# US 2021/0274697 A1 · Ground engaging tiller with involute profile

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2021/0274697 A1
- Document ID: US20210274697A1
- Status: Published application
- Kind: A1
- Application number: 16/946,820
- Filed: 2020-07-08
- Published: 2021-09-09
- Earliest claimed: 2020-03-09
- Inventors: Joshua Zulu
- Web page: https://patentgrep.com/patent/US20210274697A1

## CPC

- A01B 33/103: {the rotating shaft being oriented horizontally}
- A01B 33/02: with tools on horizontal shaft transverse to direction of travel
- A01B 33/024: {with disk-like tools}
- A01B 33/028: {of the walk-behind type (walk-type tractors B62D51/04)}
- A01B: SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL (making or covering furrows or holes for sowing, planting or manuring A01C5/00; mowers convertible to soil working apparatus or capable of soil working A01D42/04; mowers combined with soil working implements A01D43/12; soil working for engineering purposes E01, E02, E21)

## Abstract

A tilling apparatus is disclosed. The tilling apparatus includes a central rotating assembly and multiple tiller blades. The tiller blades are attached to the circumference of the central rotating assembly. At least one surface of the tiller blades has an involute curve. A tilling apparatus is also disclosed including a central rotating assembly, multiple tiller blades in circumferential rows, a hitch assembly, and a frame. The central rotating assembly is mounted longitudinally on a horizontal shaft and has a fillable cavity. Each tiller blade has at least one surface with an involute curve. A ratio of the central rotating assembly's radius to a radial length of the tiller blades is at least about 1:1.

## Claims

### Claim 1

A ploughing apparatus, comprising a central rotating assembly and a plurality of tiller blades attached circumferentially thereto, wherein the tiller blades have at least one surface characterized by an involute curve with respect to the central rotating assembly and wherein the tiller blades curve in a clockwise direction when viewed along a longitudinal axis of the central rotating assembly with a forward direction to the right;
wherein the central rotating assembly, the plurality of tiller blades, or the central rotating assembly and the plurality of tiller blades are effective to intermittently direct additional penetrating force to a tip of at least one of the plurality of tiller blades.

### Claim 2 (depends on 1)

The ploughing apparatus of claim 1, wherein the plurality of tiller blades is characterized by a cross-section effective to displace most soil backwards during use.

### Claim 3 (depends on 1)

The ploughing apparatus of claim 1, wherein the plurality of tiller blades are ploughing blades with a “v” shaped cross-section.

### Claim 4 (depends on 1)

The ploughing apparatus of claim 1, wherein the plurality of tiller blades are track shoes with grousers characterized by an involute curve.

### Claim 5 (depends on 1)

The ploughing apparatus of claim 1, wherein a ratio of the central rotating assembly's radius to a radial length of the plurality of tiller blades is at least about 1:1.

### Claim 6

(canceled)

### Claim 7 (depends on 1)

The ploughing apparatus of claim 1, wherein the plurality of tiller blades are configured in a plurality of circumferential rows.

### Claim 8 (depends on 1)

The ploughing apparatus of claim 1, wherein the central rotating assembly is mounted longitudinally on a horizontal shaft.

### Claim 9 (depends on 1)

The ploughing apparatus of claim 1, wherein the central rotating assembly is attached to a hitch assembly by way of a frame.

### Claim 10 (depends on 1)

The ploughing apparatus of claim 1, wherein the central rotating assembly has an airtight fillable cavity.

### Claim 11 (depends on 1)

The ploughing apparatus of claim 1, wherein the central rotating assembly is effective to intermittently direct additional penetrating force to a tip of at least one of the plurality of tiller blades.

### Claim 12

(canceled)

### Claim 13 (depends on 3)

The ploughing apparatus of claim 3, wherein the plurality of tiller blades is characterized by a cross-section operative to displace most soil backwards and sideways during use.

### Claim 14 (depends on 11)

The ploughing apparatus of claim 11, wherein the central rotating assembly is effective to intermittently direct additional penetrating force twice within a rotation thereof.

### Claim 15 (depends on 14)

The ploughing apparatus of claim 14, wherein the additional penetrating force is directed to the tip of two of the plurality of tiller blades mounted 180° apart.