Patent application number | Description | Published |
20120260538 | SNUBBER FOR SHOVEL DIPPER - A snubber for a mining shovel including a dipper body and a dipper door rotatably coupled to the dipper body. The snubber includes a housing having an internal wall defining a fluid-filled chamber, a shaft rotatably coupled to the housing and including a portion positioned within the chamber, a paddle positioned within the chamber, a dam positioned within the chamber, a first valve, and a second valve. Rotation of the dipper door relative to the dipper body causes rotation of the shaft relative to the housing. The paddle is coupled to the shaft such that the paddle rotates with the shaft. The dam and paddle substantially partition the internal chamber into a first portion and a second portion. The first valve controls fluid flow from the first chamber to the second chamber, and the second valve controls fluid flow from the second chamber to the first chamber. | 10-18-2012 |
20120279095 | STRAIGHT TAPER DIPPER - A dipper having an inlet and an outlet, and an inlet reference plane being defined at the inlet. The dipper includes a front wall and an opposite back wall extending between the inlet and the outlet. A front wall reference plane extends from the inlet to the outlet and is positioned between the front wall and the back wall. The dipper further includes two side walls connected between the front wall and the back wall and extending between the inlet and the outlet. The inlet has an inlet area in the inlet reference plane, wherein the outlet has an outlet area in an outlet reference plane substantially parallel to the inlet reference plane. The front wall, the back wall, and the two side walls are arranged such that the outlet area is at least 3 percent and no more than 25 percent greater than the inlet area. | 11-08-2012 |
20130136570 | DIPPER BAIL - The invention provides a bail for a rope shovel having a hoist rope and a dipper. The bail includes a pair of arms coupled to the dipper; and a cross-member extending between the pair of arms and being pivotably coupled to each of the arms. The cross-member includes a mounting block for coupling the hoist rope to the bail. | 05-30-2013 |
20150033594 | LATCH SYSTEM FOR A POWER SHOVEL DIPPER DOOR - A power shovel dipper door includes a hollow dipper body defining a first end and a second end opposite the first end, a plurality of dipper teeth coupled to the first end, a dipper door pivotally mounted at the second end, and a latch system for releasably securing the dipper door in a closed position. The latch system includes a latch bar and a latch keeper. At least one of the latch bar and latch keeper is movable between a first position and a second position. The latch keeper is engaged by the latch bar when at least one of the latch bar and latch keeper is in the first position. The latch system further includes removable inserts positioned proximate an interface where the latch bar and latch keeper are capable of engaging each other. One or more of the removable inserts includes a tool steel. | 02-05-2015 |
20150089847 | DIPPER DOOR AND DIPPER DOOR TRIP ASSEMBLY - A mining machine includes a boom, a handle coupled to the boom, a dipper coupled to the handle, and a dipper door pivotally coupled to the dipper. The mining shovel also includes a dipper door trip assembly including a trip motor coupled to the boom, a trip drum coupled to the handle, a linkage assembly coupled to the dipper door, a first actuation element extending directly from the trip motor to the trip drum, and a second actuation element extending directly from the trip drum to the linkage assembly. | 04-02-2015 |
20150110592 | LINER SYSTEM FOR A DIPPER - A mining machine includes a boom, a handle coupled to the boom, and a dipper coupled to the handle. The mining machine further includes a liner system coupled to the dipper. The liner system includes a first guide member and a second guide member coupled to a surface of the dipper, wherein the first and second guide members and the surface of the dipper define a channel extending along the dipper, and wherein the liner system further includes an insert disposed at least partially within the channel that is inhibited from moving away from the surface of the dipper by a portion of the first guide member. | 04-23-2015 |
20150218774 | STRAIGHT TAPER DIPPER - A dipper having an inlet and an outlet. The dipper includes a front wall and an opposite back wall extending between the inlet and the outlet. The front wall has a substantially linear inner surface between the inlet and the outlet. The dipper further includes two side walls connected between the front wall and the back wall and extending between the inlet and the outlet. Further, the dipper has a lip coupled to the front wall and extending outwardly from the inlet in a direction away from the outlet, the lip having a lip inner surface arranged generally parallel with the substantially linear inner surface of the front wall. | 08-06-2015 |
20150308071 | MINING SHOVEL WITH BUSHINGS AT PIN LOCATIONS - A cartridge includes a body, an aperture extending through the body sized to receive a pivot pin, and a spherical bushing disposed within the body. The cartridge also includes a first internal seal disposed axially on one side of the bushing and a second internal seal disposed axially on an opposite side of the bushing. The cartridge also includes an end cap disposed at least partially within the aperture that abuts the bushing and prevents the bushing from moving axially in a first direction within the aperture. | 10-29-2015 |