US3749519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan, particularly for cooling systems in motor vehicles
Assignee: Individual
•
Filing: 1971-03-09
•
Granted: 1973-07-31
•
Expires: 1991-03-09
Abstract
Abstract A fan, particularly for cooling systems in motor vehicles, wherein the fan hub consists of outer and inner hub parts which are inserted one within the other and fastened together. The outer hub part carries the fan blades and the inner hub part, which may optionally be composed of two or more segments, is provided with the device for connection to the clutch and being made of a nonmetallic material having greater resistance to heat than the material of which the outer hub part carrying the fan blades is made.
Inventors
- 👤 A Ryba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:51
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/325; F04D29/329; F04D29/02; F04D29/023; F05; F05D; F05D2300/00; F05D2300/40; F05D2300/43; F05D2300/433; F05D2300/50; F05D2300/502; F05D2300/5024
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
152 words
Fan blade apparatus, comprising: a first hollow outer hub part having a plurality of fan blades fixed thereto; a nonmetallic, second inner huB part insertable onto said first hub part; means for securing said second inner hub part to the interior of said first outer hub part; and connection means on said second hub part being adapted to couple said second hub part to drive means, said drive means producing heat and transmitting said heat to said connection means and said second hub part, said first hub part being made in one piece with the fan blades of a thermoplastic material having a low resistance to heat flow, for example polypropylene, and said second hub part carrying fastening lugs integral with it for connection to said drive means and being made of a thermoplastic material having a high resistance to heat flow, such as for example teflon, hostaflon, polyamide, or the like.
Claim 2
Dependent Claim
152 words
Fan blade apparatus, comprising: a first hollow outer hub part having a plurality of fan blades fixed thereto; a nonmetallic, second inner huB part insertable onto said first hub part; means for securing said second inner hub part to the interior of said first outer hub part; and connection means on said second hub part being adapted to couple said second hub part to drive means, said drive means producing heat and transmitting said heat to said connection means and said second hub part, said first hub part being made in one piece with the fan blades of a thermoplastic material having a low resistance to heat flow, for example polypropylene, and said second hub part carrying fastening lugs integral with it for connection to said drive means and being made of a thermoplastic material having a high resistance to heat flow, such as for example teflon, hostaflon, polyamide, or the like.
Claim 3
Dependent Claim
156 words
Fan blade apparatus, comprising: a first hollow outer hub part having a plurality of fan blades fixed thereto; a nonmetallic, second inner hub part insertable onto said first hub part; means for securing said second inner hub part to the interior of said first outer hub part; and connection means on said second hub part being adapted to couple said second hub part to drive means, said drive means produring heat and transmitting said heat to said connection means and said second hub part, said first hub part being made unitary with said fan blades of a thermoplastic material having a low resistance to heat flow, for example polypropylene, polyamide and said second hub part carries fastening lugs integral with it for connection to said drive means and being made together with said fastening lugs of a hardenable non-remeltable plastics material having a high resistance to heat flow, for example a phenoplast, silicone, or the like.
Claim 4
Dependent Claim
156 words
Fan blade apparatus, comprising: a first hollow outer hub part having a plurality of fan blades fixed thereto; a nonmetallic, second inner hub part insertable onto said first hub part; means for securing said second inner hub part to the interior of said first outer hub part; and connection means on said second hub part being adapted to couple said second hub part to drive means, said drive means produring heat and transmitting said heat to said connection means and said second hub part, said first hub part being made unitary with said fan blades of a thermoplastic material having a low resistance to heat flow, for example polypropylene, polyamide and said second hub part carries fastening lugs integral with it for connection to said drive means and being made together with said fastening lugs of a hardenable non-remeltable plastics material having a high resistance to heat flow, for example a phenoplast, silicone, or the like.
Claim 5
Dependent Claim
150 words
Fan blade apparatus, comprising: a first hollow outer hub part having a plurality of fan blades fixed thereto; a nonmetallic second inner hub part insertable onto said first hub part; means for securing said second inner hub part to the interior of said first outer hub part; and connection means on said second hub part being adapted to couple said second hub part to drive means, said drive means producing heat and transmitting said heat to said connection means and said second hub part, said first hub part being made unitary with said fan blades of a thermoplastic material having a low resistance to heat, for example polypropylene, polyamide and said second hub part carrying fastening lugs integral with it for connection to said drive means and being made together with said fastening lugs of a thermosetting plastics material having a high resistance to heat flow, such as bakelite, silicone.
Claim 6
Dependent Claim
150 words
Fan blade apparatus, comprising: a first hollow outer hub part having a plurality of fan blades fixed thereto; a nonmetallic second inner hub part insertable onto said first hub part; means for securing said second inner hub part to the interior of said first outer hub part; and connection means on said second hub part being adapted to couple said second hub part to drive means, said drive means producing heat and transmitting said heat to said connection means and said second hub part, said first hub part being made unitary with said fan blades of a thermoplastic material having a low resistance to heat, for example polypropylene, polyamide and said second hub part carrying fastening lugs integral with it for connection to said drive means and being made together with said fastening lugs of a thermosetting plastics material having a high resistance to heat flow, such as bakelite, silicone.
References Cited (Backward Citations)
FR667276A
Cited
GB733578A
Cited
US2836348A
Cited
FR1234570A
Cited
FR1327385A
Cited
US3260312A
Cited
US3241493A
Cited
US3332500A
Cited
US3408944A
Cited
US3622249A
Cited
US3659471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |