US3744431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor systems
Assignee: Dunlop Holdings Ltd
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Filing: 1971-07-06
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Granted: 1973-07-10
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Expires: 1991-07-06
Abstract
Abstract A Conveyor system for passengers or goods having low-speed, high-speed and intermediate variable speed sections. The Conveyor utilizes platforms which are driven in the high-speed section by means of a moving cable beneath the platforms, the latter having connectors for snap-on and-off engagement to drive or release the platforms in the high-speed section, of which the following is a specification.
Inventors
- 👤 A Cumberbirch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:38
CPC Classifications
B; B66; B66B; B66B23/00; B66B23/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
126 words
A platform conveyor comprising a slow-speed zone, a highspeed zone and an intermediate variable-speed zone wherein the platforms are driven in the high-speed zone by means of a moving cable running adjacent to the platforms, the cable being driven in the direction of movement of the platforms and engaged by projecting means provided on each of the said platforms, the projecting means comprising a fixed member provided with a slot for engaging the cable, the slot having a cable entry region and a holding region of a diameter slightly less than the cable diameter wherein shoulders are provided between the two said regions spaced-apart by a distance less than the cable diameter so that the cable may be retained in the holding region of the slot.
Claim 2
Dependent Claim
126 words
A platform conveyor comprising a slow-speed zone, a highspeed zone and an intermediate variable-speed zone wherein the platforms are driven in the high-speed zone by means of a moving cable running adjacent to the platforms, the cable being driven in the direction of movement of the platforms and engaged by projecting means provided on each of the said platforms, the projecting means comprising a fixed member provided with a slot for engaging the cable, the slot having a cable entry region and a holding region of a diameter slightly less than the cable diameter wherein shoulders are provided between the two said regions spaced-apart by a distance less than the cable diameter so that the cable may be retained in the holding region of the slot.
Claim 3
Dependent Claim
29 words
A conveyor according to claim 1 wherein two moving cables are provided and each platform comprises two spaced-apart projecting Means one for engagement with each of the moving cables.
Claim 4
Dependent Claim
31 words
A conveyor according to claim 2 wherein the speed of one moving cable may be varied relative to the speed of the other cable to compensate for drive system speed irregularity.
Claim 5
Dependent Claim
53 words
A conveyor according to claim 1 wherein a cable-lifting device, mounted under the platforms, comprises at least one paddle arm projecting from a shaft and driven by the shaft whereby an arm contacts the cable between the projecting means of adjacent platforms to force the cable into the slot of the fixed member.
Claim 6
Dependent Claim
84 words
A conveyor according to claim 1 wherein a cable disengaging device comprises a paddle arm projecting from a shaft and driven by the shaft and a pulley wheel positioned below the cable path in the high-speed zone whereby the arm contacts the cable and maintains it in engagement with platforms to the one side of the arm and the pulley pulls the cable down to the other side of the arm such that it is pulled out of the holding portion of the slot.
Claim 7
Dependent Claim
55 words
A conveyor according to claim 1 wherein the platforms are driven in the low-speed and variable-speed zones by scroll means engaging projecting pins at the sides of each platform and the cable for drive in the high-speed zone is engaged in the projecting means while the platforms are in spaced-apart relationship defined by the scrolls.
Claim 8
Dependent Claim
56 words
A conveyor according to claim 1 wherein the platforms travel along two substantially adjacent paths each on substantially the same horizontal level and end stations are provided wherein the platforms are turned through 180* by capstans which take each platform in turn from the low-speed end zone and feed it into the return low-speed end zone.
Claim 9
Dependent Claim
33 words
A transport system comprising a conveyor according to claim 1 wherein high-speed zones are provided between adjacent buildings and each building at which loading or unloading is required has provided a low-speed zone.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |