US3572147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual direct timing belt feed roll drive
Assignee: Westvaco Corp
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Filing: 1969-07-11
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Granted: 1971-03-23
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Expires: 1989-07-11
Abstract
Abstract A VARIABLE RATIO DRIVE MECHANISM IS PRESENTED WHICH EMPLOYS THREE EXCHANGEABLE TIMING GEARS AND A FIXED TIMING GEAR DRIVEN BY TWO FIXED LENGTH TIMING BELTS. A PRESSURE ACTUATED PULLEY ASSEMBLY IS PROVIDED ON THE DRIVE END OF EACH TIMING GEAR TO ENABLE THE EXCHANGEABLE TIMING GEARS TO BE READILY REMOVED IN ORDER TO CHANGE THE DRIVE RATIO, AND, AN ADJUSTABLE PARALLEL ARMS MOUNTING MEANS IS PROVIDED FORONE OF THE EXCHANGEABLE TIMING GEARS DRIVES TO ADJUST THE TENSION IN THE TIMING BELTS WHEN DIFFERENT TIMING GEARS ARE INSTALLED.
Inventors
- 👤 David Noel Obenshain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:51
CPC Classifications
F; F16; F16H; F16H9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |