Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7419064 | Working machine At an inner circumference side of a lower ring and an upper ring, flange pars are formed respectively, and a ring-shaped clamp device is arranged at the inner circumference side, and separated at four points, into a front side, back side, left side, and right side, ... | 09/02/2008 |
| 7413092 | Construction machine A construction machine includes a vertical separating/connecting device interposed between a lower traveling body and a swing bearing that supports an upper rotating body. The device includes an externally toothed ring member fixed to the swing bearing with a first ... | 08/19/2008 |
| 7370767 | Mobile crane The embodied mobile cranes have a travelling base structure that allows for travel of the crane over a surface. The cranes have a revolving superstructure mounted on the base structure and a boom and a backmast. The boom and backmast are each hinged about an associa... | 05/13/2008 |
| 7338081 | Truck frame for a construction machine A left fore leg (31) is formed to shape by a casting means, integrating an inner joint portion (31A), an outer joint portion (31B) and an intermediate tubular portion (31C) into an unitary tubular structure. In this case, a joining end ( | 03/04/2008 |
| 7111744 | Crane mount assembly for utility truck A crane mount assembly having a mounting base and tower, the base having a pair of longitudinal members in parallel spaced alignment with transverse members positioned therebetween, and a top and bottom plate secured between the longitudinal members and the transver... | 09/26/2006 |
| 6523708 | Mobile crane with a releasable coupling connecting the substructure to the superstructure A rotatably mounted ring having external teeth which mesh with a drive pinion of a fixedly mounted slewing gear, has distributed over the circumference, alternately portions of the same length with recesses and portions of the same length with radially di... | 02/25/2003 |
| 6032809 | Apparatus for reducing the axle load of a multiaxle movable telescopic crane An apparatus for reducing the axle load of a multiaxle movable crane which includes a truck; a superstructure rotatably mounted on the truck; a main jib including a basic jib and at least one telescopic section, the basic jib having a plurality of rollers... | 03/07/2000 |
| 5664692 | Mobile crane having a releasable coupling connecting the lower carriage with the upper carriage A mobile crane includes a releasable coupling for connecting the upper and lower carriages together in a simple and rapid manner through a holding ring connected with the lower carriage and an axial cylindrical ring extension of an externally toothed ring... | 09/09/1997 |
| 5120186 | Crane attachment for loading machines A self-contained, full-function, crane attachment for loading machines that is capable of quick release coupling with the standard bucket attachment mechanism of conventional loaders. The attachment comprises a wheel-mounted supporting frame equipped with... | 06/09/1992 |
| 5082127 | Collapsible lift trolley The invention relates to a collapsible lift trolley capable of occupying a compact collapsed position and a deployed in-use position. In accordance with the invention, the collapsible lift trolley comprises a base unit having a turnable wheel, two longitu... | 01/21/1992 |
| 4700851 | Lightweight, self-powered, transportable crane assembly A lightweight, self-powered, transportable crane assembly is disclosed which includes a frame that can be selectively coupled to and uncoupled from the bed of a transport vehicle or carrier, such as a pick-up truck or trailer. The frame assembly also incl... | 10/20/1987 |
| 4363591 | Towing attachment for vehicles A vehicle towing and lifting attachment mounted on a vehicle by clamps has a belt and bar support system for the vehicle being towed, a hydraulic piston and cylinder actuated arm engaging the support system and a locking means for the hydraulic piston and... | 12/14/1982 |
| 4361242 | Supporting chassis for a working machine such as a mechanical shovel The invention relates to the chassis of a public works machine, constituted by a central frame joined with two side-members. After assembly with the two side-members, the central frame constitutes a girder comprising a lower plate, an upper plate, two cross-pl... | 11/30/1982 |
| 4337867 | Curane boom pivot structure The pivot shaft for the boom of a large mobile construction crane is located near the upper side of the boom base section and its opposite ends are journaled in heavy bearings mounted on vertical side supports rising from a boom turntable. To lock the boo... | 07/06/1982 |
| 4273244 | Crane upperstructure self-transferring system A crane has an upperstructure that is mounted on a carrier by a quick-disconnect turntable mounting. The upperstructure can be transferred from the carrier to a transport, and back to the carrier, by a system that does not require an auxiliary crane. A li... | 06/16/1981 |
| 4266679 | Convertible boom machine having modular bottom portion The upper works of a boom machine such as a crane is supported for rotation about a vertical axis on a lower portion of modular construction. The lower portion comprises a hub-like member having four leg module holders which are equidistant from said axis... | 05/12/1981 |
| 4248488 | Quick disconnect bearing mount for construction machinery A material handling apparatus includes a base, an upper structure and a bearing for supporting the upper structure on the base for rotation about an axis. The bearing transmits radial, axial and moment forces from the upper structure to the base and has a... | 02/03/1981 |
| 4222186 | Adaptable combination of vehicle and attachments An improved method and combination facilitating interchanging attachments on an adaptable off-road vehicle characterized by, in addition to the usual vehicle and its controls, prime mover, power source, drive apparatus, steering apparatus and the like, a ... | 09/16/1980 |
| 4091935 | Crane with a pivotal assembly for detachably connecting and supporting a boom thereon To facilitate transferring a massive boom assembly from a regular crane carrier vehicle to an independent transport trailer, retractable pivot pins and power means to actuate the same are provided on the boom support frame of the crane turntable. The pivo... | 05/30/1978 |
| 4069922 | Portable crane with hoist mounting and outrigger support apparatus An apparatus for supporting a hoist mounted on a frame of a pick up truck is illustrated wherein an auxiliary or supplemental support leg is provided outboard of the vehicle for supporting the hoist mechanism. The auxiliary support is provided by position... | 01/24/1978 |
| 3941252 | Crane with removable superstructure Methods and apparatus are disclosed for releasably connecting a crane superstructure and a crane carrier. The apparatus includes a segmented clamp assembly which hydraulically engages mating flanges carried by the superstructure and the carrier respective... | 03/02/1976 |
