US4093218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular ball rebound apparatus
Assignee: Individual
•
Filing: 1976-11-26
•
Granted: 1978-06-06
•
Expires: 1996-11-26
Abstract
Abstract A modular ball rebound apparatus to assist a beginner or a serious tennis player to improve his or her game, the apparatus being comprised of a plurality of panels for removable mounting on an easel which is adjustable to vary the angle of inclination of the panels to vary the speed, bounce and elevation of the return of a ball after striking one of the panels, the surfaces of which are coated with an energy absorbing material to control the speed of the return.
Inventors
- 👤 Samuel A. Burchers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:57
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/38; A63B69/0097; A63B2209/00; A63B2210/00; A63B2210/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A portable ball rebound apparatus comprising at least three ball rebound panels each having a planar surface of a shock absorbing material, means to removably support said rebound panels, said means to support said rebound panels comprising an easel including a pair of opposed, spaced apart front legs interconnected by a plurality of transverse parallel rails of a length to removably support said three rebound panels, and a pair of side rear legs hingedly connected at their upper ends to the respective front legs, means to adjust said means to support in a manner so as to selectively position said planar surface at various selective angles of inclination to the vertical, each of said rebound panels comprising a rigid backing sheet with a cellular synthetic material bonded thereto comprising shock absorbing material, and wherein said plurality of transverse parallel rails comprises a bottom rail fixed between the bottom ends of said front legs, each of said rebound panels being notched across its bottom edge in a manner so as to fit behind and on top of said bottom rail, and intermediate and top rails fixed between said front rails in positions to supportingly engage the back of each of said rebound panels.
Claim 2
Dependent Claim
202 words
A portable ball rebound apparatus comprising at least three ball rebound panels each having a planar surface of a shock absorbing material, means to removably support said rebound panels, said means to support said rebound panels comprising an easel including a pair of opposed, spaced apart front legs interconnected by a plurality of transverse parallel rails of a length to removably support said three rebound panels, and a pair of side rear legs hingedly connected at their upper ends to the respective front legs, means to adjust said means to support in a manner so as to selectively position said planar surface at various selective angles of inclination to the vertical, each of said rebound panels comprising a rigid backing sheet with a cellular synthetic material bonded thereto comprising shock absorbing material, and wherein said plurality of transverse parallel rails comprises a bottom rail fixed between the bottom ends of said front legs, each of said rebound panels being notched across its bottom edge in a manner so as to fit behind and on top of said bottom rail, and intermediate and top rails fixed between said front rails in positions to supportingly engage the back of each of said rebound panels.
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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) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |