Invention Grant
- Patent Title: Effort-saving hand operated punching device
- Patent Title (中): 省力手动冲孔装置
-
Application No.: US12323569Application Date: 2008-11-26
-
Publication No.: US08109189B2Publication Date: 2012-02-07
- Inventor: Eric Tsai
- Applicant: Eric Tsai
- Applicant Address: TW Taichung Hsien
- Assignee: Apex Mfg. Co., Ltd.
- Current Assignee: Apex Mfg. Co., Ltd.
- Current Assignee Address: TW Taichung Hsien
- Agency: Kamrath IP Lawfirm, PA
- Agent Alan Kamrath
- Main IPC: B26F1/02
- IPC: B26F1/02
Abstract:
A hole punching device includes two first punching members and a second punching member intermediate the two first punching members. First, second and third lever arms are adapted to render one of the two first punching members, another of the two first punching members and the second punching member to press holes in sheets respectively. The first lever arm has a longitudinal length longer than those of the second and third lever arms, with the second lever arm being longer than that of the third lever arm. Further, the first lever arm actuates the second and third lever arms upon depression of the hole punching device.
Public/Granted literature
- US20100126325A1 Effort-Saving Hand Operated Punching Device Public/Granted day:2010-05-27
Information query
IPC分类:
