US4014542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bat used in baseball
Assignee: Individual
•
Filing: 1974-03-14
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Granted: 1977-03-29
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Expires: 1994-03-14
Abstract
Abstract This invention relates to a bat of urethane foam used in baseball, which has a metal tube of duralumin at the barrel portion. The metal tube has many apertures therethrough, which are filled with urethane foam to fit the metal tube to the barrel portion because of the expansive quality of the urethane foam. The bat also has an outer layer of a glass fiber cloth which prevents a batter's hands and arms from becoming numb due to the shock caused by batting the ball and transmitted to him through the bat, and also prevents any broken part of the bat from scattering when the bat is broken. The outer layer, moreover, makes the bat sturdy. It is further possible to provide projections on the outer layer to eliminate the possibility of fouling and tipping.
Inventors
- 👤 Yukio Tanikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:32
CPC Classifications
A; A63; A63B; A63B59/00; A63B59/50; A63B59/51; A63B59/52; A63B60/00; A63B60/06; A63B60/08; A63B2102/00; A63B2102/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
122 words
A bat used in baseball, said bat comprising: a main member having a barrel portion for hitting a baseball and a grip portion joined to said barrel portion for holding the bat, said main member being formed from materials selected from the group consisting of urethane foam, wood, or a combination of urethane foam and wood; a metal tubular portion having a plurality of openings therethrough fitted only around said barrel portion of said main member; urethane foam foamed through the openings through said metal tubular portion joining said metal tubular portion to said barrel portion of said main member; glass cloth surrounding said metal tubular portion and said main member; and a coating of synthetic resin paint over said glass cloth.
Claim 2
Dependent Claim
122 words
A bat used in baseball, said bat comprising: a main member having a barrel portion for hitting a baseball and a grip portion joined to said barrel portion for holding the bat, said main member being formed from materials selected from the group consisting of urethane foam, wood, or a combination of urethane foam and wood; a metal tubular portion having a plurality of openings therethrough fitted only around said barrel portion of said main member; urethane foam foamed through the openings through said metal tubular portion joining said metal tubular portion to said barrel portion of said main member; glass cloth surrounding said metal tubular portion and said main member; and a coating of synthetic resin paint over said glass cloth.
Claim 3
Dependent Claim
26 words
A bat as claimed in claim 1 wherein said main member is comprised of urethane foam and has a wooden core longitudinally through said grip portion.
Claim 4
Dependent Claim
31 words
A bat as claimed in claim 1 wherein said main member is comprised of urethane foam and has a wooden core longitudinally through both said grip portion and said barrel portion.
Claim 5
Dependent Claim
26 words
A bat as claimed in claim 1 wherein said glass cloth is strings of glass fiber wound around said metal tubular portion and said main member.
Claim 6
Dependent Claim
28 words
A bat as claimed in claim 1 wherein said glass cloth is a stocking of knitted glass fiber fitted around said metal tubular portion and said main member.
Claim 7
Dependent Claim
16 words
A bat as claimed in claim 1 wherein said metal tubular portion is comprised of duralumin.
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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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |