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:
Apr. 14, 1998
Filed:
Jul. 26, 1996
Scott Meunier, Sioux Falls, SD (US);
Rick Skallerud, Sioux Falls, SD (US);
Larry VerSteeg, Sioux Falls, SD (US);
Gary Newman, Valley Springs, SD (US);
Amesbury Group, Inc., Amesbuy, MA (US);
Abstract
A block and tackle balance disposed between a jambliner and a window sash includes a spring and a non-rotating pulley system. A head block is disposed on a rod for attaching the balance to the jambliner and securing one end of the spring, and a slide block is disposed at about the midpoint of the rod for securing the other end of the spring. The slide block acts in combination with a base block and a pulley cord, to create the non-rotating pulley system. The slide block and the base block each have at least one cord-receiving channel formed in a raised u-shaped member, for slidably receiving the pulley cord. The base block further includes a bore for securing an end of the pulley cord, and is coupled via the pulley cord to a shoe, which moves in response to movement of the window sash. As the shoe moves, the cord slides within the channels, and the slide block moves toward the base block. The displacement of the slide block relative to the fixed head block, results in a change in the length of the spring such that the spring supports the new position of the window sash.