US4032143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite baseball bat
Assignee: DeSoto Inc
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Filing: 1975-09-29
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Granted: 1977-06-28
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Expires: 1995-09-29
Abstract
Abstract A composite molded baseball bat is provided using a tubular, high yield strength aluminum core surrounded by a foam plastic body having a density of from 30-50 pounds per cubic foot and an integral outer skin. The tubular aluminum core has an outside diameter of from three-quarters to 1 inch and a wall thickness of from 0.062 to 0.125 inch.
Inventors
- 👤 Alvin W. Mueller
- 👤 Robert J. Williams
- 👤 Robert E. Ansel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:44
CPC Classifications
A; A63; A63B; A63B59/00; A63B59/50; A63B59/54; B; B29; B29C; B29C70/00; B29C70/68; B29C70/72; A63B2102/00; A63B2102/18; B29K; B29K2063/00; B29K2075/00; B29K2105/00; B29K2105/04; B29K2105/043; B29L; B29L2031/00; B29L2031/52; B29L2031/5227; Y; Y10; Y10S; Y10S273/00; Y10S273/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
78 words
A baseball bat comprising a tubular, high yield strength aluminum core extending almost the full length of the bat, said core having a diameter of from 3/4" to 1" and a wall thickness of from 0.062" to 0.125", said tubular core having adhered to its entire outer surface a foam plastic body having a density of from 30-50 pounds per cubic foot and an integral outer skin, said aluminum having a yield strength of at least 30,000 p.s.i.
Claim 2
Dependent Claim
78 words
A baseball bat comprising a tubular, high yield strength aluminum core extending almost the full length of the bat, said core having a diameter of from 3/4" to 1" and a wall thickness of from 0.062" to 0.125", said tubular core having adhered to its entire outer surface a foam plastic body having a density of from 30-50 pounds per cubic foot and an integral outer skin, said aluminum having a yield strength of at least 30,000 p.s.i.
Claim 3
Dependent Claim
25 words
A baseball bat as recited in claim 1 in which said tubular aluminum core has a wall thickness in the range of 0.07" to 0.10".
Claim 4
Dependent Claim
21 words
A baseball bat as recited in claim 2 in which said tubular aluminum core has an outside diameter of approximately 7/8".
Claim 5
Dependent Claim
21 words
A baseball bat as recited in claim 3 in which said tubular aluminum core has a wall thickness of approximately 0.083".
Claim 6
Dependent Claim
25 words
A baseball bat as recited in claim 1 in which the plastic of said foam plastic body is pigmented in an amount of from 1-30%.
Claim 7
Dependent Claim
24 words
A baseball bat as recited in claim 5 in which the plastic of said foam plastic body is a thermosetting resin in cured condition.
Claim 8
Dependent Claim
19 words
A baseball bat as recited in claim 6 in which said plastic body is constituted by a polyurethane foam.
Claim 9
Dependent Claim
23 words
A baseball bat as recited in claim 1 in which said foam body has a density of approximately 40 pounds per cubic foot.
Claim 10
Dependent Claim
38 words
A baseball bat as recited in claim 1 in which said bat has a length of from about 30 to about 40 inches, and said aluminum tube extends from 90% to 99% of the length of the bat.
Claim 11
Dependent Claim
24 words
A baseball bat as recited in claim 9 in which said aluminum tube extends from 95% to 98% of the length of the bat.
Claim 12
Dependent Claim
95 words
A baseball bat comprising a tubular, high yield strength aluminum core extending almost the full length of the bat, said core having a diameter of from 3/4" to 1" and a wall thickness of from 0.062" to 0.125", said tubular core having adhered to its entire outer surface a foam plastic body having a density of from 30-50 pounds per cubic foot and an integral outer skin, said aluminum having a yield strength of at least 30,000 p.s.i., and said tubular core being hollow and closed with a plug on at least one end thereof.
Claim 13
Dependent Claim
95 words
A baseball bat comprising a tubular, high yield strength aluminum core extending almost the full length of the bat, said core having a diameter of from 3/4" to 1" and a wall thickness of from 0.062" to 0.125", said tubular core having adhered to its entire outer surface a foam plastic body having a density of from 30-50 pounds per cubic foot and an integral outer skin, said aluminum having a yield strength of at least 30,000 p.s.i., and said tubular core being hollow and closed with a plug on at least one end thereof.
Claim 14
Dependent Claim
100 words
A baseball bat comprising a tubular, high yield strength aluminum core extending almost the full length of the bat, said core having a diameter of from 3/4" to 1" and a wall thickness of from 0.062" to 0.125", said tubular core having adhered to its entire outer surface a foam plastic body having a density of from 30-50 pounds per cubic foot and an integral outer skin, said aluminum having a yield strength of at least 30,000 p.s.i., and said tubular core is filled with foam plastic having the same range of density as the foam plastic of said body.
Claim 15
Dependent Claim
100 words
A baseball bat comprising a tubular, high yield strength aluminum core extending almost the full length of the bat, said core having a diameter of from 3/4" to 1" and a wall thickness of from 0.062" to 0.125", said tubular core having adhered to its entire outer surface a foam plastic body having a density of from 30-50 pounds per cubic foot and an integral outer skin, said aluminum having a yield strength of at least 30,000 p.s.i., and said tubular core is filled with foam plastic having the same range of density as the foam plastic of said body.
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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) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |