Patent US3659959A successfully refreshed from Google Patents.
US3659959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air fan impeller blade assembly
Assignee: HS DEECO Inc A CORP OF
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Filing: 1970-07-15
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Granted: 1972-05-02
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Expires: 1990-07-15
Abstract
Abstract This impeller is constructed from two, identical, preformed metal blanks, which have raised center or hub sections which are secured to one another by riveting or the like. Opposite ends of each blade are laterally offset from one another slightly. Oppositely extending tabs are struck up from opposite sides of each blade at opposite sides of the hub section to provide slots by which the blades are interconnected to extend at right angles to one another. The tabs of one blade are secured to the hub section of the other blade to lend rigidity to the hub sections. A separate bearing may be secured in registering central openings in the hubs of the two blades to accommodate the armature shaft of a drive motor.
Inventors
- 👤 Allan Holstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:29
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/38; F04D29/388
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
165 words
A rotary air fan impeller, comprising a pair of elongate, identically-shaped members having central flat hub portions disposed in contiguity, each of said members having a pair of blades integral with, and projecting from, opposite sides of its hub portion and inclined, respectively, in opposite directions relative to its hub portion, the two blades of each member being laterally offset relative to one another, and extending transverse to the blades of the other member, and each blade having a tab at its inner end integral therewith, the tabs of the two blades of each member extending in opposite directions along opposite sides, respectively, of the hub portion of that member in laterally spaced relation thereto, being offset relative to the plane of said hub portion, and projecting in opposite directions over the hub portion of the other member, and means securing the tabs of one member to the hub portion of the other member and for securing the hub portions of the two members together.
Claim 2
Dependent Claim
165 words
A rotary air fan impeller, comprising a pair of elongate, identically-shaped members having central flat hub portions disposed in contiguity, each of said members having a pair of blades integral with, and projecting from, opposite sides of its hub portion and inclined, respectively, in opposite directions relative to its hub portion, the two blades of each member being laterally offset relative to one another, and extending transverse to the blades of the other member, and each blade having a tab at its inner end integral therewith, the tabs of the two blades of each member extending in opposite directions along opposite sides, respectively, of the hub portion of that member in laterally spaced relation thereto, being offset relative to the plane of said hub portion, and projecting in opposite directions over the hub portion of the other member, and means securing the tabs of one member to the hub portion of the other member and for securing the hub portions of the two members together.
Claim 3
Dependent Claim
41 words
An air fan impeller as defined in claim 1, wherein each of said blades is bowed about an axis extending longitudinally thereof, and the two blades of each member are twisted slightly in opposite directions relative to the associated hub portion.
Claim 4
Dependent Claim
37 words
An air fan impeller as defined in claim, 2, wherein the hub of each of said members has two diametrally opposite web portions extending transversely and connecting its hub portion with the adjacent ends of its blades.
Claim 5
Dependent Claim
28 words
An air fan impeller as defined in claim 1, wherein the hub portion of each of said members is inclined to the longitudinal side edges of its blades.
Claim 6
Dependent Claim
205 words
A rotary impeller comprising two blade members disposed at an angle to one another, each member having a flat, central hub portion and two blade portions projecting respectively from opposite sides of said hub portion and inclined in opposite directions, respectively, to the plane of said hub portion, the hub portion of each blade member lying in a plane transverse to the axis of the impeller, and each blade member having two generally right angular slots therein extending inwardly from opposite side edges, respectively, of the blade member and along opposite sides of the hub portion of the blade member, to form two tabs at opposite sides of the blade member that extend longitudinally of the blade member in opposite directions, one blade portion of a blade member being offset laterally relative to the other blade portion of that blade member, and the two blade members being disposed in internested relation with the hub portion of one blade member extending through the slots and under the tabs of the other blade member, and with the hub portions of the two members axially aligned one above the other, the two tabs of each blade member being fixed to the hub portion of the other blade member.
Claim 7
Dependent Claim
205 words
A rotary impeller comprising two blade members disposed at an angle to one another, each member having a flat, central hub portion and two blade portions projecting respectively from opposite sides of said hub portion and inclined in opposite directions, respectively, to the plane of said hub portion, the hub portion of each blade member lying in a plane transverse to the axis of the impeller, and each blade member having two generally right angular slots therein extending inwardly from opposite side edges, respectively, of the blade member and along opposite sides of the hub portion of the blade member, to form two tabs at opposite sides of the blade member that extend longitudinally of the blade member in opposite directions, one blade portion of a blade member being offset laterally relative to the other blade portion of that blade member, and the two blade members being disposed in internested relation with the hub portion of one blade member extending through the slots and under the tabs of the other blade member, and with the hub portions of the two members axially aligned one above the other, the two tabs of each blade member being fixed to the hub portion of the other blade member.
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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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |