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Author

Stephen D. Hanks

Bio: Stephen D. Hanks is an academic researcher. The author has contributed to research in topics: Detent. The author has an hindex of 1, co-authored 1 publications receiving 15 citations.
Topics: Detent

Papers
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Patent
25 May 2006
TL;DR: An orthodontic force mechanism according to the invention includes an elongated jack screw having at a pair of end portions, at least one of which is threaded, and a central spindle section between the end portions as discussed by the authors.
Abstract: An orthodontic force mechanism according to the invention includes an elongated jack screw having at a pair of end portions, at least one of which is threaded, and a central spindle section between the end portions, which spindle section has at least two intersecting radial through-holes therein. A pair of nut housings are mounted on the end portions of the jack screw, at least one of which is threadedly coupled to a threaded end portion of the jack screw. A lock mechanism is mounted on the central spindle section, which lock mechanism includes a spring-loaded detent configured to engage an end opening of each of the through holes in the spindle section when such through hole is in alignment with the detent, such that the spindle cannot rotate relative to the lock mechanism when the detent is inserted into a through-hole, and is free to rotate relative to the lock mechanism when the detent is clear of a through hole. The detent can be moved out of engagement with a through hole using a tool inserted into that through hole from its opposite end, such that a distal end of the tool pushes the detent out of the through-hole, and the same tool can then be used to rotate the jack screw.

15 citations


Cited by
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Patent
02 Nov 2009
TL;DR: An expansion screw for regulating teeth has two expansion-screw bodies, the spacing between which can be changed by means of a spindle, and has at least one guide pin which is aligned parallel to the spindle and engages in guide openings of the two expansion screw bodies as discussed by the authors.
Abstract: An expansion screw for regulating teeth has two expansion-screw bodies, the spacing between which can be changed by means of a spindle, and has at least one guide pin which is aligned parallel to the spindle and engages in guide openings of the two expansion-screw bodies, the spindle having a first and a second threaded portion, each of which is connected to an expansion-screw body, and an actuating portion, with at least one point for application of a tool for rotating the spindle, and the expansion screw has a locking mechanism which interacts with the actuating portion in order to secure the spindle against unintended rotation. In order to develop the expansion screw such that it requires a smaller amount of installation space, it is proposed that the locking mechanism has at least one locking element with a locking member which is disposed laterally alongside the actuating portion and subjects the actuating portion to an axial spring force when the spindle is rotated.

11 citations

Patent
20 Dec 2007
TL;DR: An orthodontic expansion screw having two bodies whose distance from each other can be changed by means of a spindle that engages both bodies is described in this paper, where a friction brake is provided that presses onto the actuation part of the spindle and thus generates a frictional force that renders a rotation of the screw in both directions of rotation more difficult in order to prevent inadvertent readjustment.
Abstract: An orthodontic expansion screw having two bodies whose distance from each other can be changed by means of a spindle that engages both bodies. The spindle includes an actuation part for effecting a torque for readjusting the spindle, and a straight-line guide for engaging both bodies and guiding the bodies along two guide axes that are parallel to each other while preventing a relative rotation of the bodies when their distance from each other is being changed. A friction brake is provided that presses onto the actuation part of the spindle and thus generates a frictional force that renders a rotation of the spindle in both directions of rotation more difficult in order to prevent inadvertent readjustment of the spindle.

8 citations

Patent
05 Apr 2012
TL;DR: In this paper, a double-screw expander with a cylindrical head with two diametric holes that intersect at 90° for insertion of a starting key is described, and two screws threaded clockwise and anticlockwise extend from the two bases of the head, engaged with two respective nut screw blocks joined by palatal arms.
Abstract: A rapid palatal expander includes a double -screw jack having a cylindrical head with two diametric holes that intersect at 90° for insertion of a starting key. Two screws threaded clockwise and anticlockwise extend from the two bases of the head, engaged with two respective nut screw blocks joined, by palatal arms, to metal crowns cemented to the molars of the upper semi -arches. Two pins pass through the blocks from opposite sides in relation to the double screw and guide them in opposite directions during rotation of the screw jack. A circumferential tooth projects from the cylindrical surface of the head of the screw jack, exerting pressure against the pins to prevent any undesired rotation that might reduce the degree of expansion achieved.

7 citations

Patent
04 Mar 2021
TL;DR: A maxillary skeletal expander is composed of a pair of dental arch expansion bodies positioned to face each other in an oral cavity; an expanding screw provided between the pair of DAs to move the DAs without deviation; a DAs expansion body combining means having a fixing piece for penetrating a fixing hole at a selected part in the oral cavity as discussed by the authors.
Abstract: A maxillary skeletal expander is proposed. The maxillary skeletal expander is composed of a pair of dental arch expansion bodies positioned to face each other in an oral cavity; an expanding screw provided between the pair of dental arch expansion bodies to move the dental arch expansion bodies; a guide provided between the pair of dental arch expansion bodies to safely move the dental arch expansion bodies without deviation; a dental arch expansion body combining means having a fixing piece for penetrating a fixing hole at a selected part in the oral cavity, and configured to be combined to and separated from each of the dental arch expansion bodies.

5 citations

Patent
16 Jul 2014
TL;DR: In this article, the Rapid Palatal Expander (RPE) is described, which has an actuator element provided with a drive head and with two threaded stems, as well as a first and a second main bodies provided with aligned female threads, each engaged by a threaded stem of the actuator elements for guiding a simultaneous movement of the main bodies.
Abstract: Rapid palatal expander which has an actuator element provided with a drive head and with two threaded stems, as well as a first and a second main bodies provided with aligned female threads, each engaged by a threaded stem of the actuator element for guiding a simultaneous movement of the main bodies. A plurality of longitudinal seats are provided on a peripheral surface of the drive head. A plate is connected to one of the two main bodies and is provided with a flexible tab elastically in abutment against the peripheral surface of the drive head and able to be selectively engaged with its profile in the longitudinal seats of the head at angular adjustment positions assumed by the latter.

3 citations