Patent US4819935A successfully refreshed from Google Patents.
US4819935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Training bat for ball games
Assignee: DIRX Co
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Filing: 1987-12-02
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Granted: 1989-04-11
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Expires: 2007-12-02
Abstract
Abstract A training bat for ball games is shown as including a handle, a ballast, and a ballast adjustment structure. The ballast adjustment structure further includes an adjustment stem attached to the handle, and ballast attachment structure connecting the ballast to the adjustment stem. The handle, stem and ballast are attached coaxially to one another, and the adjustment stem includes external thread convolutions formed along its axial length adapted to provide selective adjustability of the ballast relative the handle along the longitudinal axis of the bat. The selective adjustability of the ballast is provided by rotation of the ballast relative the handle while the handle, adjustment stem and ballast are integrally attached.
Inventors
- 👤 John L. Dirksing
- 👤 William P. Dirksing
- 👤 John W. Dirksing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:02
CPC Classifications
A; A63; A63B; A63B60/00; A63B60/42; A63B15/00; A63B69/00; A63B69/38
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
144 words
An adjustably weighted training bat for ball games, said bat comprising a handle which conforms substantially to standard size and shape characteristics of ball bats and having a grip portion and end knob to provide for safe handling and use of the bat, a ballast means, and a ballast adjustment means, said ballast adjustment means further comprising an adjustment stem attached to said handle and ballast attachment means connecting said ballast means to said adjustment stem, said handle, stem and ballast means being attached coaxially to one another, said ballast attachment means including external thread convolutions formed along the axial length of said adjustment stem adapted to provide selective adjustability of said ballast means relative said handle along the longitudinal axis of said bat by rotation of said ballast means relative said handle while said handle, adjustment stem and ballast means are integrally attached.
Claim 2
Dependent Claim
144 words
An adjustably weighted training bat for ball games, said bat comprising a handle which conforms substantially to standard size and shape characteristics of ball bats and having a grip portion and end knob to provide for safe handling and use of the bat, a ballast means, and a ballast adjustment means, said ballast adjustment means further comprising an adjustment stem attached to said handle and ballast attachment means connecting said ballast means to said adjustment stem, said handle, stem and ballast means being attached coaxially to one another, said ballast attachment means including external thread convolutions formed along the axial length of said adjustment stem adapted to provide selective adjustability of said ballast means relative said handle along the longitudinal axis of said bat by rotation of said ballast means relative said handle while said handle, adjustment stem and ballast means are integrally attached.
Claim 3
Dependent Claim
55 words
The training bat of claim 1, wherein said ballast means is substantially immoveably connected to said adjustment stem, and wherein said adjustment stem is adjustably attached to said handle and adapted to provide said selective adjustability of said ballast means relative said handle by rotation of said ballast means and said stem relative said handle.
Claim 4
Dependent Claim
26 words
The training bat of claim 1, further comprising calibration means to facilitate accurate adjustment of said ballast means to a predetermined position along said adjustment stem.
Claim 5
Dependent Claim
59 words
The training bat of claim 1, wherein said ballast adjustment means comprises internal threads formed within said ballast means to adjustably mount said ballast means on said adjustment stem, said ballast means being thereby adapted to be selectively secured along said adjustment stem at a predetermined position relative said handle by rotation of said ballast means relative said stem.
Claim 6
Dependent Claim
23 words
The training bat of claim 4, further comprising sleeve means adapted to be telescopingly mounted over said ballast means and said adjustment stem.
Claim 7
Dependent Claim
22 words
The training bat of claim 4, said bat further comprising ballast retention means attached to the distal end of said adjustment stem.
Claim 8
Dependent Claim
154 words
An adjustable weighted training bat for ball games, said bat comprising a handle which conforms substantially to standard size and shape characteristics of ball bats and having a grip portion and end knob to provide for safe handling and use of the bat, an adjustment stem attached to said handle, ballast means mounted on said adjustment stem for adjustable movement therealong, ballast attachment means to selectively secure said ballast means at a predetermined position along said adjustment stem, and ballast retention means attached to the distal end of said adjustment means, said handle, adjustment stem, and ballast means being integrally attached to one another substantially coaxially, and said adjustment stem and said ballast means including corresponding interacting threads to provide said selective securement of said ballast means along the longitudinal axis of said bat by rotation of said ballast means relative said handle while said handle, adjustment stem and ballast means remain integrally attached.
Claim 9
Dependent Claim
154 words
An adjustable weighted training bat for ball games, said bat comprising a handle which conforms substantially to standard size and shape characteristics of ball bats and having a grip portion and end knob to provide for safe handling and use of the bat, an adjustment stem attached to said handle, ballast means mounted on said adjustment stem for adjustable movement therealong, ballast attachment means to selectively secure said ballast means at a predetermined position along said adjustment stem, and ballast retention means attached to the distal end of said adjustment means, said handle, adjustment stem, and ballast means being integrally attached to one another substantially coaxially, and said adjustment stem and said ballast means including corresponding interacting threads to provide said selective securement of said ballast means along the longitudinal axis of said bat by rotation of said ballast means relative said handle while said handle, adjustment stem and ballast means remain integrally attached.
Claim 10
Dependent Claim
26 words
The training bat of claim 7, further comprising calibration means to facilitate accurate adjustment of said ballast means to a predetermined position along said adjustment stem.
Claim 11
Dependent Claim
27 words
The training bat of claim 7, further comprising sleeve means reciprocally mounted on said bat and adapted to telescope over said adjustment stem and said ballast means.
Claim 12
Dependent Claim
53 words
The training bat of claim 9, wherein said sleeve comprises a substantially hollow tube telescopingly mounted on said handle to provide intermittent access to said ballast means and said adjustment means as desired, and to cover said ballast means, said adjustment means and said adjustment stem when said training bat is in use.
Claim 13
Dependent Claim
42 words
The training device of claim 9, said device further comprising interlocking means adapted to connect said ballast means to said sleeve means whereby rotation of said sleeve means causes said ballast means to be selectively adjusted along said adjustment stem as desired.
Claim 14
Dependent Claim
125 words
An adjustably weighted training bat for ball games, said bat comprising a handle which conforms substantially to standard size and shape characteristics of ball bats and having a grip portion and end knob to provide for safe handling and use of the bat, ballast means, an externally threaded adjustment stem, and sleeve means, said ballast means being attached to said adjustment stem, said handle, adjustment stem, and ballast means being coaxially attached along a longitudinal bat axis, said ballast means being selectively adjustable relative said handle along said longitudinal axis by rotation of said ballast means relative said handle while said handle, adjustment stem and ballast means remain integrally attached, said sleeve means being adapted to telescope over said adjustment stem and said ballast means.
Claim 15
Dependent Claim
125 words
An adjustably weighted training bat for ball games, said bat comprising a handle which conforms substantially to standard size and shape characteristics of ball bats and having a grip portion and end knob to provide for safe handling and use of the bat, ballast means, an externally threaded adjustment stem, and sleeve means, said ballast means being attached to said adjustment stem, said handle, adjustment stem, and ballast means being coaxially attached along a longitudinal bat axis, said ballast means being selectively adjustable relative said handle along said longitudinal axis by rotation of said ballast means relative said handle while said handle, adjustment stem and ballast means remain integrally attached, said sleeve means being adapted to telescope over said adjustment stem and said ballast means.
Claim 16
Dependent Claim
45 words
The training bat of claim 12, said bat further comprising interlocking means adapted to connect said ballast means and said sleeve means such that rotation of said sleeve means relative said handle causes said ballast means to be selectively adjusted relative said handle, as desired.
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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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |