US3752299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor trough for scraper-chain conveyors
Assignee: Kloeckner Werke AG
•
Filing: 1972-03-06
•
Granted: 1973-08-14
•
Expires: 1992-03-06
Abstract
Abstract The trough has transversely spaced mirror-symmetrical sidewalls of substantially sigma-shaped cross-section connected by a transverse wall extending between them substantially midway of their height. The sidewalls each have an outer side provided with a longitudinally extending first groove of substantially trapezoidal cross-section and having a transverse depth smaller than the height of its open side, with the latter height being greater than one third of the height of the respective side wall. Each sidewall each has an inner side provided with a pair of inwardly open longitudinally extending grooves which are located above and below the transverse wall, respectively, and which are each bounded in part by one side wall portion extending from an upper or lower ridge towards the transverse wall and having an inwardly directed semi-circularly curved face of a large first radius, and in part by an inwardly inclined second side wall portion extending from the first sidewall portion to the transverse wall and in addition bounding one side of the outer groove, with the second sidewall portion having a wing-shaped curvature over at least part of its length intermediate the first side wall portion and the transverse wall in outward direction and on a second radius which is substantially larger than the first radius.
Inventors
- 👤 G Blumenthal
- 👤 R Krohm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:21
CPC Classifications
B; B65; B65G; B65G19/00; B65G19/18; B65G19/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
297 words
A conveyor trough for scraper-chain conveyors, comprising a pair of transversely spaced mirror-symmetrical sidewalls of substantially signa-shaped cross-section and each having upper and lower edges spaced by a predetermined height, each of said sidewalls comprising a vertical intermediate portion, two thin sidewall portions divering from said intermediate portion and bounding an outwardly directed first groove, two thick sidewall portions each having a juncture with and extending from one of said thin sidewall portions in a direction parallel to but at a location outwardly spaced from said intermediate portion, a pair of flanges each extending inwardly from one of said thick sidewall portions normal to and spaced from said intermediate portion, said thin and thick sidewall portions and said flanges bounding two inwardly directed part-cylindrical second grooves located above and below said intermediate portion, respectively, said thin sidewall portions including between themselves in the region of said juncture an angle of between substantially 80* and 82*, the maximum height of said first groove substantially equalling four-tenths of said predetermined height, the height of said intermediate portion being equal to substantially threetenths of said maximum height, the depth of said first groove equalling substantially five-tenths of said maximum height, the length of said flanges being substantially three-tenths of said predetermined height, an angle included between respective upper and lower edges of said flanges being substantially 20* so that the thickness of corner regions defined where said flanges extend from said thick sidewall portions is equal to substantially double the minimum thickness of said thick sidewall portions, and the radius of curvature of said second grooves in said corner regions being between substantially four-tenths and five-tenths of the length of the respective flanges; and a transverse wall extending between and faSt with said sidewalls substantially midway of said predetermined height.
Claim 2
Dependent Claim
297 words
A conveyor trough for scraper-chain conveyors, comprising a pair of transversely spaced mirror-symmetrical sidewalls of substantially signa-shaped cross-section and each having upper and lower edges spaced by a predetermined height, each of said sidewalls comprising a vertical intermediate portion, two thin sidewall portions divering from said intermediate portion and bounding an outwardly directed first groove, two thick sidewall portions each having a juncture with and extending from one of said thin sidewall portions in a direction parallel to but at a location outwardly spaced from said intermediate portion, a pair of flanges each extending inwardly from one of said thick sidewall portions normal to and spaced from said intermediate portion, said thin and thick sidewall portions and said flanges bounding two inwardly directed part-cylindrical second grooves located above and below said intermediate portion, respectively, said thin sidewall portions including between themselves in the region of said juncture an angle of between substantially 80* and 82*, the maximum height of said first groove substantially equalling four-tenths of said predetermined height, the height of said intermediate portion being equal to substantially threetenths of said maximum height, the depth of said first groove equalling substantially five-tenths of said maximum height, the length of said flanges being substantially three-tenths of said predetermined height, an angle included between respective upper and lower edges of said flanges being substantially 20* so that the thickness of corner regions defined where said flanges extend from said thick sidewall portions is equal to substantially double the minimum thickness of said thick sidewall portions, and the radius of curvature of said second grooves in said corner regions being between substantially four-tenths and five-tenths of the length of the respective flanges; and a transverse wall extending between and faSt with said sidewalls substantially midway of said predetermined height.
Claim 3
Dependent Claim
20 words
A conveyor trough for scraper-chain conveyors as defined in claim 1, wherein at least said sidewalls are made of metal.
Claim 4
Dependent Claim
35 words
A conveyor trough for scraper-chain conveyors as defined in claim 1, said outwardly directed groove comprising longitudinal end regions and a middle region; and further comprising inserts secured in at least one of said regions.
Claim 5
Dependent Claim
26 words
A conveyor trough for scraper-chain conveyors as defined in claim 3, wherein said inserts are provided with longitudinal openings in which coupling members may be received.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |