Portable mixing/delivery apparatus for pre-blended granular mixtures

• US 6,666,573 B2
• Filed: 10/18/2001
• Issued: 12/23/2003
• Est. Priority Date: 10/18/2001
• Status: Expired due to Fees

• Current Assignee: Frank Grassi, Theresa Grassi
• Original Assignee: Frank Grassi
• Inventors: Grassi, Frank
• Primary Examiner(s): SOOHOO, TONY GLEN
• Application Number:
  US09/982,611
• Publication Number:
  US 20030076737A1
• Time in Patent Office: 796 Days
• Field of Search: 366/26, 366/38, 366/42, 366/41, 366/45, 366/46, 366/47, 366/48, 366/50, 366/183.1, 366/150.1, 366/318, 141/314, 222/413
• US Class Current: 366/26
• CPC Class Codes: B01F 25/3141 with additional mixing means other than injector mixers
• CPC Class Codes: B01F 27/2123 Shafts with both stirring means and feeding or discharging means
• CPC Class Codes: B01F 27/724 with a single helix closely surrounded by a casing
• CPC Class Codes: B01F 33/5011 portable during use, e.g. hand-held
• CPC Class Codes: B01F 33/5012 adapted to be mounted during use on a standard, base or support
• CPC Class Codes: B01F 35/7173 using gravity, e.g. from a hopper
• CPC Class Codes: B01F 35/71775 using helical screws
• CPC Class Codes: B28C 5/0856 Supporting frames or structures, e.g. supporting wheels
• CPC Class Codes: B28C 5/0893 Mobile mixing devices, e.g. hanging
• CPC Class Codes: B28C 5/1292 with rotating stirring and feeding or discharging means fixed on the same axis, e.g. in an inclined container fed at its lower part
• CPC Class Codes: B28C 7/064 Supply from sacks; Sack openers
• CPC Class Codes: B28C 7/12 Supplying or proportioning liquid ingredients
• CPC Class Codes: B28C 9/0463 with a mixing discharge trough with a free end, e.g. provided with a mixing screw or pivotable about a vertical or horizontal axis

Abstract

A portable mixing/delivery apparatus mixes dry pre-blended materials, such as homogeneous cementitious combinations of dry sand, cement, Lime, color pigments, etc., packaged in large bulk bags for use at a remote construction site. The bulk bag is lifted by a removable rack having plural lift eyes and the combination is positioned over a height adjustable frame. The granular material is then discharged into a continuous mixer having a dynamic input mixing stage, an output dry-to-wet mixing stage, and a transition stage therebetween. The entire assembly (bulk bag, frame and continuous mixer) is portable and can be lifted such as by a forklift to the height of a masonry scaffold for dispensing the mixed, wet granular material directly to the point of use. The apparatus allows the continuous mixer and its discharge tube to rotate to facilitate dispensing of the material directly to the point of use.

Claims

1. A portable mixing/delivery apparatus for dispensing mixed, wet granular material directly to a point of use for said material at a job site, said apparatus comprising:

a support frame;

a container holding dry pre-blended granular material attached to said support frame;

a source of liquid;

a continuous mixer coupled to said source of liquid and attached to said support frame for receiving said dry pre-blended granular material from said container and converting said dry pre-blended granular material to a mixed, wet granular material for continuous discharge directly at the point of use; and

lift means attached to said support frame for receiving a lift mechanism for transporting the apparatus to the point of use.

2. The apparatus of claim 1 wherein said lift means includes plural receptacles for receiving and engaging the lift mechanism.

3. The apparatus of claim 2 wherein said lift mechanism is a forklift having a pair of forks, and wherein said lift means includes first and second tubular structural members each adapted to receive and engage a respective fork.

4. The apparatus of claim 3 wherein each of said tubular structural members is generally linear, elongated and hollow in shape.

5. The apparatus of claim 1 wherein said container is a bulk bag or a hopper.

6. The apparatus of claim of 5 wherein said hopper is comprised of a high strength, lightweight plastic.

7. The apparatus of claim 6 wherein said high strength, lightweight plastic is polyethylene.

8. The apparatus of claim 1 wherein said container is a bulk bag or a bulk hopper and said continuous mixer includes a mixer hopper and an intake tube attached to said mixer hopper and wherein a lower portion of said bulk bag or bulk hopper is attached to said intake tube for delivering dry pre-blended granular material to said mixer hopper.

9. The apparatus of claim 1 wherein said continuous mixer includes a hopper for receiving dry pre-blended granular material, a mixing tube connected to said hopper, and mixing/displacement means for mixing the dry pre-blended granular material in said hopper and displacing the material into and through said mixing tube.

10. The apparatus of claim 9 wherein said source of liquid is connected to said mixing tube for wetting the dry pre-blended granular material.

11. The apparatus of claim 10 further comprising a flexible discharge tube connected to said mixing tube for dispensing the mixed, wet granular material to the point of use.

12. The apparatus of claim 1 wherein said container is a bulk bag, and wherein said support frame is adjustable in height to accommodate a range of bulk bag sizes.

13. The apparatus of claim 1 wherein said support frame includes a removable top frame connected to and supporting a bulk bag containing dry pre-blended granular material for deposit in said continuous mixer.

14. The apparatus of claim 13 wherein said bulk bag includes plural loops and said removable top frame includes plural hooks each adapted to engage a respective loop for supporting said bulk bag in a suspended position.

15. The apparatus of claim 14 wherein said removable top frame includes plural connections for receiving and engaging a lift mechanism for placing said top frame on or removing said top frame from said support frame.

16. The apparatus of claim 15 wherein said lift mechanism is a forklift having a pair of forks and said connections include first and second tubular structural members each adapted to receive and engage a respective fork.

17. The apparatus of claim 16 wherein each of said tubular structural members is generally linear, elongated and hollow in shape.

18. A portable mixing/delivery apparatus for dispensing mixed, wet granular material directly to a point of use for said material at a job site, said apparatus comprising:

a support frame;

a container holding dry pre-blended granular material attached to said support frame;

a source of liquid;

a continuous mixer coupled to said source of liquid and attached to said support frame for receiving said dry pre-blended granular material from said container and converting said dry pre-blended granular material to a mixed, wet granular material for discharge directly at the point of use;

lift means attached to said support frame for receiving a lift mechanism for transporting the apparatus to the point of use; and

a movable mounting arrangement attaching said continuous mixer to said support frame to facilitate discharge of the mixed, wet granular material directly to the point of use.

19. The apparatus of claim 18 wherein said movable mounting arrangement includes a rotation ring for allowing pivoting displacement of said continuous mixer in said support frame.

20. The apparatus of claim 19 wherein said continuous mixer is pivotally displaceable over at least 180°

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