US 4,889,432 AGranted

Dental mixer apparatus

OwnerRoosevelt Pattersoninventor

Life of this patent

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Abstract

A dental mixer apparatus including an upright mixing chamber having an upper open end for receiving dental impression materials and a plunger member suspended coaxially upon an elongated rotary driven mixer shaft for vertical reciprocable movement between a lower operative position in which the plunger is received within the mixing chamber and an upper inoperative position above the mixing chamber. A rotary mixer head is driven by the mixer shaft below the mixing chamber for mixing the materials within the mixing chamber. A suction conduit is provided to suck air from the mixing chamber in order to minimize voids and bubbles within the mixed ingredients. The mixer shaft is supported by a support bracket which is pivotally mounted to permit the mixer shaft and plunger to swing away from their normal vertical position above the mixing chamber to provide more working space above the mixing chamber. Optionally, the mixing chamber may be supported in a receptacle hinged to a base member to permit swinging movement of the mixing chamber away from its position beneath the mixer head. The plunger may also be depressed to discharge the mixed ingredients from an opening in the bottom of the mixing chamber.

Claims13

Dependent claims

An apparatus for mixing dental impression materials, comprising:

(a) a base,
(b) a mixing chamber having an upright longitudinal axis, an upper open end, a bottom end portion, and a substantially uniform cross-section, adapted to receive dental impression materials,
(c) means holding said mixing chamber on said base in a substantially upright position,
(d) an elongated plunger member having a longitudinal axis and a substantially uniform cross-section less than the cross-section of said mixing chamber,
(e) an elongated mixer shaft longer than said plunger member and extending coaxially through said plunger member and having upper and lower end portions,
(f) a mixer head on said lower end portion below said plunger member,
(g) support means on said base supporting said mixer shaft and said plunger member for vertical reciprocal movement coaxially of said mixing chamber between a lower operative position in which said plunger member is telescopingly received in said mixing chamber, and an elevated inoperative position in which said mixer shaft and plunger member are above said mixing chamber,
(h) bearing means supporting said mixer shaft in said plunger member for relative coaxial movement to permit said mixer head to descend from said operative position to a mixing position within said mixing chamber,
(i) a suction conduit for removing air from said mixing chamber while said plunger member is in said operative position, and
(j) drive means for driving said mixer shaft to rotate said mixer head.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/307,308Filed 7 Feb 1989
Granted: 26 Dec 1989
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

B01F 35/511
Mixing receptacles: provided with liners, e.g. wear resistant or flexible liners
A61C 5/64
Applicators, e.g. syringes or guns: for multi-component compositions
A61C 9/0026
Impression cups, i.e. impression trays; Impression methods: syringes or guns for injecting impression material; Mixing impression material for…
B01F 27/806
Wherein the stirrers or the receptacles are moved in order to bring them into operative position; Means for fixing the receptacle: with vertical…