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US3801097A Expired / Lapsed US ⏱️ 0.0 years remaining

Rotatable pool table with ball bearing braking structure

Assignee: DERHEI V VAN
•
Filing: 1972-09-21
•
Granted: 1974-04-02
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Expires: 1992-09-21
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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.

References Cited (Backward Citations)

US691452A Cited
US739717A Cited
US803520A Cited
US895786A Cited
US901169A Cited
GB191124059A Cited
AT109242B Cited
US1859352A Cited
US2511147A Cited
US2623749A Cited

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

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