US1080095A - Percussive tool. - Google Patents
Percussive tool. Download PDFInfo
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- US1080095A US1080095A US67759212A US1912677592A US1080095A US 1080095 A US1080095 A US 1080095A US 67759212 A US67759212 A US 67759212A US 1912677592 A US1912677592 A US 1912677592A US 1080095 A US1080095 A US 1080095A
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- Prior art keywords
- piston
- valve
- chamber
- piston chamber
- holding
- Prior art date
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- Expired - Lifetime
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- 239000012530 fluid Substances 0.000 description 62
- 229910000831 Steel Inorganic materials 0.000 description 30
- 239000010959 steel Substances 0.000 description 30
- 230000001276 controlling effect Effects 0.000 description 25
- 238000004140 cleaning Methods 0.000 description 2
- 206010010071 Coma Diseases 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229920000136 polysorbate Polymers 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
Definitions
- the object of my invention is to provide means for utilizing the motive fluid for cleaning out a hole being bored, by maintaining the bore of the hollow drill steel in open communication with the motive fluid supply when so desired.
- My invention more particularly comprises means under manual control for holding the piston controlling valve in one position, thus stopping the operation of the tool while the motive flul'd is used for cleaning out the hole being bored.
- Figure 1 represents a percussive tool of the piston hammer type in side elevaiion 1 2 is a transverse section taken in the plane of the line A-A of Fig. 1, and Fig. 3 is a general longitudinal central section through the tool, the controlling valve chest being shown in section in the plane of the line B-B of Fig. 2, and Fig. 4 is a diagrammatic section indicating the motive fluid ports and passages.
- the tool cylinder is denoted by l, the work piston by 2 and its chamber by 3.
- the front head is denoted by 4 and the front head washer by 5. shown mounted in the washer 5 in position to be struck by the piston :2.
- a hollow drill steel 7 is shown inserted through the head block in position to be struck by the anvil
- the controlling valve chest 8 is interposed between the back head 9 and the handle 10 of the tool, which valve chest is shown herein as containing an oscillating controlling valve 11 of the double winged type, one wing 12 being arranged to control the motive fluid inlet ports 14, 13, for the back and front ends of the piston chamber 3 and the other wing 15 being arranged to control the back and front exhaust ports 17,
- a hollow anvil block 6 is v 16, of the piston chamber
- the motive fluid supply passage is denoted by 18 and the exhaust passage by 19.
- Means under manual control are provided for holding the piston controlling valve 11 in one position when so desired, for instance, in position to close the inlet port for the back end of the piston chamber and the exhaust port for the front end of the piston chamber and open the exhaust port for the back end of the piston chamber and the inlet port for the front end of the piston chamber.
- The'means which I have shown herein for accomplishing this purpose comprises a pin 20, mounted in the valve chest 8, in position to have its inner end brought into and out of'engagement with the Wing 12 of the controlling valve by a cam 21 and a spring 22.
- the spring 22 is shown as tending to force the pin outwardly away from the valve wing 12, and into engagement with the cam 21 on the cross shaft 23, which cross shaft is provided with a handle 24 for turning the same.
- This cross shaft 23 may be provided with means for retaining it in its different positions as for instance, a friction device including a spring 25 located in a recess 26 in the valve chest and engaging the shaft 23.
- the operator may turn the handle 24 and thereby the shaft .23, in a direction to cause the cam 21 to force the pin 20 inwardly against the face of the valve wing .12; thus forcing the valve wing over to a position which will open communication from the motive fluid sup ply 18 to the bore of the drill steel 7, through the front end of the piston chamber 3 and the bore of the hollow anvil block 6. While the controlling valve is held in this position, the operation of the work piston 2 is stopped and the communication between the motive fluid supply and the bore of the drill steel 7 is maintained.
- the handle 24; of the shaft 28 is turned in a direction to permit the pin 20 to move outwardly away from its engagement with the valve ring 12 and thereby permit the valve to continue its oscillations.
- valve and the form of the manually controlled device shown herein is not essential to the invention, as I contemplate the use of the invention in connection with valves of any type and manually controlled devices of any type for holding the valve in position to produce the result above set forth. It is also evident that the invention is not to be limited to percussive tools of the type shown and described herein, but may be used in connection with tools of any type wherever applicable.
- a pressure fluid operated distributing oscillating valve and means under manual control for holding the valve in one position.
- a pressure fluid operated distributing oscillating valve and means under manual control for holding the valve in position to stop the operation of the tool.
- a percussive tool In a percussive tool, a hollow drill steel, a pressure fluid operated distributing valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the drill steel.
- a percussive tool a hollow drill steel, a pressure fluid operated distributing oscillating valve and means under manual con trol for holding the valve in position to maintain communication between the motive fluid supply and the drill steel.
- a percussive tool a hollow drill steel, a pressure fluid operated distributing valve and means under manual control for holding the valve in position to stop the operation of the tool and to maintain communication between the motive fluid supply and the drill steel.
- a percussive tool a hollow drill steel, a pressure fluid operated distributing oscillating valve and means under manual control for holding the valve in position to stop the operation of the tool and to maintain communication between the motive fluid supply and the drill steel.
- a work piston In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and one end of the'piston chamber to stop the operation of the piston.
- a work piston In a percussive tool, a work piston. a piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the va ve in position to maintain communication between the motive fluid supply and one end of the piston chamber to stop the operation of the piston.
- a work piston In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the front end of the piston chamber to stop the operation of the piston.
- a work piston In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the front end of the piston chamber to stop the operation of the piston.
- a work piston a piston chamber, a hollow drill steel in communication with the piston chamber, a pressure fluid operated piston controlling valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the hollow drill steel through said piston chamber.
- a work piston In a percussive tool, a work piston, a piston chamber, a hollow drill steel in communication with the piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the hollow drill steel through said piston chamber.
- a work piston In a percussive tool, a work piston, a piston chamber, a hollow drill steel in communication with the piston chamber, a pressure fluid operated piston cont-rolling valve and means under manual control for holding the valve in position to stop the operation of the piston and to maintain communication between the motive fluid supply and the hollow drill steel through said piston chamber.
- a percussive tool a work piston, a piston chamber, a hollow drill steel in communication with the piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to stop the operation of the piston and to maintain communication between the motive fluid supply and the hollow drill steel through said piston chamber.
- a work piston In a percussive tool, a work piston, a piston chamber. a hollow drill steel in communication with the front end of the piston chamber, a pressure fluid operated piston controlling valve and means under manual control for holding the valve in position to maintain conmiunication between the motive fluid supply and the hollow drill steel through the front end of the piston chamber.
- a work piston In a percussive tool, a work piston, a piston chamber, a hollow drill steel in compiston controllin stop the operation of the piston and to maintain communication between the motive fluid supply and the drill steel through the front end of the piston chamber.
- a work piston In a percussive tool, a work piston, a piston chamber, a hollow drill steel in communication with the front end of the piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to stop the operation of the piston and to maintain communication between the motive fluid supply and the drill steel through the front end of the piston chamber.
- a percussive tool a work piston, a piston chamber, a pressure fluid operated piston controlling valve and means under manual control for holding the valve in position to maintain communication between the motive fluid su ply and one end of the piston chamber and close the exhaust from the same end of said chamber.
- a work piston Ina percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual controlfor holding the valve in position to maintain-communication between the motive fluid supply and one end of the piston chamber and at the same time close the exhaust from the same end of said chamber.
- a percussive tool a work piston, a piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the front end of the piston chamber and at the same time close the exhaust from the front end of said chamber.
- a percussive tool a work piston, a piston chamber, a hollow drill steel in communication with the front end of the piston chamber, a pressure fluid operated piston controlling valve and means under manual control for holding the valve in position to maintain communication between the motive' fluid supply and the drill steel through the front end of the piston chamber and at the same time close the exhaust from the front end of said chamber.
