Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
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| Number | Title | Issue Date |
| 7578371 | Universal hinged treads for folding attic stairs A universal hinged tread system includes a folding stair set with one or more primary treads. At least one auxiliary tread is hingedly attached atop at least one primary tread. The folding stair set includes at least two hingedly attached sections. The hingedly atta... | 08/25/2009 |
| 7424933 | Ladder assemblies A folding ladder includes a hinge assembly having first and second ladder hinge plates each defining a plate opening and a plurality of locking slots. A housing is associated with the first ladder hinge plate and extends through the plate openings to provide a rotat... | 09/16/2008 |
| 7368647 | Support for a musical keyboard instrument A support for a musical keyboard instrument has a first leg, a second leg and an adjuster. The first leg is pivotally connected to the second leg and a rod is formed in a sidewall of the second leg. Two first spiral surfaces are respectively formed in a free end of ... | 05/06/2008 |
| 7364017 | Combination ladder, ladder components and methods of manufacturing same Ladder configurations and components are provided including an outer rail assembly which is longitudinally adjustable relative to an inner rail assembly. The outer rail assembly may include a pair of spaced apart outer rails each fixedly coupled to an associated sle... | 04/29/2008 |
| 7341392 | Lock device in an articulated joint for a foldable ladder An articulated joint for a foldable ladder includes an outer casing pair, an inner casing pair pivotally moving with respect to the outer casing pair, a lock device composed of a lock block and a locating pin. The locating pin has a ball end to be slightly squeezed ... | 03/11/2008 |
| 7311177 | Step stool, hinge and method A folding step stool includes a hinge mechanism. The step stool includes a first section connected to the hinge mechanism. The first section having a bottom step. The step stool includes a second section connected to the hinge mechanism. The step stool includes a th... | 12/25/2007 |
| 7306075 | Dynamic hinge for ladder A dynamic hinge includes a first member connected to a first ladder portion of a ladder, and a second member connected to a second ladder portion. The first member pivots relative to the second member about a pivot axis that does not intersect both the first and sec... | 12/11/2007 |
| 7264082 | Convertible ladder A ladder having a first ladder section, a second ladder section, an adjustable hinge mechanism, an engagement indicator and a static hinge mechanism. The adjustable hinge mechanism is mounted with respect to the first ladder and the second ladder so that the adjusta... | 09/04/2007 |
| 7234203 | Locking hinge for folding ladder A hinge for a folding ladder including a hinge latch movable between a locked position and an unlocked position disposed within a hinge latch cavity. The hinge latch includes a first locking portion protruding therefrom, an elongated slot formed configured to slidin... | 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 |
| 7140072 | Lockable ladder hinge A lockable hinge includes a first and second hinge member, a lock, and an actuator. The lockable hinge is coupled to a pair of ladder-leg sections and is arranged to allow the ladder-leg sections to move among closed-ladder, trestle-ladder, and straight-ladder posit... | 11/28/2006 |
| 7121381 | Move-on ladder system A system and method for providing an improved ladder for enabling a user to climb up or down and forward or backwards movement relative to a surface. The system enables increased mobility and stability. The system can be designed in multiple ways which some of them ... | 10/17/2006 |
| 7100739 | Step stool, hinge and method A folding step stool includes a hinge mechanism. The step stool includes a first section connected to the hinge mechanism. The first section having a bottom step. The step stool includes a second section connected to the hinge mechanism. The step stool includes a th... | 09/05/2006 |
| 7100740 | Portable boat trailer ladder The present invention teaches a boat trailer ladder which may be easily secured to and moved along the trailer rails. A hook is dimensioned and configured to engage standard boat trailer rails. An A-frame ladder provides steps from an approximately the level of the ... | 09/05/2006 |
| 7093321 | Lockable hinge A lockable hinge includes a first and second hinge member, a lock, and an actuator. The lockable hinge is coupled to a pair of ladder-leg sections and is arranged to allow the ladder-leg sections to move among closed, trestle-ladder, and straight-ladder positions. T... | 08/22/2006 |
| 7063341 | Collapsible skateboard A collapsible skateboard includes an upright handle having lower portion on which is fixedly mounted a bracket, a connector having a curved slot having a lower end formed with a horizontal recess, an upper end formed with a vertical recess, and a circular hole under... | 06/20/2006 |
| 7059799 | Method and device for reducing construction site track out A method for shaking vehicles comprises driving them over a series of appropriately spaced-apart, mutually parallel bars to vigorously shake the wheels, undercarriage, and body to free them of dirt, gravel and debris. An apparatus may have bars with the appropriate ... | 06/13/2006 |
| 7047655 | Snap locking angle adjustable device, in particular a carpenter's square The invention is a snap locking angle adjustable device, particularly applicable to carpenter's squares. Carpenter's squares, being used in rough environment, must be simple to adjust while providing robust snap locking at high angle precision. Prior art attains thi... | 05/23/2006 |
| 7025218 | Billboard advertising copy hoist system A hoist system can be used to raise articles. The hoist system can include a composite pole member having a bend, a mounting structure attachable to the composite pole member and a winch assembly. The winch assembly has at least one component attached to the pole. T... | 04/11/2006 |
| 7013518 | Collapsible loading ramp A collapsible loading ramp affixable to a raised surface in a non-permanent manner extending from the raised surface to the ground. The ramp is foldable by way of a hinge connecting the first ramp section to the lower ramp section. Rung units attach to the first and... | 03/21/2006 |
| 7007344 | Safety unit of hinge for folding ladder Disclosed herein is a safety unit of a hinge for a folding ladder to prevent a user's finger from being caught in the hinge when the hinge rotates. The hinge includes a first joint unit, a second joint unit, and a locking unit, and the safety unit is provided betwee... | 03/07/2006 |
| 6971478 | Tailgate ladder A ladder for a truck fitted with a pivotal tailgate, the ladder comprising a first leg portion pivotally coupled to a second leg portion, where at least one of the leg portions is fitted with at least one rung. An upper end of the first leg portion is pivotally atta... | 12/06/2005 |
| 6966529 | Foldable supporting framework A foldable supporting framework comprises a retaining seat has an upper positioning sheet and a lower positioning sheet. At least one movable block is rotatably fixed to the upper and lower positioning sheets. There are at least two supporting posts; one supporting ... | 11/22/2005 |
| 6923416 | Adjustable device with a musical keyboard stand An adjustable device includes a first disk mounted on a side of the first stand to have a finger hole to movably receive therein a finger, a second disk mounted on a side of the second stand to combine the first disk and having multiple adjusting holes defined in a ... | 08/02/2005 |
| 6904862 | Track for locating a ladder with respect to a gate on a deck A track has a housing with a bore therein that extends from a first end to a second end, a linear slot at the top of the bore, a radial projection perpendicular to the linear slot, an axial groove in the bore, a plurality of radial openings that extend through the r... | 06/14/2005 |
| 6719093 | Extension ladder and tree stand An extension ladder and tree stand for supporting a seated or standing person on an elevated platform against a tree trunk for hunting, photography, and the like. The ladder and platform collapse into a compact size and shape for carrying by a person. The ladder is ... | 04/13/2004 |
| 6588547 | Joint for an articulated ladder A joint for an articulated ladder comprises two outer casing parts, two inner casing parts, an arched lock piece, and an extension spring. The inner casing parts pivotally engages with the outer casing parts and the arched lock piece is located in the inn... | 07/08/2003 |
| 6422344 | Folding step ladder First and second ladder sections are each molded of a rigid plastics material, and each ladder section includes parallel spaced elongated leg portions integrally connected by two parallel spaced step portions. The ladder sections are pivotally connected b... | 07/23/2002 |
| 6343406 | Hinge on ladder A hinge on a ladder comprises outer casing pair, inner casing pair, a fixing plate with a shaft and three lock pins, a central rivet pin, and a button knob. The outer casing pair and the inner casing pair are pivotally engaged to each other in such a way ... | 02/05/2002 |
| 6318498 | Collapsible ladder A collapsible ladder provides a plurality of segments, each segment associated with one rung of the ladder. The segments may be folded into a flat or planar configuration, after which each segment may be folded against adjacent segments, thereby forming a... | 11/20/2001 |
| 6220389 | Folding ladder The pull-out sections of folding ladders must be locked on the guiding elements pertaining thereto for ladder use and should also be easily unlocked. A locking bolt used to fix the elements can be axially and manually moved inside a guide element against ... | 04/24/2001 |
| 6079072 | Foldable and rigidizable space spanning structure A frame assembly supports a work surface of either flexible material or of sections of foldable and unfoldable relatively rigid material all so that the frame assembly and material may either be unfoldable and rigidized or folded into a compact package. T... | 06/27/2000 |
| 5992566 | Pulling device for foldable ladder joint A pulling device for a foldable ladder joint, comprising: two inner bodies, having facing front surfaces, with aligned sets of three arc-shaped holes each along a circular path; an arc-shaped piece, inserted between the front surfaces of the two inner bod... | 11/30/1999 |
| 5967258 | Guardrail assembly A guardrail assembly for use on an elevated work platform includes a plurality of pivotally interconnected rail sections mounted on each side of the open front end of the work platform for movement between a collapsed position against the sides of the pla... | 10/19/1999 |
| 5954157 | Fiber/resin composite ladder and accompanying accessories A combination step and extension ladder manufactured of prestressed filament wound composite material such as fiberglass is disclosed. The inner and outer side rails are molded, filament wound composite material (fiberglass) wherein the fibers are continu... | 09/21/1999 |
| 5944141 | Foldable ladder A foldable ladder having rungs pivotally connected to the side rails, allowing the side rails to pivot from a position wherein the siderails are coplanar to the rung to a support position wherein the side rails are normal to the rungs.... | 08/31/1999 |
| 5924521 | Marine vessel overboard emergency system A marine vessel ladder system that is primarily used for overboard emergency situations. The ladder system is collapsible and separable into two pieces with one piece substantially smaller than the other. The smaller piece serves both as a retainer to hol... | 07/20/1999 |
| 5890561 | Connection between a ladder side rail and a hinged arm of a ladder hinge The connection between the ladder side rail (3) and the hinge arm (2) is performed through a form-matching and/or force-matching joining connection (FN, FV) in the corner regions (5, 6) of the profile of the hinge arms (2) and of the... | 04/06/1999 |
| 5871067 | Permanently affixed folding emergency escape ladder The present invention is a collapsible, folding emergency escape ladder having an attachment means for permanently affixing it to a window frame rough opening structural components that are present within the walls of all residential housed, a retention m... | 02/16/1999 |
| 5757650 | Method of correcting stock condition in an automated storehouse control and apparatus therefor, and method of correcting conveyance state of parts and apparatus therefor The disclosed is a method comprising the steps of displaying entirely a plurality of storehouse facilities in the form of a plan view; informing a storage abnormality when the actual storage location and stock condition are different from that displayed i... | 05/26/1998 |
