Weighting device for attachment to baseball bats

Claim 2

A weighting device for attachment to a conventional baseball bats including: a. a collapsible member of substantially doughnut shape having a bore, the size of which permits the handle portion of the bat to be passed through the bore while effecting frictional engagement of the portion of the member defining the bore with the barrel portion of the bat, for preventing relative longitudinal movement of said member with respect to the bat, when the latter is swung, b. said collapsible member comprising a pair of like, opposed, annular walls of flexible sheet material, c. means for sealing together the inner edges and outer edges respectively of said walls to provide an annular chamber therebetween,

Claim 3

d. a substantially rigid stiffener of annular shape fixed to said collapsible member proximate the bore thereof for controlling the stretching of said walls when engaged with a baseball bat,

Claim 4

d. a substantially rigid stiffener of annular shape fixed to said collapsible member proximate the bore thereof for controlling the stretching of said walls when engaged with a baseball bat,

Claim 5

e. weighting substance, and

Claim 6

e. weighting substance, and

Claim 7

f. valve means in one of said walls for admitting said weighting substance to the annular chamber for use of the device, and to permit removal of said weighting substance therefrom, for collapsing the member.

Claim 8

f. valve means in one of said walls for admitting said weighting substance to the annular chamber for use of the device, and to permit removal of said weighting substance therefrom, for collapsing the member.

Claim 9

The weighting device of claim 1, wherein: a. said substantially rigid stiffener is within the annular chamber at the point where the inner edges of said walls are sealed together.

Claim 10

The weighting device of claim 2, wherein: a. the inner periphery of said substantially rigid stiffener extends between the inner peripheral edges of said walls and is secured thereto.

Claim 11

The weighting device of claim 2, wherein: a. said substantially rigid stiffener comprises a ring positioned within said annular chamber adjacent the joint where the inner edges of said walls are sealed together.

Claim 12

The weighting device of claim 1, wherein: a. said weighting substance is granular material.

Claim 13

The weighting device of claim 1, wherein: a. said weighting substance is sand.

Claim 14

The weighting device of claim 1, wherein: a. said weighting substance is liquid.

Claim 15

The weighting substance of claim 7, wherein: a. said weighting substance is water.

Claim 16

The weighting device of claim 1, wherein: a. said walls are made of polyvinyl chloride.

Claim 17

The weighting device of claim 1, wherein: a. said walls are made of nylon.

Claim 18

A weighting device for attachment to a conventional baseball bats including: a. a collapsible member of substantially doughnut shape providing a bore the size of which permits the handle portion of the bat to be passed through the bore while effecting frictional engagement of the portion of the member defining the bore with the barrel portion of the bat, for preventing relative longitudinal movement of said member with respect to the bat, when the latter is swung, b. said collapsible member comprising a pair of like opposed annular walls of flexible polyvinyl chloride material, c. means for sealing together the inner edges and outer edges respectively of said walls to provide a closed annular chamber therebetween, d. a substantially rigid stiffener of annular shape, the inner periphery of which extends between the inner peripheral edges of said walls and is secured thereto. e. said stiffener being made of polyvinyl chloride material which is of stiffer consistency than said walls in order to control stretching of the portion of said walls adjacent the bore of the collapsible member, f. sand, and g. valve means in one of said walls for admitting said sand to the closed annular chamber for use of the device, and to permit removal of the sand therefrom, for collapsing the member.

Claim 19

A weighting device for attachment to a conventional baseball bats including: a. a collapsible member of substantially doughnut shape providing a bore the size of which permits the handle portion of the bat to be passed through the bore while effecting frictional engagement of the portion of the member defining the bore with the barrel portion of the bat, for preventing relative longitudinal movement of said member with respect to the bat, when the latter is swung, b. said collapsible member comprising a pair of like opposed annular walls of flexible polyvinyl chloride material, c. means for sealing together the inner edges and outer edges respectively of said walls to provide a closed annular chamber therebetween, d. a substantially rigid stiffener of annular shape, the inner periphery of which extends between the inner peripheral edges of said walls and is secured thereto. e. said stiffener being made of polyvinyl chloride material which is of stiffer consistency than said walls in order to control stretching of the portion of said walls adjacent the bore of the collapsible member, f. sand, and g. valve means in one of said walls for admitting said sand to the closed annular chamber for use of the device, and to permit removal of the sand therefrom, for collapsing the member.