The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 1977
Filed:
Oct. 28, 1975
Seppo I Miettinen, Helsinki, SF;
The United States of America as represented by the Department of Commerce, Washington, DC (US);
Abstract
In the center of the bowling ball a three-way valve has been mounted and iating from this, three tubes closed at one end, one of the tubes lying substantially in the plane containing the line of throw while the other two are laterally directed on either side of said plane. The system of tubes and valve contains a quantity of mercury substantially equivalent to the capacity of one tube, and the mercury may by means of the three-way valve be transferred from the central tube into one or the other side tube and thereby the center of gravity shifted to one side. The three-way valve is controllable by means of a stem, from the surface of the ball. In an alternative embodiment all three tubes lie in the plane containing the line of throw.