CH113786A - Cap screw. - Google Patents
Cap screw.Info
- Publication number
- CH113786A CH113786A CH113786DA CH113786A CH 113786 A CH113786 A CH 113786A CH 113786D A CH113786D A CH 113786DA CH 113786 A CH113786 A CH 113786A
- Authority
- CH
- Switzerland
- Prior art keywords
- screw
- recess
- head
- cap screw
- pyramid
- Prior art date
Links
- 230000006378 damage Effects 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B15/00—Screwdrivers
- B25B15/02—Screwdrivers operated by rotating the handle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B15/00—Screwdrivers
- B25B15/001—Screwdrivers characterised by material or shape of the tool bit
- B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
- F16B23/0038—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially prismatic with up to six edges, e.g. triangular, square, pentagonal, Allen-type cross-sections
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Connection Of Plates (AREA)
Description
Kopfschraube. Die vorliegende Erfindung hat eine Kopf schraube zum Gegenstand, die als Holz- und Metallschraube Verwendung finden kann. Der Kopf dieser Schraube kann jede mögliche Form haben, wie-. Versenkkopf, Linsenkopf, Rundkopf, Zylinderkopf. Zum Zwecke des Einschraubens ist in der blatte des Kopfes eine Vertiefung vorgesehen. Diese Vertiefung hat die Form eines Pyramidenstumpfes. Die Seitenflächen haben nach dem Grunde der Vertiefung schwachen Anzug. Der Quer schnitt dieser Vertiefung ist zweckmässig quadratisch, kann aber auch dreieck- oder polygonförrnig sein. Der Grund der Ver tiefung ist zweckmässig pyramidenförmig aus gebildet.
Die Kanten der Vertiefung mit der Oberfläche des Kopfes der Schraube sind zweckmässig schwach gebrochen.
Ein grosser Vorteil dieser Schraube gegen über den heute gebräuchlichen ist die urn vieles grössere mechanische Festigkeit des Schraubenkopfes. Infolge des schwachen An zuges der Seitenflächen der, Vertiefung kann die Schraube auf den Schraubenzieher auf gesteckt werden und ist beim Einschrauben jedes Wackeln der Schraube ausgeschlossen, was ein sicheres und schnelles Arbeiten er- möglicht.
Sind die Kanten schwach gebrochen, so hat die Schraube ein gefälliges Aussehen und Verletzungen an der Schraube sind ausge schlossen. Wenn eine solche Schraube mit dem Hammer eingeschlagen wird, so leidet sie weniger Schaden als eine Schraube mit Schlitz. Eine ganze Serie Schrauben mit verschiedener Grösse können mit der gleichen Vertiefung versehen werden. Nach mehr maligem Ein- und Ausschrauben zeigt die Schraube absolut keine Spuren von Abnützung.
Die Zeichnung zeigt als Ausführungsbei spiel des Erfindungsgegenstandes eine Holz schraube. Die Vertiefung hat die Form eines vierseitigen Pyramidenstumpfes, deren Seiten flächen b nach dem Grunde hin einen schwa chen Anzug (ca. 10 ) haben, und den Sitz für den Schraubenzieher bilden. Der Grund c der Vertiefung ist pyramidenförmig. Die Neigung der Seiten dieser Pyramide zur Schraubenaxe ist ca 60 . Sie kann aber auch geringer sein zum Beispiel 30 .
Die Kanten a der Vertiefung an der Oberfläche des Schrauben kopfes sind schwach gebrochep. Der Schraubenzieher besitzt eineu der Vertiefung entsprechenden Kopf, der nur an den Seitenflächen b anliegt Dadurch wird ein sicherer Sitz erreicht. Die Schraube kann mühelos mit einer Hand eingeschraubt werden.
Cap screw. The present invention has a head screw as an object that can be used as a wood and metal screw. The head of this screw can be any shape, like-. Countersunk head, pan head, round head, cylinder head. For the purpose of screwing in, a recess is provided in the blade of the head. This depression has the shape of a truncated pyramid. After the bottom of the depression, the side surfaces are weak. The cross-section of this recess is expediently square, but can also be triangular or polygonal. The bottom of the recess is expediently formed in a pyramid shape.
The edges of the recess with the surface of the head of the screw are suitably slightly broken.
A major advantage of this screw compared to the one commonly used today is the much greater mechanical strength of the screw head. As a result of the weak attraction of the side surfaces of the recess, the screw can be pushed onto the screwdriver and any wobbling of the screw is excluded when screwing in, which enables safe and quick work.
If the edges are slightly broken, the screw has a pleasing appearance and injuries to the screw are excluded. If such a screw is driven in with a hammer, it will suffer less damage than a screw with a slot. A whole series of screws of different sizes can be provided with the same recess. After screwing it in and out several times, the screw shows absolutely no signs of wear.
The drawing shows a wood screw as Ausführungsbei game of the subject invention. The recess is in the shape of a four-sided truncated pyramid, the sides of which have b towards the bottom a weak chen suit (about 10), and form the seat for the screwdriver. The bottom c of the recess is pyramidal. The inclination of the sides of this pyramid to the screw axis is approx. 60. But it can also be lower, for example 30.
The edges a of the recess on the surface of the screw head are weakly broken. The screwdriver has a head corresponding to the recess, which only rests on the side surfaces b. This ensures a secure fit. The screw can be easily screwed in with one hand.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH113786T | 1925-01-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH113786A true CH113786A (en) | 1926-02-01 |
Family
ID=4372929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH113786D CH113786A (en) | 1925-01-30 | 1925-01-30 | Cap screw. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH113786A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2470282A (en) * | 1947-07-28 | 1949-05-17 | Frederick C Baker | Mounting for shafts and the like |
DE871232C (en) * | 1950-10-31 | 1953-04-13 | Erich Dipl-Ing Aue | Slotted screw |
US2804894A (en) * | 1954-08-20 | 1957-09-03 | Cornwall & Patterson Company | Screw driver |
US4503737A (en) * | 1983-04-11 | 1985-03-12 | Digiovanni Donald | Threaded fastener removing tool |
US5224402A (en) * | 1990-09-05 | 1993-07-06 | Sandvik Aktiebolag | Screw and screwdriver therefor |
ITRN20110005A1 (en) * | 2011-01-24 | 2011-04-25 | Polykap S R L | THREADED CAP SYSTEM AND RELATIVE SCREWDRIVER |
US20230093561A1 (en) * | 2021-09-22 | 2023-03-23 | Chien-Ho WANG | Locking member for building formworks |
US20230092718A1 (en) * | 2021-09-22 | 2023-03-23 | Chien-Ho WANG | Building formwork apparatus having locking member |
-
1925
- 1925-01-30 CH CH113786D patent/CH113786A/en unknown
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2470282A (en) * | 1947-07-28 | 1949-05-17 | Frederick C Baker | Mounting for shafts and the like |
DE871232C (en) * | 1950-10-31 | 1953-04-13 | Erich Dipl-Ing Aue | Slotted screw |
US2804894A (en) * | 1954-08-20 | 1957-09-03 | Cornwall & Patterson Company | Screw driver |
US4503737A (en) * | 1983-04-11 | 1985-03-12 | Digiovanni Donald | Threaded fastener removing tool |
US5224402A (en) * | 1990-09-05 | 1993-07-06 | Sandvik Aktiebolag | Screw and screwdriver therefor |
ITRN20110005A1 (en) * | 2011-01-24 | 2011-04-25 | Polykap S R L | THREADED CAP SYSTEM AND RELATIVE SCREWDRIVER |
EP2479006A1 (en) * | 2011-01-24 | 2012-07-25 | Polykap S.R.L. | Threaded plug and screwdriver device |
US20230093561A1 (en) * | 2021-09-22 | 2023-03-23 | Chien-Ho WANG | Locking member for building formworks |
US20230092718A1 (en) * | 2021-09-22 | 2023-03-23 | Chien-Ho WANG | Building formwork apparatus having locking member |
US11976478B2 (en) * | 2021-09-22 | 2024-05-07 | Chien-Ho WANG | Building formwork apparatus having locking member |
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