Buckles – buttons – clasps – etc. – Article holder attachable to apparel or body – Article held by clip with spring member
Reexamination Certificate
2000-02-18
2001-07-03
Sakran, Victor N. (Department: 3626)
Buckles, buttons, clasps, etc.
Article holder attachable to apparel or body
Article held by clip with spring member
C024S003100, C024S003120, C024S598700, C024S633000
Reexamination Certificate
active
06253420
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a clamping assembly, comprising a base part, a clamping part, a pivot pin and spring means, the base part and the clamping part having projections on sides which lie opposite one another, which projections have passages which are aligned with one another and are suitable for receiving and retaining the pivot pin, and the spring means being suitable for pushing one end of the clamping part against the base part.
The invention relates in particular to a clamping assembly of this kind for attaching an electronic unit, such as a radio pager, to an item of clothing.
BACKGROUND OF THE INVENTION
A clamping assembly consisting of cast material is known in practice. In the known clamping assembly, the passages in both the base part and the clamping part are round openings, i.e. they have a continuous cylindrical wall.
The known clamping assembly has the drawback that a mould for casting the parts requires an axially displaceable pin for each of the openings for the pivot pin. As a result, the mould is relatively complicated and expensive, while the use of the displaceable pin requires additional operations, time and/or energy in order to pull the pin out of the cast material when the material has sufficiently solidified. This considerably increases the cost price of the clamping assembly.
Furthermore, the accuracy of the position and of the dimensions of the passages is dependent on the time and speed at which the pin is pulled out of the cast material. The more quickly the pin is pulled out, the more damaging this will be to the accuracy.
SUMMARY OF THE INVENTION
The object of the invention is to eliminate the above drawbacks.
The clamping assembly of the type mentioned in the preamble is therefore characterized, according to the invention, in that the passage of each projection of one part is formed by a recess which extends from a side of the part which does not have the projections to the side of the part which does have the projections.
As a result, when casting the part with the passages formed by recesses, it is possible to use a simple mould without movable shaping members, with the result that the part can be cast quickly, accurately and inexpensively.
The clamping assembly is preferably characterized in that a passage, which is formed by a recess, has a height from a side of the part which has the projections to a base of the recess which is greater than the diameter of the pivot pin.
As a result, the parts can move towards one another, counter to the action of the spring means, so that a shock-absorbing property is obtained. Furthermore, since the pivot pin has to be pushed through passages whose dimensions are greater than the diameter of the pin, the clamping assembly can be assembled more easily and more quickly.
Preferably, the clamping assembly is moreover characterized in that a dimension of the passage decreases towards the base of the recess, as seen perpendicular to the pivot pin. As a result, the parts moreover have the freedom to rotate slightly with respect to one another, counter to the action of the spring means, about an axis which is perpendicular to the pivot pin. As a result, a further shock-absorbing property is obtained.
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Chan H B et al. “Pager Belt Clip”, Motorola Technical Developments, vol. 12, Apr. 1, 1991, pp. 1-2, Xp000226121.
Burns Doane Swecker & Mathis L.L.P.
Ericsson Radio Systems B.V.
Sakran Victor N.
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