公开(公告)号：US20100236866A1

公开(公告)日：2010-09-23

申请号：US12406270

申请日：2009-03-18

Applicant: Chin-Yin Huang

Inventor： Chin-Yin Huang

IPC: E06C7/00 ,  E06C1/16 ,  E06C1/20 ,  E06C1/387

CPC classification number: E06C1/18 ,  E06C1/387 ,  E06C7/46

Abstract: A stepladder has a front frame, a rear frame, a bracket and multiple steps. The front frame has two front side rails and multiple rungs mounted between the front side rails. The rear frame is connected pivotally to the front frame and has two rear side rails, a crossbeam and a lock. The lock is mounted pivotally on the crossbeam. The bracket is connected pivotally and slidably to the rear frame and has multiple pivot pins. The steps are mounted pivotally on the bracket and are selectively and engaged respectively with the rungs of the front frame. The lock selectively hooks a pivot pin to stably lock the bracket for improved safety.

Abstract translation: 梯子具有前框架，后框架，支架和多个步骤。 前框架具有两个前侧导轨和安装在前侧导轨之间的多个梯级。 后框架枢转地连接到前框架，并且具有两个后侧导轨，横梁和锁。 锁在枢轴上安装在横梁上。 支架可枢转地和可滑动地连接到后框架并且具有多个枢轴销。 台阶可枢转地安装在支架上，并分别与前框架的梯级选择性地接合。 该锁选择性地钩住枢轴销以稳定地锁定支架以提高安全性。

公开(公告)号：US06891093B2

公开(公告)日：2005-05-10

申请号：US10626545

申请日：2003-07-25

Applicant: Chin-Yin Huang

Inventor： Chin-Yin Huang

IPC: G10D1/02 ,  G10D3/18

CPC classification number: G10D3/18

Abstract: A steplessly adjustable shoulder rest for violin or the like includes an elongated base having two oppositely spaced recesses provided on an upper surface thereof. Two guiding and locking bolts are separately located at and projected from an outer side of a center of the two recesses to engage with long slots on two adjusting slides, so that the adjusting slides are slidably located in said recesses. Outer ends of the two adjusting slides are two vertical end walls, to outer sides of which two binding elements are screwed to move along with the adjusting slides. Two nuts are tightened to or loosened from the two guiding and locking bolts upward projected from the adjusting slides, so the adjusting slides may be steplessly adjusted to desired positions for the binding elements to best fitly connect the shoulder rest to a lower rear end of the violin or the like.