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. 11, 2007
Filed:
Jan. 24, 2005
Fusamitsu Ito, Aichi, JP;
Fusamitsu Ito, Aichi, JP;
Hoshino Gakki Mfg. Co., Ltd., , JP;
Abstract
A drum includes a cylindrical body, a cylindrical head frame, which is fitted to the outer circumference of the body, a hoop located at the outer circumference of a head, lugs located at the outer circumference of the body, lug nuts, and lug bolts. A loosening prevention structure is located between the lower surface of the head of each lug bolt and the upper surface of the hoop. Each loosening prevention structure is formed by a washer with rubber according to a preferred embodiment. The washer with rubber is formed by an annular elastic body and a bowl-shaped cover. The elastic body is made of rubber. The cover includes a cylindrical portion, which covers the outer circumference of the elastic body. The cylindrical portion is formed to be shorter than the elastic body along the axial direction of the body.