- a work piston In a percussive tool, a work piston, a piston chamber, a hollow drill steel in comunication with the front end of the piston c amber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the drill steel through the front end of the piston chamber and at the same time close the exhaust from the front end of said chamber.
- a work piston In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and 'one end of the chamber and at the same time close the exhaust for the same end of said chamber and open the exhaust for the other end of said chamber and close communication between the motive fluid supply and the last named end of said chamber.
- a work piston In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and one end of the chamber and at the same time close the exhaust for the same end of said chamber and open the exhaust for the other end of said chamber and close communication between the motive fluid supply and the last named end of said chamber.
- a work piston In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controllin valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the front end of the chamber, close communication between the motive fluid supply and the back end of the chamber and at the same time close the exhaust from the front end of said chamber and open the exhaust from the back end ofsaid chamber.
- a work piston In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and i and the back end of the chamber and at the February 1912.
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- 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)
- Percussive Tools And Related Accessories (AREA)
Description
' L. c. BAYLES.
PEBGUSSIVB TOOL. APPLICATION FILED F3114, 1912.
Patented Dec. 2, 1913.
with my invention applied thereto.
i block 6.
it t
LEWIS C. BAYLES, F EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RA'NID COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.
PERCUSSIVE. TOOL.
Specification of Letters Patent.
Patented Dec. 2,1913.
Application filed February 14', 1912. Serial No. 677,592.
To all whom it may concern Be itknown that I, LEWIS C. Barnes, a citizen of the United States, and resident of Easton, in-the county of Northampton and State of Pennsylvania, have invented a new and useful Improvement in Percussive Tools, of which the following is a specification.
The object of my invention is to provide means for utilizing the motive fluid for cleaning out a hole being bored, by maintaining the bore of the hollow drill steel in open communication with the motive fluid supply when so desired.
My invention more particularly comprises means under manual control for holding the piston controlling valve in one position, thus stopping the operation of the tool while the motive flul'd is used for cleaning out the hole being bored.
A practical embodiment of the invention is represented in the accompanying drawings, in which,
Figure 1 represents a percussive tool of the piston hammer type in side elevaiion 1 2 is a transverse section taken in the plane of the line A-A of Fig. 1, and Fig. 3 is a general longitudinal central section through the tool, the controlling valve chest being shown in section in the plane of the line B-B of Fig. 2, and Fig. 4 is a diagrammatic section indicating the motive fluid ports and passages.
The tool cylinder is denoted by l, the work piston by 2 and its chamber by 3. The front head is denoted by 4 and the front head washer by 5. shown mounted in the washer 5 in position to be struck by the piston :2. A hollow drill steel 7 is shown inserted through the head block in position to be struck by the anvil The controlling valve chest 8 is interposed between the back head 9 and the handle 10 of the tool, which valve chest is shown herein as containing an oscillating controlling valve 11 of the double winged type, one wing 12 being arranged to control the motive fluid inlet ports 14, 13, for the back and front ends of the piston chamber 3 and the other wing 15 being arranged to control the back and front exhaust ports 17,
A hollow anvil block 6 is v 16, of the piston chamber The motive fluid supply passage is denoted by 18 and the exhaust passage by 19.
Means under manual control are provided for holding the piston controlling valve 11 in one position when so desired, for instance, in position to close the inlet port for the back end of the piston chamber and the exhaust port for the front end of the piston chamber and open the exhaust port for the back end of the piston chamber and the inlet port for the front end of the piston chamber. The'means which I have shown herein for accomplishing this purpose comprises a pin 20, mounted in the valve chest 8, in position to have its inner end brought into and out of'engagement with the Wing 12 of the controlling valve by a cam 21 and a spring 22. The spring 22 is shown as tending to force the pin outwardly away from the valve wing 12, and into engagement with the cam 21 on the cross shaft 23, which cross shaft is provided with a handle 24 for turning the same. This cross shaft 23 may be provided with means for retaining it in its different positions as for instance, a friction device including a spring 25 located in a recess 26 in the valve chest and engaging the shaft 23.
