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US4056267A Expired / Lapsed US ⏱️ 0.0 years remaining

Die cast bat with rod

Assignee: St Louis Diecasting Corp
•
Filing: 1976-05-11
•
Granted: 1977-11-01
•
Expires: 1996-05-11
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Abstract

Abstract A foam filled die cast metal baseball and softball bat has an all metal skin welded into a unit. The bat is formed by die casting the cylindrical handle and barrel of the bat in one piece and by welding an end cap to the cylindrical barrel to form the unitary skin structure of the bat. A foaming, sound-deadening and strengthening plastic material is then introduced into the hollow interior of the bat through an opening in the handle portion of the bat. The added material foams to fill the interior with a reinforcing semi-rigid foam. The bat has a steel safety rod embedded in the foam center of the bat. The end cap structure is formed of a roughly hemispherical cap and has a sleeve which fits into the interior of the barrel end of the bat. A shoulder on the cap abuts the bat end and extends outwardly radially past the periphery of the bat. The cap is joined to the barrel portion by resistance welding in a rotating lathe under an inert gas atmosphere.

Inventors

  • 👤 George H. Krieger

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 16:10
CPC Classifications
A; A63; A63B; A63B59/00; A63B59/50; A63B59/56; A63B60/00; A63B60/06; A63B60/08; A63B2102/00; A63B2102/18; A63B2102/182; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49888

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 132 words
A die cast porous metal bat having a unitary skin and a foam center, the major portion of the bat being an elongated die cast porous metal blank having a handle and a barrel, the remaining portion being a die cast porous metal cap, the cap and blank being joined at the barrel end of the blank and fixed together by a substantially non-porous weld seam, the cap portion having a sleeve which projects into the interior of the blank beyond the weld seam and lies closely adjacent to the interior of the blank and reinforces the barrel end of the blank, the handle end of the bat having walls defining an opening into the interior of the bat, and the interior of the bat being filled with a resilient foam material.
Claim 2
Dependent Claim 132 words
A die cast porous metal bat having a unitary skin and a foam center, the major portion of the bat being an elongated die cast porous metal blank having a handle and a barrel, the remaining portion being a die cast porous metal cap, the cap and blank being joined at the barrel end of the blank and fixed together by a substantially non-porous weld seam, the cap portion having a sleeve which projects into the interior of the blank beyond the weld seam and lies closely adjacent to the interior of the blank and reinforces the barrel end of the blank, the handle end of the bat having walls defining an opening into the interior of the bat, and the interior of the bat being filled with a resilient foam material.
Claim 3
Dependent Claim 16 words
The bat of claim 1 wherein the bat is coated with a hard, smooth coating material.
Claim 4
Dependent Claim 16 words
The bat of claim 1 wherein the bat handle is coated with a resilient coating material.
Claim 5
Dependent Claim 13 words
The bat of claim 1 wherein the bat has an internal reinforcing means.
Claim 6
Dependent Claim 25 words
The bat of claim 1 wherein the bat has an elongated reinforcing rod embedded in the resilient foam material and extending longitudinally within the bat.
Claim 7
Dependent Claim 15 words
The bat of claim 5 wherein the weld is a substantially non-porous multiple pass weld.
Claim 8
Dependent Claim 16 words
The bat of claim 5 wherein the reinforcing rod has an anchoring eyelet at an end.
Claim 9
Dependent Claim 24 words
The bat of claim 1 wherein the weld seam has a smooth profile contiguous with the major portion of the bat and the cap.
Claim 10
Dependent Claim 15 words
The bat of claim 1 wherein the weld is a substantially non-porous multiple pass weld.

References Cited (Backward Citations)

US1499128A Cited
US1611858A Cited
US1620728A Cited
US1950342A Cited
US2101714A Cited
US3224769A Cited
US3216727A Cited
US3228687A Cited
DE2106800A1 Cited
US3801098A Cited
US3807213A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-10-31 1981-05-02 1981-11-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-10-31 1985-05-02 1985-11-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-10-31 1989-05-02 1989-11-01 $7700.00 Window Closed / Lapsed

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