US3813810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coordination top
Assignee: Individual
•
Filing: 1973-02-16
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Granted: 1974-06-04
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Expires: 1993-02-16
Abstract
Abstract A coordination top comprising a radial surface, rounded rotation surface means centrally thereof, and offset means for imparting rotational movement.
Inventors
- 👤 E Majewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:55
CPC Classifications
A; A63; A63H; A63H1/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
57 words
A coordination top comprising a radial surface, rounded rotation surface means centrally thereof comprising a sphere, the longitudinal axis of said sphere being normal to the plane of said radial surface, one hemisphere of said sphere extending from one side of said radial surface, and the opposite hemisphere extending from the opposite side of said radial surface.
Claim 2
Dependent Claim
57 words
A coordination top comprising a radial surface, rounded rotation surface means centrally thereof comprising a sphere, the longitudinal axis of said sphere being normal to the plane of said radial surface, one hemisphere of said sphere extending from one side of said radial surface, and the opposite hemisphere extending from the opposite side of said radial surface.
Claim 3
Dependent Claim
95 words
A top comprising a flat disc, a rounded body mounted centrally thereof having its longitudinal axis normal to said disc, and mounting means to mount and retain said rounded body in position on said disc comprising a central opening in said disc conforming to the equatorial configuration and dimension of said rounded body, lugs extending inwardly from the peripheral edge of said central opening, and cooperating slots around the periphery of the equator of said rounded body to snugly receive said lugs when said rounded body is inserted into said central opening in said disc.
Claim 4
Dependent Claim
95 words
A top comprising a flat disc, a rounded body mounted centrally thereof having its longitudinal axis normal to said disc, and mounting means to mount and retain said rounded body in position on said disc comprising a central opening in said disc conforming to the equatorial configuration and dimension of said rounded body, lugs extending inwardly from the peripheral edge of said central opening, and cooperating slots around the periphery of the equator of said rounded body to snugly receive said lugs when said rounded body is inserted into said central opening in said disc.
Claim 5
Dependent Claim
114 words
A method of making the top as set forth in claim 2, comprising the steps of selecting a sheet of hardboard, cutting discs therefrom of selected peripheral configuration having a central opening conforming to the equatorial configuration and dimension of said rounded body and having lugs extending inwardly from the peripheral edge of said central opening, blow molding a selected quantity of polyethylene into a rounded body of desired configuration and dimension, and cutting cooperating slots around the periphery of the equator of said rounded body adapted to snugly receive said lugs when said rounded body in inserted into said central opening in said disc, and so inserting said central body in said disc.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |