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7407039 |
Portable hoist lifting frame kit
A portable hoist lifting frame kit has a cross beam 12 that can support an electrically, mechanically, hydraulically or pneumatically operated hoist. The cross beam is secured to or supported by...
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7395900 |
Portable wheelchair lift
Systems and methods for lifting a wheelchair in non-residential indoor facilities. Guide rails extend from a wheeled-base and include a bearing and transmission system for raising and lowering a...
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7261184 |
Elevator system and triangulated support structure for the same
The invention comprises a support structure for an elevator system comprising a pit channel module having a first leg and a second leg connected at a corner, a header module having three sides...
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7194842 |
Portable observation tower
A portable structure from which hunters and wildlife observers can command elevated views of wildlife habitat. Commonly called a blind, it can be constructed as a stand-alone structure and...
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7059451 |
Load lowering system
A system for mechanically lowering a load from an elevated position to a lower position in a relatively slow and controlled manner using only gravity and frictional forces. The system includes a...
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6308802 |
Mobile elevator assembly
A mobile elevator assembly which may be used for gaining access to balconies and the like for purposes of moving furniture further comprises a trailer base upon which all components are mounted, a...
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6257556 |
Safety fence used on a building being constructed
A safety fence used in a field of a construction work includes a guide rail disposed parallel to an outer wall of a building being constructed. A fence frame is disposed to cover the outer wall and...
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6167670 |
Casing system for dumbwaiters
A system for building shaft casing for dumb-waiters in a building structure with prefabricated assemblies that are readily stackable over each other. One lower, middle and top assemblies constitute...
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6050770 |
Stabilization system for load handling equipment
A processor implemented stabilization system for load handling equipment monitors at least a portion of the equipment weight load at an equipment support member. Reduction below or increase above...
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5791860 |
Hydraulic platform lift for a truck tailgate
A hydraulic platform lift for trucks, having hydraulic and electrical circuitry to provide automated, or automated with manual override, platform levelling capability in the event the truck is...
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5584363 |
Locking system for stabilizers
A swing-up stabilizer for a portable lift has a bracing strut with a pivoted locking mechanism at its upper end including a locking plate on the strut which is spring biased into a tilted locking...
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5509502 |
Construction elevator
An elevator apparatus for providing an elevated support structure. The apparatus is comprised of a base unit, a plurality of tower sections, and an elevating device. The tower sections may be...
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5449267 |
Liftgate platform with latchable retention ramp
A lift platform has a retention ramp whose forward edge is pivotally connected to a rear edge of the platform by a hinge that permits inversion of the retention ramp to a stowed position overlying...
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5373915 |
Passenger lift with an electric safety interlock
A passenger lift incorporates an electronic safety interlock to prevent all movement of the lift, until a restraining belt is fastened. In some embodiments, the interlock is a normally open...
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5281077 |
Portable watercraft lift
A portable watercraft lift including a pair of transverse, laterally spaced apart, arch shaped support members which are each detachably connected at the top thereof to one end of an elongated...
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5176226 |
Tailgate closing mechanism for tailgate hoist
A tailgate closure mechanism for a tailgate hoist serves to move the tailgate from the horizontal position in which it functions as a platform to the upright position in which it functions as a...
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5143181 |
Platform lift apparatus
An apparatus wherein a base plate mounts a plurality of base plate tubes, each mounting stabilizer legs, wherein the stabilizer legs are provided to include leveling screws to provide leveling of...
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5122026 |
Cargo platform with plural storage positions
A cargo platform system particularly structured for use with, e.g., a truck body's cargo opening. The system includes a mast asembly with a mast guide and a mast movably supported by the guide, the...
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5110251 |
Hydraulic platform lift for truck trailers
A hydraulic platform lift for use on trucks and truck trailers has two hydraulic cylinders, one on each side of a door. The cylinders are phasing cylinders in that one cylinder is larger than the...
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5058708 |
Scaffold and hoist structure
A hoist for a scaffold assembly includes a track assembly with starter, extension and head sections adapted for mounting on lower, intermediate and upper frames of the scaffold assembly. The head...
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4557353 |
Service elevator for construction
A construction elevator has a mast formed from sheet steel panels and bolted together through rows of holes along longitudinal edges of the mast which are provided with flanges also having such...
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4546853 |
Portable folding platform apparatus used with a ladder and winch
A portable folding platform apparatus is disclosed which may be removably mounted on an extension ladder having a winch removably mounted at the top of the ladder. The apparatus may be used to lift...
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4415066 |
Manhole service vehicle
An improved manhole service vehicle having an enclosed working space and an opening in its floor sized at least as large as a work man to permit him to service a manhole while the service vehicle...
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4324317 |
Elevator device
This invention is an electrically powered elevator comprised of a hollow support member through which a screw passes. A reversible electric motor rotates the screw. A support nut attached to a...
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4165810 |
Rolling-cargo loading/unloading ramp having a stowable lift for palletized cargo
An inclined ramp, for loading and unloading rolling cargo between ground level and a cargo bay of an air transport, incorporates a stowable lift for handling palletized cargo which is deployable...
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4049081 |
Operator-actuated elevating device
An elevatable operator-actuated lifting device, including a lower support frame and a platform section telescopically interfitted with the support frame as to be elevatable with respect thereto....
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3865346 |
PORTABLE VEHICLE LIFT
A portable vehicle lift has a generally T-shaped frame that underlies the vehicle being lifted and rides along three triangularly spaced stanchions at the exposed ends of the beams comprising the...
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3819013 |
TOBACCO HOIST
A hoist for raising sticks containing uncured tobacco suspended therefrom into the loft of a barn or other tobacco curing area and manipulating the sticks to position horizontally suspended across...
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3763964 |
OUTSIDE ELEVATOR
An outside elevator used for the purpose of hauling men and materials in and out of a multi-story building during construction or other periods depends solely for the support of its own weight and...
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3697048 |
BOAT HOISTS
A novel boat hoist including a supporting framework which is designed to be readily assembled and installed wherever desired, said hoist apparatus featuring a new and improved manually-actuated...
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3627079 |
ELEVATOR SYSTEM FOR MINE SHAFT
An underground elevator system for mine personnel comprised of support mast formed from a plurality of prefabricated structural sections that are connected in an end-to-end arrangement and secured...
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3517774 |
TOWER ELEVATOR
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3478904 |
CARGO LOADING MECHANISM
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3476212 |
COMBINATION STEPLADDER AND VERTICALLY MOVABLE PLATFORM
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3388511 |
Multiple shaft tower construction
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3313376 |
Lightweight elevator
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3276546 |
Knock down building material elevator
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3174634 |
Telescopic multi-purpose lifting unit
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3032319 |
Tray type scissors lift
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3009546 |
Self-erecting tower structure
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2855072 |
Hoist
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2754934 |
Vehicle hoisting apparatus
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2714434 |
Power driven winch and hoist mechanism
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2702095 |
Baled hay hoist
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2644545 |
Elevator tower assembled from prefabricated panels
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2588959 |
Extension ladder and hoist therefor
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2531346 |
Builder's hoist
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2284360 |
Extendible builder's tower
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2261013 |
Builder's tower
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2066221 |
Hoisting tower
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