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US 2014/0305968 A1Published application
Device for dispensing a dental material
Assignee3M Innovative Properties Company
InventorÖzcan Dönmez
Life of this patent
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Abstract
A device (100) for dispensing a dental material which comprises a spindle drive (10) for driving a piston (111) for extruding the dental material. The spindle drive (10) comprises a pair of threaded spindles and a clasp nut member (20) which is adapted for engaging with anyone of the spindles. The clasp nut member has first and second thread structures (11, 12) which are offset relative to each other by about ½ of the pitch of the thread of the spindle or the thread structures (11, 12) in a dimension of the pitch.
Claims15
A device for dispensing a dental material, comprising:
- a spindle drive for driving at least one piston for extruding the dental material from a container, the spindle drive comprising:
- a pair of threaded spindles extending generally parallel to a longitudinal axis, wherein the threads of the spindles base on the same pitch;
- and
- a clasp nut member having a first thread structure and a second thread structure, each of the first and second thread structures being adapted for engaging with the thread of anyone of the spindles to establish a screw connection between the clasp nut member and the spindles;
- wherein the first and second thread structures are offset relative to each other by about ½ of the pitch, or multiple pitches less about ½ of the pitch, in a direction oriented parallel to the longitudinal axis.
2 more elements
Dependencies are inferred from the claim text.