# US 2021/0274708 A1 · Height of cut and rake adjustment system

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- Number: US 2021/0274708 A1
- Document ID: US20210274708A1
- Status: Published application
- Kind: A1
- Application number: 16/808,826
- Filed: 2020-03-04
- Published: 2021-09-09
- Earliest claimed: 2020-03-04
- Assignees: Deere & Company
- Applicants: Deere & Company
- Inventors: CHAD C. STEEN
- Web page: https://patentgrep.com/patent/US20210274708A1

## CPC

- A01D 34/74: Cutting-height adjustment
- A01D 34/66: with two or more cutters
- A01D 75/306: {for lawn mowers positioned one behind the other or side by side}
- A01D 2101/00: Lawn-mowers
- A01D: HARVESTING; MOWING

## Abstract

A height of cut and rake adjustment system for a rough, trim and surround mower deck with a pair of front height of cut arms and a pair of rear height of cut arms. Each height of cut arm is pivotably mounted to the mower deck on a pivot axis below an upper end of each height of cut arm. An adjustable height of cut linkage extends between the upper end of each front height of cut arm and the upper end of each rear height of cut arm. An adjustable rake linkage extends between the upper end of each front height of cut arm and an intermediate portion of each rear height of cut arm below the pivot axis.

## Claims

### Claim 1

A height of cut and rake adjustment system, comprising:
a front height of cut arm and a rear height of cut arm, each height of cut arm pivotably mounted to a rotary cutting deck on a pivot axis below an upper end of each height of cut arm;
a height of cut linkage extending between the upper end of each front height of cut arm and the upper end of each rear height of cut arm; and
a rake linkage extending between the upper end of each front height of cut arm and an intermediate portion of each rear height of cut arm below the pivot axis.

### Claim 2 (depends on 1)

The height of cut and rake adjustment system of claim 1 wherein each of the height of cut and rake linkages is attached to the front and the rear height of cut arms with pins inserted through holes in each end of the linkages.

### Claim 3 (depends on 1)

The height of cut and rake adjustment system of claim 1 wherein the height of cut linkage is a straight bar.

### Claim 4 (depends on 1)

The height of cut and rake adjustment system of claim 1 wherein the rake linkage is a curved bar.

### Claim 5

A height of cut and rake adjustment system, comprising:
a pair of height of cut linkages extending fore and aft above a left side and a right side of a mower deck;
a pair of rake linkages extending fore and aft adjacent the left side and right side of the mower deck;
each of the pair of height of cut linkages and the pair of rake linkages having an effective length that is manually adjustable to change an angle of a pair of front height of cut arms and an angle of a pair of rear height of cut arms relative to the mower deck.

### Claim 6 (depends on 5)

The height of cut and rake adjustment system of claim 5 wherein each height of cut linkage and each rake linkage is connected to one of the pair of front height of cut arms and one of the pair of rear height of cut arms with a pin held in place with a clip.

### Claim 7 (depends on 5)

The height of cut and rake adjustment system of claim 5 wherein each rake linkage is connected to one of the pair of rear height of cut arms below a pivot point of the rear height of cut arm.

### Claim 8 (depends on 5)

The height of cut and rake adjustment system of claim 5 wherein each height of cut linkage is connected to one of the pair of front height of cut arms and one of the pair of rear height of cut arms above a pivot point of each of the arms.

### Claim 9 (depends on 5)

The height of cut and rake adjustment system of claim 5 wherein each height of cut linkage is a linear metal bar having at least one hole in each end.

### Claim 10 (depends on 5)

The height of cut and rake adjustment system of claim 5 wherein each rake linkage is a curved metal bar having at least one hole in each end.

### Claim 11

A height of cut and rake adjustment system, comprising:
a plurality of mower decks on a rough, trim or surround mower;
a pair of height of cut linkages extending above each of the mower decks;
a pair of rake linkages extending alongside each of the mower decks;
each pair of height of cut linkages and each pair of rake linkages having an effective length that is manually adjustable to change a height of cut and a rake of the mower deck.

### Claim 12 (depends on 11)

The height of cut and rake adjustment system of claim 11 wherein each pair of height of cut linkages and each pair of rake linkages are connected to a front height of cut arm and a rear height of cut arm with a pair of manually removable pins.