Device for mixing two pasty substances, particularly for mixing a dental impression substance with catalyst substance

• US 6,523,992 B1
• Filed: 11/13/2000
• Issued: 02/25/2003
• Est. Priority Date: 11/12/1999
• Status: Expired due to Term

• Current Assignee: Kettenbach GmbH & Co. KG
• Original Assignee: Kettenbach GmbH & Co. KG
• Inventors: Bublewitz, Alexander, Suchan, Matthias
• Primary Examiner(s): Cooley, Charles E.
• Application Number:
  US09/709,499
• Time in Patent Office: 834 Days
• Field of Search: 366/172.1, 366/172.2, 366/176.1, 366/181.5, 366/312, 366/325.1, 366/325.2, 366/329.1, 366/329.2, 366/326.1, 222/145.5, 222/145.6
• US Class Current: 366/172.1
• CPC Class Codes: A61C 5/64 for multi-component compositions
• CPC Class Codes: A61C 9/0026 Syringes or guns for injecting impression material; Mixing impression material for immediate use
• CPC Class Codes: B01F 2101/19 Mixing dentistry compositions
• CPC Class Codes: B01F 2101/2305 Mixers of the two-component package type, i.e. where at least two components are separately stored, and are mixed in the moment of application
• CPC Class Codes: B01F 23/47 involving high-viscosity liquids, e.g. asphalt
• CPC Class Codes: B01F 27/191 with similar elements
• CPC Class Codes: B01F 33/5011 portable during use, e.g. hand-held
• CPC Class Codes: B01F 33/8362 with chemical reactions
• CPC Class Codes: B01F 35/71 Feed mechanisms with proportioning B01F35/80
• CPC Class Codes: B01F 35/71805 using valves, gates, orifices or openings
• CPC Class Codes: B05C 17/00516 Shape or geometry of the outlet orifice or the outlet element

Abstract

The device for mixing two pasty substances, particularly for mixing a dental impression substance with a catalyst substance, comprises a housing with a substantially tubular portion. At least two inlet openings (68) for the two pasty substances are arranged at the rear end of said housing, and an outlet opening for the mixed pasty substances is arranged at the front end of said housing. The housing comprises a coupling portion joining the tubular portion and having two coupling openings for connecting the housing with two outlet openings of a device for dispensing the two pasty substances. The coupling openings are connected to the inlet openings (68) via first and second channels (64,66) extending through the coupling portion. At least one mixer element is arranged within the tubular portion of the housing for mixing the two pasty substances when the substances are passing through the tubular portion of the housing. The first channel (64) or the second channel (66) or both channels (64,66) extend to at least two inlet openings (68). All inlet openings (68) are spatially separated from each other. The first channel(s) (64) is (are) separated from the second channel(s) (66).

Claims

1. A device for mixing two pasty substances comprising a housing (42) including a substantially tubular portion (44) and at least two inlet openings (68, 70) for two pasty substances at a rear end of said housing (42), an outlet opening (52) for the mixed pasty substances at a front end of said housing (42), said housing (42) being provided with a coupling portion (46) having two coupling openings (55, 57) formed therein for connecting the housing (42) with two outlet openings (28, 30) of a device (12) for dispensing the two pasty substances, said coupling openings (55, 57) being connected to said at least two inlet openings (68, 70) through a respective first channel (64) and a second channel (66) each extending through said coupling portion (46), at least one mixer element (74, 75) arranged within said tubular portion (44) of said housing (12) for mixing the two pasty substances when the substances are passing through the tubular portion (44) of the housing (42), one of said first channel (64) and said second channel (66) extending through at least one of said at least two inlet openings (68, 70), said at least two inlet openings (68, 70) being spatially separated from each other, said first channel (64) being separated from said second channel (66), baffle elements (80) being arranged between said at least two inlet openings (68, 70) within the housing (42) for interrupting direct connection between said at least two inlet openings (68, 70), and the number and the relative arrangement of said baffle elements (80) being equal to the number and the relative arrangement of said at least two inlet openings (68, 70).

2. A device for mixing two pasty substances comprising a housing (42) including a substantially tubular portion (44) and at least two inlet openings (68, 70) for two pasty substances at a rear end of said housing (42), an outlet opening (52) for the mixed pasty substances at a front end of said housing (42), said housing (42) being provided with a coupling portion (46) having two coupling openings (55, 57) formed therein for connecting the housing (42) with two outlet openings (28, 30) of a device (12) for dispensing the two pasty substances, said coupling openings (55, 57) being connected to said at least two inlet openings (68, 70) through a respective first channel (64) and a second channel (66) each extending through said coupling portion (46), at least one mixer element (74, 75) arranged within said tubular portion (44) of said housing (12) for mixing the two pasty substances when the substances are passing through the tubular portion (44) of the housing (42), one of said first channel (64) and said second channel (66) extending through at least one of said at least two inlet openings (68, 70), said at least two inlet openings (68, 70) being spatially separated from each other, said first channel (64) being separated from said second channel (66), baffle elements (80) being arranged between said at least two inlet openings (68, 70) within the housing (42) for interrupting direct connection between said at least two inlet openings (68, 70), said at least one mixer element (74, 75) projecting radially from a mixer shaft (38) extending through said tubular portion (44) of the housing (42) and being supported for rotation therein, and said baffle elements (80) at said at least two inlet openings (68, 70) extending radially from said mixer shaft (38) and being arranged to sweep at least partially across said at least two inlet openings (68, 70) upon rotation of the mixer shaft (38).

3. The device as defined in claim 2 wherein each baffle element (80) includes a deflection face (82) extending around said mixer shaft (38) and being oriented obliquely relative to a radial plane of the mixer shaft (38) thereby to deflect the pasty substances radially entering said tubular portion (44) in an axial direction toward the outlet opening (52) of the housing (42).

4. The device as defined in claim 3 wherein each baffle element (80) is wedge-shaped.

5. The device as defined in claim 2 wherein the circumferential extension of the baffle elements (80) is equal to the circumferential distance between the at least two inlet openings (68, 70).

6. A device for mixing two pasty substances comprising a housing (42) including a substantially tubular portion (44) and at least two inlet openings (68, 70) for two pasty substances at a rear end of said housing (42), an outlet opening (52) for the mixed pasty substances at a front end of said housing (42), said housing (42) being provided with a coupling portion (46) having two coupling openings (55, 57) formed therein for connecting the housing (42) with two outlet openings (28, 30) of a device (12) for dispensing the two pasty substances, said coupling openings (55, 57) being connected to said at least two inlet openings (68, 70) through a respective first channel (64) and a second channel (66) each extending through said coupling portion (46), mixer elements (74, 75) arranged within said tubular portion (44) of said housing (12) for mixing the two pasty substances when the substances are passing through the tubular portion (44) of the housing (42), one of said first channel (64) and said second channel (66) extending through at least one of said at least two inlet openings (68, 70), said at least two inlet openings (68, 70) being spatially separated from each other, said first channel (64) being separated from said second channel (66), at least one of said mixer elements (74, 75) projects radially from an axis (72) of a mixer shaft (38) of said mixer elements (74, 75) toward an interface (76) of said tubular portion (44) of said housing (42), mixer elements (74) of first radial planes adjacent to each other in the radial direction to the at least two inlet openings (68, 70) are shorter than mixer elements (75) in other radial planes, and scraper elements (77) extend tangentially from the axis (72) of the mixer shaft (38) in association with at least one of said mixer elements (74, 75).