US3619080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal fan housing
Assignee: Carrier Corp
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Filing: 1970-01-21
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Granted: 1971-11-09
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Expires: 1990-01-21
Abstract
Abstract The centrifugal fan housing consists of not more than five parts, two of which are duplicate parts, which may be assembled with the inlet bell at either end of the housing and with the scroll located to provide for clockwise rotation or counterclockwise rotation of the fan. This arrangement provides a universal fan housing which is assembled from identical parts to suit any installation.
Inventors
- 👤 Charles E Bullock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:42
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/4206; F04D29/4226; F04D29/424
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
258 words
A centrifugal fan housing for either left- or right-hand discharge from the fan housing comprising a pair of end members complemental in form and dimension, each of said end members including a wall having a lineal edge surface and being formed with an elongated opening extending in a direction parallel to said lineal edge surface in areas of the wall at opposite sides of a plane extending perpendicular to said lineal surface medial of the ends thereof, a scroll member terminating at one end at a cutoff, means for reversibly mounting said scroll member intermediate said end members with said cutoff having a downstream extending surface substantially coplanar with said lineal edge surface, with the cutoff extending inwardly from a selected end of said lineal edge surface and terminating in spaced relation to the opposite end thereof to provide a discharge opening in one direction, a closure for the opening in the wall of each end member, one of said closures being formed with an inlet opening in one end area thereof, the wall of said one end member and said one closure having symmetrically arranged means cooperable to fix said one end closure to said one end member with the axis of the inlet opening in said one closure arranged in registration with the axis of said scroll is in said one direction and said closure being adapted in the opposite end area of said elongated opening to fix the axis of the inlet opening in registration with the axis of the scroll in the opposite direction.
Claim 2
Dependent Claim
258 words
A centrifugal fan housing for either left- or right-hand discharge from the fan housing comprising a pair of end members complemental in form and dimension, each of said end members including a wall having a lineal edge surface and being formed with an elongated opening extending in a direction parallel to said lineal edge surface in areas of the wall at opposite sides of a plane extending perpendicular to said lineal surface medial of the ends thereof, a scroll member terminating at one end at a cutoff, means for reversibly mounting said scroll member intermediate said end members with said cutoff having a downstream extending surface substantially coplanar with said lineal edge surface, with the cutoff extending inwardly from a selected end of said lineal edge surface and terminating in spaced relation to the opposite end thereof to provide a discharge opening in one direction, a closure for the opening in the wall of each end member, one of said closures being formed with an inlet opening in one end area thereof, the wall of said one end member and said one closure having symmetrically arranged means cooperable to fix said one end closure to said one end member with the axis of the inlet opening in said one closure arranged in registration with the axis of said scroll is in said one direction and said closure being adapted in the opposite end area of said elongated opening to fix the axis of the inlet opening in registration with the axis of the scroll in the opposite direction.
Claim 3
Dependent Claim
215 words
A centrifugal fan housing having means for adapting the fan housing for discharging in opposite directions, said fan housing comprising a pair of end members complemental in form and dimension and including a wall having a curved perimeter merging at its ends with a lineal surface, a scroll member mounted intermediate said end members, said scroll member terminating at one end at a cutoff, means for reversibly mounting said cutoff substantially coplanar with said lineal surface at a selected side of a plane extending perpendicular to said lineal surface medial of the ends thereof, the wall of one of said end members being formed with an elongated opening, extending in the area of said wall at opposite sides of said plane, a closure for said opening dimensioned comparable thereto, said closure being formed with an inlet opening, the wall of said one end member and said closure having symmetrically arranged means cooperable to fix said closure to said end member with the inlet opening in said closure in registration with the axis of said scroll in one direction of discharge and the wall of said end member and the closure member having means to fix said inlet opening in registration with the axis of said scroll when the discharge therefrom is in the opposite direction.
Claim 4
Dependent Claim
215 words
A centrifugal fan housing having means for adapting the fan housing for discharging in opposite directions, said fan housing comprising a pair of end members complemental in form and dimension and including a wall having a curved perimeter merging at its ends with a lineal surface, a scroll member mounted intermediate said end members, said scroll member terminating at one end at a cutoff, means for reversibly mounting said cutoff substantially coplanar with said lineal surface at a selected side of a plane extending perpendicular to said lineal surface medial of the ends thereof, the wall of one of said end members being formed with an elongated opening, extending in the area of said wall at opposite sides of said plane, a closure for said opening dimensioned comparable thereto, said closure being formed with an inlet opening, the wall of said one end member and said closure having symmetrically arranged means cooperable to fix said closure to said end member with the inlet opening in said closure in registration with the axis of said scroll in one direction of discharge and the wall of said end member and the closure member having means to fix said inlet opening in registration with the axis of said scroll when the discharge therefrom is in the opposite direction.
Claim 5
Dependent Claim
47 words
A centrifugal fan housing as set forth in claim 2 wherein the marginal area about said opening in said one end member is offset inwardly, and the perimeter of said closure being of complemental shape and dimension and overlapping said inwardly offset marginal portion of said wall.
Claim 6
Dependent Claim
65 words
A centrifugal fan housing as set forth in claim 2 wherein said opening is noncircular and the walls of said end members are formed on their inner surfaces with cutoff supporting beads at opposite sides of said plane, said beads extending in close parallel adjacency with said lineal surfaces, whereby said scroll and said cutoff may be mounted at either side of said medial plane.
Claim 7
Dependent Claim
75 words
A centrifugal fan housing as set forth in claim 1 wherein the closure for the opening in the wall of said other end member is formed with an opening to receive a fan supporting shaft, the wall of said other end member and said other closure having symmetrically arranged means cooperable to fix said other end closure to said other end member with said shaft receiving opening in registration with the axis of said scroll.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |