US4124117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for repressuring tennis and similar play balls
Assignee: Individual
•
Filing: 1977-10-14
•
Granted: 1978-11-07
•
Expires: 1997-10-14
Abstract
Abstract Apparatus for repressuring a tennis ball or similar play ball, which has lost a portion of its initial inflation pressure, in which a container or enclosure for the ball contains a chemical and a suitable fluid that reacts with the chemical to generate a gas at atmospheric pressure capable of diffusing through the permeable elastomeric material of the ball to elevate the total pressure within the ball toward its initial pressure value.
Inventors
- 👤 Marion F. Rudy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:45
CPC Classifications
B; B01; B01J; B01J7/00; B01J7/02; A; A63; A63B; A63B39/00; A63B39/02; A63B39/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
95 words
Apparatus for repressuring hollow permeable plays balls inflated by a first gaseous medium to above atmospheric pressure, comprising a container for receiving one or more of the balls, the interior of said container being at atmospheric pressure, and a means for providing a second gaseous medium in said container externally of one or more of the balls, the second gaseous medium being capable of diffusing through said one or more permeable balls to increase the pressure therein, said means being at atmospheric pressure and said second gaseous medium being differemt from said first gaseous medium.
Claim 2
Dependent Claim
95 words
Apparatus for repressuring hollow permeable plays balls inflated by a first gaseous medium to above atmospheric pressure, comprising a container for receiving one or more of the balls, the interior of said container being at atmospheric pressure, and a means for providing a second gaseous medium in said container externally of one or more of the balls, the second gaseous medium being capable of diffusing through said one or more permeable balls to increase the pressure therein, said means being at atmospheric pressure and said second gaseous medium being differemt from said first gaseous medium.
Claim 3
Dependent Claim
48 words
Apparatus as defined in claim 1, said second gaseous medium being such that its rate of diffusion from said container into said one or more balls is greater than the rate of diffusion of said first gaseous medium through said one or more balls to the exterior thereof.
Claim 4
Dependent Claim
14 words
Apparatus as defined in claim 1, said second gaseous medium being heavier than air.
Claim 5
Dependent Claim
13 words
Apparatus as defined in claim 1, said second gaseous medium being carbon dioxide.
Claim 6
Dependent Claim
24 words
Apparatus as defined in claim 1, said means for providing said second gaseous medium being reactive chemicals in said container externally of said balls.
Claim 7
Dependent Claim
29 words
Apparatus as defined in claim 5, one of said chemicals being a carbonate, another of said chemicals being water capable of reacting with said carbonate to produce carbon dioxide.
Claim 8
Dependent Claim
11 words
Apparatus as defined in claim 6, said carbonate being sodium bicarbonate.
Claim 9
Dependent Claim
20 words
Apparatus as defined in claim 5 a sponge in said container adapted to be moistened with one of said chemicals.
Claim 10
Dependent Claim
54 words
Apparatus as defined in claim 5, one of said chemicals being at the bottom portion of said container, a perforate member in said container above said one chemical to separate said one or more balls from said one chemical, and means for supporting another of said chemicals in the upper portion of said container.
Claim 11
Dependent Claim
22 words
Apparatus as defined in claim 9, said container including a removable top, said support means comprising a sponge secured to said top.
Claim 12
Dependent Claim
20 words
Apparatus as defined in claim 10, said one chemical including sodium bicarbonate, said another chemical being water moistening said sponge.
References Cited (Backward Citations)
US1207813A
Cited
US1755017A
Cited
US1909013A
Cited
US2270593A
Cited
US2719660A
Cited
US3559562A
Cited
US3741378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |