US4116252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing baseball bats
Assignee: Individual
•
Filing: 1977-10-03
•
Granted: 1978-09-26
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Expires: 1997-10-03
Abstract
Abstract A method and apparatus for producing baseball bats which have high surface hardness and are hardly broken, and said method comprises the steps of: forming a baseball bat having a diameter somewhat larger than the prescribed dimension; impregnating thermosetting resin into said baseball bat; and treating said impregnated bat with heat and pressure by using a set of molds consisting of three or more of divided mold sections.
Inventors
- 👤 Yosaku Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:59
CPC Classifications
A; A63; A63B; A63B59/00; A63B59/50; A63B59/52; A63B2102/00; A63B2102/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
A method of producing baseball bats which comprises the steps of: forming a wood baseball bat having an initial diameter somewhat larger than the prescribed dimension; impregnating thermosetting resin into said baseball bat sufficiently to effect hardening to withstand heavy impact in the finished product; treating said impregnated bat with heat at about 100° to 120° C and pressure in a mold comprising at least three divided mold sections, said method including intermittent partial rotation in said mold with increased pressure; and thereafter maintaining said bat in said mold at a further increased pressure for a predetermined period.
Claim 2
Independent Claim
98 words
A method of producing baseball bats which comprises the steps of: forming a wood baseball bat having an initial diameter somewhat larger than the prescribed dimension; impregnating thermosetting resin into said baseball bat sufficiently to effect hardening to withstand heavy impact in the finished product; treating said impregnated bat with heat at about 100° to 120° C and pressure in a mold comprising at least three divided mold sections, said method including intermittent partial rotation in said mold with increased pressure; and thereafter maintaining said bat in said mold at a further increased pressure for a predetermined period.
Claim 3
Dependent Claim
43 words
A method as set forth in claim 1, wherein said partial rotation is about 60° occurring three to five times; said increased pressure is about 100 to 150 kg/cm 2 and said further increased pressure is about 150 to 200 kg/cm 2 .
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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) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |