The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 1984
Filed:
Mar. 14, 1983
Rolf Forster, Pforzheim, DE;
Bernhard Forster GmbH, Pforzheim, DE;
Abstract
This invention relates to an orthodontic spreader, particularly for correcting the positions of molars in the upper jaw, and comprises pressure-transmitting nuts for applying force at points which are as close as possible to the center of resistance. The spreader is capable of applying a high pressure and has a large spreading capacity and is as convenient as possible for the patient. The actuating screw for moving the pressure-transmitting nuts in opposite directions comprises an actuating portion, which is disposed between said pressure-transmitting nuts. Guide rods are slidably mounted in both pressure-transmitting nuts and carry stops which axially restrain said guide rods.