Compulsory mixer used, in particular, as a cement mixer

• US 6,390,664 B1
• Filed: 06/20/2001
• Issued: 05/21/2002
• Est. Priority Date: 10/21/1999
• Status: Expired due to Fees

• Current Assignee: Alexander Kniele, Harald Kniele
• Original Assignee: Alexander Kniele, Harald Kniele
• Inventors: Kniele, Alexander, Kniele, Harald
• Primary Examiner(s): SOOHOO, TONY GLEN
• Application Number:
  US09/869,083
• Time in Patent Office: 335 Days
• Field of Search: 366/65, 366/66, 366/194, 366/195, 366/196, 366/343, 366/276, 366/279, 366/292, 366/293, 366/294, 366/296, 366/295, 366/309, 366/312, 366/601, 222/241, 222/240
• US Class Current: 366/293
• CPC Class Codes: B01F 27/091 with elements co-operating with receptacle wall or bottom, e.g. for scraping the receptacle wall
• CPC Class Codes: B01F 27/84 with two or more stirrers rotating at different speeds or in opposite directions about the same axis
• CPC Class Codes: B01F 27/9211 the helices being surrounded by a guiding tube
• CPC Class Codes: B28C 5/0818 Charging or discharging gates or chutes; Sealing means
• CPC Class Codes: B28C 5/166 Pan-type mixers
• CPC Class Codes: Y10S 366/601 Motor control

Abstract

There is provided a forced mixer for mixing components, comprising a funnel-shaped mixing space having along its center axis (3) a coaxially mounted inner and outer mixing tool, the inner mixing tool (2) consisting of a screw (5) extending toward the outlet slide (6). For the forced mixer to be usable with a high efficency in particular as a concrete mixer, the outer mixing tool (8) comprises mixing shares or scrapers (9) glidingly moving along the mixing container surfaces (1) contacted by the mixed material.

Claims

1. A forced mixer for mixing components of a mixed material, the mixer comprising:

a funnel-shaped mixing container having mixing surfaces, a center axis, an outlet slide, and along its center axis a coaxially arranged an inner mixing tool and an outer mixing tool, the inner mixing tool consisting of a screw extending towards the outlet slide, wherein the outer mixing tool comprises mixing shares or scrapers glidingly moving along the mixing surfaces contacted by the mixed material, and wherein the outer mixing tool is driven at intervals and alternately between a first rotational direction and an opposite rotational direction.

2. The forced mixer as claimed in claim 1, wherein the screw of the inner mixing tool has a cylindrical shape.

3. The forced mixer as claimed in claim 1, wherein the screw of the inner mixing tool is conically shaped having a diameter increasing in an upward direction.

4. The forced mixer as claimed in any one of claims 1 through 3, characterized in that the inner mixing tool is formed by a shaft having wings arranged in a screw-type fashion.

5. The forced mixer as claimed in claim 4, further comprising cutting elements arranged at the screw or at the wings arranged on top of each other.

6. The forced mixer as claimed in claim 5, wherein both mixing tools have drives that operate at fixed RPMs.

7. The forced mixer as claimed in claim 5, wherein both mixing tools have drives that provide continuously adjustable speed.

8. The forced mixer as claimed in claim 1, wherein the mixing tools each have a drive mounted with an elastic rubber-type support and the forced mixer further comprises a vibrator attached to the mixing container.