Dentistry – Apparatus – Work support
Patent
1983-09-22
1984-11-06
Wilson, John J.
Dentistry
Apparatus
Work support
433 65, A61C 1100
Patent
active
044809956
ABSTRACT:
The present invention relates to an improved apparatus for use in fabricating orthodontic appliances. The apparatus includes a pair of spaced apart lower and upper horizontally extending arms. The lower arm is adapted to carry a lower dental casting and the upper arm is adapted to carry an upper dental casting in facing relationship with the lower dental casting. A pair of spaced apart parallel cylindrical guide shafts extend upwardly in a generally vertical direction from the lower arm. The upper arm is attached to a mounting device utilized to support the upper arm for vertical movement toward and away from the lower arm. The mounting device includes a pair of spaced apart cooperating guide apertures for slidably receiving the guide shafts. A locking screw is provided in the mounting device for frictionally engaging one of the guide shafts for releasably securing the upper arm in a selected vertical position relative to the lower arm. A reference stop member having a pair of apertures formed therein for slidably receiving the guide shafts is positioned on the guide shafts between the lower arm and the upper arm. The stop means includes a locking screw for releasably securing the stop means on the guide shafts in a selected vertical position relative to the lower arm. The stop member is engageable with the mounting device of the upper arm for limiting the spacing between the upper arm and the lower arm.
REFERENCES:
patent: 1102741 (1914-07-01), Hardie
patent: 2138254 (1938-11-01), Mink
patent: 2930127 (1960-03-01), Mann et al.
patent: 3059336 (1962-10-01), Windish
patent: 3758096 (1973-09-01), Tregillis et al.
patent: 4155163 (1979-05-01), Schwartz
patent: 4412822 (1983-11-01), Blechner
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