US3237470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sprocket wheel for bead chain drive
Assignee: Individual
•
Filing: 1963-11-07
•
Granted: 1966-03-01
•
Expires: 1983-11-07
Abstract
No abstract record available.
Inventors
- 👤 Harold W Birk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:20
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/30; F16H7/00; F16H7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE COMBINATION OF A SPROCKET WHEEL AND A BEAD CHAIN HAVING A PLURALITY OF BEADS CONNECTED TO ONE ANOTHER, SAID SPROCKET WHEEL COMPRISING A PAIR OF CONCENTRICALLY CONNECTED CIRCULAR DISCS OF SHEET METAL, AT LEAST ONE OF SAID DISCS HAVING A PLURALITY OF EQUALLY CIRCUMAXIALLY SPACED INDENTATIONS AROUND ITS CIRCUMAXIAL SPACING TO DEFINE WITH AN ANNULAR PORTION OF THE OTHER DISC AN ANNULAR SERIES OF BEAD SOCKETS, SAID CIRCUMAXIAL SPACING BETWEEN SAID INDENTATIONS BEING APPROXIMATELY EQUAL TO THE LINEAR PITCH OF SAID BEAD CHAIN AND EACH OF SAID INDENTATIONS INCLUDING A PARTI-SPHERICAL BEAD BEARING SURFACE, SAID PARTI-SPHERICAL SURFACES HAVING A RADIUS OF CURVATURE SOMEWHET GREATER THAN THAT OF THE SURFACE OF SAID BEADS, AND SAID PARTI-SPHERICAL SURFACES EXTENDING RADIALLY OUTWARDLY BEYOND THE CENTERS OF THE BEADS WHEN THE LATTER ARE ENTERED IN THE SOCKETS.
Claim 2
Dependent Claim
134 words
THE COMBINATION OF A SPROCKET WHEEL AND A BEAD CHAIN HAVING A PLURALITY OF BEADS CONNECTED TO ONE ANOTHER, SAID SPROCKET WHEEL COMPRISING A PAIR OF CONCENTRICALLY CONNECTED CIRCULAR DISCS OF SHEET METAL, AT LEAST ONE OF SAID DISCS HAVING A PLURALITY OF EQUALLY CIRCUMAXIALLY SPACED INDENTATIONS AROUND ITS CIRCUMAXIAL SPACING TO DEFINE WITH AN ANNULAR PORTION OF THE OTHER DISC AN ANNULAR SERIES OF BEAD SOCKETS, SAID CIRCUMAXIAL SPACING BETWEEN SAID INDENTATIONS BEING APPROXIMATELY EQUAL TO THE LINEAR PITCH OF SAID BEAD CHAIN AND EACH OF SAID INDENTATIONS INCLUDING A PARTI-SPHERICAL BEAD BEARING SURFACE, SAID PARTI-SPHERICAL SURFACES HAVING A RADIUS OF CURVATURE SOMEWHET GREATER THAN THAT OF THE SURFACE OF SAID BEADS, AND SAID PARTI-SPHERICAL SURFACES EXTENDING RADIALLY OUTWARDLY BEYOND THE CENTERS OF THE BEADS WHEN THE LATTER ARE ENTERED IN THE SOCKETS.
References Cited (Backward Citations)
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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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |