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. 21, 2020
Filed:
Apr. 24, 2019
Ko-yu Chang, Taichung, TW;
Ko-Yu Chang, Taichung, TW;
Other;
Abstract
A crossbow has a body, two bow assemblies, two pulley assemblies, and a string. The two bow assemblies are respectively disposed at two sides of the body. Each one of the two bow assemblies has a limb being capable of swinging relative to the body, a guiding unit obliquely extending toward the limb, a joint with two ends, and multiple Belleville springs mounted on and around the guiding unit and simultaneously abutting against the body and the joint. An angle is defined between the guiding unit and the body. The joint has an allowance for movement with the limb that allows a free end of the limb to be pulled toward the body. The two pulley assemblies are respectively mounted on two free ends of two limbs of the two bow assemblies. The string has two ends respectively fixed to the two pulley assemblies.