Elevator system
Abstract
Abstract 1. AN ELEVATOR SYSTEM, COMPRISING: AN ELEVATOR CAR, COUNTERWEIGHT MEANS, A DRIVE SHEAVE HAVING CABLE GROOVES, ROPE MEANS INTERCONNECTING SAID ELEVATOR CAR AND COUNTERWEIGHT MEANS, SAID ROPE MEANS BEING HELD IN FRICTIONAL CONTACT WITH THE CABLE GROOVES OF SAID DRIVE SHEAVE BY THE WEIGHT OF SAID ELEVATOR CAR AND COUNTERWEIGHT MEANS, DRIVE MEANS FOR ROTATING SAID DRIVE SHEAVE TO MOVE SAID ELEVATOR CAR AND COUNTERWEIGHT MEANS, DUE TO FRICTION BETWEEN THE DRIVE SHEAVE AND ROPE MEANS, AND LUBRICATING MEANS, SAID LUBRICATING MEANS LUBRICATING SAID ROPE MEANS AND THE CABLE GROOVES OF SAID DRIVE SHEAVE DURING OPERATION OF THE ELEVATOR SYSTEM WITH A SYNTHETIC LUBRICANT WHICH PROVIDES A COEFFICIENT OF FRICTION BETWEEN SAID ROPE MEANS AND SAID DRIVE SHEAVE OF AT LEAST 0.145.
Inventors
- 👤 H Berkovitz
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |