Cutlery – Handles and blade connections – Shear or nipper type
Patent
1990-10-15
1992-05-05
Watts, Douglas D.
Cutlery
Handles and blade connections
Shear or nipper type
30232, 30254, B26B 1312
Patent
active
051096080
DESCRIPTION:
BRIEF SUMMARY
The invention relates to scissors, in particular hairdresser's scissors, with a longer handle, a finger loop as well as a shorter handle and a pivotable finger loop, wherein the pivotable finger loop is pivotably mounted in an axis, which extends obliquely relative to the centre line of the scissors.
Such scissors are known. They have the advantage as compared with scissors in which the finger loop of the movable scissor half is fixedly arranged that the finger loop fully engages the thumb with its inner surface when the thumb is pushed therethrough and remains in this position during operation of the scissors. This has as a result that even in the case of longer and extended use of the scissors, no pressure marks will be produced at the thumb and stresses of the wrist will be avoided.
Scissors of the type named above are known from German patent No. 8801248.
In the case of such scissors, the thumb finger loop at the shorter handle as well as the finger loop at the longer handle exhibit a bolt which is pivotably mounted in a bore of a bushing provided for at the end of the corresponding handle in a rectangular position to the longitudinal axis of the handle.
Herewith the finger loops are pivotable with regard to an axis extending approximately in the plane of the scissors and approximately rectangular relative to the longitudinal axis of the scissors.
In order to achieve an ergonomically favorable handling of the scissors at various positions of use, the finger loops of the scissors are also limitedly tiltable with regard to an axis extending also in the plane of the scissors, however approximately parallel to the longitudinal axis of the scissors.
Due to the bushings for the rotary connection and the additional tiltable connection provided for at the ends of the handles, the mounting of the finger loops at the handles is relatively expensive with regard to the technical production. In addition, the scissors noticeably deviate from conventional shapes of hairdresser's scissors and look plump because of the bushings positioned at the ends of the handles normal to the longitudinal axis of the scissors and the finger loops directed outwardly and mounted in these bushings. Therefore a considerable number of hairdressers do not use these scissors in spite of their ergonomical advantages. In addition, the plump shape causes the hairdresser's to assume that the scissors are relatively heavy by weight and that therefore their handling is impaired. For this reason the hairdresser prefers conventional scissors, which however do not exhibit the ergonomical advantages.
Scissors of the type named above are also known from, U.S. Pat. No. 4,742,617. In the case of these scissors the thumb finger loop at the shorter handle is mounted at the shorter handle by a flexible connection member, which engages through an opening at the end of the handle by a flexible pin and through an opening at the finger loop by a flexible pin in such a way that its central axis forms an angle between 30.degree. C. and 60.degree. C. with the longitudinal axis of the scissors in the plane of the scissors and perpendicular to the plane of the scissors also at an angle between 30.degree. and 60.degree.. In these planes the finger loop is pivotable in a limited manner. The disadvantages mentioned above also apply to these scissors published subsequently.
It is the object of the invention to simplify and to improve the mounting of the movable finger loop destined for receiving the thumb and provided at the movable scissor half of the scissors of the kind mentioned at the beginning, namely under a large maintenance of the conventional shape of hairdresser's scissors.
A solution to this object is to mount at the shorter handle a handle ring with two pins, mounted inside, which are positioned in an axis arranged obliquely relative to the centre line of the scissors and which engage in bores of the pivotable finger loop.
The simple manner of arrangement of the movable finger loop in the handle ring allows production of the scissor halves with the handle
REFERENCES:
patent: 927058 (1909-07-01), Krouse
patent: 4254551 (1981-03-01), Megna et al.
patent: 4642895 (1987-02-01), Gauvry
patent: 4742617 (1988-05-01), Gauvry
Dexter Clark F.
Watts Douglas D.
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