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 |
| 7438305 | Agricultural tractor with movable step A tractor has a frame defined by two side rails extending longitudinally carried on ground wheels with a cab on the frame at one end and an engine compartment at the other end. The cab has doors on each side and there are provided two operator platforms each attache... | 10/21/2008 |
| 7182173 | Material-handling device for aerial work platform An improved aerial work apparatus of the type having an aerial work platform attached to the distal end of a boom mounted to a mobile chassis comprising a material-handling device mounted with respect to the platform. Preferably, the material-handling device is eith... | 02/27/2007 |
| 7055912 | Vehicle mounted utility apparatus with quick attachment means A utility apparatus including lift apparatus and dump body apparatus is provided with quick attachment means to permit ready mounting of the utility apparatus on the support frame of a vehicle. The utility apparatus includes a mounting frame having shiftable support... | 06/06/2006 |
| 7004285 | Load-sensing mechanism for aerial work apparatus An aerial work apparatus having a boom mounted to a base, a platform attached to the distal end of the boom, a boom mechanism for positioning the platform, a boom control module mounted with respect to the platform, a vertical load-sensing mechanism mounted at the p... | 02/28/2006 |
| 6955025 | Self-erecting tower and method for raising the tower A tall tower is divided into an upper section with a tower top and a lower section with a tower bottom. The sections are hinged together. The lower section is hinged to a tower base. A telescoping crane is attached to a lift point on the lower section. The crane is ... | 10/18/2005 |
| 6823964 | Fall arrest platform A fall arrest platform includes a platform cooperable with a lifting vehicle and having a floor, safety rails surrounding a perimeter of the floor, and an entrance gate in the side rails. A fall arrest system is integrated with the platform and includes a lanyard se... | 11/30/2004 |
| 6470999 | Ergonomic insert for aerial bucket An ergonomic insert is disclosed that reduces the risk of low-back injury to workers in aerial buckets. A combination of an ergonomic insert, an aerial bucket and means for stabilizing said ergonomic insert within the aerial bucket is also disclosed. Fina... | 10/29/2002 |
| 6464037 | Reconfigurable work platform for aerial work platform system, aerial work platform system using same, and method for reconfiguring a work platform A reconfigurable work platform for an aerial work platform system includes at least one outwardly tiltable portion on which an occupant of the work platform can lean so as to extend his or her lateral reach. This is useful when the work platform itself ca... | 10/15/2002 |
| 6330931 | Fall protection system and method Disclosed is a machinery operator protection system and method, which inhibits the use of machinery unless the operator of the machinery is properly secured with a lanyard and/or body harness to the machinery. The disclosed system includes a lanyard conne... | 12/18/2001 |
| 6250423 | Mobile lifting platform A mobile lifting platform with a chassis and supports for a platform. Mounted on the platform is a first live ring whose vertical axis is approximately centered on the platform. The first live ring carries a horizontal boom which is pivotally movable abou... | 06/26/2001 |
| 6170607 | Electrical hazard warning system for aerial devices A warning system for an aerial device which provides an alarm signal when a worker on an aerial work platform is exposed to an electrical hazard. The aerial device has an insulated boom which carries the work platform on its upper end. An electrostatic ch... | 01/09/2001 |
| 6170606 | Analog control A mobile machine which carries the operator of the machine is equipped with a control which has a shape, geometry and motion analogous to that of the machine and which causes machine motion analogous to the motion imparted to the control by the operator. ... | 01/09/2001 |
| 6152264 | Lift truck work platform with pivoting wings A work platform for use with a lift truck. The work platform has a pair of wing platforms that are pivotally hinged to a center platform. The work platform has a wing-extended position in which the wing platforms are extended from the center platform so a... | 11/28/2000 |
| 6145619 | Foldable personnel basket for mobile equipment A personnel basket for attachment to a boom or ladder of a rescue vehicle is provided, the basket having a pair of handrails extending along the perimeter of the personnel basket walls, the handrails are adapted to readily fold into a position that reduce... | 11/14/2000 |
| 6012544 | Aerial work platform with removably attachable support structure for auxiliary power plant The aerial work platform includes a support frame, wheels rotatably attached to the support frame, and an electric motor rotatably driving at least one of the wheels. A boom having a first end is pivotably mounted to the support frame, and a fluid motor r... | 01/11/2000 |
| 5944138 | Leveling system for aerial platforms A system for leveling a personnel carrying platform mounted on the end of an elongated vehicle mounted boom. A pendulum controlled hydraulic valve controls the application of fluid pressure to a pair of cylinders equipped on their ends with a series of li... | 08/31/1999 |
| 5913379 | Articulated aerial work platform system An articulated aerial platform system having a lift assembly including an upper parallelogram riser and a lower parallelogram riser. The upper and lower risers are raised and lowered by a single riser cylinder mounted between a base of the system and the ... | 06/22/1999 |
| 5779002 | Astronaut's work station device An astronaut's work station for performing experiments or other work in space is designed for use under the conditions of open space on board space vehicles by an astronaut in a spacesuit, using a system of hardware, for instance electron beam, which it a... | 07/14/1998 |
| 5746286 | Hydraulic boom platform leveling system A platform leveling system for an aerial lift truck utilizes a master/slave combination of helical hydraulic rotary actuators to automatically level the work platform in response to movements of the boom. For a two-stage aerial lift comprised of a lower b... | 05/05/1998 |
| 5727645 | Aerial lift including a detachable end-hung basket An aerial lift comprising a self-propelled vehicle such as a truck or the like having a rotatable pedestal mounted thereon. An elongated telescopic boom has one end pivotally secured, about a horizontal axis, to the pedestal. A first support is pivotally ... | 03/17/1998 |
| 5611410 | Aerial platform enclosure apparatus An aerial platform utility enclosure designed to be easily installed upon an unenclosed aerial platform bucket. The enclosure protects the worker from environmental elements without reducing visibility out of the bucket because a polycarbonate plastic suc... | 03/18/1997 |
| 5597050 | Retaining and support assembly for machinery lift platforms A retaining and support assembly for supporting a lift platform or cage at an elevated position on machinery, the lift platform or cage having an engagement plate which may located between a stop and retractable pin supported on the machinery so as to be ... | 01/28/1997 |
| 5427199 | Self-propelled work platform and containment enclosure A moveable, rigid enclosure having a work platform enclosed therewithin and which is sealed against a work surface. A negative pressure is applied to the interior of the enclosure. The rigid enclosure is supported by the inner work platform, and includes ... | 06/27/1995 |
| 5107955 | Operation control mechanism of lifting apparatus A lifting apparatus including a chassis having front and rear ends, and a drive unit for moving the chassis in forward or rearward directions. A turntable is mounted on the chassis for horizontal turning movement between front and rear positions. Boom ass... | 04/28/1992 |
| 5076449 | Load measurement system for boom mounted auxiliary arm A boom lift apparatus for use on a truck having a boom and a boom mounted bucket includes a mast selectively positionable on the boom at any of a plurality of different angles and supported on the boom for limited axial movement by a hydraulic cylinder wh... | 12/31/1991 |
| 4957189 | Lifting device A lifting device which includes an outer rail composed of an outer vertical section, and an outer inclined section, an outer horizontal section; an inner rail composed of an inner vertical section, an inner inclined section, and an inner horizontal sectio... | 09/18/1990 |
| 4799573 | Adjustable personnel platform An adjustable personnel platform (38) is rotatably fastened on a lift tower end, with a carrying arm (42) and a pivot link (43) in the pivot plane of the elements (15, 21, 26) of the lift tower. It is automatically held horizontal through a reversable ele... | 01/24/1989 |
| 4775029 | Collapsible tower boom lift A collapsible boom lift comprised of upper and lower telescoping boom assemblies. The upper boom is pivotally connected to an upright support member which is pivotally connected at its lower end to the lower boom. The upright support member is maintained ... | 10/04/1988 |
| 4763758 | Scuff pad with step Scuff pad with step with which resides interiorly of an aerial lift bucket, or bucket liner if provided, at the bottom thereof and which includes a base portion and an upwardly extending portion extending upwardly of the base portion of a predetermined di... | 08/16/1988 |
| 4657109 | Attachment jib for cranes An attachment jib for supporting various working devices, such as a pipe manipulator, includes a support base which can be rigidly coupled removably with existing elements on the nose block of a telescopic crane boom. The jib includes telescopic sections ... | 04/14/1987 |
| 4589518 | Revolving block for high place working vehicle A revolving block having an inclination correcting mechanism housed therein is adapted to revolvably support a working implement, such as a ladder or boom, mounted on a high place working vehicle.... | 05/20/1986 |
| 4515244 | Direction altering device The direction altering device is used in conjunction with an emergency or exit rope or friction type lowering device. The purpose of the device is to hold the exit rope in a fixed position at the point on a bucket of a bucket truck, cherrypicker, or overh... | 05/07/1985 |
| 4466506 | Wire lift device for high tension electric line For use in energized high voltage pole line maintenance work, a vertical mast carrying a temporary crossarm is adjustably attached to an adapter sleeve mounted in lieu of one of the buckets of a dual-bucket truck on the self-leveling cross shaft, so that ... | 08/21/1984 |
| 4334594 | Aerial device An articulated aerial device is provided which includes a workman's basket suspended from a movable beam. The basket is attached to the movable beam by an attaching means which selectively permits the basket to rotate for permitting easy access to an inju... | 06/15/1982 |
| 4331215 | Controls for aerial lift platform apparatus Controls for an aerial lift platform apparatus which has a steerable mobile chassis, a rotatable upper works, and an extensible boom pivoted on the upper works for luffing movement. The controls are grouped to provide a first group of control members in p... | 05/25/1982 |
| 4271926 | Rotatable work platform A work platform frame is connected to a vertically disposed pin fixed to one end of a boom. An idler bracket is also pivotally mounted on the pin and has outwardly extending first and second idler arms, which are offset, with respect to each other, by bet... | 06/09/1981 |
| 4202427 | Derrick escape system An escape system for delivering personnel on a drilling rig to a safe location in the event of a blow out or other dangerous situation. More specifically, a personnel capsule is releasably maintained in an unbalanced disposition by an A-frame structure ad... | 05/13/1980 |
| 4137994 | Constant level scaffold adapted for use with a tilt bed truck A versatile, low cost scaffold is constructed of commonly available materials and is adapted to be placed upon the bed of a tilt bed truck. When thereupon placed, the platform of the scaffold remains level as it is raised by tilting the bed of the truck. ... | 02/06/1979 |
| 4116304 | Aerial personnel lift including means for automatically controlling the position of the personnel bucket An aerial lift comprising a wheeled frame having a telescoping boom pivotally and rotatably mounted thereon. A personnel bucket is pivotally secured to one end of the boom for supporting a person therein. An electrical screw-motor apparatus is pivotally s... | 09/26/1978 |
| 4103757 | Tripod aerial lift A man-carrying aerial bucket universally positionable in three planes is mounted on a tripod arrangement comprising three hydraulic cylinders. The upper ends of the cylinder pistons converge toward, and are connected to, a universal vertex connector pin a... | 08/01/1978 |
