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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 |
| 7311318 | Troughed skateboard wheels A wheel is provided for a conveyance such as a skateboard. The wheel is generally cylindrical in form with a tread surface defining a portion of the wheel adapted to contact an underlying surface upon which the wheel is rotatably supported. The tread surface include... | 12/25/2007 |
| 7093839 | Hockey stop multi-line roller skate and wheels for use therewith A wheel with an asymmetrical cross-section for use with a roller skate. The wheel also has a tread portion that can be easily and inexpensively replaced. An apparatus for multi-line roller skates that has two or three lines of wheels. The wheels in the center line h... | 08/22/2006 |
| 6953225 | Dual hardness skateboard wheel A multi-element skateboard wheel having at least two different hardness surfaces including a softer center exterior surface and a harder side exterior surface. The softer center surface is the principal weight supporting surface which, because of its lower durometer... | 10/11/2005 |
| 6237960 | Roller-type skiing device for negotiating a slope A roller-type skiing device, in particular a roller ski or a roller skiboard, includes a chassis defining a longitudinal axis and having an underside bounded by an envelope. Supported by the chassis is at least one row with a plurality of wheels which are... | 05/29/2001 |
| 6176553 | Wheel, particularly for rollers skates A wheel for skates comprises a hub which is rotatably associable with a pivot and with which a tread is associated. A plurality of grooved regions are formed in the lateral surfaces of the tread and run gradually toward the median plane of the tread, so a... | 01/23/2001 |
| 6036278 | Multi durometer wheel for in-line skates There is disclosed an improved skate wheel for an in-line skate comprising a hub for rotation about an axis and a plurality of cores of material disposed about the hub to be coaxial therewith, the outer core of material being harder than the inner core to... | 03/14/2000 |
| 6019378 | Inline roller skate and wheel construction Each wheel of an inline roller skate incorporates multiple tires, with a center tire allowing straight-ahead skating and the two side tires allowing maneuvering forces. Leaning the skate such that none of the tires makes good contact with the skating surf... | 02/01/2000 |
| 5901970 | Metal wheels for roller ice skates Novel tempered rust resistant steel wheels for installation on conventional in-line four wheel roller skates, parallel four wheel roller skates, and, in-line five wheel roller skates that convert traditional ground roller skates into ice skates. The novel... | 05/11/1999 |
| 5829757 | Variable traction wheel for in-line roller skate Disclosed is an in-line skate wheel that includes: (a) a braking portion including a high friction surface material having a hardness from about 75 to about 95 Shore A, and a coefficient of friction from about 0.45 to about 1.5; and (b) a skating portion ... | 11/03/1998 |
| 5725284 | Wheel for in-line skates There is disclosed an improved skate wheel for an in-line skate comprising a hub for rotation about an axis and a plurality of layers of material disposed concentrically about the hub, each of the layers consisting of a material having a predetermined dur... | 03/10/1998 |
| 5718499 | Roller blade wheel lighting system A new Roller Blade Wheel Lighting System for increasing the visibility of the user when roller blading in darkness, without requiring an external power source. The inventive device includes a transparent cylindrical plastic rim rotatably secured to a conv... | 02/17/1998 |
| 5527100 | Composite wheel for in-line roller skate In-line roller skates capable of riding at high speed on a skating surface and of being braked by the skater without the need for braking pads or similar expedients for this purpose. Each skate is provided with a set of composite wheels supported for rota... | 06/18/1996 |
| 5411320 | Wheels that provide lateral friction on ice The "WHEELS THAT PROVIDE LATERAL FRICTION ON ICE" consists of a wheel with a set of grooves around its outer exterior circumference. Said outer exterior circumference may be either flat or angled as viewed from a point perpendicular to the center of the a... | 05/02/1995 |
| 5401037 | Composite wheels for in-line roller skates In-line roller skates whose wheels make it possible for a skater to stop without the need for a braking pad or other special expedients for this purpose. Each skate includes a boot to accommodate the skater's foot and a frame secured to the underside of t... | 03/28/1995 |
| 5259632 | Skateboard adapted for use on ice A skateboard, adapted for use on ice, utilizes a blade assembly comprised of a bushing member, a blade member and a body member. The bushing member has an outer surface and an inner surface, the inner surface defining an aperture adapted to receive the sk... | 11/09/1993 |
| 5226673 | Braking assembly and method A braking assembly and method are disclosed for use with wheeled skating apparatus having a plurality of wheels rotatably connected with a support structure, the assembly including a band of relatively resilient material positioned at the outer circumfere... | 07/13/1993 |
| 5129709 | Wheel for roller skate and the like A wheel adapted to be rotated about a normally horizontal axis perpendicular to a normal direction of travel has a hub centered on the axis and a central core body made of a hard material and coaxially surrounding the hub. This core body has an annular ou... | 07/14/1992 |
| 4699432 | Dual material safety wheel A safety wheel has on the surface thereof a tread design comprised of a relatively hard material which defines interstitial spaces, which spaces are filled with a relatively soft material. The overall surface of the resulting safety wheel is substantially... | 10/13/1987 |
| 4208073 | Wheel for skateboards and roller skates The wheel is made up of first and second annular wheel portions comprised respectively of low and high coefficient of friction materials; for example, urethane and rubber. These annular portions are bonded together in coaxial relationship. The outer perip... | 06/17/1980 |
