# John Gorrie's 1851 Patent for Artificial Ice Production

> An 1851 patent by John Gorrie describing a mechanical process to create ice by compressing air and using it to cool water.

- **Patent:** US 8080
- **Original title:** Improved process for the artificial production of ice
- **Owner:** John Gorrie
- **Granted:** 1851
- **Status:** Active
- **Times cited:** 3
- **Field:** mechanical, energy

## What it does

The patent outlines a method for refrigeration by compressing atmospheric air, cooling it through expansion, and circulating the resulting cold air around a container of water to freeze it. By using a pump to compress air and then allowing it to expand, the system absorbs heat from the surrounding environment. This process effectively creates a closed-loop cooling cycle that can be used to produce ice blocks in climates where natural ice is unavailable.

## What it does NOT cover

- Does not cover chemical-based refrigeration systems using ammonia or other refrigerants.
- Does not cover modern vapor-compression cycles that rely on phase-change refrigerants.
- Does not cover electrical cooling or solid-state thermoelectric cooling methods.

## The clever bit

Gorrie realized that the rapid expansion of compressed air absorbs heat from its surroundings, effectively turning a mechanical pump into a cooling engine.

## Real-world examples

1. Early mechanical ice-making machines
2. Experimental cooling systems in 19th-century hospitals

## Why it matters

This patent represents one of the earliest documented attempts to move away from harvesting natural ice toward mechanical refrigeration. It laid the conceptual groundwork for the modern HVAC and refrigeration industries, even though Gorrie struggled to commercialize the machine during his lifetime.

## Frequently asked questions

### What does John Gorrie's 1851 Patent for Artificial Ice Production cover?

An 1851 patent by John Gorrie describing a mechanical process to create ice by compressing air and using it to cool water.

### Who owns patent US 8080?

John Gorrie owns this patent, granted in 1851.

### 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 8080 cited by?

This patent has been cited by 3 later patents that build on its ideas.

### What problem does this patent solve?

This patent represents one of the earliest documented attempts to move away from harvesting natural ice toward mechanical refrigeration. It laid the conceptual groundwork for the modern HVAC and refrigeration industries, even though Gorrie struggled to commercialize the machine during his lifetime.

### What does this patent NOT cover?

Does not cover chemical-based refrigeration systems using ammonia or other refrigerants.

**Full plain-English explainer:** https://patentbrief.org/patent/us/8080/ice-machine-refrigeration-gorrie

**Original patent:** https://patents.google.com/patent/US8080

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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 Willis Carrier Invented the Modern Air Conditioner](https://patentbrief.org/patent/us/808897/air-conditioning-carrier) — Willis Carrier's 1906 patent for an apparatus to control humidity and temperature, forming the technical foundation for modern air conditioning systems.
- [How Albert Einstein and Leo Szilard Designed a Silent Refrigerator](https://patentbrief.org/patent/us/1781541/einstein-szilard-refrigerator) — A 1930 patent by Albert Einstein and Leo Szilard for a refrigerator that uses electromagnetic pumps instead of moving mechanical parts to circulate coolant.
- [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.
- [How Alfred Nobel Stabilized Nitroglycerin with Dynamite](https://patentbrief.org/patent/us/78317/dynamite-nobel) — Alfred Nobel's 1868 patent for dynamite, which made the volatile liquid explosive nitroglycerin safe to handle by mixing it with an absorbent material.
- [How the Iron Lung Artificial Respirator Works](https://patentbrief.org/patent/us/1906844/iron-lung-respirator-drinker) — A 1933 patent for a mechanical respirator that uses external air pressure changes to force a patient's lungs to expand and contract.