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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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,...
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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...
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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...
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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...
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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...
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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.
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D283072 |
Self-propelled aerial work platform
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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4060148 |
Portable collapsible scaffold structure
A portable collapsible scaffold structure is adapted to be supported in use upon and transported by a truck or other self-powered ground vehicle, and includes a pair of extensible ladders adapted...
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4044902 |
Aerial lifting equipment
Aerial lifting equipment having a platform, a support structure and means rotatably mounting the support structure upon the platform for rotation about a substantially vertical axis. A boom...
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3994365 |
Apparatus for positioning person within container tank
An apparatus for positioning a person within a container tank for inspection, cleaning, or repair of such tank is described. The apparatus includes a pivoted parallelogram type support having a...
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3917026 |
Aerial platform utility enclosure assembly
A modular three-part preformed lightweight synthetic resin panel assembly comprising an aerial platform utility enclosure designed to be installed upon the outer structural surfaces of the frame...
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3866713 |
AERIAL PLATFORM APPARATUS
Apparatus for moving an operator in three dimensions relative to a work location, such as a fruit bearing tree. A mobile vehicle carries a pair of towers which in turn pivotally and rotatably...
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3825095 |
AERIAL SCAFFOLD FOR VEHICLE
A vertically movable aerial scaffold which is mountable and demountable on the bed of a pick-up truck includes stabilizer bars telescopically received in channel members connected to the frame of...
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3590948 |
BASKET-LEVELING SYSTEM FOR BOOM STRUCTURES
A mobile aerial tower having a pivotally mounted boom for movement about a vertical and a horizontal axis, and a load-supporting platform such as a workman's basket supported on the outer end of...
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3498484 |
OVERHEAD ATTACHMENT FOR THE BOOM POINT OF CRANES
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3470981 |
STRESS-COMPENSATED BOOM STRUCTURE
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3452528 |
CARRIER APPARATUS FOR FRUIT PICKERS
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3451505 |
WORKING ENVIRONMENT CONTROL APPARATUS
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3103345 |
Cable guiding device
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