Patent US1015311A successfully refreshed from Google Patents.
Patent US4883107A successfully refreshed from Google Patents.
US4883107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air inlet and automatic pressure adjustment device for a tire
Assignee: Calibrated Tire Valves Inc
•
Filing: 1987-12-04
•
Granted: 1989-11-28
•
Expires: 2007-12-04
Abstract
Abstract A dual valve assembly with calibrated or adjustable spring loading that may be attached to a valve stem on a tire to allow slightly over pressuring the tire with air and which then automatically adjusts the pressure in the tire to match a spring loading calibration.
Inventors
- 👤 Kenneth B. Keys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:35
CPC Classifications
B; B60; B60C; B60C29/00; B60C29/06; B60C29/068
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
146 words
An assembly to allow air filling and automatic pressure adjustment of a tire comprising: (a) a housing means with an externally threaded upper end (b) an adjustable loading spring contained in said housing means (c) a secondary valve held down by said adjustable loading spring (d) a primary valve with a stem extending through the top of said housing means and through said secondary valve (e) a seat in said secondary valve to seat said primary valve (f) a return spring around said stem of said primary valve that urges said primary valve to seat in said secondary valve, and (g) wherein said housing means is a cap containing an internal collar threaded externally under said secondary valve with said collar containing a depessor spring to open a valve core valve in a valve stem and further serving the purpose of adjusting said adjustable loading spring.
Claim 2
Dependent Claim
146 words
An assembly to allow air filling and automatic pressure adjustment of a tire comprising: (a) a housing means with an externally threaded upper end (b) an adjustable loading spring contained in said housing means (c) a secondary valve held down by said adjustable loading spring (d) a primary valve with a stem extending through the top of said housing means and through said secondary valve (e) a seat in said secondary valve to seat said primary valve (f) a return spring around said stem of said primary valve that urges said primary valve to seat in said secondary valve, and (g) wherein said housing means is a cap containing an internal collar threaded externally under said secondary valve with said collar containing a depessor spring to open a valve core valve in a valve stem and further serving the purpose of adjusting said adjustable loading spring.
Claim 3
Dependent Claim
46 words
An assembly to allow air filling and automatic pressure adjustment in a tire as in claim 1 where said cap further has a threaded second cap that may be used to adjust said adjustable loading spring while said cap is threaded on to said valve stem.
References Cited (Backward Citations)
US1330108A
Cited
US2690757A
Cited
US2987071A
Cited
US3450147A
Cited
US4153096A
Cited
US4445527A
Cited
US4606391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |