Patent US3620346A successfully refreshed from Google Patents.
US3620346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyors
Assignee: Dunlop Holdings Ltd
•
Filing: 1969-12-03
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Granted: 1971-11-16
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Expires: 1989-12-03
Abstract
Abstract The handrail for a passenger conveyor is formed of a flexible material having a layer of magnetized material on one surface. The magnetized layer cooperates with a support having means for providing a magnetic field, such as a further layer of magnetized material, which field repels the handrail, of which the following is a specification.
Inventors
- 👤 Thomas A Brooke
- 👤 William C Neller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:55
CPC Classifications
B; B65; B65G; B65G15/00; B65G15/60; B65G21/00; B65G21/02; B66; B66B; B66B23/00; B66B23/08; B66B23/10; B66B23/22; B66B23/24; B65G2201/00; B65G2201/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
A passenger-carrying conveyor comprising: a movable passenger-carrying platform; a handrail movable with the said platform; support means for the said handrail; drive means for the handrail, said handrail support means comprising a rigid support member extending upwardly adjacent the side of the platform and a layer of magnetized material extending along the top surface of the support member; the handrail comprising a flexible polymeric material having a tensile member embedded therein, and a layer of magnetized material dispersed therein, such that the magnetized layers in the handrail and support means repel each other and support the handrail above the support means.
Claim 2
Dependent Claim
101 words
A passenger-carrying conveyor comprising: a movable passenger-carrying platform; a handrail movable with the said platform; support means for the said handrail; drive means for the handrail, said handrail support means comprising a rigid support member extending upwardly adjacent the side of the platform and a layer of magnetized material extending along the top surface of the support member; the handrail comprising a flexible polymeric material having a tensile member embedded therein, and a layer of magnetized material dispersed therein, such that the magnetized layers in the handrail and support means repel each other and support the handrail above the support means.
Claim 3
Dependent Claim
25 words
A passenger-carrying conveyor as claimed in claim 1, wherein both the layers containing magnetized material comprise a flexible polymeric material having magnetized material dispersed therein.
Claim 4
Dependent Claim
82 words
A passenger-carrying conveyor as claimed in claim 2, the support member comprising a main body portion and a crosspiece extending across the top of the main body portion, the ends of the crosspiece extending either side of the main body portion; the handrail of a cross section, viewed transverse to the longitudinal axis of the handrail, having a substantially straight center portion and curved end portion, the curved end portion curving round and down and extending beneath the ends of the crosspiece.
Claim 5
Dependent Claim
59 words
A passenger-carrying conveyor as claimed in claim 3, including a layer of magnetized material on each end of the crosspiece of the support, and wherein the flexible polymeric layer of the handrail extends for the inner surfaces of the curved end pieces of the handrail cross section, whereby sideways movement of the handrail, relative to the support, is opposed.
References Cited (Backward Citations)
US3169632A
Cited
US3463290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |