US4046488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiator cooling fan
Assignee: Individual
•
Filing: 1975-11-07
•
Granted: 1977-09-06
•
Expires: 1995-11-07
Abstract
Abstract An improved radiator cooling fan has a substantially planar mounting hub and individually twisted blades extending radially therefrom. Each blade includes reinforcing edges along a portion thereof to enhance durability and lengthen useful service life.
Inventors
- 👤 Robert G. Wickham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:57
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/38; F04D29/388; Y; Y10; Y10S; Y10S416/00; Y10S416/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
In a vehicle cooling system, the combination comprising: a vehicle engine and a radiator system for cooling said engine; and a spiderless fan associated with said radiator including a substantially planar, annular mounting hub; a plurality of elongated fan blades, each of said fan blades being twisted, having a radially extending reinforcing rib formed therein and being folded upon themselves along a portion less than the entire length of both the leading and trailing edges and being riveted to said hub through both of said folded edges, said folded edges extending radially beyond said hub and radially within said hub.
Claim 2
Dependent Claim
100 words
In a vehicle cooling system, the combination comprising: a vehicle engine and a radiator system for cooling said engine; and a spiderless fan associated with said radiator including a substantially planar, annular mounting hub; a plurality of elongated fan blades, each of said fan blades being twisted, having a radially extending reinforcing rib formed therein and being folded upon themselves along a portion less than the entire length of both the leading and trailing edges and being riveted to said hub through both of said folded edges, said folded edges extending radially beyond said hub and radially within said hub.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |