US1831100A - Expansion bit - Google Patents
Expansion bit Download PDFInfo
- Publication number
- US1831100A US1831100A US493639A US49363930A US1831100A US 1831100 A US1831100 A US 1831100A US 493639 A US493639 A US 493639A US 49363930 A US49363930 A US 49363930A US 1831100 A US1831100 A US 1831100A
- Authority
- US
- United States
- Prior art keywords
- center bit
- bit
- cutters
- center
- hole
- 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.)
- Expired - Lifetime
Links
- 238000010276 construction Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
Definitions
- the invention aims to provide a devi-ce of the class described having novel means for controlling the lateral movement of the side bits. It is within the province of the disclosure, moreover, to improve generally, and to enhance the utility of, devices of that type to which the invention appertains.
- Figure 1 shows in side elevation, a device constructed in accordance with the inven-v tion
- Figure ⁇ 2 is a longitudinal section wherein parts appear in elevation
- Figure 3 is a side elevation of the tool, the bits being contracted, instead of expanded as in Figure 1;
- Figure 4 is an end elevation indicated by lthe line 4-4 in Figure 3;
- Figures 5 and 6 are sections taken on the lines 5 5 and 6--6 of Figure 2.
- the tool forming the subject matter of this application preferably is made of metal throughout. It comprises an elongated cylindrical body 1 provided with any desired number of spiral ribs 2.
- the body 1 has a rectangular bore 3 which is expanded at its rear end to form a socket 4 receiving the end 5,1930.
- a 5 l stop pin 11 is mounted inthe body 1 and eX- tends across the bore 3, the. above said pin eX- Atending across the recess V8 of the center bit 6 between the shoulders ⁇ 9 and 10.
- l l An abutment pin 12 extends across the bore 3 and is mounted in t 1e bodyy 1 somedistance behind the rear end of the center bit 6.
- a lcompression spring -abuts, the forward end of the spring I15 engaging the rear end of the center bit 6.
- the center bit On its rear'end, the center bit has a iinger 16 engaged within' the forward end of the spring 15 and aiding in holding the spring in place.
- the centerbit 6 is provided with a projection 17 in the formof a block, which extends around three sides of the center bit.
- the projection or block 17 is shown as being held in place by a securing element 18, but if desired, the projection' 17 and the center bit 6 may be formed inone piece, such a change "requiring no lspecific showing inthe drawings.
- the body 1 At its forward end, the body 1 "has outstanding 'enlargements 19, and certain of these enlargements may be formed integrally ⁇ with the forward ends of the spiral ribs 2, 30 as shown in Figure 3.
- the enlargements 19 have slots V2O across which extend pivot elements 21.
- Side cutters 22 and 23 are mounted at their rear' ends in the slots 2O and'on the pivot elements 21, for'inward and outward radial swinging movement.
- the side cutters 22 and 23 may be beveled and sharpened at their forwardends, as shown at 26, although the cutting edges of the side cutters 22 and 23 may be formed in any desired man-l body,
- Cams 24 are held on the side cutters .23 by securing devices 25, although the cams might be formed in one piece with the side cutters if desired.
- the side cutter 22 does not have a cam 24.
- the side cutter 22 being nearest to the center bit 6, the side cutters 23 extending outwardly at progressively increasing angles.
- the cutters 22 and 1 23,- therefore, cut one after another, to ream out and enlarge the hole at its inner end, as .the tool is rotated. After the hole has been reamed out to the desired extent, the tool can be withdrawn. As soon as there is yno pressure on the forward end of the center bit 6,
- vthe center bit 6 isl shovedforwardly by the action of the spring 15, and then, the side cutters 22 and 23 can swing inwardly into approximate parallelism with thee-enter bit 6 as vshown in Figure 3, thereby permitting the tool to be pulled out of the hole.
- the device is simple in. construction, but
- a center bit mounted for reciprocation in the body, side cutters pivoted to the body, and relatively inclined parts on the side cutters and on the center bit, said inclined parts being so proportioned that, when the center bit moves rearwardly, the side cutters will be inclined outwardly at different angles with respect to the center bit.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Description
LssLloo R. E. DIAL EXPANSION BIT Nov. 10, 1931.
filed Nov. 5. 195o 2 Sheets-Sheet 1 Nov. 1o, 1931.
R. E. DIAL 1,83,l00
EXPANSION BIT 2 Sheets-Sheet 2 Filed Nov. 5. 1930 GMM/nui@ Patented Nov. 10, 1931 Unirse STATES PATENT/OFFICE ROBERT E. DIAL, or RosEDALn, INDIANA,` AssIGNoR or ONE-HALF To HERMAN In BRUNNER, or nosEDALn, INDIANA EXPANSION BIT i Application filed November By way of explanation, it may be stated that it is common in coal mines, to bore a hole for a charge of power, and this invention aims to provide a novel expansion bit, which, placed in the hole, can be expanded, so as to ream out a chamber at the inner end of the hole, thereby to enable the powder to be placed more advantageously for a shot.
The invention aims to provide a devi-ce of the class described having novel means for controlling the lateral movement of the side bits. It is within the province of the disclosure, moreover, to improve generally, and to enhance the utility of, devices of that type to which the invention appertains.
lVith the above and other objects in view which will appear as the description proceeds,
Athe invention resides in the combination and arrangement oi parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope oi what is claimed without departing from the spirit of the invention.
In the accompanying drawings Figure 1 shows in side elevation, a device constructed in accordance with the inven-v tion;
Figure`2 is a longitudinal section wherein parts appear in elevation;
Figure 3 is a side elevation of the tool, the bits being contracted, instead of expanded as in Figure 1;
Figure 4 is an end elevation indicated by lthe line 4-4 in Figure 3;
Figures 5 and 6 are sections taken on the lines 5 5 and 6--6 of Figure 2.
The tool forming the subject matter of this application preferably is made of metal throughout. It comprises an elongated cylindrical body 1 provided with any desired number of spiral ribs 2. The body 1 has a rectangular bore 3 which is expanded at its rear end to form a socket 4 receiving the end 5,1930. serial No. 493,639(
is a recess 8 forming shoulders 9 and 10.V A 5 l stop pin 11 is mounted inthe body 1 and eX- tends across the bore 3, the. above said pin eX- Atending across the recess V8 of the center bit 6 between the shoulders `9 and 10. l l An abutment pin 12 extends across the bore 3 and is mounted in t 1e bodyy 1 somedistance behind the rear end of the center bit 6. Against the pin I 12, a lcompression spring -abuts, the forward end of the spring I15 engaging the rear end of the center bit 6. On its rear'end, the center bit has a iinger 16 engaged within' the forward end of the spring 15 and aiding in holding the spring in place.
The centerbit 6 is provided with a projection 17 in the formof a block, which extends around three sides of the center bit. The projection or block 17 is shown as being held in place by a securing element 18, but if desired, the projection' 17 and the center bit 6 may be formed inone piece, such a change "requiring no lspecific showing inthe drawings. At its forward end, the body 1 "has outstanding 'enlargements 19, and certain of these enlargements may be formed integrally `with the forward ends of the spiral ribs 2, 30 as shown in Figure 3. The enlargements 19 have slots V2O across which extend pivot elements 21. Side cutters 22 and 23 are mounted at their rear' ends in the slots 2O and'on the pivot elements 21, for'inward and outward radial swinging movement. The side cutters 22 and 23 may be beveled and sharpened at their forwardends, as shown at 26, although the cutting edges of the side cutters 22 and 23 may be formed in any desired man-l body, .on the body,
ner. Cams 24 are held on the side cutters .23 by securing devices 25, although the cams might be formed in one piece with the side cutters if desired. The side cutter 22 does not have a cam 24.
the spring 15 In practical operation,
until the forces the center bit 6 forwardly, shoulder 10 engages the stop pin 11. Under such circumstances, the side cutters 22 and 23 are swung inwardly, as shown in Figure 3, the side cutter 22 resting against the center bit 6, as shown in Figure 3, and the projection 17 being clear of the cams 24; on the side cut.- ters 23 so that the said side cutters can swing f inwardly.
When the point 7 of the'center bitf6 comes into contact with the inner end of the hole that has been bored, the center bit- 6 is shoved backwardly into the position of Figure2, the spring being compressed, and the shoulder ,f9'coming into contact with the stop pin 11. `As' the Vcenter bit 6 moves backwardly, the `projection or blockr 17 co-operates with the cams 24 on the sidecutters 23 and swings the side Vcutters 23 outwardly, the side cutter 22 remaining lin place near the sid-e edge of the center bit 6, as shown in lFigure 2 of the drawings. lThe cams 24 are so placed on the yside cutters `23 that the side cutters 23 will extend outwardly at different angles with.
respect to the center bit 6, the side cutter 22 being nearest to the center bit 6, the side cutters 23 extending outwardly at progressively increasing angles. The cutters 22 and 1 23,- therefore, cut one after another, to ream out and enlarge the hole at its inner end, as .the tool is rotated. After the hole has been reamed out to the desired extent, the tool can be withdrawn. As soon as there is yno pressure on the forward end of the center bit 6,
The device is simple in. construction, but
it aifords means whereby a miner can ream 1 out a blast -hole readily. The `device form- -=1ng -respectto `the center bit, whenthe center bit moves rearwardly.
V2. In, Va device ofthe :class described, -a
body, a center bit mounted for reciprocation in the body, side cutters pivoted to the body, and relatively inclined parts on the side cutters and on the center bit, said inclined parts being so proportioned that, when the center bit moves rearwardly, the side cutters will be inclined outwardly at different angles with respect to the center bit.
In testimony` that I claim the foregoing as my own, I have hereto aiixed my signature.
ROBERT. DIAL.
l'iG
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US493639A US1831100A (en) | 1930-11-05 | 1930-11-05 | Expansion bit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US493639A US1831100A (en) | 1930-11-05 | 1930-11-05 | Expansion bit |
Publications (1)
Publication Number | Publication Date |
---|---|
US1831100A true US1831100A (en) | 1931-11-10 |
Family
ID=23961095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US493639A Expired - Lifetime US1831100A (en) | 1930-11-05 | 1930-11-05 | Expansion bit |
Country Status (1)
Country | Link |
---|---|
US (1) | US1831100A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2331467A1 (en) * | 1973-06-20 | 1975-01-23 | Stumpp & Kurz | Fixing of spreading fastener in concrete wall - prevents fastener from pulling loose by making accommodating hole with part frusto-conical section |
-
1930
- 1930-11-05 US US493639A patent/US1831100A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2331467A1 (en) * | 1973-06-20 | 1975-01-23 | Stumpp & Kurz | Fixing of spreading fastener in concrete wall - prevents fastener from pulling loose by making accommodating hole with part frusto-conical section |
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