# How Early Industrial Food Mixers Used Planetary Gear Systems

> A 1918 patent for a heavy-duty industrial mixing machine that used a specific gear arrangement to rotate a beater while simultaneously moving it around the bowl.

- **Patent:** US 1264128
- **Original title:** Mixing-machine.
- **Owner:** Hobart Manfacturing Co
- **Granted:** 1918
- **Status:** Public domain (expired)
- **Times cited:** 19
- **Field:** mechanical, consumer_electronics

## What it does

The patent describes a mechanical mixing apparatus designed for commercial kitchens. It utilizes a planetary gear system where the mixing tool rotates on its own axis while also revolving around the center of the mixing bowl. This dual-motion design ensures that the beater reaches all areas of the bowl, providing a more thorough and consistent mix than a single-axis mixer. The mechanism relies on a specific arrangement of drive shafts and gears housed within the mixer head to translate motor power into this complex orbital movement.

## What it does NOT cover

- Does not cover hand-operated kitchen whisks or manual egg beaters.
- Does not cover mixers that use a single fixed-axis rotation without planetary motion.
- Does not cover electronic speed control or digital automation features.
- Does not cover mixing bowls that rotate independently of the planetary beater head.

## The clever bit

The innovation lies in the planetary gear configuration, which forces the beater to trace a complex path that covers the entire bowl volume, preventing dead zones where ingredients might remain unmixed.

## Real-world examples

1. Hobart commercial stand mixers
2. KitchenAid stand mixers
3. Professional bakery dough mixers

## Why it matters

This design became the blueprint for the modern stand mixer. By enabling consistent, high-volume mixing, it transformed commercial baking and food preparation in the early 20th century. Hobart Manufacturing, now part of ITW, established a dominant position in the professional kitchen equipment market based on these robust mechanical designs.

## Frequently asked questions

### What does How Early Industrial Food Mixers Used Planetary Gear Systems cover?

A 1918 patent for a heavy-duty industrial mixing machine that used a specific gear arrangement to rotate a beater while simultaneously moving it around the bowl.

### Who owns patent US 1264128?

Hobart Manfacturing Co owns this patent, granted in 1918.

### When does this patent expire?

This patent has expired and is now in the public domain — anyone can use the invention freely.

### What is patent US 1264128 cited by?

This patent has been cited by 19 later patents that build on its ideas.

### What problem does this patent solve?

This design became the blueprint for the modern stand mixer. By enabling consistent, high-volume mixing, it transformed commercial baking and food preparation in the early 20th century. Hobart Manufacturing, now part of ITW, established a dominant position in the professional kitchen equipment market based on these robust mechanical designs.

### What does this patent NOT cover?

Does not cover hand-operated kitchen whisks or manual egg beaters.

**Full plain-English explainer:** https://patentbrief.org/patent/us/1264128/stand-mixer-kitchenaid-johnston

**Original patent:** https://patents.google.com/patent/US1264128

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_Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._


## Related patents

Semantically similar inventions in the PatentBrief corpus:

- [How Early Washing Machines Moved Clothes](https://patentbrief.org/patent/us/966677/electric-washing-machine-fisher) — This 1910 patent describes a mechanical system designed to power the washing action within early washing machines, focusing on how the tub or agitator moved.
- [How the Modern Kitchen Blender Works](https://patentbrief.org/patent/us/1480914/blender-beverage-mixer-poplawski) — Stephen Poplawski's 1922 invention of the electric beverage mixer, which introduced the rotating blade at the base of a container to liquefy ingredients.
- [How the 1940 Nachumsohn Cooking Apparatus Works](https://patentbrief.org/patent/us/2187888/crock-pot-slow-cooker-naxon) — A 1940 patent for a cooking device designed to heat food efficiently using an enclosed chamber and specific heat distribution methods.
- [How Percy Spencer Invented the Microwave Oven](https://patentbrief.org/patent/us/2495429/microwave-oven-cooking) — This 1945 patent describes the process of using concentrated microwave energy to cook food, the fundamental technology behind the modern microwave oven.
- [How Clarence Birdseye Invented Modern Frozen Food](https://patentbrief.org/patent/us/1773079/frozen-food-birdseye) — This 1930 patent describes the process of rapidly freezing food in small packages to prevent the formation of large ice crystals that ruin texture and flavor.