US3801097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable pool table with ball bearing braking structure
Assignee: DERHEI V VAN
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Filing: 1972-09-21
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Granted: 1974-04-02
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Expires: 1992-09-21
Abstract
Abstract A rotatable, round pool table pivoted at the center on a spindle and supported by a plurality of ball bearings which because of a three-point housing support of the balls held therein also provide a braking action against a fixed base. The playing surface of the table is pentagonally shaped, flat and interrupted by depressed, irregular shaped pockets. Additionally, the table has an elevated edge to form the rear enclosure for each of the pockets.
Inventors
- 👤 Derhei V Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:14
CPC Classifications
A; A63; A63D; A63D15/00; A63D15/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
An improved rotatable, round pool table being pivoted on a centrally located spindle and supported by a plurality of ball bearings against a fixed base, said table having a polygonal, flat playing surface that is interrupted by a plurality of openings with pockets integral with said surface, the improvement consisting of: a. Each of said pockets being depressed and irregular in shape and having a cusp depression which intersects one of said openings at its midpoint, b. A divider situated at the bottom of each of said pockets and centered on one of said openings, and c. said ball bearings each including a housing which retains at least one ball therein, said housing comprising a unitary member having two retainer portions which contact said ball substantially below the mid-line of said ball, said member further having a friction portion which contacts said ball above said mid-line such that said retainer portion bias said ball against said friction portion so as to provide a braking system for said table.
Claim 2
Dependent Claim
168 words
An improved rotatable, round pool table being pivoted on a centrally located spindle and supported by a plurality of ball bearings against a fixed base, said table having a polygonal, flat playing surface that is interrupted by a plurality of openings with pockets integral with said surface, the improvement consisting of: a. Each of said pockets being depressed and irregular in shape and having a cusp depression which intersects one of said openings at its midpoint, b. A divider situated at the bottom of each of said pockets and centered on one of said openings, and c. said ball bearings each including a housing which retains at least one ball therein, said housing comprising a unitary member having two retainer portions which contact said ball substantially below the mid-line of said ball, said member further having a friction portion which contacts said ball above said mid-line such that said retainer portion bias said ball against said friction portion so as to provide a braking system for said table.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |