US3841130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball bat system
Assignee: Reynolds Metals Co
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Filing: 1973-11-20
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Granted: 1974-10-15
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Expires: 1993-11-20
Abstract
Abstract The hollow metal body for a ball bat is made by machining a tapered surface on most of the length of hollow cylindrical metal extruded workpiece, and swaging the machined portion of the workpiece to form the desired outside contour of a ball bat, the wall thickness along the length of the metal body being determined by the balance of the thinning effect of the machining against the thickening effect of the swaging.
Inventors
- 👤 I Scott
- 👤 G Swenck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:01
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
123 words
The method of making a metal body for a ball bat comprising the steps of a. providing a cylindrical hollow metal work piece; b. machining post of the length of the outside of the work piece, thereby reducing its wall thickness to a predetermined extent; and, c. swaging down most of the machined portion of the work piece in successive swaging operations to form two abutting tapering sections, thereby shaping the work piece and increasing the thickness of the wall of the work piece to a predetermined extent where it had been thinned by machining, the offsetting effects of machining and swaging being such as to provide a tapered metal bat body having a predetermined wall thickness from one end to the other.
Claim 2
Independent Claim
123 words
The method of making a metal body for a ball bat comprising the steps of a. providing a cylindrical hollow metal work piece; b. machining post of the length of the outside of the work piece, thereby reducing its wall thickness to a predetermined extent; and, c. swaging down most of the machined portion of the work piece in successive swaging operations to form two abutting tapering sections, thereby shaping the work piece and increasing the thickness of the wall of the work piece to a predetermined extent where it had been thinned by machining, the offsetting effects of machining and swaging being such as to provide a tapered metal bat body having a predetermined wall thickness from one end to the other.
Claim 3
Dependent Claim
45 words
The method of claim 1, wherein a first swaging operation produces a first degree of taper on the outside of the work piece and a second swaging operation produces a lesser degree of taper on the outside of an abutting portion of said work piece.
Claim 4
Dependent Claim
18 words
The method of claim 1, wherein the wall thickness is generally uniform from one end to the other.
Claim 5
Dependent Claim
24 words
The method of claim 1 in which the swaged length portion formed by said two abutting tapering sections is substantially greater than 13 inches.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |