Patent US3949858A successfully refreshed from Google Patents.
US3949858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handrail for passenger conveyors and the like
Assignee: Industrie Pirelli SpA
•
Filing: 1974-05-02
•
Granted: 1976-04-13
•
Expires: 1994-05-02
Abstract
Abstract A handrail constituted by a structural shape, C-shaped in cross section, made of elastomeric material and embedding a tension-resistant structure formed by an inextensible cord, which confers inextensibility to the handrail only at the line defined by the intersection between the neutral plane and the plane of symmetry of the handrail.
Inventors
- 👤 Giovanni Ballocci
- 👤 Aurelio Brollo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:48
CPC Classifications
B; B32; B32B; B32B1/00; B32B27/00; B32B27/12; B66; B66B; B66B23/00; B66B23/22; B66B23/24; B32B2262/00; B32B2262/02; B32B2262/0261
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
An elastomeric handrail for a passenger conveyor, C-shaped in cross-section, comprising a substantially inextensible cord embedded therein and extending longitudinally through the handrail along the point of intersection of the neutral plane and plane of symmetry thereof and at least one cord substantially parallel to the inextensible cord disposed on each side thereof, the said cords on each side of the inextensible cord being relatively extensible, and a fabric embedded in the inner surface of the handrail at a level where its outer surface is on substantially the same level as said surface, said fabric being opposite the cords and extending at least just beyond the said relatively extensible cords which are farthest removed on each side from the said extensible cords.
Claim 2
Dependent Claim
122 words
An elastomeric handrail for a passenger conveyor, C-shaped in cross-section, comprising a substantially inextensible cord embedded therein and extending longitudinally through the handrail along the point of intersection of the neutral plane and plane of symmetry thereof and at least one cord substantially parallel to the inextensible cord disposed on each side thereof, the said cords on each side of the inextensible cord being relatively extensible, and a fabric embedded in the inner surface of the handrail at a level where its outer surface is on substantially the same level as said surface, said fabric being opposite the cords and extending at least just beyond the said relatively extensible cords which are farthest removed on each side from the said extensible cords.
Claim 3
Dependent Claim
16 words
The handrail of claim 1 wherein the fabric covers the entire inner surface of the handrail.
Claim 4
Dependent Claim
24 words
The handrail of claim 1 wherein the width of the band of fabric is at least 2.4 times the diameter of the inextensible cord.
References Cited (Backward Citations)
US1101209A
Cited
US2140034A
Cited
US2669339A
Cited
US3048256A
Cited
US3029589A
Cited
US3049213A
Cited
US3321060A
Cited
US3463290A
Cited
US3776293A
Cited
US3633725A
Cited
US3623590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |