Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| D645046 | Joystick with indents | 09/13/2011 |
| 7975760 | Tool wrench assembly A tool wrench assembly for a blasthole drill includes a fork pivotally fixed relative to at least one actuator that moves the fork between an engaged and a disengaged position. ... | 07/12/2011 |
| D640258 | Joystick | 06/21/2011 |
| D639809 | Joystick with indents | 06/14/2011 |
| D614674 | Excavator cab | 04/27/2010 |
| 7174826 | Hydraulic crowd control mechanism for a mining shovel A crowd control mechanism for a power shovel includes an extendible dipper handle having an extended position and a retracted position. A double acting hydraulic cylinder having a an extendible ram has one of the cylinder and the ram fixed to the dipper handle and t... | 02/13/2007 |
| 7096610 | Dipper assembly including a closure mechanism A dipper assembly includes a dipper, a dipper door, ands a closure mechanism. The dipper door is pivotally linked relative to the dipper, and has a closed position in which the dipper door closes the open bottom. The closure mechanism has a lock position and an unlo... | 08/29/2006 |
| 7024805 | Dragline excavating machine with direct drive hoist and drag drums A dragline excavating machine includes a gearless direct drive AC drive motor for driving each of the hoist and the drag drums in the system. The gearless AC motor is driven using a digital system which receives AC power from the utility system rectifies the power u... | 04/11/2006 |
| 6752282 | Swing drive assembly A swing drive assembly for use with a mining shovel having a frame rotatable relative to a base, wherein the swing drive assembly is fixed to the frame and engages a ring gear fixed to the base to rotatably drive the mining shovel frame relative to the mining shovel... | 06/22/2004 |
