Actuator unit and method for manufacturing an actuator unit

Details Actuator unit and method for manufacturing an actuator unit Actuator unit and method for manufacturing an actuator unit

2004-11-16

2010-11-30

Benson, Walter (Department: 2837)

Internal-combustion engines

Charge forming device

With fuel pump

C310S311000, C029S025350

Reexamination Certificate

active

07841320

ABSTRACT:
An actuator unit has a tube spring (32), a piezoelectric actuator (31), that is inserted into the tube spring (32), a first cap (33), that is connected to the tube spring (32) at a first free end of the tube spring (32) and which is adjoined by the piezoelectric actuator (31), a tube-shaped body38, that is connected to the tube spring (32) by joining and is arranged in the area of a second free end (35) of the tube spring (32), and a device for pretensioning, that is supported by the tube-shaped body (38) and pretensions the piezoelectric actuator (31). The actuator unit is simple and cheap to manufacture.

REFERENCES:
patent: 6051138 (2000-04-01), Hobson, Jr.
patent: 6326717 (2001-12-01), Mattes
patent: 6499471 (2002-12-01), Shen et al.
patent: 6681462 (2004-01-01), Frank et al.
patent: 6984924 (2006-01-01), Voigt et al.
patent: 6998761 (2006-02-01), Frank et al.
patent: 2002/0056768 (2002-05-01), Czimmek
patent: 99/08330 (1999-12-01), None
patent: 00/08353 (2000-02-01), None
International Search Report and the Written Opinion of the International Searching Authority, or the Declarartion for Application No. PCT/EP2004/052978, 10 pages, Jan. 13, 2005.

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