US175672A - Improvement in chisels for cutting holes in masonry - Google Patents
Improvement in chisels for cutting holes in masonry Download PDFInfo
- Publication number
- US175672A US175672A US175672DA US175672A US 175672 A US175672 A US 175672A US 175672D A US175672D A US 175672DA US 175672 A US175672 A US 175672A
- Authority
- US
- United States
- Prior art keywords
- masonry
- chisels
- improvement
- cutting holes
- tool
- 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
- 102100000672 SMPX Human genes 0.000 description 8
- 108060007673 SMPX Proteins 0.000 description 8
- 239000000428 dust Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 230000003247 decreasing Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/36—Percussion drill bits
- E21B10/38—Percussion drill bits characterised by conduits or nozzles for drilling fluids
Definitions
- the object of my invention is to provide a hand tool or chisel by which holes may be cut through brick and stone walls with ease, rapidity, and accuracy; and to this end it consists in a round chisel having its forward end made of a tubular form, and provided with a series of pointed teeth or cutting-lips.
- Figure 1 represents a side view of my improved tool; Fig. 2, a longitudinal central section of the same; Fig. 3, an end or face view of the same.
- the tool consists simply of a round steel rod, A, provided with a central opening, a, from its point inward, and with a series of pointed saw-like teeth, b, on its annular cutting end, as shown.
- the tool is made of decreasing diameter from its point toward its head.
- the central space not only receives the dust and chips, so as to avoid the necessity of frequently withdrawing the tool, as usual, but also leaves a free clean surface for the teeth to act upon, and reduces the amount of surface to be cut an amount equal to the area of the opening.
Description
A. H. CRUMP. CHISELS FOR CUTTING HOLES IN MASONRY.
Patent ed April 4, 1876.
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UNITED STATES PATENT Ornrcn,
ALBERT H. URUMP, OF PHILADELPHIA, PENNSYLVANIA.
IMPROVEMENT IN CHISELS FOR CUTTING HOLES IN MASONRY;
Specification forming part of Letters Patent No. 175,672, dated April 4, 1876; application filed March 14, 1876.
To all whom it may concern Be it known that I, ALBERT H. URUM1, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain Improvements in Chisels or Drills for Cutting Holes in Masonry, of which the following is a specification:
The object of my invention is to provide a hand tool or chisel by which holes may be cut through brick and stone walls with ease, rapidity, and accuracy; and to this end it consists in a round chisel having its forward end made of a tubular form, and provided with a series of pointed teeth or cutting-lips.
Figure 1 represents a side view of my improved tool; Fig. 2, a longitudinal central section of the same; Fig. 3, an end or face view of the same.
The tool consists simply of a round steel rod, A, provided with a central opening, a, from its point inward, and with a series of pointed saw-like teeth, b, on its annular cutting end, as shown. By preference the tool is made of decreasing diameter from its point toward its head. I In using the tool it is driven sharply forward by repeated blows of a hammer, and at the same time given a slow rotary motion. The series of pointed teeth acting all at the same time, out an annular hole into the masonry with great rapidity, leaving a central core, which, with the dust and chips, enters the center of the tool, from which the small particles escape through a side opening, 0. (Shown in the drawings.) The central space not only receives the dust and chips, so as to avoid the necessity of frequently withdrawing the tool, as usual, but also leaves a free clean surface for the teeth to act upon, and reduces the amount of surface to be cut an amount equal to the area of the opening. By leaving the central opening, and thereby reducing the amount of cutting required, and at the same time providing the series of teeth, the tool is enabled to cut with a speed far beyond that of those constructed in the ordinary manner.
Having thus described my invention, what I claim isv 1 1. The hollow toothed chisel, constructed substantially as shown and described.
2. The hollow chisel A, provided with the series of pointed teeth I) and the dischargeopening 0.
ALBERT H. GRUMP.
Witnesses:
FRANK MCBRIDE, THos. M. DEVINE.
Publications (1)
Publication Number | Publication Date |
---|---|
US175672A true US175672A (en) | 1876-04-04 |
Family
ID=2245079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US175672D Expired - Lifetime US175672A (en) | Improvement in chisels for cutting holes in masonry |
Country Status (1)
Country | Link |
---|---|
US (1) | US175672A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3015365A (en) * | 1959-08-18 | 1962-01-02 | Griffin Wellpoint Corp | Sliding weight holepuncher for the installation of wellpoints |
US3308897A (en) * | 1963-11-06 | 1967-03-14 | Becker Drilling Alberta Ltd | Earth coring punch and drive apparatus therefor |
US3889570A (en) * | 1973-02-16 | 1975-06-17 | Constantine D Polos | Self-drilling anchor device |
US4223587A (en) * | 1978-02-27 | 1980-09-23 | Hilti Aktiengesellschaft | Self-drilling dowel assembly with an annular drill bit |
US4280573A (en) * | 1979-06-13 | 1981-07-28 | Sudnishnikov Boris V | Rock-breaking tool for percussive-action machines |
-
0
- US US175672D patent/US175672A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3015365A (en) * | 1959-08-18 | 1962-01-02 | Griffin Wellpoint Corp | Sliding weight holepuncher for the installation of wellpoints |
US3308897A (en) * | 1963-11-06 | 1967-03-14 | Becker Drilling Alberta Ltd | Earth coring punch and drive apparatus therefor |
US3889570A (en) * | 1973-02-16 | 1975-06-17 | Constantine D Polos | Self-drilling anchor device |
US4223587A (en) * | 1978-02-27 | 1980-09-23 | Hilti Aktiengesellschaft | Self-drilling dowel assembly with an annular drill bit |
US4280573A (en) * | 1979-06-13 | 1981-07-28 | Sudnishnikov Boris V | Rock-breaking tool for percussive-action machines |
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