US3130677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable pitch fan
Assignee: Individual
•
Filing: 1962-01-29
•
Granted: 1964-04-28
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Expires: 1982-01-29
Abstract
No abstract record available.
Inventors
- 👤 Dorsey M Liebhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:51
CPC Classifications
F; F03; F03D; F03D1/00; F03D1/06; F03D1/065; F03D1/0658; A; A01; A01M; A01M7/00; A01M7/0003; A01M7/0014; B; B64; B64C; B64C11/00; B64C11/02; B64C11/04; B64C11/06; B64C11/065; F03D7/00; F03D7/02; F03D7/022; F03D7/0224; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/34; F04D29/36; F05; F05B; F05B2220/00; F05B2220/30; F05B2220/31; F05B2260/00; F05B2260/70; F05B2260/74; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
A VARIABLE PITCH FAN FOR DRIVING A ROTARY MECHANISM COMPRISING A BODY PLATE HAVING A HUB FOR A SHAFT, A PLURALITY OF SEMI-CYLINDRICAL RECESSES IN SAID PLATE RADIAL TO SAID HUB, A PLURALITY OF BOLTS PARALLEL WITH THE AXIS OF SAID HUB PASSING THROUGH SAID BODY PLATE, A SADDLE PLATE MOUNTED ON SAID BOLTS AND HAVING SEMI-CYLINDRICAL RECESSES MATING WITH SAID FIRST RECESSES TO FORM CYLINDRICAL BORES, FAN BLADES HAVING CYLINDRICAL SHANKS IN SAID BORES, PINS ON SAID SHANKS RADIAL TO SAID SHANKS, SAID SADDLE PLATE HAVING OPENINGS FOR SAID PINS, A SECOND PLURALITY OF BOLTS PARALLEL WITH THE AXIS OF SAID HUB AND PASSING THROUGH SAID BODY AND SADDLE PLATES, A ROTATABLE PITCH PLATE ADJACENT SAID SADDLE PLATE HAVING ARCUATE SLOTS FOR MOUNTING THE PITCH PLATE FOR LIMITED ROTATION ON SAID LAST BOLTS, SAID PITCH PLATE HAVING NOTCHES IN ITS EDGE PORTIONS ENGAGING THE PINS OF ALL OF SAID BLADE SHANKS AND ARRANGED TO CHANGE THE PITCH OF ALL THE BLADES IN UNISON, NUTS ON SAID FIRST PLURALITY OF BOLTS FOR CLAMPING SAID BODY AND SADDLE PLATES AGAINST SAID BLADE SHANKS, AND NUTS ON SAID SECOND PLURALITY OF BOLTS TO CLAMP ALL OF SAID PLATES TOGETHER AND PREVENT ROTATION OF SAID PITCH PLATE RELATIVE TO SAID BODY AND SADDLE PLATES.
Claim 2
Dependent Claim
211 words
A VARIABLE PITCH FAN FOR DRIVING A ROTARY MECHANISM COMPRISING A BODY PLATE HAVING A HUB FOR A SHAFT, A PLURALITY OF SEMI-CYLINDRICAL RECESSES IN SAID PLATE RADIAL TO SAID HUB, A PLURALITY OF BOLTS PARALLEL WITH THE AXIS OF SAID HUB PASSING THROUGH SAID BODY PLATE, A SADDLE PLATE MOUNTED ON SAID BOLTS AND HAVING SEMI-CYLINDRICAL RECESSES MATING WITH SAID FIRST RECESSES TO FORM CYLINDRICAL BORES, FAN BLADES HAVING CYLINDRICAL SHANKS IN SAID BORES, PINS ON SAID SHANKS RADIAL TO SAID SHANKS, SAID SADDLE PLATE HAVING OPENINGS FOR SAID PINS, A SECOND PLURALITY OF BOLTS PARALLEL WITH THE AXIS OF SAID HUB AND PASSING THROUGH SAID BODY AND SADDLE PLATES, A ROTATABLE PITCH PLATE ADJACENT SAID SADDLE PLATE HAVING ARCUATE SLOTS FOR MOUNTING THE PITCH PLATE FOR LIMITED ROTATION ON SAID LAST BOLTS, SAID PITCH PLATE HAVING NOTCHES IN ITS EDGE PORTIONS ENGAGING THE PINS OF ALL OF SAID BLADE SHANKS AND ARRANGED TO CHANGE THE PITCH OF ALL THE BLADES IN UNISON, NUTS ON SAID FIRST PLURALITY OF BOLTS FOR CLAMPING SAID BODY AND SADDLE PLATES AGAINST SAID BLADE SHANKS, AND NUTS ON SAID SECOND PLURALITY OF BOLTS TO CLAMP ALL OF SAID PLATES TOGETHER AND PREVENT ROTATION OF SAID PITCH PLATE RELATIVE TO SAID BODY AND SADDLE PLATES.
References Cited (Backward Citations)
US458197A
Cited
US546630A
Cited
US2924040A
Cited
US1455153A
Cited
US2350383A
Cited
US2612961A
Cited
US2517714A
Cited
US2909229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |