Patent US3856431A successfully refreshed from Google Patents.
US3856431A
Expired / Lapsed
US
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Side expansion scroll-type blowers
Assignee: MERCANTILE TEXAS CREDIT Corp
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Filing: 1973-10-24
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Granted: 1974-12-24
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Expires: 1993-10-24
Abstract
Abstract An expanding scroll-type blower unit with a fan wheel which discharges air peripherally from an encasing housing and has axial air intakes is provided with sides diverging toward an exit opening that is parallel to the blower axis, and two such blower units are arranged side by side in axially alignment with a motor therebetween operatively connected to both wheels.
Inventors
- 👤 C Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:27
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/4206; F04D29/4226; F04D17/00; F04D17/08; F04D17/16; F04D17/162
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
A blower unit comprising a fan wheel from which air is discharged peripherally, and a housing for said wheel including sloping side surfaces between which the wheel is wholly located, the side surfaces including openings through which air enters the housing, said housing also including ducting between the openings in the side wall and fan wheel through which the inlet air may flow to the wheel in directions generally parallel to the axis of said wheel and including a surface between the side surfaces extending in the form of a spiral about the wheel to an opening from which air moved by the wheel may be expelled, said side surfaces extending in directions diverging toward the exit opening.
Claim 2
Dependent Claim
118 words
A blower unit comprising a fan wheel from which air is discharged peripherally, and a housing for said wheel including sloping side surfaces between which the wheel is wholly located, the side surfaces including openings through which air enters the housing, said housing also including ducting between the openings in the side wall and fan wheel through which the inlet air may flow to the wheel in directions generally parallel to the axis of said wheel and including a surface between the side surfaces extending in the form of a spiral about the wheel to an opening from which air moved by the wheel may be expelled, said side surfaces extending in directions diverging toward the exit opening.
Claim 3
Dependent Claim
26 words
The combination of claim 1 wherein the side surfaces are planar and the openings therein, of which there is one in each side surface, are circular.
Claim 4
Dependent Claim
20 words
The combination of claim 2 wherein the centers of said circular openings are on the axis of the fan wheel.
Claim 5
Dependent Claim
42 words
In combination, a pair of blower units each as defined in claim 1 with the axes of the blower wheels in alignment and motor means between adjacent side walls of the units operatively connected to the wheels for simultaneously driving said wheels.
References Cited (Backward Citations)
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Cited
US1906533A
Cited
US2290423A
Cited
US2710573A
Cited
US3098603A
Cited
US3407995A
Cited
US3480202A
Cited
US3780411A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |