Drum with head adjusting device
US7307204B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 2005 |
| Grant date | Dec 11, 2007 |
| Priority date | — |
| Expiry date | Jun 2, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10D13/16
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.