Patent US4778046A successfully refreshed from Google Patents.
US4778046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt conveyor
Assignee: Bridgestone Corp
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Filing: 1987-12-01
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Granted: 1988-10-18
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Expires: 2007-12-01
Abstract
Abstract A transporting belt is partially held by a holding belt. The holding belt is rolled up into a tubular shape through which both of the forward and return paths of the transporting belt passes. Both of the belts are supported by a plurality of shape-maintaining frames each of which comprises a plurality of shape-maintaining rollers arranged like a circle. The holding belt is provided at a horizontal or vertical curved portion so that the transporting belt may travel smoothly and may not be exposed to the weather.
Inventors
- 👤 Kunio Hashimoto
- 👤 Haruo Okazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:50
CPC Classifications
B; B65; B65G; B65G15/00; B65G15/08; B65G15/60; B65G2201/00; B65G2201/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
A belt conveyor which comprises: an endless transporting belt; an endless holding belt wider than said transporting belt, the holding belt being rolled up into a tubular shape which contains the part of the transporting belt; a plurality of shape-maintaining frames provided with spaces along the length of both the belts; and a plurality of shape-maintaining rollers arranged within said shape-maintaining frame like a circle to keep the holding belt in the tubular shape which holds both of the forward and return paths of the transporting belt.
Claim 2
Dependent Claim
87 words
A belt conveyor which comprises: an endless transporting belt; an endless holding belt wider than said transporting belt, the holding belt being rolled up into a tubular shape which contains the part of the transporting belt; a plurality of shape-maintaining frames provided with spaces along the length of both the belts; and a plurality of shape-maintaining rollers arranged within said shape-maintaining frame like a circle to keep the holding belt in the tubular shape which holds both of the forward and return paths of the transporting belt.
Claim 3
Dependent Claim
35 words
A belt conveyor as defined in claim 1 wherein the belt conveyor comprises a front and a rear roller around which the flattened holding belt is wound to circulate between the front and rear rollers.
Claim 4
Dependent Claim
53 words
A belt conveyor as defined in claim 1 wherein the belt conveyor comprises one or more rolling-up frames disposed in the vicinity of the end of the holding belt, and a plurality of rolling-up rollers arranged within the rolling-up frame like a circle to roll up the holding belt into a tubular shape.
Claim 5
Dependent Claim
41 words
A belt conveyor as defined in any of claims 1 to 3 wherein the holding belt is rolled up by overlapping the inner surface of one side end on the outer surface of the other side end along its entire length.
Claim 6
Dependent Claim
39 words
A belt conveyor as defined in any of claims 1 to 3 wherein the holding belt is rolled up by contacting the inner surfaces of the side ends with each other to form a projection along its entire length.
Claim 7
Dependent Claim
38 words
A belt conveyor as defined in any of claims 1 to 3 wherein the holding belt is supported by a plurality of support rollers which are connected by an upper and a lower link separately on a support.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |