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 |
| 7353566 | Adjustable wheel assembly An improved wheel assembly comprises a caster fork, a caster wheel rotatably supported by the caster fork, and a caster swivel post defining an axis about which the caster fork rotates. The caster swivel post is being adapted to rotate about a pivot axis within a cy... | 04/08/2008 |
| 7077220 | Tractor with rear castor wheels A hydrostatic agricultural tractor has front ground wheels mounted on the frame at fixed angles parallel to each other and parallel to a center line of the frame and rear ground wheels mounted on a respective castor, with each of the front ground wheels being driven... | 07/18/2006 |
| 7065827 | Shock absorber structure of a castor wheel A shock absorber structure of a castor wheel is disclosed. The bottom section of a leg is inserted with a mounting tube and the circumferential edge of the leg is mounted with a protective hood. A screw nut is used to lock the mounting tube and the protective hood t... | 06/27/2006 |
| 7017228 | Pneumatic locking swivel caster A pneumatic locking swivel caster comprises a swivel caster and a locking device which may be activated by fluid pressure. The swivel caster may be a dual wheel swivel caster. An improved theatrical prop or scenery element comprises a pneumatic locking swivel caster... | 03/28/2006 |
| 6964083 | Caster for baby carriage A caster for a baby carriage is composed of: a caster holder mounted to a front leg of a baby carriage; a caster column provided at the caster holder and having a flange-shaped portion at its lower end, wherein the caster bearing member is slidably and rotatably mou... | 11/15/2005 |
| 6944910 | Caster wheel assembly with anti-flutter control A caster wheel assembly for a wheeled device, such as a wheelchair, includes a housing suitable for connection to a wheeled device, a caster fork configured to mount a caster wheel for rotation, and a caster bolt connected to the caster fork and inserted into the ho... | 09/20/2005 |
| 6899344 | Multidirectional roller skate device and method of using A multidirectional roller skate device and an associated method of using the device is disclosed. The device includes a foot platform having a plurality of rolling units attached to the bottom of the foot platform. The foot platform may be either a boot for use as a... | 05/31/2005 |
| 6892421 | Oblique angled suspension caster fork for wheelchairs A shock absorption mechanism for a wheelchair includes a caster fork including a first oblique surface and a second horizontally disposed surface, relative to a horizontal plane of travel of the wheelchair. A portion of the second surface includes a curved profile. ... | 05/17/2005 |
| 6874800 | Hospital bed wheel linkage apparatus A patient support including a linkage assembly providing communication between at least one front wheel and at least one rear wheel. ... | 04/05/2005 |
| 6823560 | Buffering structure for wheels A buffering structure for wheels comprises at least a linking plate, a spindle, two concentric rigid hollow ferrules or up, and a kind of firm buffer material. When applying this invention, an outer end of the linking plate is hitched on the wheel shaft while the sp... | 11/30/2004 |
| 6748623 | Chair caster A chair caster in the invention mainly includes a wheel holder, a spindle, a wheel axle, two wheel bodies, two shake-proof washers and two caps. Each of the two wheel bodies is provided with a recessed chamber disposed in an inner side thereof and capable of being f... | 06/15/2004 |
| 6568030 | Caster In a caster which supports a wheel by using via a link 3 a bracket 2 to be fitted to a wheelchair or the like, an end of the link 3 is connected with a rotation axis of the bracket 2 via a rubber member 8 which is twisted and deformed resulting from oscil... | 05/27/2003 |
| 6550101 | Hydraulic constant force caster A caster system wherein a constant force is applied to the caster for load support purposes. A plurality of casters are interconnected by a fluid conduit system and each caster includes an expansible chamber motor for adjusting the vertical position of th... | 04/22/2003 |
| 6532624 | Brake caster A brake caster in the invention mainly includes a wheel holder, a spindle, a stop seat, a brake seat, a stop plate and two wheel bodies. The paddle of the brake seat is capable of being depressed to make the top push-face of the brake seat rotated upwardl... | 03/18/2003 |
| 6532623 | Caster A caster which is mounted in a trolley or the like having a bracket 2 connected to a body of a vehicle; a link 3 connected to rotate on the bracket 2; vehicle wheels 4 connected to rotate on the link 3; and a compressible rubber block 20 which deforms as ... | 03/18/2003 |
| 6530119 | Caster structure A caster structure including a seat body, a linking member, a caster seat and a lower bearing cover. The linking member is integrally formed with an upper bearing cover. The seat body is formed with a differential fixing hole and the top of the linking me... | 03/11/2003 |
| 6499184 | Elastomeric biased caster A caster supporting weight through a biasing device an elastomeric material, such as polyurethane, to elastomerically support the weight transmitted through the caster. The components are concisely related to each other, the elastic material is protected ... | 12/31/2002 |
| 6357077 | Spring loaded caster A spring loaded caster includes a support plate adapted to be affixed to the underside of an article to be transported. Two caster legs depend downwardly from the support plate. The caster legs are spaced apart and preferably substantially parallel with e... | 03/19/2002 |
| 6327742 | Free floating castor A free floating castor includes a wheel assembly mounted to move relative to a vertical axis of rotation at which it is attached to a trolley to provide space for the wheel to move freely within a fixed area. At least one shaft extends perpendicular to th... | 12/11/2001 |
| 6256835 | Caster with a locking mechanism A caster includes a wheel body having a hub portion and an axle extending from the hub portion. Lock engaging members are disposed around the hub portion. An upright mounting frame includes a lower mounting portion journalled to the axle, and an upper mou... | 07/10/2001 |
| 6193249 | Turning mechanism for tandem wheeled vehicles and vehicles employing the same A steering mechanism is provided for tandem wheeled vehicles. The steering mechanism employs casters that are capable of swivelling. The casters are attached to a base member and a pair of resilient members is used to provide control over the degree of sw... | 02/27/2001 |
| 6134748 | Pullman case steering wheel device An automatically retractable swivelling wheels device of a pullman case is disclosed. The swivelling wheels device comprises a bushing, in which a spring retainer is formed on a bottom of a circumferential flange of the bushing, a wheel housing assembly a... | 10/24/2000 |
| 6094846 | Single wheel caster apparatus A single wheel caster apparatus is disclosed for supporting a plow. The apparatus includes a wheel and an axle, the axle extending through the wheel such that the wheel is rotatably supported by the axle. Additionally, a first and a second fork are provid... | 08/01/2000 |
| 5996176 | Free floating castor A free floating castor includes a wheel assembly mounted to move relative to a vertical axis of rotation at which it is attached to a trolley to provide space for the wheel to move freely within a fixed area. In one embodiment, two parallel shafts of a br... | 12/07/1999 |
| 5984333 | Wheelchair which is provided with a swivel castor A wheelchair with adjustable swivel castors is described. The wheelchair includes a mechanism to limit the swivel range of the castors. The swivel range may be limited manually or automatically as a function of the terrain or the speed of the chair.... | 11/16/1999 |
| 5975546 | Lateral sliding roller board A roller board allowing the rider to slide laterally in a manner similar to a snowboard. The roller board is comprised of a platform having four fixed wheels, and two pivoting rollers positioned along the platform's longitudinal axis. The fixed wheels fun... | 11/02/1999 |
| 5943735 | Shopping trolley, a castor for a shopping trolley and a kit of parts for fitting to such a castor A steering assistance device for a castor comprises a cam portion (39) having a lobe (41) which is fixed to the bottom of the fixing bolt of the castor and which is surrounded by a closed portion (43) of a capture device (42). The lobe (41) is engaged in ... | 08/31/1999 |
| 5899475 | Vehicle having wheels and castors A vehicle such as a wheelchair having wheels by which the vehicle is propelled and steered and castors which support a proportion of the vehicle's weight, has its castors provided with biasing means which resists swivelling movement of the castors from th... | 05/04/1999 |
| 5842708 | Device for preventing cart oscillation A device for preventing cart oscillation, wherein the rotation in a horizontal plane of the rear wheel side is controlled by an oscillation controlling member. The rotation in the horizontal place of the rear wheel side is also controlled by a detachable ... | 12/01/1998 |
| 5833252 | Lateral sliding roller board A roller board allowing the rider to slide laterally in a manner similar to a snowboard. The roller board is comprised of a platform having four fixed wheels, and two pivoting rollers positioned along the platform's longitudinal axis. The fixed wheels fun... | 11/10/1998 |
| 5809612 | Anti-Shimmy caster wheel Mounting A assemblage for mounting a caster wheel on a depending stationary post on a wheeled load carrier comprises a body element having a cylindrical chamber concentrically surrounding the support post. The body element has a bracket for mounting a caster wheel... | 09/22/1998 |
| 5762155 | Wheelchair frame and castor assembly A wheelchair frame comprises a base frame part (1, 2) with a plurality of wheels (3, 33), including two front wheels (3), wherein each of said front wheels can be driven by an electromotor (4). The base frame part carries at the back side a castor assembl... | 06/09/1998 |
| 5406675 | Flutter free dual wheel caster assembly An improved dual wheel caster assembly is provided having a limited slip frictional clutch to create rotational coupling between the two wheels, but with sufficient slippage to allow adequate directional maneuverability. The caster has improved resistance... | 04/18/1995 |
| 5355664 | Caster wheel suspension and shaft tensioning system for turf maintenance equipment A rotary mower (22) having an improved castering wheel assembly (39, 92) so as to reduce rotation of the castering wheel (4) about its support shaft (6). In one embodiment, a torsion resistance mechanism (2) is interposed between the shaft (3) and mower f... | 10/18/1994 |
| 5303450 | Caster for use on mobile hospital beds and the like A caster wherein the wheel frame and the wheel can be locked in a first axial position of a post which is installed in an upright support serving to turnably mount the frame. When the post is moved to a second axial position relative to the support, the w... | 04/19/1994 |
| 5221100 | Trailer frame with stabilized caster swivel A cargo trailer for towing behind another vehicle has a cargo container platform and a stabilized caster swivel assembly supporting the cargo container platform. The swivel assembly includes an elongated frame, a caster wheel on a swivel member being rota... | 06/22/1993 |
| 5214823 | Castors with swivel damping To prevent "shimmying", due to uncontrolled swivelling of a castor during non-engagement of its wheel or wheels with the ground, frictional resistance to swivelling is provided. An upper or lower cap or cover for the bearing between the castor body and it... | 06/01/1993 |
| 5167048 | Caster wheel retention device A caster retention device is disclosed that supresses flutter or shimmy of a caster wheel and that is easily adjustable. The device includes a caster stem receiving chamber in which a bushing is disposed. The bushing receives a caster stem assembly that i... | 12/01/1992 |
| 5144717 | Double wheel caster for being rotatably mounted on a leg of a transport carrier A double wheel caster for being rotatably mounted on a leg of a transport carrier includes a support rod having a center portion and opposite first and second end portions. The center portion of the support rod is rotatably positioned within an opening lo... | 09/08/1992 |
| 5140720 | Reciprocal attitude-angle self-differentiating device for pivotable wheels of handtrucks Reciprocal attitude angle self-differentiating device (10) for pivotable wheels (11,12;110) of handtrucks, each of the wheels (11,12;110) being respectively rotatably mounted about a substantially horizontal axis (22,23;220) belonging to a wheel supportin... | 08/25/1992 |
