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US4552120A Expired / Lapsed US ⏱️ 0.0 years remaining

Batting instruction system

Assignee: NALL KENT J WYANDOTTE KN
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Filing: 1982-09-30
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Granted: 1985-11-12
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Expires: 2002-09-30
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Abstract

Abstract The system includes a stance and stride chart adapted to lie flatly on the ground and having indicia thereon indicating home plate and the proper location for a batter's feet as he stands adjacent home plate in preparation for taking a stride during a batting swing. Further included is a ball toss device adapted to be positioned forwardly adjacent the stride chart and operable to loft a ball gently through the strike zone above the plate for hitting by the batter as he completes the swing. A catching net may be positioned forwardly of the chart to collect batted balls. The ball toss device is operable to loft a supply of balls sequentially and at spaced intervals toward the strike zone and has the capability of adjustment for accommodating either hardballs or larger diameter softballs. An adjustment is also provided which enables the loft of the balls being propelled from the device to be varied substantially in order that the device may be used to propel ground balls toward a fielder instead of lofting them toward a batter.

Inventors

  • 👤 Kent J. Nall
  • 👤 W. Christopher Barteldes
  • 👤 David W. Payne
  • 👤 Charles P. Rome
  • 👤 Wayne A. Abrams

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 10:33
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/40; A63B69/406

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 215 words
A ball toss device for sequentially lofting baseballs or the like at spaced intervals toward a target area such as home plate, said device comprising: a ball-guiding track having a ball-receiving end and a ball-discharging end; a rotary impeller adjacent said track and between said opposite ends thereof in disposition for engaging a ball presented thereto in the track and for thereupon propelling the same off said discharge end of the track into the air; and means for successively delivering a supply of balls to said receiving end of the track at a metered rate of delivery, said delivering means including a throat through which the balls must pass as they approach said track, said throat having a lateral component thereof shiftable between a first position retaining a ball against passage to the track and a second position releasing the ball to the track, said component being provided with means yieldably biasing the same toward said retaining position thereof, said component being rotatively driven in a direction to engage the periphery of a ball retained by the throat and urge the same through the throat, the reaction force caused by such urging movement by the component being sufficient to progressively shift the component to said releasing position against the action of said yieldable biasing means.
Claim 2
Dependent Claim 215 words
A ball toss device for sequentially lofting baseballs or the like at spaced intervals toward a target area such as home plate, said device comprising: a ball-guiding track having a ball-receiving end and a ball-discharging end; a rotary impeller adjacent said track and between said opposite ends thereof in disposition for engaging a ball presented thereto in the track and for thereupon propelling the same off said discharge end of the track into the air; and means for successively delivering a supply of balls to said receiving end of the track at a metered rate of delivery, said delivering means including a throat through which the balls must pass as they approach said track, said throat having a lateral component thereof shiftable between a first position retaining a ball against passage to the track and a second position releasing the ball to the track, said component being provided with means yieldably biasing the same toward said retaining position thereof, said component being rotatively driven in a direction to engage the periphery of a ball retained by the throat and urge the same through the throat, the reaction force caused by such urging movement by the component being sufficient to progressively shift the component to said releasing position against the action of said yieldable biasing means.
Claim 3
Dependent Claim 56 words
A ball toss device as claimed in claim 1, wherein said impeller is mounted for adjusting movement toward and away from said track to accommodate balls of different sizes, said impeller having means coupling the same with said component for adjusting the position of the latter in response to adjustment of the position of the impeller.

References Cited (Backward Citations)

AT70529B Cited
US1211738A Cited
US1252327A Cited
US2288979A Cited
US2566379A Cited
US3003770A Cited
US3306613A Cited
US3248008A Cited
US3399660A Cited
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US4080950A Cited
US4203413A Cited
US4423717A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-11-11 1989-05-13 1989-11-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-11-11 1993-05-13 1993-11-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-11-11 1997-05-13 1997-11-12 $7700.00 Window Closed / Lapsed

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