Dentistry – Apparatus – Hand manipulatable implement
Reexamination Certificate
2008-01-15
2008-01-15
Lewis, Ralph A. (Department: 3732)
Dentistry
Apparatus
Hand manipulatable implement
C081S416000, C606S208000
Reexamination Certificate
active
07318725
ABSTRACT:
Dental pliers with two pliers parts, each respectively comprising one jaw of a pliers mouth and one lever arm of a pliers grip, the pliers parts pivotably connected with each other via a linkage. The linkage includes a cylindrical journal (26) on the first pliers part (12) coaxial to the pivot axis, which engages in a cylindrical bore (32) on the other pliers part (10) coaxial to the pivot axis having the same diameter, and is rotatable in this bore (32) about the pivot axis. The journal (26) and the bore (32) are axially located form-fittingly via at least one circumferential tab (28) and one circumferential groove (34). The at least one circumferential tab (28) extends only over a partial angular area of the circumference. At least one entry segment (36) corresponding to the cross-sectional shape of the circumferential tab (28) leads axially to the circumferential groove (34). The at least one circumferential tab (28) and the at least one entry segment (36) are so oriented in their angular orientation in the respective linkage area (22) or as the case may be (24), that these come into registry with each other in the open or spread position of the pliers parts (10, 12), and the at least one circumferential tab (28) can be introduced into the circumferential groove (34) through the entry segment (36) or as the case may be removed therefrom, while in the other spread positions of the pliers parts (10, 12) the at least one circumferential tab (28) engages in the circumferential groove (34) and is held form-fittingly axially therein.
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Akerman & Senterfitt
Chiabotti Peter A.
Helmut Zepf Medizintechnik GmbH
Lewis Ralph A.
Pendorf Stephan A.
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