DE1910499U - HANDHAMMER, IN PARTICULAR LOCKER'S HAMMER AND MASON'S HAMMER. - Google Patents

Description

RA.72 <t800 * H.1t62

. November 13, 1962

Patent attorney Dr. Scliie / E

BÖBLIM

Bahnhofstrasse 14 Telephone 7319

Applicant: Wolfgang Röcker in Ofterdingen / Württ. "near Tübingen Bachsatzstrasse 35

Hand hammers , especially engineer's hammers and mason hammers

The novelty "concerns a hand hammer made of tool steel or the like. Existing hammer head wedged with the hammer handle or whose hammer handle is driven into the hammer head or whose hammer head is otherwise attached to the hammer handle is stuck and secured.

The innovation for this is that the hammer handle is made of elastic and thermoplastic plastic with high impact resistance exists and is hollow in its longitudinal axis.

The material of the hollow hammer handle is advantageously according to a special embodiment of the concept of innovation a copolymer of acrylonitrile, butadiene and styrene, also known as ABS polymer. While the impact resistant Polystyrenes only consist of two components, be it acrylonitrile and styrene or butadiene and styrene, the ABS polymer is based on all three monomers mentioned. In order to you get a hammer with very high impact resistance, connected with a good flexibility. The amount of shrinkage is practically negligible compared to the wooden handle.

According to another advantageous embodiment of the concept of innovation the material of the hollow hammer handle is a thermoplastic based on a higher esterified one Cellulose acetates. Taken together, it gives the hammer

increased strength and dimensional stability.

According to a further advantageous embodiment of the concept of innovation the material of the hollow hammer handle is a polyamide based on CaprοIacturn, which the hammer as a whole also gives high mechanical strength, in particular impact and notched impact strength.

The hollow handle of the hammer can straighten after the rise in prices or curved, and can have a round or oval cross-section, i.e. it can have the shape of the previously usual Be adapted to hammer wood handle.

The hammer after the price increase has compared to the known Hammer with a wooden handle has the advantage of missing branches and missing weak spots on the handle. The innovation is opposite to the acquaintance also insensitive to temperature and weather influences. Another benefit is in it see that when the price rises, the hammer head remains more permanently connected to the hollow handle, so that it is less light can fly off than the hammer head on the wooden handle. By warming up the hollow hammer handle or by thermoplastic Welding or hot deformation can, for example, be more advantageous Way, a very durable connection between hammer head and hollow hammer handle can be achieved with the innovation. To the local If necessary, a hot air device can be used for heating.

The inflation is explained in more detail below with reference to the drawing for an example embodiment:

In the drawing, 1 denotes the steel hammer head with the hole 2 and 3 the thermoplastic material, namely from a copolymer of acrylonitrile, butadiene and styrene, or from a material based on a higher esterified cellulose acetate or of a material on the

Basis τοπ Oaprolactum existing holilstiel. The axially continuous long) ear of this stem is marked with 4 ".

If necessary, this hollow hammer handle can be produced in this way be that color equality with a hammer wood handle, especially with an ash wood handle is available. This leaves can be achieved, for example, by mixing other plastics into the base material.

The delivery of the hammer head 1 on the hollow hammer handle 3 can be set up releasably in the innovation in a manner known per se and e.g. with the help of flat or round wedges made of metal or wood or of the same thermoplastic Material such as the stem can be made. In this case, the securing wedge 5 is expediently in the upper part of the axial bore 3 driven.

The thermoplastic hollow handle 3 can of course be expedient also tapered conically in the upper part.

Other beneficial uses of hiring are in addition to that Engineers hammer, riveting hammer and mason's hammer, i.e. in addition to hammers with small handles, also pointed axes and pickaxes and splitting axes for woodcutters.

In the case of the color of the thermoplastic hollow hammer handle, bright colors can of course also be provided, which e.g. can have the advantage of being easier to find when laying.

The axial bore 4 of the hollow hammer handle after firing is advantageously oval in the case of the drawing with oval stems, as can be seen in the cross-sectional sketch. at Round handles, it is useful to choose the longitudinal hole 4 round.

Protection claims

Claims (5)

i.72UÜÖ * n.11. Protection claims 1.) Hand hammer, especially machinist's hammer and bricklayer's hammer with a hammer head made of tool steel that is keyed to the hammer handle or the handle of which is driven into the hammer head or whose hammer head is stuck to the hammer handle in any other way and secured, characterized in that, that the hammer handle is made of elastic and thermoplastic plastic of high impact resistance and in its longitudinal axis is hollow. 2.) Hand hammer according to claim 1, characterized in that the material of the hollow hammer handle consists of a copolymer Is acrylonitrile, butadiene and styrene. 3.) Hand hammer according to claim 1, characterized in that the material of the hollow hammer handle is a thermoplastic Plastic based on a higher esterified cellulose acetate is. 4.) Hand hammer according to claim 1, characterized in that the material of the hollow hammer handle is a polyamide on the Base on Caprolactum is. 5.) Hand hammer according to claims 1 to 4, characterized in that that the hollow hammer handle is identical to a hammer wood handle, in particular with an ash wood handle, which is produced by mixing other plastics into the base material.