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Pivotal roller mechanism

  • US 6,594,856 B1
  • Filed: 03/07/2002
  • Issued: 07/22/2003
  • Est. Priority Date: 03/07/2002
  • Status: Expired due to Fees
First Claim
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1. A fixed pivotal retractable roller mechanism that statically supports an item upon a support surface in an inoperative state and supports the item to roll along the support surface in an operative state, comprising:

  • (a) a housing having a symmetrically located axis;

    (b) a swingarm fixed pivot frame that is pivotally engaged with said housing, said swingarm fixed pivot frame having a pivotal movement that is relative to said housing, said swingarm fixed pivot frame having an inoperative position state wherein said swingarm fixed pivot frame is pivoted to allow said housing to rest on and statically contact the support surface and an operative position state wherein said swingarm fixed pivot frame is pivoted from the inoperative position state to allow said housing to separate from the support surface;

    (c) a spring element disposed between said housing and said swingarm fixed pivot frame to bias said swingarm fixed pivot frame toward the operative position state; and

    (d) a non castor wheel rotatably mounted in said swingarm fixed pivot frame, said roller element disposed to only roll bidirectionally along the support surface when said swingarm fixed pivot frame is in the operative position state such that said housing is not in contact with the support surface, said wheel having a rotational axis perpendicular to and intersecting the housing axis.

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