US3719265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor handrails
Assignee: Dunlop Holdings Ltd
•
Filing: 1971-05-12
•
Granted: 1973-03-06
•
Expires: 1991-05-12
Abstract
Abstract A passenger conveyor comprising a C-shaped handrail, which is flexible, contains an embedded longitudinally extending reinforcement and includes a strip of magnetized material; drive means for the handrail; and support means, wherein the drive means has a magnetized rim to attract the handrail and the support means has a magnetized upper edge to repel and support at least part of the weight of the handrail.
Inventors
- 👤 R Redding
- 👤 D Thirlby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:25
CPC Classifications
B; B66; B66B; B66B23/00; B66B23/02; B66B23/04; B29; B29C; B29C48/00; B29C48/15; B29C48/154; B29C70/00; B29C70/04; B29C48/03; B29C48/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A passenger conveyor comprising: a flexible handrail, having a length of flexible polymeric material and a localized longitudinally extending magnetized strip of reinforcement material embedded within the length of polymeric material; drive means for the handrail, comprising a drive wheel having a magnetized rim portion of opposite polarity to said magnetized reinforcement material so that the handrail is attracted toward the drive pulley by magnetic attraction; a magnetized release shoe of opposite polarity to said magnetized reinforcement adjacent to the rim portion of the drive pulley immeDiately adjacent to the point at which the handrail ceases contact with said pulley, the release shoe acting to repel the handrail and consequently assist the release of the handrail from the drive pulley; support means for the belt comprising a rigid support member having a top edge extending adjacent to the handrail and a strip of magnetized material of the same polarity as said magnetized reinforcement material along the said edge whereby the handrail is at least partially supported upon the support member by magnetic repulsion.
Claim 2
Dependent Claim
173 words
A passenger conveyor comprising: a flexible handrail, having a length of flexible polymeric material and a localized longitudinally extending magnetized strip of reinforcement material embedded within the length of polymeric material; drive means for the handrail, comprising a drive wheel having a magnetized rim portion of opposite polarity to said magnetized reinforcement material so that the handrail is attracted toward the drive pulley by magnetic attraction; a magnetized release shoe of opposite polarity to said magnetized reinforcement adjacent to the rim portion of the drive pulley immeDiately adjacent to the point at which the handrail ceases contact with said pulley, the release shoe acting to repel the handrail and consequently assist the release of the handrail from the drive pulley; support means for the belt comprising a rigid support member having a top edge extending adjacent to the handrail and a strip of magnetized material of the same polarity as said magnetized reinforcement material along the said edge whereby the handrail is at least partially supported upon the support member by magnetic repulsion.
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |