The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 2011
Filed:
Nov. 12, 2009
Hideki Yamagata, Sagamihara, JP;
Mamoru Hosogai, Sagamihara, JP;
Hideki Tsuchiya, Sagamihara, JP;
Yoshiharu Miya, Sagamihara, JP;
Tomoyuki Fujita, Kani, JP;
Ryuji Naide, Kani, JP;
Koichiro Akatsuka, Gifu, JP;
Kenji Yazaki, Kani, JP;
Masato Ikeguchi, Yokohama, JP;
Hideki Yamagata, Sagamihara, JP;
Mamoru Hosogai, Sagamihara, JP;
Hideki Tsuchiya, Sagamihara, JP;
Yoshiharu Miya, Sagamihara, JP;
Tomoyuki Fujita, Kani, JP;
Ryuji Naide, Kani, JP;
Koichiro Akatsuka, Gifu, JP;
Kenji Yazaki, Kani, JP;
Masato Ikeguchi, Yokohama, JP;
Kayaba Industry Co., Ltd., Tokyo, JP;
Abstract
A solenoid actuator () comprises a case () made of a magnetic material and housing a coil () wound on a bobbin (), and a pressure tube () made of a non-magnetic material and fitted into a hollow portion of the bobbin (). A base () and a sleeve () made of a magnetic material are disposed in the pressure tube (). A plunger () provided in an operation chamber () formed in the base () and the sleeve () strokes according to energization of the coil () to axially drive a shaft () fixed to the plunger (). The pressure tube () ensures that magnetic flux is transferred between the case () and the sleeve () while preventing pressure variation in the operation chamber () from being transmitted to the bobbin (), thereby achieving a high response and a pressure tightness in the solenoid actuator ().