Seat swivel apparatus
First Claim
1. A seat swivel apparatus comprising:
- a first mounting plate having circular recess formed therein adapted to connect to a seating surface, said first mounting plate having a bore defined therein;
a second mounting plate having a circular recess formed therein adapted to connect to a support structure, said second mounting plate having a bore defined therein;
bearing means located within said recesses for transmitting loads between said first and second mounting plates and for allowing relative rotation between said plates; and
means for rotatably fastening said plates, said fastening means being insertable into each of said bores on said first and second mounting plates,said fastening means having a Belleville spring attached thereto for biasing said mounting plates together, said Belleville spring maintaining a continuous and generally constant force to urge said mounting plates together.
1 Assignment
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Accused Products
Abstract
A seat swivel apparatus includes a first mounting plate rotatively mounted to a second mounting plate. Each of the first and second mounting plates has a circular recess formed therein to define a pair of bearing races which hold bearing means such as a plurality ball bearings. The first and second mounting plates are held together utilizing fastening means that include a Belleville spring to provide a continuous and substantially constant biasing force on the plates to maintain them in proper rolling contact with the ball bearings. Each of the races include two arcuate sidewall portions and a connecting portion between the sidewall portions, the connecting portions being substantially flat to help prevent the bearings from tightening within the races.
25 Citations
16 Claims
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1. A seat swivel apparatus comprising:
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a first mounting plate having circular recess formed therein adapted to connect to a seating surface, said first mounting plate having a bore defined therein; a second mounting plate having a circular recess formed therein adapted to connect to a support structure, said second mounting plate having a bore defined therein; bearing means located within said recesses for transmitting loads between said first and second mounting plates and for allowing relative rotation between said plates; and means for rotatably fastening said plates, said fastening means being insertable into each of said bores on said first and second mounting plates, said fastening means having a Belleville spring attached thereto for biasing said mounting plates together, said Belleville spring maintaining a continuous and generally constant force to urge said mounting plates together. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A seat swivel apparatus comprising:
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a first mounting plate having a circular recess formed therein adapted to connect to a seating surface; a second mounting plate having a circular recess formed therein adapted to connect to a support structure, wherein each of said recesses have two arcuate sidewall portions and a connnecting portion between said sidewall portions, said connecting portion being generally flat; bearing means located within said recesses for transmitting loads between said first and second mounting plates and for allowing relative rotation between said plates; a Belleville spring for biasing said mounting plates together; and means for rotatably fastening said plates, said fastening means further retaining said Belleville spring against either of said plates. - View Dependent Claims (13, 14, 15, 16)
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Specification