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| Number | Title | Issue Date |
| 8104580 | Locking mechanism for a ladder A locking mechanism for a collapsible ladder (1) comprising several ladder sections (5), each ladder section comprising two ladder bars (2, 3) arranged parallel to each other and interconnected at one end by a rung to form a U-shaped ladder sect... | 01/31/2012 |
| 8074771 | Safety ladder Safety ladders to provide egress from water to a dock or boat or the like are disclosed. Safety ladders in accordance with the present invention are mountable to a structure, upwardly collapsible to a first storage configuration, and downwardly extendible to a secon... | 12/13/2011 |
| 8066099 | Retractable ladder The present invention discloses a retractable ladder which is a common climbing tool in daily life and engineering industry. The retractable ladder comprises a pedal operated unlock device, section-positioning lock devices and an accidental operation preventing devi... | 11/29/2011 |
| 8056679 | Retractable ladder A retractable ladder includes telescoping rail sections each having left and right side rail members. Each side rail member has two aligned locking holes. A control device includes a shaft disposed rotatably between the side rail members of one of the rail sections,... | 11/15/2011 |
| 8028805 | Access ladder with plungers An access ladder for accessing a ceiling from a floor. The ladder comprises a plurality of sections which telescope open and closed, and from a bottom section each section telescopes open to positively lock to the section below it with plungers that lock and unlock ... | 10/04/2011 |
| 8011475 | Ladder An extension ladder, including multiple ladder sections, each including a pair of pin holes, a pair of columns, and a rung, including a pair of pins, a pair of springs, a gear, a pair of gear racks, and a pair of mounting rings, wherein the columns of adjacent ladde... | 09/06/2011 |
| 7748498 | Access ladder with plungers An access ladder for accessing a ceiling from a floor. The ladder comprises a plurality of sections which telescope open and closed, and from a bottom section each section telescopes open to positively lock to the section below it with plungers that lock and unlock ... | 07/06/2010 |
| 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 |
| 7264253 | Truck tailgate step A tailgate step for use on a vehicle. The step includes a guide rail bracket. A sliding member is arranged within the guide rail bracket. A support arm is pivotally connected to an end of the sliding member. A fact plate is secured to the guide rail bracket. The ste... | 09/04/2007 |
| 7159693 | Window shutter escape ladder A novel escape system comprised of a plurality of escape devices each which resemble a window shutter, are mounted on the outside of a building, adjacent the windows vertically above the next lower escape device. Since these take up no space inside of the building, ... | 01/09/2007 |
| 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 |
| 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 |
| 6880675 | Multifunctional adjustable ladder assembly A ladder assembly includes two symmetric support stands pivotally connected with each other. Each of the two support stands includes a main frame, an upper frame, a lower frame, a top bar, a retraction control unit, and four fixing devices. Thus, height of the ladde... | 04/19/2005 |
| 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 |
| 6612782 | Telescoping tube and method for supporting surrounding walls of a shaft A telescoping tube for supporting surrounding walls of a shaft during the rescue of a victim trapped at the bottom of the shaft. The tube has nesting interlocking successive sections, each successive section having a diameter smaller than the preceding se... | 09/02/2003 |
| 6520291 | Portable lookout The lookout, designed to lean against a substantially cylindrical and vertical support extending above the ground, comprises a ladder having at least one upright provided with a plurality of rungs spaced at a predetermined distance. The ladder is telescop... | 02/18/2003 |
| 6505707 | Combination tree stand, blind and equipment carrier A combination tree stand, blind and equipment carrier having a platform to support a user thereon within a user enclosure, a top frame member defining an upward opening of the enclosure, and first and second hinge assemblies connecting the top frame to th... | 01/14/2003 |
| 6345691 | Ladder latch system A Ladder Latch System for securing telescoping ladders in the retracted position is described. The latching system is a component of a telescoping ladder system, which has as its main components a plurality of telescoping ladder legs, a ladder-mounting br... | 02/12/2002 |
| 6129179 | Laterally extensible ladder A laterally extensible ladder comprises first and second uprights having a plurality of adjacent rung assemblies mounted therebetween. Each rung assembly includes a first hollow rung element that defines a rung axis and a second rung element received in t... | 10/10/2000 |
| 6099233 | Ramp for vehicles A ramp, for loading the box of a pick-up truck, has a pair of stringers and slidable rungs joined by lengths of chain. The stringers may be telescopically stored in storage tubes located on the box floor. The chains that join the rungs limit their separat... | 08/08/2000 |
| 6073726 | Adjustable step ladder An adjustable step ladder having four fixed side rails which are wider apart at the bottom than at the top. The step ladder has a conventional series of steps along one side. At the bottom of each of the legs an adjustable leg is located so that the ladde... | 06/13/2000 |
| 5752580 | Modular ladder system A portable ladder module is provided, comprising a primary support member having a first step; a secondary support member having a second step, wherein the secondary support member is slidable relative to the primary support member. A lock is operatively ... | 05/19/1998 |
| 5743355 | Retractable ladder A retractable ladder having a low coefficient of friction plastic bushing is received within a coupling that joins a ladder rung to the associated longitudinal stile. The coupling is press fitted to the bushing, compressing a portion of the bushing agains... | 04/28/1998 |
| 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 |
| 5645140 | Self-supported collapsible ladder A self-supporting collapsible ladder comprising a plurality of ladder sections with pin-locking mechanisms which secure adjacent ladder sections into an extended position. The ladder has a mechanism for self-supporting the ladder assembly by the use of br... | 07/08/1997 |
| 5495915 | Collapsible ladder A collapsible ladder comprises telescopically collapsible sections, and latch mechanisms in each of the rungs for automatically locking the sections relative to one another when the sections are extended. The latch mechanisms are arranged to release the s... | 03/05/1996 |
| 5205603 | Truck tailgate ladder apparatus A ladder assembly is mounted slidably and telescopingly within a tailgate portion of a truck bed to include a respective first and second ladder member extensibly mounted relative to the tailgate, and more specifically to a cavity therewithin, to provide ... | 04/27/1993 |
| 5062499 | Side rails fastening mechanism for telescopic aluminum step ladders A side rails fastening mechanism for securing the frame fractions of the side rails of a telescopic aluminum step ladders in an extended or collapsed position, comprising an insert block fixedly secured inside each frame fraction at a lower position with ... | 11/05/1991 |
| 4989692 | Multi-purpose extendable and retractable ladder A ladder that includes two hinged sections that can be oriented in an inverted V-configuration for use as a step ladder, or in a straight linear configuration for use as a straight ladder. Each section of the ladder includes a number of U-shaped support u... | 02/05/1991 |
| 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 |
| 4923360 | Collapsible tailgate ramp A portable tailgate ramp for attachment to pickup trucks, moving vans or the like is disclosed. The device is so constructed that it collapses to a shallow depth for storage on a tailgate and can be extended therefrom to form a ramp for running vehicles i... | 05/08/1990 |
| 4592446 | Portable telescoping tree stand A portable telescoping observation stand attachable to a pole, a tree or like object by way of straps includes a plurality of telescopically engaged sections maintained in an extended position by locking members removably received in slots in overlapping ... | 06/03/1986 |
| 4476957 | Unitary window safety bars and exterior fire escape ladder A pair of frames are slidably interfitted on a common slide axis. Safety bars placed normal to the slide axis and alternately opposite sides of the slide axis, are fixed in the frames in sliding noninterference and for halving space between bars when fram... | 10/16/1984 |
| 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 |
| 4406097 | Telescopic mechanism A telescopic boom arrangement comprises an innermost member, a plurality of intermediate tubular sections 12, and an outermost tubular member, each nested together, the arrangement being adapted so that sequential erection of the members from a stowed pos... | 09/27/1983 |
| 4244443 | Drawer type emergency escape A drawer type emergency escape is constituted by a stowage box attached to a support, a slidable frame normally received in the stowage box and extended out of the stowage box as the escape is employed, and a shift mechanism for pulling the slidable frame... | 01/13/1981 |
| 4240521 | Drawer type emergency escape A drawer type emergency escape is constituted by a stowage box adapted to be attached to a support, a slidable frame adapted to be slidably extended out of and retracted into the stowage box, a telescopically extensible escape means attached to the slidab... | 12/23/1980 |
| 4236601 | Turning type emergency escape A turning type emergency escape is constituted by a rotary stowage box defining an evacuation passage therein, upper and lower covers pivoted to upper and lower portions of the inner side of the evacuation passage, a cover interlocking mechanism interlock... | 12/02/1980 |
| 4232761 | Extensible ladder A portable, extensible ladder is disclosed of the type having a plurality of sections sliding into each other. The normally uppermost section is provided with hook for suspending the ladder from a window sill or the like. The same, normally upper section ... | 11/11/1980 |
| 4139079 | Flexible stile or rope ladder for climbing poles or like members A flexible stile ladder is disclosed wherein the midpoints of the ladder steps or rungs are slidably connected to the pole. Preferably, the slidable connectors are slides which operate in a track carried by the pole. The invention is particularly useful f... | 02/13/1979 |
