Spring Suspension Patents (Class 280/47.22)
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Patent number: 9120499Abstract: Embodiments relate to a power assisted wheelbarrow. The wheelbarrow includes a dumping pan and a frame assembly in contact with the dumping pan. The frame assembly includes handles, a dump brace, one or more dumping pan supports and a resting support. The wheelbarrow also includes an electrical control assembly positioned in proximity to the handles, a wheel assembly including an axel positioned transversely between two wheels, an electrical motor assembly positioned in contact with the axel and in electrical contact with the electrical control assembly, a power supply supported by the frame assembly in electrical contact with the electrical control assembly and electrical motor assembly. Wherein the dump brace includes a curvature of about ninety degrees such that when a user dumps the contents of the dumping pan, the dump brace rolls into contact with the ground and prevents the dumping pan from contacting the ground.Type: GrantFiled: February 18, 2014Date of Patent: September 1, 2015Assignee: MICHEL SALES CO., INC.Inventor: Charles J. Michel, Jr.
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Patent number: 7740250Abstract: The invention relates to a light vehicle such as a golf caddie which includes a body and at least two wheels that are respectively connected to the body by first and second axles. The axles can be pivoted in a first position in which they are tilted against the body and in a second position in which they extend away from the body, where the second position is defined as the driving position of the vehicle. At least one spring acts on the body and on the axles, maintaining the driving position of the axles only by the elastic force thereof, without additional transversal supports and bracing.Type: GrantFiled: December 13, 2004Date of Patent: June 22, 2010Assignee: Thermoplastik Erich Muller GmbHInventors: Erich Müller, Dieter Bulling
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Publication number: 20100078906Abstract: A suspension system for a wheeled conveyance includes a swing arm coupled to be pivotally mounted to a part of wheeled conveyance. The swing arm has one end thereof coupled to one end of an extensible biasing means and the other end of extensible biasing means configured to be coupled to a further part of wheeled conveyance. The other side of swing arm has a wheel mount for a wheel of wheeled conveyance. The swing arm having its pivot point between said one end and said other side of said swing arm.Type: ApplicationFiled: September 30, 2009Publication date: April 1, 2010Inventors: Allen Clover Pilgrim, Michael Glenn Pilgrim
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Patent number: 7255355Abstract: A portable collapsible stand includes first, second, and third support frames, a work surface frame, and a telescoping strut pivotably connected to the first and work surface frames. The second frame projects perpendicularly from a lower portion of the first frame. A first end of the third frame is rotatably connected to an upper portion of the first frame such that the third frame pivots from a first parallel position to a second perpendicular position with respect to the first frame. An upper portion of the work surface frame is rotatably connected to the upper portion of the first frame. In operation, the stand can assume a collapsed position in which the first, third and work surface frames are generally parallel, and an operating position in which the third frame and first frame are perpendicular and the work surface frame and surface supporting the stand are parallel.Type: GrantFiled: January 3, 2005Date of Patent: August 14, 2007Assignee: MK Diamond Products, Inc.Inventors: John Chisholm, Shawn Tsung, Paulo Carrolo
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Patent number: 7121563Abstract: A golf cart front-wheel collapsing device includes two parallel lower tubes, two stationary annular gears, a rotary cylindrical gear, a switch and a front wheel. The lower tubes are fixed under a golf cart frame, having a lower end combined with each stationary annular gear, with the cylindrical gear located between the stationary annular gears, and with a coil spring located respectively between each stationary annular gear and the cylindrical gear. The switch is positioned in one of the stationary gears for securing other components in place and operated to engage and disengage the stationary gears with and from the cylindrical gear, letting the front wheel removably combined with the cylindrical gear able to be expanded or folded for collapsing this device, also adjusting the front-wheel's angle to suit to users of different heights.Type: GrantFiled: March 22, 2005Date of Patent: October 17, 2006Assignee: Unique Products & Design Co., Ltd.Inventor: Gordon Liao
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Patent number: 6607201Abstract: A swivel wheel assembly includes a wheel axle, and a vehicle wheel rotatably mounted on the wheel axle. A shock-absorbing wheel fork is secured to opposite ends of the wheel axle and includes first and second elongated spaced-apart support arms. A pivot pin extends through pin openings formed with proximal ends of the first and second support arms. A base is carried by the pivot pin, and is adapted for pivoting movement about an axis defined by the pivot pin. An adjustable shock absorber dampens pivoting movement of the base relative to the vehicle wheel, thereby absorbing the energy of sudden shocks to the vehicle wheel during use.Type: GrantFiled: January 2, 2002Date of Patent: August 19, 2003Inventor: Bill W. Marshburn
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Patent number: 6409190Abstract: A skate cart includes a board with a rear wheel connected to a rear end of the board and a head tube connected to a front end of the board. A steerer tube rotatably extends through the head tube and a fork member is located on a lower end of the head tube. Two plates are respectively pivotably connected to two sides of the fork member and a front wheel is connected between the two plates. A spring is connected between the plate and the side of the fork member the same side of the front wheel. The front wheel together with the two plates move toward the head tube by compressing the springs so as to absorb vibration from the road.Type: GrantFiled: May 15, 2000Date of Patent: June 25, 2002Inventor: Shui-Te Tsai