| 发明名称 | Drumhead with extended collar | ||
| 摘要 | A drumhead comprising a circular membrane having a flat central play region, a collar extending outwardly and downwardly from the play region, and an outer edge region extending from the collar. A hoop defines a circular channel in which the outer edge region of the membrane is retained. The collar has a convexly curved region having upper and lower ends spanning an included angle, with the upper end transitioning tangentially into the play region and a frustoconical skirt region flaring outwardly from the lower end of the curved region and transitioning into the outer edge area. The included angle of the convexly curved region is about 90 deg., and the skirt and outer edge region of the membrane frustoconically extend from the lower end of the curved region to the channel of the hoop, at a substantially uniform angle in the range of about 10 to 30 deg. | ||
| 申请公布号 | US8859869(B2) | 申请公布日期 | 2014.10.14 |
| 申请号 | US201313803813 | 申请日期 | 2013.03.14 |
| 申请人 | D'Addario & Company, Inc. | 发明人 | Murray Steven T.;Drumm Richard K. |
| 分类号 | G01D13/02;G10D13/02 | 主分类号 | G01D13/02 |
| 代理机构 | Alix, Yale & Ristas, LLP | 代理人 | Alix, Yale & Ristas, LLP |
| 主权项 | 1. A stand-alone drumhead comprising: a circular membrane having a flat central play region, a collar extending outwardly and downwardly from the play region, and an outer edge region extending from the collar; and a hoop defining a circular channel in which the outer edge region of the membrane is retained; wherein the collar has a convexly curved region having upper and lower ends spanning an included angle, with the upper end transitioning tangentially into the play region and,a frustoconical skirt region flaring outwardly from a bend line at the lower end of the curved region and transitioning into said outer edge region. | ||
| 地址 | Farmingdale NY US | ||