US3799697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible bladed fan with tab connected reinforcing member
Assignee: Siemens Bendix Automotive Electronics Ltd
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Filing: 1972-11-29
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Granted: 1974-03-26
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Expires: 1992-11-29
Abstract
Abstract An automotive cooling fan having a flexible blade connected to a reinforcing member along the blade leading edge by lance tabs integral with the reinforcing member.
Inventors
- 👤 Jong A De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:49
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/38; F04D29/382
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
207 words
In an automotive cooling fan comprising a hub, a plurality of arms projecting radially outwardly from said hub, a blade positioned against one side of each of said arms, said blade extending transversely from a leading edge, defined by the direction of fan rotation, adjacent said arm to a trailing edge behind said arm, a reinforcing member positioned against each said blade on the side thereof opposite the arm against which the blade is positioned and extending forwardly of said leading edge, each said blade thereby positioned between an overlying reinforcing member and an arm, said blade and said reinforcing member extending together radially beyond said arm, fasteners adjacent said arm securing said blade, reinforcing member and arm together, and fastening means radially beyond said arm securing said blade and said reinforcing member together, that improvement in which each said fastening means comprises a lance tab integrally connected to said reinforcing member parallel to and adjacent said blade leading edge, the remainder of said tab cut from said reinforcing member, said tab extending from adjacent said blade leading edge toward said trailing edge, and said tab bent from said reinforcing member around said blade leading edge and against the side of said blade opposite said reinforcing member.
Claim 2
Dependent Claim
207 words
In an automotive cooling fan comprising a hub, a plurality of arms projecting radially outwardly from said hub, a blade positioned against one side of each of said arms, said blade extending transversely from a leading edge, defined by the direction of fan rotation, adjacent said arm to a trailing edge behind said arm, a reinforcing member positioned against each said blade on the side thereof opposite the arm against which the blade is positioned and extending forwardly of said leading edge, each said blade thereby positioned between an overlying reinforcing member and an arm, said blade and said reinforcing member extending together radially beyond said arm, fasteners adjacent said arm securing said blade, reinforcing member and arm together, and fastening means radially beyond said arm securing said blade and said reinforcing member together, that improvement in which each said fastening means comprises a lance tab integrally connected to said reinforcing member parallel to and adjacent said blade leading edge, the remainder of said tab cut from said reinforcing member, said tab extending from adjacent said blade leading edge toward said trailing edge, and said tab bent from said reinforcing member around said blade leading edge and against the side of said blade opposite said reinforcing member.
Claim 3
Dependent Claim
30 words
The improvement claimed in claim 1 in which said blade lies on the upstream side of said arm and said reinforcing member lies on the upstream side of said blade.
Claim 4
Dependent Claim
17 words
The improvement claimed in claim 1 in which said fastening means comprises a plurality of said tabs.
Claim 5
Dependent Claim
30 words
The improvement claimed in claim 1 in which said tab includes a central depression, said depression contacting and lying against said blade on said side thereof opposite said reinforcing member.
Claim 6
Dependent Claim
37 words
The improvement claimed in claim 4 in which said tab is integrally connected to said reinforcing member parallel to and adjacent said blade leading edge and the remainder of said tab is cut from said reinforcing member.
Claim 7
Dependent Claim
30 words
The improvement claimed in claim 5 in which said blade lies on the upstream side of said arm and said reinforcing member lies on the upstream side of said blade.
Claim 8
Dependent Claim
17 words
The improvement claimed in claim 6 in which said fastening means comprises a plurality of said tabs.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |