Dentistry – Apparatus – Having intra-oral dispensing means
Patent
1997-05-05
1999-02-16
Wilson, John J.
Dentistry
Apparatus
Having intra-oral dispensing means
433 90, A61C 504
Patent
active
058713549
ABSTRACT:
An applicator for highly viscous materials such as dental filling materials has a housing and a first and second jamming element positioned spaced from one another in a longitudinal direction in the housing. A coupling rod is connected to the second jamming element. A piston rod is supported in the housing. An actuating element is positioned at the housing and connected to the piston rod for moving the piston rod in a forward direction from an inactive position into a working position, and in a rearward direction from the working position into the inactive position. The first jamming element is jammed, when the actuating element actuates the piston rod in the forward direction, and is moved with the piston rod in the forward direction. The second jamming element is jammed by a spring force in the rearward direction so as to rest at the housing, when the actuating element actuates the piston rod in the forward direction. The actuating element, when moving the piston rod in the rearward direction, acts on the coupling rod for releasing the second jamming element.
REFERENCES:
patent: 4090639 (1978-05-01), Campbell et al.
patent: 4330070 (1982-05-01), Doubleday
patent: 4382789 (1983-05-01), COlombo et al.
patent: 4681524 (1987-07-01), Ikeda et al.
patent: 4840294 (1989-06-01), Ernst
patent: 5192008 (1993-03-01), Hwan
Kunkel Peter
Mertins Jurgen
Ivoclar AG
Korman Alan S.
Thompson John C.
Wilson John J.
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