Retracting Wheel Or Runner Patents (Class 280/9)
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Patent number: 5441285Abstract: A skid attachment for a carrying cart has an arcuate cross-section engageable with a pair of wheels at the front of the cart, and is held in position by the engagement of an edge of the attachment with the underside of the frame of the cart as forward motion of the cart is begun. The wheels rotate about the inner periphery of the attachment during this preliminary movement, in which the attachment simply rolls along the ground a few inches until the contact with the frame is made.Type: GrantFiled: April 19, 1994Date of Patent: August 15, 1995Inventors: Benjamin E. Russell, Jr., David W. Hansen
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Patent number: 5439237Abstract: The ski supports of a snowmobile are each provided with a plurality of wheel assemblies, with each wheel assembly arranged for pivoting relative to the ski support from a first position elevating the wheels above a top surface of each ski support to a second locked position wherein the wheels are directed below the ski supports.Type: GrantFiled: April 13, 1994Date of Patent: August 8, 1995Inventor: Steven A. Kutchie
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Patent number: 5106109Abstract: A cart formed with a concave top surface and a convex bottom surface mounting rollers medially of forward edges of each forward and rear edge and of the cart to permit use of the cart in a rolling or skidding orientation. The cart structure utilizes a plurality of spaced skids projecting below the bottom surface of the cart for enhanced skidding upon various surfaces, such as water, sand, and snow.Type: GrantFiled: April 16, 1991Date of Patent: April 21, 1992Assignee: Walters Kidde Aerospace Inc.Inventors: Tammy J. Tattersall, Daniel M. Floodquist
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Patent number: 5016893Abstract: A collapsible support and transport stand is provided to receive a personal watercraft, such as a jet ski, water scooter, or the like from the back of a pick-up truck, for example, and to transport the personal watercraft into the water over typical beach terrain. The stand includes a cradle upon which the personal watercraft is supported and a plurality of telescoping legs which extend to a pair of skids having a plurality of spring biased retractable wheels. The telescoping legs are maintained in their support position transverse to the cradle by several telescoping cross members which extend therebetween. The cross members are adapted for disassembly to permit the legs to pivot to a stowed position underneath the cradle for ease of storage.Type: GrantFiled: February 12, 1990Date of Patent: May 21, 1991Inventor: Charles R. Hart, Jr.
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Patent number: 4898256Abstract: A crawler unit for coupling to a wheelchair, especially for climbing stairs, comprises an undercarriage having power-driven tracks and an adapter for securing the wheelchair in a rearwardly tilted travelling position. In order to enable the wheelchair user to couple and decouple and maneuver the wheelchair by himself, the adapter which includes a male coupling member for mating engagement with a complementary female coupling member mounted on the wheelchair is connected to the crawler unit through lifting means adapted to be operated by the wheelchair user via actuating or control elements for selectively lifting the wheelchair relative to the crawler unit and lifting the crawler unit while the wheels of the wheelchair remain on the ground, such operation being possible both in position of the wheelchair.Type: GrantFiled: October 19, 1988Date of Patent: February 6, 1990Assignee: Sunwa Sharyo Manufacturing Co., Ltd.Inventor: Max Lehner
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Patent number: 4754832Abstract: A single ski is disclosed for central mounting under a four wheel vehicle, preferably a vehicle having four wheel drive. This single ski is mounted to the underside of the vehicle and includes a jacking mechanism for raising and lowering the ski in parallel relation with respect to the snow covered ground. The single ski extends longitudinally of the vehicle, centrally between the wheels on the left side of the vehicle and the wheels on the right side of the vehicle. The length and width of the ski is sufficient to remove substantially equal weight from both the front and rear tires of the vehicle. The surface area of the ski is sufficient to maintain the depth of the ski at a level no lower than the lowest point of the tires in soft or powder snow. In operation, the ski is lowered a sufficient distance to remove weight evenly from the wheels of the vehicle to an extent that the tires no longer accumulate a blocking drift of snow in their path of advance.Type: GrantFiled: May 20, 1987Date of Patent: July 5, 1988Inventors: John W. Allen, Douglas D. Banghart
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Patent number: 4722537Abstract: The toy horse is characterized by a rigid structure assembled of components with appropriate tenons and mortises. The structure can facilitate shipment and storage. Erection and dismantling of it can provide interllectual training to children and educate them with basic concepts of organization and structure. It further incorporates casters kept in the bottoms of supporters and which can be extended to contact with the ground to provide a mobile toy.Type: GrantFiled: June 30, 1986Date of Patent: February 2, 1988Inventor: Hsu Chau-Pin
