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:
Dec. 20, 1994
Filed:
Jun. 03, 1993
William B Cushman, Pensacola, FL (US);
Other;
Abstract
An improved compound bow apparatus with extreme let-off and high power is disclosed. The preferred embodiment of the instant invention is aesthetically improved, has inherently balanced limbs that require no adjustment, and has an improved dynamic balance and center of gravity. These and additional objects of the invention are accomplished by storing energy in a leaf spring energy storage device as the bow of the instant invention is drawn. Energy is stored by rotating bearing surfaces mounted on linkages attached to upper and lower bow limbs into a leaf spring in a manner that causes a portion of the force from the leaf spring which is proportional to the rotation angle to be absorbed as compression by the linkage, with the remainder causing torque on the upper and lower bow limbs. The movement of upper and lower bow limbs of the instant invention is coordinated with a synchronizing cable, but the force applied to the individual linkages is inherently balanced by allowing the leaf spring to freely pivot.