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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 8177028 | Ladderway system for underground raises A ladderway system for an underground raise includes an elongate tube adapted to generally conform to the shape of the raise. The tube is of circular cross-section to generally conform to the shape of a round bored raise. The tube is formed with a longitudinal slit ... | 05/15/2012 |
| 8141682 | Security cone-door for a ladder A first embodiment of the security apparatus comprises a retaining collar; a plurality of segments forming a generally frusta-conical enclosure, with one or more of the segments having an access opening therein; and a lockable access door covering the opening. The r... | 03/27/2012 |
| 7992681 | Portable safety ladder assembly A safety ladder assembly and a safety extension used in combination with a ladder suitable to permit safe and easy access to the landing areas, working platforms, scaffolds, etc. The assembly includes safety extension members having a plurality of horizontal handgri... | 08/09/2011 |
| 7793759 | Ladder locking device and method A ladder locking device is disclosed. An illustrative embodiment of the ladder locking device includes a frame having a plurality of intersecting frame segments pivotally connected to each other in a scissors jack configuration and a foldable blind carried by the fr... | 09/14/2010 |
| 7717231 | Ladder guard A ladder guard (10) for use with a ladder (8) having a plurality of rungs (8a-8f). The ladder guard has a first position, in which respective portions (21-23) of the ladder guard are located in front of a numbe... | 05/18/2010 |
| 7383920 | Step stool with movable handrail A step stool includes a step frame and a handrail movable relative to the step frame between lowered and raised positions. The handrail includes a handle and left and right handle support arms coupled to the handle to allow sliding movement of the handle relative to... | 06/10/2008 |
| 7377080 | Stowable spiral staircase system for overhead space access A staircase system (2) includes a rail element (40) and multiple stair elements (42). Baluster elements (44) are coupled to the rail element (40) and to the stair elements (42). A center support system (46) is coupled... | 05/27/2008 |
| 7370725 | Motorized rungless ladder A device supported by a ground surface and a structure for at least one of elevating and descending a user. The device includes a first guide rail having a first channel extending along a length thereof and a second guide rail having a second channel extending along... | 05/13/2008 |
| 7322442 | Ladder top walk through extensions Walk through ladder extensions are provided to attach to the upper ends of ladder side rails, and define a wide unobstructed space between them. The extensions can be gripped by a user to steady the user as the user moves onto a roof of a building against which the ... | 01/29/2008 |
| 7318579 | Ladder hoist assembly A hoist assembly for use with an elevating device, such as a ladder, comprises a base structured for mounting the hoist assembly to the ladder or other elevating device. The hoist assembly includes a spool which is disposed in a normally secured orientation relative... | 01/15/2008 |
| 7284746 | Clamping apparatus and apparatus for use in erecting temporary guard rails An apparatus for use in clamping a structure at its edge, the structure having opposed surfaces, the apparatus comprising a stanchion, a first clamping assembly attached to the stanchion and a second clamping assembly selectively slidably moveable longitudinally alo... | 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 |
| 7261113 | Step-up cane A cane having a substantially vertical member, a base attached to the substantially vertical member with at least three legs and a first tread proximate the substantially vertical member, a second tread moveably connected to the first tread, the second tread having ... | 08/28/2007 |
| 7234689 | Clamping apparatus and apparatus for use in erecting temporary guard rails An apparatus for use in clamping a structure at its edge, the structure having opposed surfaces, the apparatus comprising a stanchion, a first clamping assembly attached to the stanchion and a second clamping assembly selectively slidably moveable longitudinally alo... | 06/26/2007 |
| 7225896 | Collapsible handrail mechanism A collapsible handrail mechanism for steps or a ladder including: an outer stringer and an inner stringer jointly pivotable about a pivot point; a stanchion located between the outer and inner stringers and pivotal... | 06/05/2007 |
| 7216741 | Safety cage for gangway A safety cage improves the safety of workers servicing tanker vehicles having top side hatches. A part or parts of the cage can be repositioned to permit the hatch cover to be opened and then can be returned to a safety enchancing position. ... | 05/15/2007 |
| 7213715 | Hoisting apparatus for use at a manhole A hoisting apparatus (10) for use at a manhole (1), comprising a supporting mast and a jib crane (14) connected at an angle to an upper end portion (16) of the supporting mast (12). The jib crane (14) has a front member (... | 05/08/2007 |
| 7195099 | Hinged supported roof scaffold A support member for roof scaffolding having a base plate that is designed to be secured to a roof deck. The base plate is operably connected to a hinged plate that carries on it a sleeve that is used to engage scaffolding. Because of the way the hinged plate is mou... | 03/27/2007 |
| 7185739 | Portable tether anchor / ladder roof anchor A portable tether anchor/ladder roof anchor assembly for attaching to and securing a ladder to the roof ridge of a building and providing a tether anchor for fall protection. One embodiment consists of an assembly attached to the rungs of a ladder to allow a ladder ... | 03/06/2007 |
| 7174993 | Safety railing A vertically adjustable safety railing system for obtaining safety railing access to the tops of mobile equipment of various heights such as tank trucks. The safety railing apparatus generally includes a plurality of posts, a railing, and activating means in communi... | 02/13/2007 |
| 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 |
| 7104361 | Ladder A platform ladder comprising two elongate ladder sections having feet at one end and an upper end, the upper end of each section being hinged to an upper rail, a platform pivotally secured to one ladder section below the upper end and adapted to interconnect with th... | 09/12/2006 |
| 7095428 | Systems and methods for marking ladders using sublimation heat transfer Systems and methods of marking ladders. In one embodiment, a method generally includes contacting a ladder portion with an image reverse printed on a paper sheet with at least one sublimation ink, and applying heat to the paper sheet such that at least a portion of ... | 08/22/2006 |
| 7090049 | Aquatic ladder adapted for marine applications The aquatic ladder was designed for ease of use, rather than ease of storage. It has wide, deep treads, arranged like a staircase, with side and upper railings which make it easy to enter or exit the water, even by elderly people, tired individuals, those carrying a... | 08/15/2006 |
| 7066299 | Portable ladder suspension apparatus or a portable ladder for suspension or the combination thereof A ladder suspension bracket releasably receives and suspends a portable ladder for use, storage, and transportation if on a vehicle (FIG. 1, FIG. 7) comprising of a receiving bracket (FIG. 4, or FIG. 8) and a lower distance maintenance br... | 06/27/2006 |
| 7063186 | Safety rail A portable modular safety rail (20) is taught for protecting workers during building construction and remodeling. The invention in the preferred embodiment consists of two upright stanchions (22) having a flat mounting plate (36) on the bottom w... | 06/20/2006 |
| 7017711 | Method for extending the leg of a ladder and apparatus therefor An extender and method for extending the leg of a ladder can both lengthen and stabilize the leg of the ladder. The extender includes a first channel shaped and dimensioned to receive the leg of the ladder. A second channel is shaped and dimensioned to receive the f... | 03/28/2006 |
| 7000753 | Bulkhead-mounted wood storage and transportation device A chute assembly for connecting an elevated area to a lower area, such as within a cellar entry enclosure, for transporting items. The chute assembly may also include a bin enclosure for storage of the items in addition to transporting them. ... | 02/21/2006 |
| 6957718 | Apparatus to assist a mechanic to work on a vehicle A device (10) which assists a person (P) in working on the engine (E) of a vehicle (V) includes a base member (11) which rests on the ground and has a socket (17) extending upwardly therefrom. A post assembly (23) includes a stem portion ... | 10/25/2005 |
| 6932194 | Safety rail for scaffolding A first embodiment of a safety rail for a folding scaffolding cart comprises a single hollow metal tube having two longitudinal ends and shaped to have three smooth 90 degree bends to fit diagonal posts of a folding scaffold. The portable scaffolding cart is a foldi... | 08/23/2005 |
| 6929094 | Restraint system, apparatus and method for ladder system A fall restraint system to be incorporated in an existing ladder system where there are ladder stations, each having a platform, a ladder extending up from the platform, a safety cage around an upper portion of the ladder, and a perimeter guard rail. There is a plur... | 08/16/2005 |
| 6926119 | Folding steps A climbing aid for assisting people to move up or down to different levels has steps that can be folded into attached integral handrails that circumscribe the steps when folded so that no parts extend outside of the boundaries of the handrails. ... | 08/09/2005 |
| 6926365 | Body support for automotive mechanics A mechanic's body support including first and second horizontally-oriented and spaced-apart base rails and first and second spaced-apart support rails. Each of the support rails has one end connected to a respective one of the first and second base rails. Each suppo... | 08/09/2005 |
| 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 |
| 6899201 | Hoop for a safety cage assembly of a ladder A hoop for a safety cage assembly of a ladder includes a rigid arcuate band having a first face, a second face, a first end and a second end. Each of the first end and the second end are secured to a ladder. A plurality of keyhole openings extend through the band be... | 05/31/2005 |
| 6880674 | Gate for above ground pool steps A door ladder assembly for use with the an above ground swimming pool, the assembly comprising a ladder having a plurality of steps, a door with a first side hingedly connected to one side of the ladder and arranged to hingedly move between open and closed positions... | 04/19/2005 |
| 6769513 | Swimming pool ladder A molded plastic pool ladder of A-frame shape having first and second sides consisting of assembled frame channel rail structures with a ladder slidable between lower and higher positions in one of the frame channel rail structures and movable feet on the bottom of ... | 08/03/2004 |
| 6739349 | Bulk milk tank with adjustable ladder A bulk milk tank having a ladder that provides access to a raised platform in a lowered position and moves to a raised position to provide ample operating room around the tank outlet valve. ... | 05/25/2004 |
| 6722470 | Anchorage adapter, systems and methods for use in fall protection A system for anchoring a lifeline includes a support member for the lifeline. The support member includes a first connector to attach the support member to a first type of anchorage. The system preferably further includes at least one adapter having a second connect... | 04/20/2004 |
| 6694677 | Transportable podium The invention relates to a transportable podium (1) with step elements (2) which in an operating position of the podium (1) have different heights above a floor (6). To facilitate the assembly and disassembly of a mobile podium (1) the invention provides ... | 02/24/2004 |
