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 |
| 7661492 | Motorized wheeled vehicle having a multi-stage speed reduction function when turning A motorized wheeled vehicle includes a support frame, a head tube secured on the support frame, a front fork pivotally mounted on the head tube, a front wheel rotatably mounted on the front fork, a steering tube pivotally mounted on the head tube and secured on the ... | 02/16/2010 |
| 7287775 | Adjustable ski skin attachment device The present invention relates to an adjustable ski skin attachment device that can be used to efficiently attach a skin to a ski or snowboard. In accordance with the present invention, an adjustable ski skin attachment device includes two threaded members, a coupler... | 10/30/2007 |
| 7172041 | Drive-by-wire lawnmower The mower has at least two independently driven wheels that are each capable of bi-directional rotation. The at least two wheels are independently driven so that operation of the at least two wheels causes the at least two wheels to independently rotate which propel... | 02/06/2007 |
| 6414458 | Apparatus for robotically inspecting gas turbine combustion components A robotic inspection system for gas turbine combustion components includes an exterior manipulator for visual inspection of the exterior surface of the impingement sleeve, an interior manipulator for visual inspection of the interior of the transition pie... | 07/02/2002 |
| 6009643 | Hydraulic working machine A hydraulic excavator includes a cab disposed on a front portion of a revolving upper structure. An internal combustion engine is mounted in a rear portion of the revolving upper structure, and an directional control valve is disposed in the front portion... | 01/04/2000 |
| 5836411 | Hydraulic working machine A hydraulic excavator includes a cab disposed on a front portion of a revolving upper structure. An internal combustion engine is mounted in a rear portion of the revolving upper structure, and a directional control valve is disposed in the front portion ... | 11/17/1998 |
| 5350033 | Robotic inspection vehicle A remotely controllable robotic inspection vehicle includes a fixed housing which can accommodate a number of modular inspection and/or robotic arm components. The base unit includes two drive and two free castering wheels arranged in an independently art... | 09/27/1994 |
| 5333452 | Shaft drive hydraulic system and isolated hydraulic system The present invention provides for two separate hydraulic systems ran from a single diesel engine wherein one of the hydraulic systems is in the raised platform and the second hydraulic system is on the lower platform rotatable relative to the raised plat... | 08/02/1994 |
| 5282363 | Hydraulic circuit for running a crawler vehicle A hydraulic circuit for running a crawler vehicle which comprises a running frame portion provided with motors for running the crawler vehicle and an upper swivel portion turnably disposed on the running frame portion via a swivel joint. Electro-magnetic ... | 02/01/1994 |
| 4729445 | Caterpillar chassis for heavy vehicles The caterpillar chassis (1) for heavy vehicles, such as bucket-wheel excavators or wheeled loaders, has four caterpillars (2, 9) being arranged such that they spread out a supporting triangle (4). The front caterpillars (9), which are located at a smaller... | 03/08/1988 |
| 4467604 | Hydrostatic drive system for an excavator A hydrostatic drive system for an excavator is provided having a primary energy source on the excavator, at least one pump installed in a housing for supplying several consumers, a connection between each pump and consumer effected through at least one co... | 08/28/1984 |
| 4415050 | Drive pump arrangement for working vehicle A working vehicle comprising two pumps for driving hydraulic motors provided for opposite running devices individually and a valve mechanism for bringing the vehicle into a low-speed state wherein a fluid is supplied from the pumps to the motors individua... | 11/15/1983 |
| 4394886 | Steering gear with steering-arm lever A steering gear with pitmans arm, steering tie rod and steering gear connecting rod for a vehicle with optionally hydraulically boosted, mechanical steering or purely hydraulic steering, and a hydraulic pump, driven by the drive engine, being connected vi... | 07/26/1983 |
| 4392698 | Industrial crane with rotary electrical connector A vehicle having a chassis and a rotatable upper works is provided with a cylindrical electrical connector mounted remote from the axis of rotation of the upper works, to provide adequate ground clearance.... | 07/12/1983 |
| 4344497 | Override control for axle locking apparatus of mobile crane A pair of hydraulic locking cylinders for a vertically oscillatable wheel axle on the carrier frame of a mobile crane are interconnected and controlled by a hydraulic double-locking valve which is responsive to the centered or off-centered rotary position... | 08/17/1982 |
| 4329796 | Multi-use excavating and load handling machine This machine comprises a chassis which bears at one end a motor unit for driving large size drive wheels whereby said chassis rests on the ground at this end. At its other end, the chassis is provided with retractable supports by which it may rest on the ... | 05/18/1982 |
| 4249625 | Drive system for crawler propelled machines A drive system for crawler propelled earth working machinery is described. A first clutch which is movable between a drive position for transmitting drive from a drive source to a first drive sprocket and a lock position for locking the first drive sprock... | 02/10/1981 |
| 4177869 | Swivel joint for a vehicle The invention concerns a vehicle of the type comprising a mobile carrier, a pedestal mounted thereon for rotation about a vertical axis, and a swivel joint connected between the pedestal and the carrier and through which energy is transmitted. The swivel ... | 12/11/1979 |
| 4161227 | Transmission gear for a vehicle of the type having a swivelling upper structure with respect to an undercarriage A transmission gear for a vehicle of the type having a swivelling upper structure with respect to an undercarriage which comprises an input gear rotatably mounted on the upper structure, the input gear being connected to a prime mover, an output gear rota... | 07/17/1979 |
| 3990527 | Steering apparatus for a vehicle of the type having revolving upper body with respect to a lower body thereof A steering apparatus for a vehicle of the type having a revolving upper body with respect to a lower body thereof in which a directional control valve is provided in a hydraulic circuit to maintain the same steering control when upper body of the vehicle ... | 11/09/1976 |
| 3972378 | Swing lock means for an hydraulic excavator An excavator comprises an upper unit rotatably mounted on a tracked undercarriage. A swing gear mechanism is operatively connected between the upper unit and the undercarriage to selectively rotate the upper unit. An operator-controlled locking mechanism ... | 08/03/1976 |
