Patent US3633725A successfully refreshed from Google Patents.
US3633725A
Expired / Lapsed
US
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Handrails for escalators and travolators
Assignee: BTR Industries Ltd
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Filing: 1969-06-23
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Granted: 1972-01-11
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Expires: 1989-06-23
Abstract
Abstract A handrail for an escalator or travolator and comprising a strip of generally C-shaped cross section. A lengthwise succession of transverse slots through the arms of the C-shaped cross section facilitate bending of the strip about its transverse axis.
Inventors
- 👤 Edward Peter Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:46
CPC Classifications
B; B66; B66B; B66B23/00; B66B23/22; B66B23/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
A handrail comprising a core of semirigid material of generally C-shaped cross section and having along its length a succession of transverse slots formed through the arms of the Cshape in combination with an outer cover of flexible resilient material which extends around the outside of the core and has means to engage the tongues provided by the remaining portions of the arms of the C-shape section after the slots have been cut.
Claim 2
Dependent Claim
73 words
A handrail comprising a core of semirigid material of generally C-shaped cross section and having along its length a succession of transverse slots formed through the arms of the Cshape in combination with an outer cover of flexible resilient material which extends around the outside of the core and has means to engage the tongues provided by the remaining portions of the arms of the C-shape section after the slots have been cut.
Claim 3
Dependent Claim
45 words
A handrail as claimed in claim 1 wherein one or more flexible reinforcing elements extend longitudinally within the unslotted portion of the handrail, which elements are formed from a material the tensile strength of which is high in relation to that of said semirigid material.
Claim 4
Dependent Claim
24 words
A handrail as claimed in claim 1 wherein the slots which extend through the opposed arms of the handrail are aligned with each other.
Claim 5
Dependent Claim
38 words
A handrail as claimed in claim 1 wherein there is a succession of teeth upstanding from the inside surface of the base of the strip, which teeth are capable of engagement by a positive drive for the handrail.
Claim 6
Dependent Claim
19 words
A handrail as claimed in claim 4 wherein the gaps between the teeth are aligned with the slots aforesaid.
Claim 7
Dependent Claim
17 words
A handrail as claimed in claim 1 wherein the engaging means are pockets in the outer cover.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |