Class 182/207 - Extension

Subclass of Class 182 - Fire escape, ladder, or scaffold
Definition: Device comprising lapping ladder sections relatively movable
No. of patents: 37
Last issue date: 10/05/2010

Number	Title	Issue Date
7806233	Access ladder and method An access ladder for an access hole in a building includes a plurality of sections which telescope relative to each other between an extended position, where the sections define a plane and a user can climb the sections, and a retracted position where the sections a...	10/05/2010
7316293	Extension ladder with improved mechanism An extension ladder with improved mechanism includes a plurality of ladder sections, connection kits, locking mechanism, and transverse step portions; wherein each ladder section is a hollow rung, and the caliber of the rung becomes smaller when it is in a higher lo...	01/08/2008
7284947	Braced telescoping support strut and system A telescoping support strut configured to support a conveyor assembly of a portable conveyor system includes a first strut section and a second strut section configured to telescopically receive and substantially surround beams of the first strut section. The first ...	10/23/2007
7267197	Add-on extension ladder An add-on extension ladder is removably mountable to a portion of a conventional ladder to extend the reach of the conventional ladder without any structural modification to the conventional ladder. The add-on extension has integral elements for engaging rungs on th...	09/11/2007
7137478	Ladder safety cage A safety ladder cage system is of a fabricated construction to reduce the time and expertise to provide a safety cage to one side of a scaffold system access ladder. The safety cage system is divided into two components each of which can be carried by a worker to th...	11/21/2006
7100741	Roller assembly for a ladder An aerial ladder roller assembly to improve the function of the ladder during extension and retraction of sections of a multiple-section aerial ladder. One embodiment has a plurality of aligned apertures for rotatably mounting and a roller that is rotatably mounted ...	09/05/2006
7048094	Extending ladder and associated manufacturing methods Extending ladders and associated manufacturing methods are disclosed. A ladder in accordance with an exemplary embodiment of the present invention comprises a plurality of rung units, each rung unit including a left column, a right column, and a rung extending betwe...	05/23/2006
6913113	Adjustable-height ladder An adjustable-height stepladder has an upper-front frame and an upper-rear frame interconnected by a top member. The upper-front frame and the upper-rear frame each have an elongate slide track. A lower-front frame, wider than the upper-front frame and positioned ce...	07/05/2005
6883645	Extending ladder and associated manufacturing methods Extending ladders and associated manufacturing methods are disclosed. A ladder in accordance with an exemplary embodiment of the present invention comprises a plurality of rung units, each rung unit including a left column, a right column, and a rung extending betwe...	04/26/2005
6708800	Extending ladder and associated manufacturing methods Extending ladders and associated manufacturing methods are disclosed. A ladder in accordance with an exemplary embodiment of the present invention comprises a plurality of rung units, each rung unit including a left column, a right column, and a rung extending betwe...	03/23/2004
6269909	Fiberglass extension ladder and methods for manufacturing the same An extension ladder comprised of a pair of base rails interlocked in a tongue and groove relationship with a pair of slide rails is disclosed. The rails may be manufactured in a variety of shapes including "I" beams, rectangles, boxes, or even ovals or ci...	08/07/2001
5924523	Adjustable ladder An adjustable ladder includes a base ladder and at least one extendable ladder movably fastened on the base ladder, the extension of which ladder can be locked by a locking bracket pivotally fastened on the extendable ladder. Locking is operated by a cabl...	07/20/1999
5896945	Ladder safety tip strap A ladder tie strap is wrapped around adjacent rungs of upper and lower ladder sections in an extension ladder to prevent the upper ladder section from accidentally retracting relative to the lower ladder section. A fair of tie straps may also be secured t...	04/27/1999
5758745	Extension ladder, combination end cap/guide bracket, and method for climbing An extension ladder comprises a base section comprising a first base rail, a second base rail in spaced relationship and in parallel with the first base rail, and at least a first base rung connected to the first base rail and the second base rail. The ex...	06/02/1998
5738186	Extensible ladder An extensible ladder includes a plurality of sections, each having a pair of tubular uprights connected by a rung, with the uprights of each section being slidably engaged with the corresponding uprights of an adjacent section. The inside surface of the t...	04/14/1998
5524398	Portable collapsible tower A portable collapsible tower including a frame, at least one stationary tower member fixed to the frame and at least one movable tower member movable along the exterior portion of the stationary tower member relative to the stationary member. A coupling, ...	06/11/1996
5439072	Modular ladder system A modular ladder system for climbing trees is provided, comprising at least two ladder modules, each ladder module comprising a hollow, primary support member having an upper end and a lower end; a secondary support member, telescopingly slidable within t...	08/08/1995
5350038	Foldable extension ladder and ladder sections therefor A foldable extension ladder includes first and second ladder sections; each ladder section including a three foldable sections, each foldable section including a pair of end rails and a plurality of transverse rungs connecting the pair of end rails in a p...	09/27/1994
5103934	Method and apparatus for providing a fire escape for a multi-story building An emergency escape system for multistory buildings in which stair units are stored in recesses in the floor of each above grade level of the building. The stair units are released for gravity depolyment to the next below balcony in an emergency, and a co...	04/14/1992
5024291	Ladder assembly A ladder assembly for ease of access to a wharf or pier is disclosed. The ladder assembly includes a pair of vertical frame members having channels therein which are disposed about a ladder which is free to move upwardly and downwardly within the channels...	06/18/1991
4924970	Ladder apparatus A ladder apparatus adapted to be borne by a fixture, such as cabinet, including a bracket adapted to be mounted on the fixture, a pair of first support members individually, substantially pivotally mounted on the bracket, a pair of second support members ...	05/15/1990
4854420	Securing means for a double step ladder A securing means for a double step ladder having a U-shaped element, a coupling element, a retaining rod received within the openings provided on the distal ends of the lateral walls of the U-shaped element, a flap fixed on the lateral wall of the U-shape...	08/08/1989
4750587	Ladder and method of using ladder for escape An escape ladder at rest is an elongated cylindrical body divided lengthwise with a plurality of rung devices hingeably attached between rear quadrants and between front quadrants lockable in a horizontal position and foldable into the tubular body when l...	06/14/1988
4586585	Longitudinally extensible stringer and stairway My invention relates to an extensible stairway capable of being shipped in a knockdown condition and erected with a minimum of labor and without special tools. The stairway has a pair of stair step stringer assemblies each stringer assembly having a pair ...	05/06/1986
4519478	Ladder extension coupling A ladder extension is disclosed comprising two separable sections to be coupled together in longitudinally overlapping relation by first coupling means coupling a portion of a first ladder section proximate one end thereof to the second section so as to p...	05/28/1985
4491196	Telescopic beam A telescopic beam for use in an inclined hoist has five telescopic members. An actuator comprising a motorized winch and a block and tackle arrangement is provided for extending the telescopic members relative to one another. The block and tackle arrangem...	01/01/1985
4429766	Ladder consisting of sliding sections A sliding section ladder, comprising sections of varying widths made up of u-shaped modules, comprising a base and upright sections, each module being smaller in width than the one immediately before it, the outer sides of the smaller module backing into ...	02/07/1984
4401185	Safety control system for container operations The system for safety control utilizes an anchoring device including mounting structure at one end for mounting the device removably on a corner fitting of a container by engagement in any one of the several apertures of the corner fitting, and structure ...	08/30/1983
4376470	Fiberglass ladder A combination step and extension ladder manufactured of composite material such as fiberglass is disclosed. The inner and outer side rails are molded fiberglass so that the fibers are angularly oriented with respect to the longitudinal axis of the respect...	03/15/1983
4355701	Ladder A ladder assembly includes a supporting bracket to pivotally mount one end of a ladder member; the ladder member comprises an elongated support member which suitably comprises a tubular pole, and a plurality of spaced apart rung members extending transver...	10/26/1982
4210224	Longitudinally variable ladder A longitudinally variable ladder with at least two ladder parts which are displaceable relative to one another in their longitudinal direction, one part of which with its two struts forms a guide for the struts of the other part, which latter struts engag...	07/01/1980
4161997	Self-storing step structure for vehicular mounting A self-storing step structure for vehicular mounting including a first step section, means for pivotally connecting the first step section to a vehicle for pivotation about a horizontal axis between an operative position and a stored position, an extensib...	07/24/1979
4157742	Accommodation ladder arrangements Accommodation ladder having a first flight of steps of adjustable length with one end adapted for connection to a ship while its opposite end is pivotably mounted about a horizontal axis at a given level above the quayside. This flight of steps is also mo...	06/12/1979
4102433	Ladder An extension roof ladder is disclosed having conventional extension ladder sections for use at the side of a building and connected thereto a flexible roof ladder section having a plurality of shorter subsections for use on the near side of a roof and one...	07/25/1978
4100995	Telescopic set of steps with variable slope A telescopic set of steps comprises at least two frames, each of which consists of two parallel members forming stringboards, one end of one of the frames being pivoted to a fixed support for pivotal movement about a horizontal axis, and the other frame b...	07/18/1978
3948352	Extension ladder with ladder leveler means A extension ladder formed of interlocked top and bottom sections has ladder leveler means comprising a pair of sleeve members that slideably encompass the lower end of the bottom section siderails. A short flange on each sleeve member is captivated by a g...	04/06/1976
3948353	Extension ladder An extension ladder in which the extension part has a plurality of striated cut-out portions along the leaning edge to serve as hooks for hooking onto a gutter or top edge of a sidewall or roof of a building to prevent lateral or vertical sliding. A linin...	04/06/1976

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Class 182/207 - Extension