smaller in diameter than the ⁇ ight 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.
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
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 identify whether the drill has a vertical axis of rotation or a horizontal axis of rotation.
BACKGROUND OF THE INVENTION
Drill levels are old and well known and have been attached to portable drills in various ways, but most drills are made without 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.
Examples 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 liquid;
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 Krebs, 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
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 quickly 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 SUMMARY 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.
More specifically, the invention consists of a drill level having a resilient clamp portion of size to be poεitionable 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
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 DRAWINGS
An embodiment of the invention is described hereunder in some detail with reference to and as illustrated in the accompanying drawings 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 iε provided with a bearing boss 11 having a diameter 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
outwardly diverging flanges 15 which facilitate positioning of clamp portion 13 on the boss 11, by opening the space between limbs 16.
Resilient clamp 13 has 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 aε shown in Fig 1, extends laterally displaced from but parallel to the axis of rotation of the drill 10. The εight container 17 haε transparent wallε which include a εide wall 19 which iε generally circular in croεε-section and convexly curved in the side view of Fig 3. Container 17 iε partially filled with liquid so that a bubble 20 is readily distinguishable when the side wall 19 is generally horizontal aε in Fig. 3. Grooveε 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 marker ring 24 which assists in reading of the portion of bubble 20 when the drill chuck is oriented vertically.
In both instances, there is a convex outer surface having a very large radius of curvature so that the sensitivity of the level is not impaired by its small εize.
If it is required 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 εight 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.
Although the invention will be seen to be particularly simple, nevertheless it results in a useful and valuable accesεory for a portable tool. It is of course also usable in a drill press.
Claims
1. A drill level having a resilient clamp portion of size to be poεitionable over a bearing bosε of a portable power drill, a limb on the clamp portion, a εight 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 εaid 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 εaid limb is one of a pair of limbε which converge outwardly and terminate in εaid sight container.
3. A drill level according to claim 2 wherein inner ends of εaid limbs comprise diverging flanges.
4. A drill level according to claim 3 wherein said side wall of the sight container is convexly curved in εide 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 |
---|---|---|---|
AUPK4102 | 1991-01-03 | ||
AUPK410291 | 1991-01-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992012399A1 true WO1992012399A1 (en) | 1992-07-23 |
Family
ID=3775167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1991/000597 WO1992012399A1 (en) | 1991-01-03 | 1991-12-23 | Drill level |
Country Status (2)
Country | Link |
---|---|
CA (1) | CA2077456A1 (en) |
WO (1) | WO1992012399A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29909035U1 (en) | 1999-05-22 | 1999-08-05 | Deblitz, Kurt, 22523 Hamburg | Dragonfly scale on the additional handle for drilling machines |
GB2338437A (en) * | 1998-06-09 | 1999-12-22 | Richard Rossendale Cook | Levelling device for an electric hand drill |
GB2358600A (en) * | 1999-11-18 | 2001-08-01 | Adam John Seedhouse | Attachable level device for electric drills |
Citations (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 |
US4785544A (en) * | 1988-02-01 | 1988-11-22 | Robert Heinsius | Spirit level accessory for the electric drill |
EP0312171A2 (en) * | 1987-10-14 | 1989-04-19 | La Maison Dentaire S.A. | Air-bubble level for portable tools |
-
1991
- 1991-12-23 WO PCT/AU1991/000597 patent/WO1992012399A1/en active Application Filing
- 1991-12-23 CA CA 2077456 patent/CA2077456A1/en not_active Abandoned
Patent Citations (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 |
EP0312171A2 (en) * | 1987-10-14 | 1989-04-19 | La Maison Dentaire 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 |
Cited By (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 |
Also Published As
Publication number | Publication date |
---|---|
CA2077456A1 (en) | 1992-07-04 |
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