When it is desired to blow the cuttings out of the hole being bored, the operator may turn the handle 24 and thereby the shaft .23, in a direction to cause the cam 21 to force the pin 20 inwardly against the face of the valve wing .12; thus forcing the valve wing over to a position which will open communication from the motive fluid sup ply 18 to the bore of the drill steel 7, through the front end of the piston chamber 3 and the bore of the hollow anvil block 6. While the controlling valve is held in this position, the operation of the work piston 2 is stopped and the communication between the motive fluid supply and the bore of the drill steel 7 is maintained. When it is desired to again start the operation of the tool, the handle 24; of the shaft 28, is turned in a direction to permit the pin 20 to move outwardly away from its engagement with the valve ring 12 and thereby permit the valve to continue its oscillations.
It is to be understood that the type of valve and the form of the manually controlled device shown herein is not essential to the invention, as I contemplate the use of the invention in connection with valves of any type and manually controlled devices of any type for holding the valve in position to produce the result above set forth. It is also evident that the invention is not to be limited to percussive tools of the type shown and described herein, but may be used in connection with tools of any type wherever applicable.
What I claim is:
1. In a. percussive tool, a pressure fluid operated distributing oscillating valve and means under manual control for holding the valve in one position.
2. In a percussive tool, a pressure fluid operated distributing oscillating valve and means under manual control for holding the valve in position to stop the operation of the tool.
3. In a percussive tool, a hollow drill steel, a pressure fluid operated distributing valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the drill steel.
4. In a percussive tool, a hollow drill steel, a pressure fluid operated distributing oscillating valve and means under manual con trol for holding the valve in position to maintain communication between the motive fluid supply and the drill steel.
5. In a percussive tool, a hollow drill steel, a pressure fluid operated distributing valve and means under manual control for holding the valve in position to stop the operation of the tool and to maintain communication between the motive fluid supply and the drill steel.
6. In a percussive tool, a hollow drill steel, a pressure fluid operated distributing oscillating valve and means under manual control for holding the valve in position to stop the operation of the tool and to maintain communication between the motive fluid supply and the drill steel.
7. In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and one end of the'piston chamber to stop the operation of the piston.
8. In a percussive tool, a work piston. a piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the va ve in position to maintain communication between the motive fluid supply and one end of the piston chamber to stop the operation of the piston.
9. In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the front end of the piston chamber to stop the operation of the piston.
10. In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the front end of the piston chamber to stop the operation of the piston.
11. In a. percussive tool, a work piston, a piston chamber, a hollow drill steel in communication with the piston chamber, a pressure fluid operated piston controlling valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the hollow drill steel through said piston chamber.
12. In a percussive tool, a work piston, a piston chamber, a hollow drill steel in communication with the piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the hollow drill steel through said piston chamber.
13. In a percussive tool, a work piston, a piston chamber, a hollow drill steel in communication with the piston chamber, a pressure fluid operated piston cont-rolling valve and means under manual control for holding the valve in position to stop the operation of the piston and to maintain communication between the motive fluid supply and the hollow drill steel through said piston chamber.
let. In a percussive tool, a work piston, a piston chamber, a hollow drill steel in communication with the piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to stop the operation of the piston and to maintain communication between the motive fluid supply and the hollow drill steel through said piston chamber.
15. In a percussive tool, a work piston, a piston chamber. a hollow drill steel in communication with the front end of the piston chamber, a pressure fluid operated piston controlling valve and means under manual control for holding the valve in position to maintain conmiunication between the motive fluid supply and the hollow drill steel through the front end of the piston chamber.
16. In a percussive tool, a work piston, a piston chamber, a hollow drill steel in compiston controllin stop the operation of the piston and to maintain communication between the motive fluid supply and the drill steel through the front end of the piston chamber. A
18. In a percussive tool,,a work piston, a piston chamber, a hollow drill steel in communication with the front end of the piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to stop the operation of the piston and to maintain communication between the motive fluid supply and the drill steel through the front end of the piston chamber.
19.In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling valve and means under manual control for holding the valve in position to maintain communication between the motive fluid su ply and one end of the piston chamber and close the exhaust from the same end of said chamber.
20. Ina percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual controlfor holding the valve in position to maintain-communication between the motive fluid supply and one end of the piston chamber and at the same time close the exhaust from the same end of said chamber.
21. In a percussive tool, a work piston, a
piston chamber, a pressure fluid operated valve and means under manual control or holding the valve in position to maintain communication, be tween the motive fluid supply and the front endof the piston chamber and at the same time close the exhaust from the front end of said chamber. 22. In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the front end of the piston chamber and at the same time close the exhaust from the front end of said chamber.
at the same time 23. In a percussive tool, a work piston, a piston chamber, a hollow drill steel in communication with the front end of the piston chamber, a pressure fluid operated piston controlling valve and means under manual control for holding the valve in position to maintain communication between the motive' fluid supply and the drill steel through the front end of the piston chamber and at the same time close the exhaust from the front end of said chamber.
24. In a percussive tool, a work piston, a piston chamber, a hollow drill steel in comunication with the front end of the piston c amber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the drill steel through the front end of the piston chamber and at the same time close the exhaust from the front end of said chamber.
25. In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and 'one end of the chamber and at the same time close the exhaust for the same end of said chamber and open the exhaust for the other end of said chamber and close communication between the motive fluid supply and the last named end of said chamber.
26. In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and one end of the chamber and at the same time close the exhaust for the same end of said chamber and open the exhaust for the other end of said chamber and close communication between the motive fluid supply and the last named end of said chamber.
27. In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controllin valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and the front end of the chamber, close communication between the motive fluid supply and the back end of the chamber and at the same time close the exhaust from the front end of said chamber and open the exhaust from the back end ofsaid chamber.
28. In a percussive tool, a work piston, a piston chamber, a pressure fluid operated piston controlling oscillating valve and means under manual control for holding the valve in position to maintain communication between the motive fluid supply and i and the back end of the chamber and at the February 1912.
the front end of the chamber, close comas my invention, I have signed my name in munication between the motive fluid supply presence of two witnesses, this tenth day .of
same time close the exhaust from the front LEWIS C. BAYLES. 5 end of said chamber and open the exhaust Witnesses:
from the back'end of said chamber. F. GEORGE BARRY, In testimony, that I claim the fo 'egoing C. S. SUNDGREN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US67759212A US1080095A (en) | 1912-02-14 | 1912-02-14 | Percussive tool. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US67759212A US1080095A (en) | 1912-02-14 | 1912-02-14 | Percussive tool. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1080095A true US1080095A (en) | 1913-12-02 |
Family
ID=3148329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US67759212A Expired - Lifetime US1080095A (en) | 1912-02-14 | 1912-02-14 | Percussive tool. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1080095A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2575619A (en) * | 1945-11-19 | 1951-11-20 | Ingersoll Rand Co | Rock drill |
| US2725214A (en) * | 1950-10-04 | 1955-11-29 | Sandvikens Jernverks Ab | Sealing device for rock drilling machines |
| US4366868A (en) * | 1978-05-11 | 1983-01-04 | Oy Tampella Ab | Rock drill apparatus |
| US20160328749A1 (en) * | 2007-06-15 | 2016-11-10 | Locator IP, L.P. | Interactive advisory system |
-
1912
- 1912-02-14 US US67759212A patent/US1080095A/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2575619A (en) * | 1945-11-19 | 1951-11-20 | Ingersoll Rand Co | Rock drill |
| US2725214A (en) * | 1950-10-04 | 1955-11-29 | Sandvikens Jernverks Ab | Sealing device for rock drilling machines |
| US4366868A (en) * | 1978-05-11 | 1983-01-04 | Oy Tampella Ab | Rock drill apparatus |
| US20160328749A1 (en) * | 2007-06-15 | 2016-11-10 | Locator IP, L.P. | Interactive advisory system |
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