US3796511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blower
Assignee: FRIGIDRAULIC Inc
•
Filing: 1972-06-15
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Granted: 1974-03-12
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Expires: 1992-06-15
Abstract
Abstract A blower is comprised of a substantially cylindrical housing having end walls and an arcuate wall forming a substantially cylindrical chamber. A discharge opening is formed in the arctuate wall and an intake opening is formed in at least one of the end walls. A cylindrical fan rotor is rotatably mounted within the chamber for drawing air into the chamber through the intake opening and for propelling it around the interior of the chamber and outwardly through the discharge opening. There is a slot in the arcuate wall adjacent the discharge opening, and a skinning member protrudes radially inwardly adjacent the slot for directing a thin layer of air adjacent the arcuate wall of the chamber outwardly through the slot so as to remove dust particles adjacent the outer peripheral edge of the housing wall.
Inventors
- 👤 R Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:16
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/70; F04D29/701
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
201 words
A blower comprising a substantially cylindrical housing having end walls and an arcuate wall forming a substantially cylindrical chamber; a discharge opening formed in said arcuate wall; an intake opening formed in at least one of said end walls; a cylindrical fan rotor rotatably mounted within said chamber for drawing air into said chamber through said intake opening and for propelling it around the interior of said cylindrical chamber and outwardly through said discharge opening, said rotor having an outer cylindrical surface in inward spaced relation to said arcuate wall of said housing and generally comprising an open space surrounded by a cylindrical wall of fan blade elements, a baffle plate being rigidly connected to said housing and protuding within said open space in said rotor, said baffle plate being positioned to prevent direct passage of air from said open space radially outwardly toward said slot; a slot in said arcuate wall adjacent said discharge opening; a skimming member protruding radially inwardly adjacent said slot for directing a thin layer of air adjacent said arcuate wall outwardly through said slot, whereby the majority of the air being blown by said fan rotor bypasses said slot and exits through said discharge opening.
Claim 2
Dependent Claim
201 words
A blower comprising a substantially cylindrical housing having end walls and an arcuate wall forming a substantially cylindrical chamber; a discharge opening formed in said arcuate wall; an intake opening formed in at least one of said end walls; a cylindrical fan rotor rotatably mounted within said chamber for drawing air into said chamber through said intake opening and for propelling it around the interior of said cylindrical chamber and outwardly through said discharge opening, said rotor having an outer cylindrical surface in inward spaced relation to said arcuate wall of said housing and generally comprising an open space surrounded by a cylindrical wall of fan blade elements, a baffle plate being rigidly connected to said housing and protuding within said open space in said rotor, said baffle plate being positioned to prevent direct passage of air from said open space radially outwardly toward said slot; a slot in said arcuate wall adjacent said discharge opening; a skimming member protruding radially inwardly adjacent said slot for directing a thin layer of air adjacent said arcuate wall outwardly through said slot, whereby the majority of the air being blown by said fan rotor bypasses said slot and exits through said discharge opening.
Claim 3
Dependent Claim
31 words
A blower according to claim 1 wherein said slot and said skimming member extend transversely across said housingg from one of said end walls to the other of said end walls.
Claim 4
Dependent Claim
33 words
A blower according to claim 2 wherein said skimming member protrudes radially inwardly to a point less than half the distance from said arcuate wall to said outer cylindrical surface of said rotor.
Claim 5
Dependent Claim
23 words
A blower according to claim 3 wherein said baffle plate is arcuate and is concentric to said cylindrical wall of fan blade elements.
Claim 6
Dependent Claim
21 words
A blower according to claim 4 wherein said baffle plate is adjacent and spaced from said wall of fan blade elements.
Claim 7
Dependent Claim
27 words
A blower according to claim 1 wherein said rotor rotates about a rotational axis which is offset with respect to the cylindrical axis of said cylindrical housing.
Claim 8
Dependent Claim
59 words
A blower according to claim 1 wherein said skimming member is arcuate and protrudes tangentially inwardly from said arcuate wall in a circumferential direction opposite from the rotational direction of said rotor whereby said skimming member provides a smooth continuous path for said thin layer of air as said thin layer of air is directed outwardly through said slot.
Claim 9
Dependent Claim
24 words
A blower according to claim 1 wherein the baffle plates extend around less tha 180* of the circumference of the interior of the rotor.
Claim 10
Dependent Claim
23 words
A blower according to claim 8 wherein the baffle plates extend around about 90* of the circumference of the interior of the rotor.
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |