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| Number | Title | Issue Date |
| 6971657 | Driver access system for motor truck tractor An access system for a terminal or a yard type motor truck tractor includes three vertically and laterally spaced steps which are mountable on the tractor frame just aft of the tractor cab to provide access between ground level and a deck or platform of the tractor ... | 12/06/2005 |
| 6907957 | Trench shield ladder A trench shield ladder that hangs on the wall of the trench shield to provide workmen safe access to a trench. The ladder is provided with a top platform and hand rails that extend over the platform. The ladder can be adjusted in length by employing an extension por... | 06/21/2005 |
| 6533069 | Multi-use ladder support apparatus A multi-use support apparatus mounts a ladder to a support structure. The support apparatus can be configured for use with different support structures, such as parapet walls, flat roofs, sloping roofs and vertical beams or purlins. The support apparatus ... | 03/18/2003 |
| 6029773 | Tubular emergency exit for buildings The present invention refers to a tubular escape system for buildings consisting of a combination of a platform, multiple uprights located around the perimeter of the platform to support the railings, a door connecting the building interior on that floor ... | 02/29/2000 |
| 5769181 | Ladder bracket and staging utilizing the same A ladder support bracket for staging in which a pair of ladders are supported in a vertical position spaced from a wall and having a staging element supported by the ladder rungs. The support bracket is a rigid A-frame and the ladder is tightly clamped be... | 06/23/1998 |
| 5492197 | Frame parts for temporary ladder A temporary scaffold comprising a platform section and an auxiliary section, each comprising a E-shaped frame formed of an arrangement of pipes. The pipes are telescopically connected in end-to-end relationship. As a result, the platform and auxiliary sec... | 02/20/1996 |
| 4909351 | Platform attachment for a ladder A platform attachment for a ladder having a pair of spaced apart sidepieces connected together by a series of spaced apart rungs includes a pair of spaced apart slideways mounted on the ladder adjacent to respective sidepieces, and a platform extending be... | 03/20/1990 |
| 4848517 | Tank safety ladder A safety ladder particularly suited for permitting access to the top of a tank having a convex exterior surface is provided. The ladder is designed to provide a safe vertical path between the ground and a flat work platform attached to the ladder at the t... | 07/18/1989 |
| 4735285 | Boat ladders with slide-out step A ladder device for the transom of a boat has a platform unit and a step unit that may be moved between a use position with a step thereof immersed in the water in which the boat floats and a storage position where the step is located out of the water. Th... | 04/05/1988 |
| 4527366 | Curvilinear stairway constructions A curvilinear stairway construction for mounting to a curvilinear wall includes a plurality of stringers which are mountable one above the other and which are normally straight, but bend such that the curvature of the stringers is substantially concentric... | 07/09/1985 |
| 4411335 | Hunter's tree stand A hunting stand and access ladder are disclosed for use by a hunter to support himself at an elevated position in a tree. The hunting stand includes a frame with a seat and foot support on it, an upper support means on the frame comprising a pair of prong... | 10/25/1983 |
| 4355700 | Modular stairway system for installation on structures having non-linear walls This application discloses a modular stairway system for circular structures or other structures having non-linear walls. The invention comprises a plurality of first stringer means with a plurality of first connecting means integral to said first stringe... | 10/26/1982 |
| 4096923 | Fire escape to be attached to the outside of a building It is well known that large buildings, for example hospitals, apartment buildings, hotels, schools, industrial buildings, theatres, etc. shall be provided with a fire escape attached to the outside of the building, on a facade having a safety outlet on ea... | 06/27/1978 |
