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发明名称
Piston structure for an air pump
摘要
A piston for an air pump is disclosed. The piston has a piston rod having a connecting axle hole for positioning a bearing, which is protected with a bearing protection cap. The bearing is firmly secured within the axle hole.
申请公布号
US7228788(B1)
申请公布日期
2007.06.12
申请号
US20050321867
申请日期
2005.12.30
申请人
CHEN CHI-MING
发明人
CHEN CHI-MING
分类号
F01B31/00;F16J9/00
主分类号
F01B31/00
代理机构
代理人
主权项
地址
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