Matches 1 - 20 out of 20


Match Document Document Title
RE44366 Lift drive device  
A lift drive comprising: a spiral drive element having an axis of rotation, a rack having teeth sized and shaped to be engaged by the spiral drive element, the rack having a longitudinal axis...
8402850 Load displacement apparatus  
A load displacement apparatus to displace a mobile platform along a structure includes a worm screw mounted on the platform for rotation about its axis that meshes with a plurality of support...
7771155 Multi-lift for lifting and storing motorcycles and other vehicles  
A multi-lift for lifting and storing motorcycles and other vehicles includes a column, incorporating a vertical threaded shaft therein. The shaft is capable of rotation in opposite directions...
7328774 Lift drive device  
A lift drive comprising: a spiral drive element having an axis of rotation, a rack having teeth sized and shaped to be engaged by the spiral drive element, the rack having a longitudinal axis...
7225899 Stair lift device  
A stair lift for lifting and lowering at least one person on a rail on a stairway. There is a carriage mountable to the rail, the carriage having a track engaging drive, and a motor to power the...
7093691 Portable scissor-lift-assembly  
A lift assembly includes a first platform provided with a top surface, a pair of opposed sides, and wheels and brackets connected to one of the sides for rotating the assembly. A plurality of...
6830132 Brake device for elevator  
A brake device for elevator, including a hollow box-shaped elevator car (1) for holding the passenger or luggage; block (5) having a pair of guide rails (6) for guiding upwards and downwards the...
6755283 Spiral propeller  
A spiral propeller provides a better secure and a more reliable spiral comprising spiral-lifting wheels, interlocking wheel interlocked with the spiral-lifting wheel, and fixed track supporting...
6598708 Tapered roller screw apparatus and its driven device  
A driving apparatus includes a roller screw that includes a main shaft, a plurality of roller shafts projecting radially outwardly and upwardly at an angle from the radial direction of the main...
6318503 Exterior emergency escape system for use on a multi-storied building  
An exterior emergency escape system for use on a multi-storied building that includes an escape module for holding people escaping from the multi-storied building and for moving along the exterior...
6098758 Tower hoist mechanism confined within a tower interior  
A hoist mechanism for raising and lowering a platform within the interior of a tower and confined within the tower interior. In a first illustrative embodiment, a motor driven worm gear drives...
5526903 Low profile, high load vertical rolling positioning stage  
A stage or support platform assembly for use in a synchrotron accurately positions equipment to be used in the beam line of the synchrotron. The support platform assembly includes an outer housing...
5433294 Geared elevator system  
A geared traction elevator includes a worm shaft, supported by a pair of tapered roller bearings in a gear box housing, one end of which projects out of an opening in the gear box housing and is...
4051923 Cableless cage elevator  
A cage elevator of the cableless type which is particularly simple, safe and reliable; which forms a simple, compact and sturdy frame, cage, drive units and threaded cylinder sections combination;...
RE03922 Title is not available  
RE02003 Title is not available  
RE02065 Title is not available  
RE02066 Title is not available  
3313376 Lightweight elevator  
3215227 Elevator drives  

Matches 1 - 20 out of 20