GB718133A - Improvements in rock-drills having an engine assembled therewith - Google Patents
Improvements in rock-drills having an engine assembled therewithInfo
- Publication number
- GB718133A GB718133A GB4763/52A GB476352A GB718133A GB 718133 A GB718133 A GB 718133A GB 4763/52 A GB4763/52 A GB 4763/52A GB 476352 A GB476352 A GB 476352A GB 718133 A GB718133 A GB 718133A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- piston
- ball
- gas cushion
- passage
- 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
Links
- 239000007789 gas Substances 0.000 abstract 11
- 238000002485 combustion reaction Methods 0.000 abstract 3
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
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
- E21B1/00—Percussion drilling
- E21B1/12—Percussion drilling with a reciprocating impulse member
- E21B1/24—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure
- E21B1/30—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure
- E21B1/32—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure working with pulses
- E21B1/34—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure working with pulses the impulse member being a piston of an internal-combustion engine
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (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)
Abstract
718,133. Percussive drills. BERGMAN, G. A. Feb. 22, 1952, No. 4763/52. Class 124. An internal combustion engine driven percussive drill in which the return stroke of the striking piston is produced by a gas cushion has a non-return valve for the delivery of compressed gas to the gas cushion, and a power loaded valve, operating on the attainment of a predetermined pressure in the gas chamber, opens to allow the escape of gas from the gas cushion. As shown, a ball 17 in the exit of a passage 8 from the combustion chamber lifts to admit compressed gas into the gas cushion 7 below a striking piston 4 and is returned to its seating when the pressure due to the downward movement of piston 4 is greater than that in the combustion chamber. A second, spring loaded, ball 22, closing a passage 9 from the gas cushion and leading to an annular space 10 from which the gases escape through a hollow steel 16, opens on downward movement of the piston 4 and before the entrance 27 to the passage 9 is closed by the piston. The pressure required to lift the ball 22 may be adjusted by a screwed plug 25 on which one end of a spring 26 rests, Fig. 3. The ball 17 may be operated by an external source of compressed gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4763/52A GB718133A (en) | 1952-02-22 | 1952-02-22 | Improvements in rock-drills having an engine assembled therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4763/52A GB718133A (en) | 1952-02-22 | 1952-02-22 | Improvements in rock-drills having an engine assembled therewith |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB718133A true GB718133A (en) | 1954-11-10 |
Family
ID=9783326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4763/52A Expired GB718133A (en) | 1952-02-22 | 1952-02-22 | Improvements in rock-drills having an engine assembled therewith |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB718133A (en) |
-
1952
- 1952-02-22 GB GB4763/52A patent/GB718133A/en not_active Expired
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