Patent US4025377A successfully refreshed from Google Patents.
US4025377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a baseball bat
Assignee: Individual
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Filing: 1974-10-17
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Granted: 1977-05-24
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Expires: 1994-10-17
Abstract
Abstract A method of producing a baseball bat in which the barrel or hitting portion of the bat is molded from synthetic resin and is affixed to a wooden grip or handle portion. An apertured metal tube is fitted over the barrel portion and synthetic resins are foamed through the apertures to bind the metal tube to the barrel portion. The synthetic resin is further smoothed over the entire metal tube and barrel portion. Then, a winding of glass fibers or a stocking of knitted glass fibers may be wound or fitted over the metal tube and barrel portion and painted with a synthetic resin paint which is allowed to permeate the fibers. The synthetic resin may be urethane foam, and the metal duralumin, and the windings or knitted stocking may have a textured surface which will enhance the ability of the bat to prevent foul balls.
Inventors
- 👤 Yukio Tanikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:43
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/68; B29C70/84; A; A63; A63B; A63B59/00; A63B59/50; A63B60/00; A63B60/06; A63B60/08; B29C37/00; B29C37/0078; B29C37/0082; B29C37/0085; B29C70/02; B29C70/021; B29C70/023; B29C70/04; B29C70/26; A63B2102/00; A63B2102/18; B29C53/00; B29C53/56; B29C53/58; B29K; B29K2075/00; B29K2105/00; B29K2105/04; B29K2105/06; B29K2105/08; B29K2105/0809; B29K2105/0836; B29K2309/00; B29K2309/08; B29K2705/00; B29K2711/00; B29K2711/14; B29L; B29L2031/00; B29L2031/52; B29L2031/5227
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
A method of producing a baseball bat comprising the steps of: molding a main bat member having a barrel portion for hitting a baseball and a grip portion integral with said barrel portion from foamable synthetic resin around a wooden core longitudinally through at least said grip portion; surrounding and fitting to said barrel portion an apertured metal tube; foaming synthetic resin of the same type as comprises said main bat member through the apertures in said apertured metal tube and smoothing said synthetic resin over said metal tube and said barrel portion; wrapping said synthetic resin covered metal tube and barrel portion with strings of chemical fibers; and spreading a coating of synthetic resin paint over said wrapping of chemical fiber strings and allowing said paint to permeate therethrough.
Claim 2
Independent Claim
130 words
A method of producing a baseball bat comprising the steps of: molding a main bat member having a barrel portion for hitting a baseball and a grip portion integral with said barrel portion from foamable synthetic resin around a wooden core longitudinally through at least said grip portion; surrounding and fitting to said barrel portion an apertured metal tube; foaming synthetic resin of the same type as comprises said main bat member through the apertures in said apertured metal tube and smoothing said synthetic resin over said metal tube and said barrel portion; wrapping said synthetic resin covered metal tube and barrel portion with strings of chemical fibers; and spreading a coating of synthetic resin paint over said wrapping of chemical fiber strings and allowing said paint to permeate therethrough.
Claim 3
Dependent Claim
27 words
A method as claimed in claim 1, wherein: said synthetic resin is urethane foam; said wooden core is balsam wood; and said chemical fibers are glass fibers.
Claim 4
Dependent Claim
32 words
A method as claimed in claim 1, wherein: said strings of chemical fibers wrapped about the surface of said metal tube and said barrel portion form projections rising above the surface thereof.
Claim 5
Dependent Claim
36 words
A method as claimed in claim 1, wherein: said strings of chemical fibers wrapped around said metal tube and said barrel portion are in the form of a knitted stocking covering said tube and barrel portion.
Claim 6
Dependent Claim
25 words
A method as claimed in claim 4, wherein: said stocking is knitted from said strings of chemical fibers with projections rising above the surface thereof.
References Cited (Backward Citations)
CA727492A
Cited
US805132A
Cited
US3093162A
Cited
US3367656A
Cited
US3336426A
Cited
US3265401A
Cited
US3353258A
Cited
US3727295A
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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) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |