# US 8,783,445 B2 · Upper-strand well for a trough pan and trough pan having such an upper-strand well > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,783,445 B2 - Document ID: US8783445B2 - Status: Granted - Kind: B2 - Application number: 13/377,222 - Filed: 2010-06-07 - Published: 2012-04-05 - Granted: 2014-07-22 - Earliest claimed: 2009-06-10 - Assignees: Caterpillar Global Mining Europe GmbH - Applicants: Jurgen Ingendahl - Inventors: Jurgen Ingendahl - Web page: https://patentgrep.com/patent/US8783445B2 ## CPC - B65G 19/285: {with detachable or replaceable parts, e.g. replaceable wear channels (B65G19/282 takes precedence)} - B65G 19/287: {Coupling means for trough sections (B65G19/282 takes precedence)} - E21F 13/066: {Scraper chain conveyors (in general B65G19/00)} - B65G: TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS (packaging B65B; handling thin or filamentary materials, e.g. paper sheets or thread, B65H; cranes B66C; portable mobile or lifting or hauling appliances, e.g. hoists, B66D; devices for lifting or lowering goods for loading or unloading purposes, e.g. fork-lift trucks, B66F9/00; emptying bottles, jars, casks, barrels or similar containers, not otherwise provided for, B67C9/00; delivering or transferring liquids B67D; filling or discharging vessels for liquefied, solidified or compressed gases F17C; pipe-line systems for fluids F17D) - E21F: SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS ## Abstract A trough pan with an upper strand trough and to an upper strand trough for a trough pan of a scraper chain conveyor, with two side profiles, and with a trough bottom. The trough bottom has two side edges and two end edges which have at least partially a wavy boundary line and which are provided at the transition of a top side into the end edge with a chamfer having a chamfer angle. In order to improve the upper strand troughs and the trough pans equipped with these in terms of the problem of the penetration of fine coal into the intermediate gap of the bearing region between the trough bottom and intermediate bottom, the end edges are provided with a bevel between the chamfer and an underside, the bevel sloping more steeply than the chamfer. ## Claims ### Claim 1 An upper strand trough for a trough pan of a scraper chain conveyor, comprising: two side profiles and a trough bottom which connects the two side profiles; two side edges and two end edges which are formed complementarily to one another, which have at least partially a wavy boundary line and which are provided at the transition of a top side into the end edge with a chamfer having a chamfer angle; wherein the end edges are provided with a bevel between the chamfer and an underside, the bevel sloping more steeply than the chamfer. ### Claim 2 (depends on 1) The upper strand trough as claimed in claim 1, wherein the bevel extends as far as the underside of the trough bottom. ### Claim 3 (depends on 1) The upper strand trough as claimed in claim 1, wherein the bevel extends only partially over the depth of the end edge, and a straight edge portion running at right angles to the underside is formed between the underside and the limiting edge of the bevel. ### Claim 4 (depends on 1) The upper strand trough as claimed in claim 1, wherein at least one of the chamfer angle is between about 25° and 50° and the bevel angle is between about 60° to 80° . ### Claim 5 (depends on 4) The upper strand trough as claimed in claim 4, wherein the chamfer angle is between about 30° or 45° . ### Claim 6 (depends on 4) The upper strand trough as claimed in claim 4, wherein the bevel angle is about 70° . ### Claim 7 (depends on 1) The upper strand trough as claimed in claim 1, wherein the bevel and the chamfer at the two opposite end edges of a trough bottom are of identical size. ### Claim 8 (depends on 1) The upper strand trough as claimed in claim 1, wherein the boundary line has a central curved zone and is provided on an outside with multiply angled zones. ### Claim 9 A trough pan for scraper chain conveyors, in particular for longwall conveyors for mining use, with an upper strand trough which includes side profiles and a trough bottom having two side edges and two end edges, the opposite end edges being formed complementarily to one another, having at least partially a wavy boundary line and being provided at the transition of a top side of the trough bottom into the end edge with a chamfer having a chamfer angle, and with a supporting structure for the upper strand trough, said supporting structure comprising interconnected side cheeks which delimit a lower strand and are connected via an intermediate bottom which forms a bearing surface for the trough bottom of the upper strand trough and has terminal edges which in the assembled state lie offset to the end edges of the trough bottom, in order to provide overlapping regions in a joint region of two adjacent trough pans, the end edges being provided with a bevel having a bevel angle between the chamfer and an underside of the trough bottom, the bevel sloping more steeply than the chamfer. ### Claim 10 (depends on 9) The trough pan as claimed in claim 9, wherein the bevel extends as far as the underside of the trough bottom. ### Claim 11 (depends on 9) The trough pan as claimed in claim 9, wherein the bevel extends only partially over the depth of the end edge, and a straight edge portion running at right angles to the underside is formed between the underside and the limiting edge of the bevel. ### Claim 12 (depends on 9) The trough pan as claimed in claim 9, wherein at least one of the chamfer angle is between about 25° and 50° and the bevel angle is between about 60° to 80° . ### Claim 13 (depends on 12) The trough pan as claimed in claim 12, wherein the chamfer angle is between about 30° or 45° . ### Claim 14 (depends on 12) The trough pan as claimed in claim 12, wherein the bevel angle is about 70° . ### Claim 15 (depends on 9) The trough pan as claimed in claim 9, wherein the bevel and the chamfer at the two opposite end edges of a trough bottom are of identical size. ### Claim 16 (depends on 9) The trough pan as claimed in claim 9, wherein the boundary line has a central curved zone and is provided at the margin with multiply angled zones. ### Claim 17 (depends on 9) The trough pan as claimed in claim 9, wherein the intermediate bottom is provided, near the terminal edges partially with at least one of clearances and holes. ### Claim 18 (depends on 17) The trough pan as claimed in claim 17, wherein the intermediate bottom is provided on one side with a flattening reaching as far as the terminal edge, the at least one of clearances and holes being formed in that portion of the intermediate bottom which adjoins the flattening. ### Claim 19 (depends on 17) The trough pan as claimed in claim 17, wherein the number of the at least one of holes and clearances is greater in the portion than near the other terminal edge of the intermediate bottom. ### Claim 20 (depends on 9) The trough pan as claimed in claim 9, wherein the intermediate bottom is provided with an inspection orifice, and in that, beneath the trough bottom, a sheet metal piece is welded on which in the assembled state fits positively into the inspection orifice.