DE9002085U1 - screwdriver - Google Patents

Description

DIpI.-Ing. KLAUS WESTRHAL''I I .* * VTjjdstnfese 33 Telephone (0^721) 56007

····· ·· ·· ·· Telex 7921573wemud

Dr. rer.nat. BERND MUSSGNUG D-7730 VS-VILUNGEN Fax (07721) 55164 Dr.rer.nat.OTTO BÜCHNER Ftossmannstrasse30a Telephone(088)832446 Patent Attorneys D-8000 MUNICH 60 Fax (089) 8340966 European Patent Attorneys

hahO13

Willi Hahn GmbH & Co. KG Obertalstrasse 3-7

7745 Schoeach

The invention relates a., -s. a screwdriver according to the preamble of claim 1 or 2.

In addition to screwdrivers, in which the blade and handle form a solid, inseparable unit, there are also screwdrivers of this type with replaceable blades. The number of blade shapes and lengths determine the possible uses of the screwdriver. Since the number of blade shapes and lengths is limited, the range of uses for these screwdrivers is also limited.

The invention is based on the object of creating a screwdriver that has an expanded range of applications.

This object is achieved according to the invention in a screwdriver of the generic type by the features mentioned in the characterizing part of claims 1 and 2 respectively.

Advantageous embodiments of the invention are specified in the subclaims.

Postgiroamt: Karlsruhe 76979-754 ^: fl&nkko.nio: German ^fik«Ad WINngen (bank code 69470039) 146332

The adjustability of the blade's useful length according to the invention allows for easy adaptation to the respective intended use. According to the invention, a blade with different engagement profiles at the two ends can also be used, whereby the number of ns»rrv ,ed blades can be reduced.

The drawing shows an embodiment of the subject matter of the invention.

Show it

Fig. 1 - a longitudinal section of a screwdriver, Fig. 2 - a section along the line II-II in Fig.

Fig. 3 - the handle end of the screwdriver in a modified version.

The screwdriver consists of a handle 1 made of plastic with a central coaxial profile hole 3, which has a hexagonal profile in cross section. A cap 2 is rotatably attached to the end of the handle, which can be designed to be captive or removable. According to Fig. 3, the end of the handle can also be made in one piece without a cap. At its front end, the handle 1 merges into a threaded part 4, which has two diametrically arranged axial slots 5. A union nut 6 with an inner cone 8 is screwed onto the threaded part 4. The inner cone 8 works together with a clamping cone that is connected to the front of the threaded part 4 in order to create a

hole 3 in any longitudinal position. Alternatively, the union nut 6 and the threaded part 4 can each be designed with a conical thread to tighten the blade 7. The blade 7 has a hexagonal profile in cross section that matches the profile of the profile hole 3. This means that the blade 7 is held in the handle 1 so that it cannot rotate. At both ends, the blade 7 has two different or similar engagement profiles, e.g. a protective or cross-slot profile.

The screwdriver according to the invention has a wide variety of possible uses, since the usable blade length can be changed quickly and easily. In addition, the same blade can be used for different screw head shapes, which further increases the range of uses of the screwdriver.

Claims (1)

DIpI. -Ing. KLAUS WESTPtfAL.' ·; ; ,· · WeWftraise 33 Telephone (07721) 50007 ..* Telex 7921573 wemud Dr. rer.nat. BERND MUSSGNUG D-7730 VS-VILLINGEN Tel./(07721) 55164 Dr. rer. nat. OTTO BÜCHNER Flossmannstrasse 30a Telephone (089) 832446 n.-rcK.-r.^ ,., « . -r^ Telex 5 213177 webu d PATENTA NWA LTE D-8000 MUNICH 60 Fax (089) 8340966 European Patent Attorneys hahO13 PROTECTION CLAIMS Screwdriver with a handle and a blade which can be clamped detachably and non-rotatably by means of a union nut in a bore of the handle, characterized in that the bore is a profile bore (3) and the blade (7) can be clamped in the profile bore (3) in an axially adjustable manner in its usable length. Screwdriver with a handle and a blade which can be clamped detachably and non-rotatably by means of a union nut in a bore of the handle, characterized in that the blade (7) has an engagement profile (9) at both ends for turning screws. 3. Screwdriver according to claim 1 and/or 2, characterized in that the union nut (6) can be screwed onto a slotted threaded part (4) formed integrally on the handle (1). 4. Screwdriver according to claim 3, characterized in that the threaded part (4) has a clamping cone cooperating with an inner cone (8) of the union nut (6) Postgiroamt Karlsruhe 78979-754 iBaiilfconte: German· BinfcAG {«fingen (BLZ 69470039) 146332 having. 5. Screwdriver according to at least one of the preceding claims, characterized in that (3 on the rear
A rotatable cap (2) is arranged at the end of the handle (1). 6. Screwdriver according to at least one of the preceding claims, characterized in that the blade (7) has a cross-section that is non-circular and corresponds to the profile of the profile bore (3). 7. Screwdriver according to claim 6, characterized in that the blade (7) and the profile bore (3) each have a polygonal profile, in particular a hexagonal profile,
exhibit.