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.
Original patent title: “Improved process for the artificial production of ice”
An 1851 patent by John Gorrie describing a mechanical process to create ice by compressing air and using it to cool water. Granted to John Gorrie in 1851 with 3 forward citations.
Key facts
Coverage
What does this patent actually cover?
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.
The gap
What does this patent 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.
These exclusions are unique to PatentBrief — derived from the actual claim language, not patent-office boilerplate.
What made this novel
Gorrie realized that the rapid expansion of compressed air absorbs heat from its surroundings, effectively turning a mechanical pump into a cooling engine.
The Patent Drawing
Schematic visualization of the patent's claim structure. Hand-drawn diagrams in progress for each landmark patent.
Where you've seen this
Real-world examples
Early mechanical ice-making machines
Experimental cooling systems in 19th-century hospitals
Why it matters
The bigger picture
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.
Granted
May 6, 1851
Market context
Who's building on this
Companies in this space
Modern refrigeration companies like Carrier and Trane trace their technical lineage back to the principles of thermodynamics established by early pioneers like Gorrie. While his specific air-cycle design is largely obsolete for home use, the fundamental physics remain a subject of study in thermodynamic engineering.
Market impact
This patent helped shift public perception toward the possibility of artificial cooling. It triggered early interest in mechanical climate control, eventually leading to the massive global industry that now provides food preservation and air conditioning to billions.
Claim 1 — Plain English
What this patent covers
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.
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.
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.
PatentBrief Score
Impact Score
Limited data
Citation count
12/40
Early citations
Claim breadth
0/20
Narrow claimsclaimsThe numbered statements at the end of a patent that legally define what the inventor owns.Read more →
Recency
0/20
Older than 20 years
Assignee scale
0/20
Independent or smaller assigneeassigneeThe entity that owns the patent — usually the inventor's employer or a company.Read more →
PatentBrief Impact Score — based on citation count, claim breadth, recency, and assignee scale. Not a legal assessment.
Heuristic Value Estimate
What this patent might be worth
$7K – $21K
Midpoint $13K · expired or expiring · industry ×2.2
Heuristic only — blends forward/backward citation counts, claim scope, time remaining, litigation history, and CPC-derived industry baseline. Real valuations need a professional appraisal.
Concepts involved
Citations
Patent lineage
Cite this patent
(1851). John Gorrie's 1851 Patent for Artificial Ice Production (U.S. Patent No. 8,080). U.S. Patent and Trademark Office. https://patentbrief.org/patent/us/8080/ice-machine-refrigeration-gorrie
Auto-generated from the patent record. Double-check author order and the issue date against the official USPTO document before submitting.
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Common Questions
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.
Patent monitoring