Surgery – Instruments – Cutting – puncturing or piercing
Patent
1988-08-31
1991-01-22
Rosenbaum, C. Fred
Surgery
Instruments
Cutting, puncturing or piercing
63 13, A61B 1734
Patent
active
049868292
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an ear piercing device comprising a piercing pin intended to pierce the ear with a high velocity by means of a piercing pistol and a rear piece, carried by the piercing pistol and having an opening, the rear piece being intended to receive the forward end of the pin and to arrest the motion of the pin and to hold it securely, the opening of the retaining or rear piece being intended to be penetrated by the end of the pin.
TECHNICAL PROBLEM
The prevalent technique for piercing ears for earrings consists of shooting a piercing pin through the ear by means of a piercing pistol and securing it in a rear piece which is held by the pistol on the other side of the ear. A piercing pin is shot through the ear lobe and against the rear piece with relatively high velocity. This movement must be stopped when the pin is at a certain position relative to the ear lobe. With pins according to the prior art, the forward part of the pin was narrower than the rear part. The rear piece was formed with a hole arranged to receive only the forward part of the pin, whereby the pin was stopped in the hole, since it was not large enough to receive the rear part of the pin. It has been possible to choose this design when using pins of metal, but it is not satisfactory for use with pins made of, e.g., polymer materials. Metal can however lead to hypersensitivity reactions in the wearer polymer materials have proved to be very suitable in these situations.
The object of the present invention is to provide a device in which the piercing pin, which is shot at high velocity into the rear piece, may be made of a different material than metal so that it is stopped and held securely in the correct position in the rear piece.
THE SOLUTION
Said object is achieved by means of the device in accordance with the present invention, which is characterized in that the rear piece exhibits an end stopper for the forward end of the pin located directly in front of said opening in such a way that the end stopper is arranged to constitute a stop surface for the forward end of the pin, by means of which the pin is slowed to a stop when the pointed end is inserted into the counterbore.
The invention will be described in greater detail below using an exemplifying embodiment with reference to the accompanying drawings, in which FIG. 1, on a greatly enlarged scale, shows a partially broken view of a pin included in the device according to the invention; FIG. 2 is an end view of the pin; FIG. 3 is a view of a rear piece included in the device; FIG. 4 is a sectional view through the rear piece along the line IV--IV in FIG. 3; and FIG. 5 is a view of the device with the pin secured in the rear piece.
As is seen in the figures, the device according to the invention consists of two main members, namely, a pin 1 and a rear piece 2. The pin exhibits a generally cylindrical, longitudinally extending portion 3 with a pointed forward end 4 having a suitably conic form. Located near the pointed end 4, and spaced from it, a waist portion 5 is provided, i.e., a portion having a somewhat smaller diameter than the diameter of the rest of the cylindrical portion 3. Transition between the thicker cylindrical portion 3 and the mainly cylindrical waist portion 5 is provided by conical bevels 6, 7. At the opposite end, relative to the pointed end 4, a widened portion 8 is provided having a supporting surface 9 for contact against the ear around the hole made in the ear. The widened portion 8 has a recess 10 intended to form a setting for an ornamental stone or the like. The setting is mainly conical with an annular flange 11 which permits setting the stone without the need for adhesive; rather, the stone may be held securely by means of snapping action.
The rear piece 2 exhibits a disc portion 12 with an opening 13 which has a central portion 14 which permits passage of the pin 1, as well as crossing slits 15, so that protruding locking wings 16 with locking edges 17 are formed, which are intended to cooperate with the oute
REFERENCES:
patent: 3943935 (1976-03-01), Cameron
patent: 4030507 (1977-06-01), Mann
patent: 4164224 (1979-08-01), Hastings
patent: 4513746 (1985-04-01), Aranyi et al.
patent: 4631929 (1986-12-01), Hollingworth
Lars Blomdahl AB
Lewis William
Rosenbaum C. Fred
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