Patent US-1909-934717
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Many fan propellers, in pairs, with 'feathering' motion to maximize downstroke; vertical lift envisioned thus: "as the blades are evenly distributed around the entire frame and are of exactly the same area, and travel at uniform speed, the lifting force will be equal at all points, and the machine will rise in a vertical line"
- Tech class CPC B64C39/005: Aircraft not otherwise provided for with wings, paddle wheels, bladed wheels, moving or rotating in relation to the fuselage about a horizontal transversal axis
- Inventor location: Minot, Ward county, ND (FIPSloc=38101)
Sources
- Patent 934717 document and bibliographic info on espacenet
- Patent 934717 at google patents
- Short's DB
- PTO 244
| Year filed | 1908 |
|---|---|
| Year granted | 1909 |
| Office | US |
| Patent number | 934717 |
| Inventors | De Witt C Dorman |
| Inventor country | US |
| Applicant person | De Witt C Dorman |
| Applicant firm | |
| Applicant type | INDIV |
| Applicant is inventor? | 1 |
| Original title | Flying-machine |
| English title | Flying-machine |
| Tech fields | aerodrome, propulsion, navigation |
| Filing date | 1908-12-21 |
| Full specification filed date | |
| Application number | 1908468598 |
| Grant date | September 21, 1909 |
| Granted? | 1 |
| Publication date | |
| Supplementary to patent | |
| Related to aircraft? | 1 |
| Serial number | 468598 |
| Patent agent | C. A. Snow & Co. |
| Assigned to | |
| National tech categories | USPC 244/20 |
| IPCs | IPC B64C39/00 |
| CPCs | CPC B64C39/005 |
| Family year | 1908 |
| First filing? | 1 |
| Cites these patents | |
| Citations from after 1930 | 0 |
| Application ID | 47228219 |
| INPADOC family ID | 43877296 |
| Number of text pages | 3 |
| Number of diagram pages | 3 |
| Number of figures | 7 |
| Number of claims | 6 |
