# US 2014/0190792 A1 · Screw conveyor

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- Number: US 2014/0190792 A1
- Document ID: US20140190792A1
- Status: Published application
- Kind: A1
- Application number: 14/100,310
- Filed: 2013-12-09
- Published: 2014-07-10
- Earliest claimed: 2013-01-08
- Assignees: Kenki Co., Ltd.
- Applicants: Kenki Co., Ltd.
- Inventors: Hideyuki MORIYAMA
- Web page: https://patentgrep.com/patent/US20140190792A1

## CPC

- B65G 33/18: with multiple screws in parallel arrangements {, e.g. concentric}
- B65G 33/26: Screws
- B65G 33/30: with a discontinuous helical surface
- B65G: TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS (packaging B65B; handling thin or filamentary materials, e.g. paper sheets or thread, B65H; cranes B66C; portable mobile or lifting or hauling appliances, e.g. hoists, B66D; devices for lifting or lowering goods for loading or unloading purposes, e.g. fork-lift trucks, B66F9/00; emptying bottles, jars, casks, barrels or similar containers, not otherwise provided for, B67C9/00; delivering or transferring liquids B67D; filling or discharging vessels for liquefied, solidified or compressed gases F17C; pipe-line systems for fluids F17D)

## Abstract

A screw conveyor includes a plurality of shafts rotatable in a common imaginary plane, and a plurality of blades arranged on each of the shafts in an axial direction of the shafts such that the blades define a part of an imaginary spiral around the shafts, each of the blades being semicircular in shape when viewed in an axial direction of the shafts, a distance S being longer than a length D, but shorter than 2D, wherein “S” indicates a distance between outer surfaces of two shafts located adjacent to each other, and “D” indicates a length by which the blades extend from outer surfaces of the shafts.

## Claims

### Claim 1

A screw conveyor including:
a plurality of shafts rotatable in a common imaginary plane; and
a plurality of blades arranged on each of said shafts in an axial direction of said shafts such that said blades define a part of an imaginary spiral around said shafts,
each of said blades being semicircular in shape when viewed in an axial direction of said shafts,
a distance S being longer than a length D, but shorter than 2D,
wherein “S” indicates a distance between outer surfaces of two shafts located adjacent to each other, and “D” indicates a length by which said blades extend from outer surfaces of said shafts.

### Claim 2 (depends on 1)

The screw conveyor as set forth in claim 1, wherein said shafts are in parallel with one another.

### Claim 3 (depends on 1)

The screw conveyor as set forth in claim 1, wherein said blades are situated in a line in an axial direction of said shafts.

### Claim 4 (depends on 1)

The screw conveyor as set forth in claim 1, wherein said shafts rotate in a common direction.

### Claim 5 (depends on 1)

The screw conveyor as set forth in claim 1, wherein said shafts rotate at different speed from one another.

### Claim 6 (depends on 1)

The screw conveyor as set forth in claim 1, further comprising a controller for controlling a rotation speed of each of said shafts in dependence on physical properties of an object to be fed by means of said screw conveyor.

### Claim 7

A screw conveyor including:
a plurality of shafts rotatable in a common imaginary plane; and
a plurality of blades arranged on each of said shafts in an axial direction of said shafts such that said blades define a part of an imaginary spiral around said shafts,
each of said blades including at least one fan-shaped blade when viewed in an axial direction of said shafts,
a distance S being longer than a length D, but shorter than 2D,
wherein “S” indicates a distance between outer surfaces of two shafts located adjacent to each other, and “D” indicates a length by which said blades extend from outer surfaces of said shafts.

### Claim 8 (depends on 7)

The screw conveyor as set forth in claim 7, wherein each of blades has a shape comprised of a plurality of fans when viewed in an axial direction of said shafts, said fans being located within a semicircular area about each of said shafts.

### Claim 9 (depends on 8)

The screw conveyor as set forth in claim 8, wherein said fans are identical in shape with one another.

### Claim 10 (depends on 9)

The screw conveyor as set forth in claim 9, wherein said fans are equally spaced away from one another around each of said shafts.

### Claim 11 (depends on 7)

The screw conveyor as set forth in claim 7, wherein said shafts are in parallel with one another.

### Claim 12 (depends on 7)

The screw conveyor as set forth in claim 7, wherein said blades are situated in a line in an axial direction of said shafts.

### Claim 13 (depends on 7)

The screw conveyor as set forth in claim 7, wherein said shafts rotate in a common direction.

### Claim 14 (depends on 7)

The screw conveyor as set forth in claim 7, wherein said shafts rotate at different speed from one another.

### Claim 15 (depends on 7)

The screw conveyor as set forth in claim 7, further comprising a controller for controlling a rotation speed of each of said shafts in dependence on physical properties of an object to be fed by means of said screw conveyor.