Patent FR883347A successfully refreshed from Google Patents.
US3602885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer flat tire warning device
Assignee: Individual
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Filing: 1969-08-27
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Granted: 1971-08-31
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Expires: 1989-08-27
Abstract
Abstract A deflated tire warning device which is adaptable particularly for trailers being towed behind a vehicle, the device comprising a unit mounted on the fender rearward of the trailer rear wheels, each unit including a downwardly extending steel rod the lower end of which normally clears a road surface but which engages the same when the tire becomes deflated partly, thus causing the rod to pivot and move an arm within the unit into position to close an electrical circuit to a lamp upon the automobile dashboard where it may be observed by a driver thus warning him that a tire is becoming flat.
Inventors
- 👤 Ruben Grajeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:50
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/06; B60C23/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
273 words
In a trailer flat tire warning device, the combination of a pair of units, each one of said units being mounted to a fender of a trailer being towed by a towing vehicle, each of said units being positioned at the rear of the rear wheels of said trailer, and each of said units having self-contained means for warning a driver in the towing vehicle in case the trailer tires start to become flat; each of the aforesaid units comprising a plastic case, said plastic case being of semicylindrical configuration and including a semicylindrical sidewall bounded at its opposite ends by parallel end walls, mounting lugs integral with said case for securement of said case to said fender, said case having a pair of parallel copper strips secured to the inner concave side of said semicylindrical sidewall, each of said copper strips being connected by a wire conductor extending outwardly of said case, one of said conductors being connected to an ignition switch of said towing vehicle, the other of said conductors being connected to a lamp on the dashboard of said towing vehicle, a transverse extending shaft extending through said case and being journaled within bearings in said end walls, a plastic arm secured to a central portion of said shaft, the terminal end of said plastic arm carrying a copper contact for bridging across said copper strips when said shaft is pivoted, said copper strips not extending to a lower portion of said case sidewall whereby said copper contact does not bridge the same, and said plastic arm being normally urged by a tension spring downward to prevent said contact engagement.
Claim 2
Dependent Claim
273 words
In a trailer flat tire warning device, the combination of a pair of units, each one of said units being mounted to a fender of a trailer being towed by a towing vehicle, each of said units being positioned at the rear of the rear wheels of said trailer, and each of said units having self-contained means for warning a driver in the towing vehicle in case the trailer tires start to become flat; each of the aforesaid units comprising a plastic case, said plastic case being of semicylindrical configuration and including a semicylindrical sidewall bounded at its opposite ends by parallel end walls, mounting lugs integral with said case for securement of said case to said fender, said case having a pair of parallel copper strips secured to the inner concave side of said semicylindrical sidewall, each of said copper strips being connected by a wire conductor extending outwardly of said case, one of said conductors being connected to an ignition switch of said towing vehicle, the other of said conductors being connected to a lamp on the dashboard of said towing vehicle, a transverse extending shaft extending through said case and being journaled within bearings in said end walls, a plastic arm secured to a central portion of said shaft, the terminal end of said plastic arm carrying a copper contact for bridging across said copper strips when said shaft is pivoted, said copper strips not extending to a lower portion of said case sidewall whereby said copper contact does not bridge the same, and said plastic arm being normally urged by a tension spring downward to prevent said contact engagement.
Claim 3
Dependent Claim
51 words
The combination as set forth in claim 1 wherein one end of a steel rod is secured to an outward extending end of said shaft, saId rod comprising a straight elongated member with an enlarged head at its opposite end for engaging a roadway surface in case of a flat tire.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |