Bat swing practice means

• US 4,634,121 A
• Filed: 08/08/1985
• Issued: 01/06/1987
• Est. Priority Date: 08/23/1984
• Status: Expired due to Fees

• Current Assignee: Yuuki Sasaki
• Original Assignee: Yuuki Sasaki
• Inventors: Sasaki, Yuuki
• Primary Examiner(s): Pinkham, Richard C.
• Assistant Examiner(s): Brown, T.
• Application Number:
  US06/763,699
• Time in Patent Office: 516 Days
• Field of Search: 273/81 A, 273/26 R, 273/29 A, 273/186 A, 273/186 R, 273/202, 273/197 A, 273/194 A, 273/193 A, 273/194 B, 272/117, 272/124, 403/326, 403/379, 403/108
• US Class Current: 473/457
• CPC Class Codes: A63B 15/00 Clubs for gymnastics or the like , e.g. for swinging exercises

Abstract

A bat swing practice device comprising a shaft body having a predetermined length to be swung, a weight axially slidably put on the shaft body, and structure for engaging and disengaging the weight with and from the shaft body, the structure including a plurality of engagement holes formed in the shaft body at intervals and an engagement projection on the weight, the projection adapted to be resiliently engaged with and disengaged from any one of the engagement holes in the shaft body.

Claims

1. A bat swing practice means comprising a shaft body having a predetermined length to be swung, a weight axially slidably put on said shaft body, and means for engaging and disengaging said weight with and from said shaft body, said means including a plurality of engagement holes formed in said shaft body at spaced intervals therealong and an engagement projection on said weight, said projection being adapted to be resiliently engaged with and disengaged from any one of said engagement holes in said shaft body, said weight including a peripheral groove, and said engagement projection being secured to a loop-shape leaf spring resiliently fitted in said peripheral groove.

2. A bat swing practice means as set forth in claim 1 wherein a stopper for preventing the leaf spring from coming off is formed in the peripheral groove in the weight.