Energy storing starter assembly in Husqvarna patent

uspatent-7191752.gifAn energy storing starter assembly comprising a pulley, a hub and a buffering component. The buffering component provides a resilient connection between the pulley and the hub, and is designed to store and transmit energy between the pulley and the hub. The ends of the buffering component are further designed to be interchangeable, such that either end of the buffering component may be received by either the hub or the pulley.

Patent Number: United States Patent 7,191,752
Date of Patent: March 20, 2007


SUMMARY OF THE INVENTION

In accordance with one aspect of the present invention, provided is an energy storing starter assembly comprising a pulley, a hub and a buffering component. The buffering component provides a resilient connection between the pulley and the hub, and is designed to store and transmit energy between the pulley and the hub. The ends of the buffering component are further designed to be interchangeable, such that either end of the buffering component may be received by either the hub or the pulley.

In accordance with another aspect, provided is an energy storing starter assembly comprising a pulley, a hub, and a buffering component. The pulley and hub are each provided with respective inclined support surfaces. The buffering component provides a resilient connection between the pulley and the hub, and is designed to store and transmit energy between the pulley and the hub. The buffering component is provided with a first portion that mates with the support surface of the pulley, and a second portion that mates with the support surface of the hub.

In accordance with yet another aspect of the present invention, provided is an energy storing starter assembly comprising a pulley, a hub, and a buffering component. The pulley is provided with a center post and is adapted for receiving a pull rope. The hub is provided with a cage and is adapted for releasably engaging an engine. The buffering component provides a resilient connection between the pulley and the hub and is designed to store and transmit energy between the pulley and the hub. One or both of the center post and the cage are adapted for restricting the diameter of the buffering component in one direction when the buffering component is storing a substantial amount of energy, and the cage is adapted for restricting the diameter of the buffering component in another direction when the buffering component is storing a substantial amount of energy.

In accordance with still another aspect, provided is an energy storing starter assembly comprising a pulley, a hub, and a buffering component. The pulley is provided with a center post and a first inclined surface, and is adapted for receiving a pull rope. The hub is provided with a cage and a second inclined surface, and is adapted for releasably engaging an engine. The buffering component is designed to store and transmit energy between the pulley and the hub. The buffering component is provided with a first portion and a second portion, where each portion is adapted to interchangeably mate with either the first inclined surface of the pulley or the second inclined surface of the hub. The buffering component possesses a diameter that varies with respect to applied loading. One or both of the center post and the cage are adapted for restricting the diameter of the buffering component in one direction when the buffering component is storing a substantial amount of energy, and the cage is adapted for restricting the diameter of the buffering component in another direction when the buffering component is storing a substantial amount of energy.

In accordance with an additional aspect of the present invention, provided is an energy storing starter assembly comprising a pulley, a hub, and a torsion spring. The pulley is provided with a center post and a first inclined surface, and is adapted for receiving a pull rope. The hub is provided with a cage and a second inclined surface, and is adapted for releasably engaging an engine. The torsion spring provides a resilient connection between the pulley and the hub, and is designed to store and transmit energy between the pulley and the hub. The torsion spring is provided with a first portion, a second portion, a first tail, a second tail, and an inner and outer diameter that vary with respect to applied loading. The first and second portions of the torsion spring are adapted to interchangeably mate with the respective first and second inclined surfaces of the pulley and the hub, such that the first and second portions lie substantially flat against the respective inclined surfaces of the pulley and the hub. Further, the first and second tails of the torsion spring are adapted to be interchangeably received in respective holes of the pulley and the hub. One or both of the center post and the cage are adapted for restricting the inner diameter of the torsion spring when the torsion spring is storing a substantial amount of energy, and the cage is adapted for restricting the outer diameter of the torsion spring when the torsion spring is storing a substantial amount of energy.

In accordance with a further aspect of the present invention, provided is an engine assembly comprising an energy storing starter assembly and an engine. The energy storing starter assembly includes a pulley, a hub, and a buffering component. The buffering component provides a resilient connection between the pulley and the hub, and is designed to store and transmit energy between the pulley and the hub. The engine optionally includes a spark system adapted to provide a retarded spark during starting to enable a user to more easily start the engine using the energy storing starter assembly.

In accordance with another aspect of the present invention, provided is an energy storing starter assembly comprising a pulley, a hub, and a buffering component. The buffering component provides a resilient connection between the pulley and the hub, and is designed to store and transmit energy between the pulley and the hub. The hub can be comprised of a more durable material than the pulley.

In accordance with yet another aspect of the present invention, provided is an energy storing starter assembly comprising a pulley, a hub, and a plurality of buffering components. Each buffering component provides a resilient connection between the pulley and the hub, and is designed to store and transmit energy between the pulley and the hub.

Source: uspto.gov


March 2007

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