US3635588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detent mechanism for retaining vanes in a circularly driven impeller
Assignee: Individual
•
Filing: 1970-02-16
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Granted: 1972-01-18
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Expires: 1990-02-16
Abstract
Abstract An air impeller is assembled on a group of vane holder end plates having slots therein, of somewhat crescent shape, to receive the ends of vanes held in alignment symmetrically around an axis, each vane holder end plate having coordinated therewith a spider spring which is fastened to the face of the vane holder plate, the spider spring having a plurality of circumferentially located resilient detent extensions, suited to engage each vane when it is slipped into place, the engagement being positive in a groove or notch in the vane, thereby to form a positively unitary assembled device for use in the blower.
Inventors
- 👤 Robert W Lester
- 👤 Thomas Rockson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:40
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/281; F04D29/282; F04D29/283
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
84 words
An impeller for an air-blowing device comprising an axis a part thereof serving as a shaft, bearings on said shaft and aligned therewith and mounted on said bearings, vane holder plates, symmetrically aligned vertically to said shaft and axially disposed, each of said vane holder plates being joined with a spider spring, said spider spring extending a detent to the level of a slot in the vane holder plate, and vanes inserted in said slots, positively engaged by the detent of said spider spring.
Claim 2
Dependent Claim
84 words
An impeller for an air-blowing device comprising an axis a part thereof serving as a shaft, bearings on said shaft and aligned therewith and mounted on said bearings, vane holder plates, symmetrically aligned vertically to said shaft and axially disposed, each of said vane holder plates being joined with a spider spring, said spider spring extending a detent to the level of a slot in the vane holder plate, and vanes inserted in said slots, positively engaged by the detent of said spider spring.
Claim 3
Dependent Claim
20 words
A combination in accordance with claim 1, in which the vane carries a recess for positive engagement by said detent.
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |