You can freely build on Early Car Wheel Traction Device
This patent expired in 1934. Every claim — 0 independent, 0 dependent — is now unenforceable. Anyone can use, reproduce, manufacture, sell, or offer for sale this technology without a license.
Original assignee
Individual
Patent granted
1915
Expired
1934
Forward citations
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What this patent covers
This patent describes a device designed to wrap around a vehicle's wheel, specifically to provide better grip on roads covered in snow, ice, or mud. It consists of a flexible metal band that encircles the tire. Attached to this band are cross-members, essentially metal bars or plates, that extend outward from the wheel's circumference. When the wheel rotates, these cross-members dig into the slippery surface, preventing the tire from spinning freely and helping the vehicle move forward. The patent claims a 'vehicle-scotch' comprising a flexible band and 'cleats' or cross-members for traction.
What is now free to use
All 0 claims of US 1141798 are in the public domain. Specifically:
The 0 dependent claims add narrowing limitations and are also free.
What is NOT covered
Patent expiry frees this specific invention. Separately-patented improvements made after expiry may still be protected.
Does not cover tire chains that are a continuous loop around the tire.
Does not cover devices that attach to the vehicle's chassis instead of the wheel.
Does not cover pneumatic tires with specialized tread patterns.
Does not cover the use of sand or other loose materials for traction.
Does not cover devices that are permanently affixed to the wheel rim.
Who is building on this today
Given the patent's age and the significant advancements in tire technology since 1915, it is unlikely that current companies are directly building on this specific design. However, the fundamental problem it addresses—vehicle traction—remains a core focus for tire manufacturers and automotive engineers.
Products built on expired version of this technology
Early 20th-century automobiles
Traction devices for horse-drawn carriages (conceptually similar)
How to cite this patent in your documentation
Individual. US Patent 1141798. Vehicle-scotch.. Granted 1915, expired 1934. Now in the public domain.
Note: This is a convenience citation. Consult a patent attorney for formal freedom-to-operate analysis.
PatentBrief is an educational resource and does not provide legal advice. Patent expiration information is derived from USPTO records and may not reflect continuation patents, divisional filings, or separately-patented improvements. For commercial use or production decisions, obtain a formal freedom-to-operate (FTO) opinion from a registered patent attorney.