发明名称 |
High pressure low volume pump |
摘要 |
A piston carrier (46) supports an elongated, slender piston rod (2) for reciprocation in a pump cylinder (30) to pump fluid into and out of the cylinder (30). The piston rod (12) is made of a material such as sapphire or zircon and has a diameter less than about ten millimeters, and the pump can provide flows of from about 50 nanoliters to about 250 microliters per minute at pressures of several hundred bars. A drive motor (18) rotates a threaded screw (58) and a drive nut (70) of a drive system (26) applies a linear drive force to the piston carrier (46). A ball and socket connection (74) between the drive system (26) and the piston carrier (46) avoids the need for precise alignment to prevent breakage of the fragile piston (12). A magnet (80) in the (78) holds the ball (76) in place and avoids the need for a spring or other mechanical holder. The socket (78) also includes a ring (88) of a low, reluctance material surrounding the ball (76) to increase the magnetic retention force.
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申请公布号 |
US2003121414(A1) |
申请公布日期 |
2003.07.03 |
申请号 |
US20020182882 |
申请日期 |
2002.10.22 |
申请人 |
CAUTENET ETIENNE;DE TALHOUET PHILIPPE |
发明人 |
CAUTENET ETIENNE;DE TALHOUET PHILIPPE |
分类号 |
F04B53/14;F04B53/22;(IPC1-7):F01B9/00 |
主分类号 |
F04B53/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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