Patent US3825369A successfully refreshed from Google Patents.
US3825369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight fan
Assignee: Hayes-Albion Corp
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Filing: 1972-09-13
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Granted: 1974-07-23
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Expires: 1992-09-13
Abstract
Abstract A lightweight automotive fan having a plastic core and high strength metal sheets applied to the front and rear faces of the core.
Inventors
- 👤 R Albertzart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:20
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/38; F04D29/388; F04D29/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
A lightweight automotive fan comprising: a one-piece plastic core member defining a central hub portion and a plurality of arms extending radially from said hub for stiffening the blade portions of said fan; and thin metal facing sheet members bonded to the front and rear portions of said core member; said facing sheet members substantially covering said faces of said core member and defining a hub portion, a relatively narrow intermediate arm portion, and a relatively wide fan blade portion of greater dimension than said arm portion of said core member sandwiched between said fan blade portions of said facing sheet members; said fan blade portions of said facing sheet members being joined to each other at their respective leading and trailing edges and being curved rearwardly to form a radially untwisted, airfoil shaped fan blade.
Claim 2
Dependent Claim
136 words
A lightweight automotive fan comprising: a one-piece plastic core member defining a central hub portion and a plurality of arms extending radially from said hub for stiffening the blade portions of said fan; and thin metal facing sheet members bonded to the front and rear portions of said core member; said facing sheet members substantially covering said faces of said core member and defining a hub portion, a relatively narrow intermediate arm portion, and a relatively wide fan blade portion of greater dimension than said arm portion of said core member sandwiched between said fan blade portions of said facing sheet members; said fan blade portions of said facing sheet members being joined to each other at their respective leading and trailing edges and being curved rearwardly to form a radially untwisted, airfoil shaped fan blade.
Claim 3
Dependent Claim
21 words
The automotive fan set forth in claim 1 wherein said plastic is polypropylene and said metal facing members are stainless steel.
Claim 4
Dependent Claim
16 words
The automotive fan set forth in claim 1 wherein said facing members are substantially identically shaped.
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |