Patent US1954409A successfully refreshed from Google Patents.
Patent US3797961A successfully refreshed from Google Patents.
US3797961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal fan
Assignee: Individual
•
Filing: 1972-06-19
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Granted: 1974-03-19
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Expires: 1992-06-19
Abstract
Abstract A centrifugal fan, the rotor of which is driven through the agency of a support plate from the drive shaft of a motor or from the shaft of a V-belt drive, and incorporating a housing having a drive opening, a suction connection and a pressure connection, and wherein the housing is formed of at least three components. The one housing component having the pressure connection can be shifted or displaced relative to the other two side components having the drive opening and the suction connection, and can be fixed by means of a holding mechanism in desired position. According to the invention, the rotor is detachably connected with the support plate, and the ring-shaped disks of the rotor having the buckets or blades each possess at least two holes arranged symmetrically with respect to one another and extending coaxially with respect to the axis of the rotor.
Inventors
- 👤 H Brechbuhl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:58
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/4206; F04D29/4226; F04D29/60; F04D29/62; F04D29/624; F04D29/626
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
199 words
A centrifugal fan comprising a rotor having a support plate, drive means for said rotor, said rotor being driven through the agency of said support plate by said drive menas, a housing for said rotor having a drive opening, a suction connection and a pressure connection, said rotor housing being formed of at least three components, one of said housing components having the pressure connection, the other of said housing components defining two side housing components, one of said side housing components having the drive opening and the other said suction connection, said one housing component having said pressure connection having means engaging the two side components whereby the said one component having the discharge connection is turnable through 360* and shiftable by 180* relative to the other two side housing components, means for retaining the turned respectively shifted housing component in desired fixed position, means for detachably connecting the rotor with the support plate, said rotor having at least two ring-shaped disks equipped with rotor blade means, said ring shaped discs each possessing at least two mutually symmetrically arranged holes which extend coaxially and in parallel with regard to the rotor axis whereby the rotor maybe shifted 180*.
Claim 2
Dependent Claim
199 words
A centrifugal fan comprising a rotor having a support plate, drive means for said rotor, said rotor being driven through the agency of said support plate by said drive menas, a housing for said rotor having a drive opening, a suction connection and a pressure connection, said rotor housing being formed of at least three components, one of said housing components having the pressure connection, the other of said housing components defining two side housing components, one of said side housing components having the drive opening and the other said suction connection, said one housing component having said pressure connection having means engaging the two side components whereby the said one component having the discharge connection is turnable through 360* and shiftable by 180* relative to the other two side housing components, means for retaining the turned respectively shifted housing component in desired fixed position, means for detachably connecting the rotor with the support plate, said rotor having at least two ring-shaped disks equipped with rotor blade means, said ring shaped discs each possessing at least two mutually symmetrically arranged holes which extend coaxially and in parallel with regard to the rotor axis whereby the rotor maybe shifted 180*.
Claim 3
Dependent Claim
70 words
The centrifugal fan as defined in claim 1, wherein said one housing component having said pressure connection contains projection means, said retaining means comprising two flat clamping rings located at said projection means of said one housing component having said pressure connection, each of said clamping rings having two respectiVe free ends forming a collar, and a respective clamping screw for adjustably connecting with one another said respective free ends.
Claim 4
Dependent Claim
38 words
The centrifugal fan as defined in claim 2, wherein one of said flat clamping rings is positioned on one side of said housing and the other flat clamping ring is positioned on the opposite side of said housing.
References Cited (Backward Citations)
US1471559A
Cited
US1519245A
Cited
GB220454A
Cited
US1908427A
Cited
US2986095A
Cited
FR1273994A
Cited
US3145912A
Cited
US3619080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |