Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
A baseball practice device comprising A base, a vertical stationary support thereon, a second vertical support slidably mounted on the first said support, means preventing relative rotation between the two said supports, a vertical shaft rotatably carried by the second said support and extending thereabove, a laterally extending arm on the extending portion of said shaft, a ball tethered on the extending end of said arm, means rotating said shaft and means raising and lowering the second said support relative to said stationary support.
Claim 2
Dependent Claim
84 words
A baseball practice device comprising A base, a vertical stationary support thereon, a second vertical support slidably mounted on the first said support, means preventing relative rotation between the two said supports, a vertical shaft rotatably carried by the second said support and extending thereabove, a laterally extending arm on the extending portion of said shaft, a ball tethered on the extending end of said arm, means rotating said shaft and means raising and lowering the second said support relative to said stationary support.
Claim 3
Dependent Claim
71 words
A baseball practice device as defined in claim 1 and wherein said means rotating said vertical shaft includes a motor and reduction gear carried by the second said vertical support, a drive sprocket having a vertical axis driven by said reduction gear, a sprocket on said vertical shaft and an endless drive chain connecting the two said sprockets, and an electrically controlled clutch in said vertical shaft above the sprocket thereon.
Claim 4
Dependent Claim
62 words
A baseball practice device as defined in claim 1 and wherein said means raising and lowering said second vertical support includes a reversible motor mounted near the upper portion thereof, a reduction gear driven by the motor, a depending screw driven by the reduction gear and a fixed nut carried by the first said vertical support and threadedly receiving said depending screw.
Claim 5
Dependent Claim
40 words
A baseball practice device as defined in claim 1 wherein said means raising and lowering the second said support relative to said stationary support is operable during rotation of said shaft for effecting a change in elevation during batting practice.
Claim 6
Dependent Claim
39 words
A baseball practice device as defined in claim 4 wherein said means raising and lowering the second said support relative to said stationary support comprises a powered means that is responsively connected with and responsive to a remote control.
Claim 7
Dependent Claim
56 words
A baseball practice device as defined in claim 5 wherein said powered means comprises a reversible electric motor that is drivingly connected with one element of a screw element-nut element combination so as to effect respective directional rotation of said one element for raising and lowering the second said support with respect to said stationary support.