US3816023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blower wheel construction
Assignee: Deutz Allis Corp
•
Filing: 1972-10-02
•
Granted: 1974-06-11
•
Expires: 1992-10-02
Abstract
Abstract This invention relates to the attachment of blower wheel blades to support discs with interlocking notches secured by the wedging action of an internal spring retaining ring acting between the disc and the sloping surface of an inner notch in the blades.
Inventors
- 👤 J Shaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:45
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/02; F04D17/04; F04D29/00; F04D29/26; F04D29/28; F04D29/281; F04D29/282; F04D29/283
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
137 words
A fan rotor comprising a pair of discs longitudinally spaced apart and attached to rotatable means; a plurality of arcuate blades supported on said discs longitudinally parallel to the axis of rotation of said rotor; said discs being provided with a plurality of closed slots therein with each slot having an arcuate surface complementary to said blades; said slots being of a size permitting said blades to be inserted endwise therethrough; said blades being provided with notches spaced apart longitudinally the same as the spacing between the discs so that when said blades are slid longitudinally through said slots registry is obtained between said notches and said discs; and radially outward acting spring means positioned adjacent said discs and contacting radially inner portions of said blades for biasing same radially outward interlocking said blades with said discs.
Claim 2
Dependent Claim
137 words
A fan rotor comprising a pair of discs longitudinally spaced apart and attached to rotatable means; a plurality of arcuate blades supported on said discs longitudinally parallel to the axis of rotation of said rotor; said discs being provided with a plurality of closed slots therein with each slot having an arcuate surface complementary to said blades; said slots being of a size permitting said blades to be inserted endwise therethrough; said blades being provided with notches spaced apart longitudinally the same as the spacing between the discs so that when said blades are slid longitudinally through said slots registry is obtained between said notches and said discs; and radially outward acting spring means positioned adjacent said discs and contacting radially inner portions of said blades for biasing same radially outward interlocking said blades with said discs.
Claim 3
Dependent Claim
21 words
A fan rotor as recited in claim 1 and wherein said notches are provided in the outer portion of said blades.
Claim 4
Dependent Claim
20 words
A fan rotor as recited in claim 1 wherein said notches are provided in the inner portion of said blades.
Claim 5
Dependent Claim
54 words
A fan rotor as recited in claim 2 and wherein said blades are provided with inner notches in radial alignment with said outer notches, and said spring means being received in said inner notches for biasing said blades radially outward against a surface of said disc extending generally parallel the periphery of said disc.
Claim 6
Dependent Claim
34 words
A fan rotor as recited in claim 4 and wherein said spring means comprises ring shaped springs positioned on each side of each disc and in contact therEwith and positioned in said inner notches.
Claim 7
Dependent Claim
67 words
A fan rotor as recited in claim 5 and wherein said spring means includes a ring shaped spring having an opening therein, an offset portion extending at right angles thereto and into one of said slots so that said offset portion prevents rotation of said spring means relative to said disc, said offset portion being of size to counterbalance said spring means relative to said opening therein.
Claim 8
Dependent Claim
25 words
A fan rotor as recited in claim 6 and wherein said notches are tapered to provide a locking engagement between said blades and said discs.
Claim 9
Dependent Claim
27 words
A fan rotor as recited in claim 7 and wherein the distal ends of said discs are turned over at right angles thereto for stiffening said rotor.
Claim 10
Dependent Claim
56 words
A fan motor as recited in claim 3 wherein said spring means is received in said notches in the inner portion of said blades whereby said spring means biases said blades radially outward against the outer ends of said slots and locks said blades against movement in at least one axial direction relative to said discs.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |