DE375221C - Schraem rod - Google Patents
Schraem rodInfo
- Publication number
- DE375221C DE375221C DEC32117D DEC0032117D DE375221C DE 375221 C DE375221 C DE 375221C DE C32117 D DEC32117 D DE C32117D DE C0032117 D DEC0032117 D DE C0032117D DE 375221 C DE375221 C DE 375221C
- Authority
- DE
- Germany
- Prior art keywords
- rod
- thread
- edge
- schraem
- picks
- 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
- 238000005520 cutting process Methods 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 239000003245 coal Substances 0.000 description 2
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
- E21C25/10—Rods; Drums
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling Tools (AREA)
Description
Die bisher üblichen Schrämstangen besitzen Picken, deren Schneidflächen manchmal schräg so angeordnet sind, daß sie zusammen einen Schraubengang zur Beförderung des Bohrmehles bilden.The cutting bars customary up to now have picks, their cutting surfaces sometimes are arranged obliquely so that they together form a screw thread for conveying the drill cuttings.
Nach der Erfindung werden die gewinde· förmig angeordneten Picken außer mit einer Brechkante mit einer schräg zur Achse verlaufenden Mahlkante versehen. Während dieAccording to the invention, the picks arranged in the form of a thread are except for one Provide the breaking edge with a grinding edge that runs obliquely to the axis. While the
ίο Brechkante in der Drehrichtung in der üblichen Weise wirkt, bestreicht die Mahlkante den Zwischenraum zwischen den Brechkanten und zermalt die dort befindliche Kohle. Die Seitenflächen, an deren oberem Rande sich die Mahlkanten befinden, steigen etwa senkrecht von der Stange auf.ίο Breaking edge in the direction of rotation in the usual Acts wisely, the grinding edge sweeps the space between the crushing edges and crushes the coal located there. the Side surfaces, on the upper edge of which the grinding edges are located, rise approximately vertically off the shelf.
In der Zeichnung ist eine Ausführungsform der Schrämstange teils in Ansicht und teils im Schnitt dargestellt.In the drawing, an embodiment of the cutting rod is partly in view and partly shown in section.
Aus dem Schaft α der Stange ist eine gewindegangformige Auflage b ausgearbeitet, und diese ist durch drei eingefräste Längsnuten c, d, e in einzelne Stücke zerlegt, von welchen jedes eine Picke mit vordererA thread-shaped support b is worked out from the shaft α of the rod, and this is broken down into individual pieces by three milled longitudinal grooves c, d, e , each of which has a pick with the front
»5 Schneidfläche und schraubenförmiger, seitlicher Mahlkante g· hildet. Mit dieser Stange kann lediglich durch Drehen ohne die sonst erforderliche hin und her gehende Bewegung ein Schräm erzeugt werden, da die Mahlkante g der Picken stets die Kohle, welche die vorderen Pickenschneiden stehenlassen, vollkommen beseitigen. Es genügt zu ihrem Antrieb somit beispielsweise ein einfacher Drehkolbenmotor.»5 cutting surface and helical, lateral grinding edge formed. With this rod, a bevel can be produced simply by turning it without the otherwise necessary reciprocating movement, since the grinding edge g of the pecks always completely eliminates the coal which the front pecker blades leave behind. A simple rotary piston engine, for example, is sufficient to drive them.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEC32117D DE375221C (en) | Schraem rod |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEC32117D DE375221C (en) | Schraem rod |
Publications (1)
Publication Number | Publication Date |
---|---|
DE375221C true DE375221C (en) | 1923-05-09 |
Family
ID=7020146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEC32117D Expired DE375221C (en) | Schraem rod |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE375221C (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2567084A (en) * | 1947-05-23 | 1951-09-04 | Termite Drills Inc | Bit |
US2728558A (en) * | 1952-06-26 | 1955-12-27 | New England Carbide Tool Compa | Masonry drill |
US3421591A (en) * | 1966-12-27 | 1969-01-14 | Webb James E | Rock drill for recovering samples |
US4953642A (en) * | 1989-03-20 | 1990-09-04 | Skaggs Roger D | Rock drill bit |
US5366032A (en) * | 1993-06-09 | 1994-11-22 | Kay Mark A | Rock bit |
EP1621274A1 (en) * | 2004-07-27 | 2006-02-01 | BLACK & DECKER INC. | A drill bit |
-
0
- DE DEC32117D patent/DE375221C/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2567084A (en) * | 1947-05-23 | 1951-09-04 | Termite Drills Inc | Bit |
US2728558A (en) * | 1952-06-26 | 1955-12-27 | New England Carbide Tool Compa | Masonry drill |
US3421591A (en) * | 1966-12-27 | 1969-01-14 | Webb James E | Rock drill for recovering samples |
US4953642A (en) * | 1989-03-20 | 1990-09-04 | Skaggs Roger D | Rock drill bit |
US5366032A (en) * | 1993-06-09 | 1994-11-22 | Kay Mark A | Rock bit |
EP1621274A1 (en) * | 2004-07-27 | 2006-02-01 | BLACK & DECKER INC. | A drill bit |
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