Handling: hand and hoist-line implements – Grapple – Resilient jaws
Patent
1991-04-15
1992-08-11
Focarino, Margaret A.
Handling: hand and hoist-line implements
Grapple
Resilient jaws
294 992, A01M 300
Patent
active
051373181
DESCRIPTION:
BRIEF SUMMARY
This invention concerns a support means for a pair of tweezers or like gripping devices comprising one or more support legs associated with the tweezers or gripping means, which support leg or legs are intended to stabilize and support the tweezers for a more precise handling of the latters when picking objects and to enable rotation of the picked objects while maintaining support.
Previously known tweezers or like gripping means lack such a support means, and for elderly people with a bit shaky hands who have difficulty in holding the tweezers steady in a correct position there is a problem, for example, in removing a splinter from a wound without hurting themselves with the tweezers tips.
Also for surgical and veterinary purposes, tweezers and other like gripping devices are difficult to handle with precision, and in electronic industry mounting of chips and other small size components demands a very precise handling of tweezers.
A specific application for tweezers is within the veterinary field, namely for removal of ticks from animals like dogs and cats. Ticks are removed by gripping and rotation. It is not until a tick has been rotated about one and a half revolutions that it will lose its grip such that it can be lifted away. If not rotated, there is a risk the head of the tick is left when a lifting force is applied on the tick. This increases the risk for infections on the treated animal. Performing a combined gripping and rotating movement with a prior art pair of tweezers is very difficult or almost impossible. Usually the handling of the tweezers has to be performed with one hand only since the other hand is occupied holding the dog or cat.
The main purpose of the invention is to accomplish a support means for a gripping device, such as a pair of tweezers, by which a stabilizing support of the tweezers relative to the working object is obtained for facilitating gripping, locating or removal of objects, and which enables rotation of the objects with the stabilizing support maintained.
Preferred embodiments of the invention are below described in detail with reference to the accompanying drawings.
In the drawings:
FIG. 1 shows a side view, partly in section, of a pair of tweezers provided with a support device according to the invention.
FIG. 2 shows a side view of a pair of tweezers according to another embodiment of the invention.
FIG. 3 shows a cross section along line A--A in FIG. 2 with a modified support base.
FIG. 4 shows a cross section along line B--B in FIG. 2.
FIG. 5 shows a side view of a pair of tweezers according to still another embodiment of the invention.
FIG. 6 shows an end view of the tweezers in FIG. 5.
FIG. 7 shows a side view partly in section, of a pair of tweezers provided with a support means according to a further embodiment of the invention.
The tweezers shown in FIG. 1 comprises two legs 1, 2 which are formed as a common portion in the shape of a cylindrical common member or spindle 3. At its rear end, this spindle has an outer thread and is provided with an extension 4 with a smaller diameter. A support leg 6 is connected to the spindle 3 via a cross piece 9 and a sleeve 5 for enabling rotation as well as axial displacement. On the thread of the spindle 3, there is mounted a nut 7 formed of, for instance, a fiber material for increased friction. This nut 7 acts as an axial stop for the sleeve 5. Accordingly, the axial stop is adjustable and enables the axial position of the sleeve 5 and the support leg 6 to be varied.
Around the rear ends of the tweezers legs 1, 2, there is mounted a sleeve 8 which is displaceable along the legs 1, 2. Since the rear ends of the legs 1, 2 diverge in the forward direction, a forward directed movement of the sleeve 8 accomplishes a compression of the legs 1, 2. At retraction of the sleeve 8 to the position illustrated in FIG. 1, the tweezer legs open due to the elastic forces stored in the material as in conventional tweezers. The tweezers may consist of metal or plastics. To bring down the manufacturing costs, the tweezers and the sleeve
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patent: 4304398 (1981-12-01), Crowell
patent: 4442837 (1984-04-01), Keatley
patent: 4768288 (1988-09-01), Culbertson
patent: 4802703 (1989-02-01), Gabel
patent: 5002323 (1991-03-01), Idsund
Focarino Margaret A.
Pape Joseph D.
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