US4871189B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Truck cab suspension system
Assignee: Individual
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Filing: 1987-08-28
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Granted: 1998-03-17
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Expires: 2007-08-28
Abstract
Abstract The present invention relates to a suspension means for supporting the cab of a truck cab on a truck chassis frame. More particularly, it relates to a means of fine tuning the frequency response of the spring mass system to isolate all of the modes of the frame and still control hard jounces. The suspension includes air springs, an air reservoir, an hydraulic shock absorber, and height control valve. An air reservoir serves to lower the spring rate of the air spring, and an orifice causes nonlinear air damping of the system.
Inventors
- 👤 Charles A Van Breemen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:02
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/02; F16F9/04; F16F9/05; B; B60; B60G; B60G11/00; B60G11/26; B60G11/28; B60G11/30; B60G99/00; B60G99/002; B62; B62D; B62D33/00; B62D33/06; B62D33/0604; B62D33/0608; B60G2202/00; B60G2202/10; B60G2202/15; B60G2202/152
Claims Analysis
Total Claims: 0
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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) | 2001-03-16 | 2001-09-15 | 2002-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-16 | 2005-09-15 | 2006-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-16 | 2009-09-15 | 2010-03-17 | $7700.00 | Window Closed / Lapsed |