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Patent number: 4614349Abstract: A combination hand truck and tool for use in installing floor coverings of the glued-down type, such as carpet or linoleum utilizes the weight of the installer's tool box for pressing the floor covering to the floor, in lieu of a weighted roller ordinarily carried by the installer. Retractable wheels and a pivotable, adjustable position handle enable the device to be used as either a press, riding on glides that contact the floor covering, or as a hand truck for carrying the installer's tools and supplies.Type: GrantFiled: July 13, 1984Date of Patent: September 30, 1986Inventor: Michael D. Wenzel
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Patent number: 4498688Abstract: A skid attachment for a shopping cart, useful in operative position to allow easy movement of the cart over snowy and icy surfaces, as in supermarket parking lots, includes a pair of skid members near the front wheels of the cart, when the attachment is installed, which are selectively movable into inoperative storage position underneath the cart and into operative position with the skid surfaces thereof being lower than the front wheels of the cart, hand operable linkages for moving the skid members selectively into either inoperative or operative position, and fastening means for holding the skid members and the associated linkages to the cart. Preferably, the skid attachment includes stops for limiting the movements of the skid members, locking means for holding them in position and handle or equivalent means so that the skid members may be readily moved into desired positions.Type: GrantFiled: March 23, 1982Date of Patent: February 12, 1985Inventors: Donald N. Walters, Theodore P. Link
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Patent number: 4390151Abstract: A ski mounting assembly for an aircraft landing gear having a ski with a pedestal attached to it to be placed on each side of the landing gear wheel and fork, an extended wheel axle to serve as an axle for the wheel, a mounting for the wheel in the landing gear fork and to serve as a pivotable support for the ski by extending through journals in the ski pedestals, a ski attitude control arm pivotably mounted on one end of the extended wheel axle and provided with a clamp to secure the ski attitude control arm to the landing gear fork, a stop attached to the ski attitude arm so as to act against the ski to limit the downward motion of the ski nose and a spring acting between the ski and the ski attitude control arm to urge the ski against the stop.Type: GrantFiled: February 20, 1981Date of Patent: June 28, 1983Inventor: Richard J. Schneider
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Patent number: 4354390Abstract: A sled for use in tractor pulling contests, and the like, comprising a frame supported on front and rear wheels, a ballast mass supported by the frame, a pan adapted for sliding frictional engagement with the ground, and an articulated linkage mechanism for transfering the weight of the ballast from the wheels to pan. As the sled is pulled, the linkage mechanism, which is driven by rotation of the rear wheels, progressively shifts the weight of the sled from the wheels to the pan, by lowering the pan relative to the frame. The suspension springs for the rear axle have a greater vertical stroke than those for the front. Therefore, although the front wheels may ultimately be completely lifted from the ground during the weight transfer, the rear wheels always contact the ground with a force sufficient to drive the linkage mechanism. suBACKGROUND OF THE INVENTIONTractor pulling contests have become increasingly popular.Type: GrantFiled: June 23, 1980Date of Patent: October 19, 1982Assignee: Northwestern Ohio Tractor Pullers Assoc.Inventor: Robert A. Chamberlain
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Patent number: 4320904Abstract: A shopping cart incorporating a removable skid attachment, useful in operative position to allow easy movement of the cart over snowy and icy surfaces, as in supermarket parking lots, includes a pair of skid members near the front wheels of the cart, when the attachment is installed, which are selectively movable into inoperative storage position underneath the cart and into operative position with the skid surfaces thereof being lower than the front wheels of the cart, hand operable linkages for moving the skid members selectively into either inoperative or operative position, and fastening means for holding the skid members and the associated linkages to the cart. Preferably, the skid attachment includes stops for limiting the movements of the skid members, locking means for holding them in position and handle or equivalent means so that the skid members may be readily moved into desired positions.Type: GrantFiled: January 7, 1980Date of Patent: March 23, 1982Inventors: Donald N. Walters, Theodore P. Link
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Patent number: 4307892Abstract: An assemblage for hand trucks which provides for interchangeable runners and wheels, as desired, to move the hand truck over a particular surface. The assemblage has a support frame which may be releasably secured to the frame of a hand truck and a supporting means which is releasably secured to the support frame to permit movement with respect thereto. The supporting means may be manipulated to rotate runners or wheels into contact with a surface while simultaneously rotating the wheels or runners out of contact with the surface. The support means may be releasably locked in position with respect to the support frame to ensure contact of the wheels or runners with the surface over which the hand truck is moved.Type: GrantFiled: November 26, 1979Date of Patent: December 29, 1981Inventor: Hugh G. Miles
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Patent number: 4291891Abstract: A convertible sled is disclosed for use on snow as well as surfaces devoid of snow. The sled comprises a pair of runners rigidly secured to the underside of the sled and three pivotal wheels. The first, front wheel is secured to a rotatable rod extending longitudinally and centrally under the front portion sled. Linkage means connects this rod to two other rods each longitudinally rotatably disposed adjacent one of the runners. An operating lever easily accessible at the front of the sled and secured to the first named rod serves to pivot all three wheels between a first ground-engaging position with the runners off the ground, and a second inoperative retracted position relative to the runners.Type: GrantFiled: May 2, 1980Date of Patent: September 29, 1981Inventor: Claude Blanchette
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Patent number: 4191391Abstract: The present invention provides a shopping cart of the two-wheel variety wherein an auxiliary sled attachment is provided, said attachment being adapted to be moved from one to the other of two selectable positions and to be retained in either of such positions, said attachment consisting of a sled having a snow engaging surface which in one position will underlie the wheels, and in the other position will be held out of engagement with the sidewalk or street and in substantially parallel coincidence with a side of the cart.Type: GrantFiled: September 1, 1978Date of Patent: March 4, 1980Inventor: Peter J. Dorlini
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Patent number: 4159119Abstract: A combination sleigh and wagon in which, in summertime, the device serves as a wagon while in wintertime the detachable wheels are removed and the device serves as a sleigh in the snow. The central single front wheel of the vehicle is partially rotatable about an axis for steering purposes, while the runners also serve for steering in wintertime by the provision of structure to laterally incline the front portions of the two parallel runners. Thus the front portions of the two runners may be manually angularly oriented relative to the longitudinal axis of the vehicle for steering purposes, while the balance of each runner remains parallel to the longitudinal axis of the vehicle. In general, the runners are disposed along each edge of the body or platform of the device, parallel with the longitudinal axis of the device. More than two runners may be provided in some cases, as for a very wide vehicle. The vehicle also includes at least two other rotatable wheels mounted at the rear of the vehicle.Type: GrantFiled: September 6, 1977Date of Patent: June 26, 1979Inventor: James A. Smith
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Patent number: 4139208Abstract: A cart mounted on two inverted "T" shape runners with wheels collapsibly mounted between the runners and actuated by levers on each side of the cart. The cart has foldable front and rear sides. The wheels are mounted on spaced plates and have means for locking them in raised and lowered positions.Type: GrantFiled: September 12, 1977Date of Patent: February 13, 1979Inventors: George Kaley, Bernadette Kaley
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Patent number: 4122614Abstract: A new ski track mold is disclosed which is capable of forming a new and improved type of ski track for use in Nordic skiing when towed behind a tractor, snowmobile or similar transport vehicle. This invention provides novel means for forming a ski track which has a track plane for each ski substantially perpendicular to the earth's gravitational vector forces regardless of the type of terrain being traversed, as well as novel means for assuring a superior quality ski track with an increased life span.Type: GrantFiled: March 28, 1977Date of Patent: October 31, 1978Inventor: Stanley O. Cheney
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Patent number: 4040638Abstract: A refuse collecting vehicle includes the following features: A rigid frame is provided having a handle at one end and a choice of runners, snow skid or wheel, at the other. The frame includes means for supporting a plastic bag in position to receive refuse. An unitary water-tight cover is provided for the bag which can be swung between bag covering and uncovering positions. Mechanism responsive to operation of the cover causes the bag mouth to be wide open when the cover is in uncovering position and to be closed when the cover is in covering position. The frame is open at one side to facilitate removal of a filled bag and the substitution of an empty one. Provision is made for supporting a filled and closed bag in a carrying position and affixing it to the frame for transportation.Type: GrantFiled: May 3, 1976Date of Patent: August 9, 1977Inventor: Raymond C. Flagg