PL14472B3 - 1. J U 18. ' Swider moles. - Google Patents
1. J U 18. ' Swider moles. Download PDFInfo
- Publication number
- PL14472B3 PL14472B3 PL14472A PL1447230A PL14472B3 PL 14472 B3 PL14472 B3 PL 14472B3 PL 14472 A PL14472 A PL 14472A PL 1447230 A PL1447230 A PL 1447230A PL 14472 B3 PL14472 B3 PL 14472B3
- Authority
- PL
- Poland
- Prior art keywords
- swider
- moles
- blade
- quadrate
- fact
- Prior art date
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- 230000001154 acute effect Effects 0.000 claims description 2
- 238000005553 drilling Methods 0.000 description 2
Description
Najdluzszy czas trwania patentu do dnia 29 stycznia 1946 r.Przy próbach, dokonywanych swidrem wedlug patentu Nr 13016, okazalo sie, ze osiaga sie znacznie lepsze wyniki, jezeli jedno z ostrzy .posiada ksztalt pieciokata, którego górne krawedzie tworza kat ostry, przyczemi wystaja one wiecej, niz drugie ostrze czworograniaste. Podczas wiercenia dziala najpierw ostrze ostrokatne, a na¬ stepnie ostrze plaskie, wiercenie jest wiec latwe. Ostrza, zuzywajac sie, zachowuja nawet przy szlifowaniu stale swój ksztalt.Na rysunku fig. 1 przedstawia przyklad wykonania wynalazku w widoku zprzodu, fig. 2 — w widoku zboku, fig. 3 — otwór wiercony takim swidrem, fig. 4 — ostrze pieciokatne, a fig. 5 — ostrze czworokatne. PLThe longest duration of the patent until January 29, 1946 When attempting to use a drill according to patent No. 13016, it turned out that much better results are achieved if one of the blades has a five-angle shape, the upper edges of which form an acute angle, while they protrude more than a second square blade. When drilling, a sharp point is operated first and then a flat point is operative, so drilling is easy. The blades, with wear, keep their shape even during grinding. Fig. 1 shows an embodiment of the invention in a front view, Fig. 2 - side view, Fig. 3 - a hole drilled with such a drill, Fig. 4 - triangular blade, and Figure 5 shows a square blade. PL
Claims (5)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL14472B3 true PL14472B3 (en) | 1931-10-31 |
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