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:
Jul. 05, 2011
Filed:
Nov. 05, 2009
Hideki Yamagata, Sagamihara, JP;
Mamoru Hosogai, Sagamihara, JP;
Hideki Tsuchiya, Sagamihara, JP;
Yoshiharu Miya, Sagamihara, JP;
Tomoyuki Fujita, Kani, JP;
Koichiro Akatsuka, Gifu, JP;
Kenji Yazaki, Kani, JP;
Hideki Yamagata, Sagamihara, JP;
Mamoru Hosogai, Sagamihara, JP;
Hideki Tsuchiya, Sagamihara, JP;
Yoshiharu Miya, Sagamihara, JP;
Tomoyuki Fujita, Kani, JP;
Koichiro Akatsuka, Gifu, JP;
Kenji Yazaki, Kani, JP;
Kayaba Industry Co., Ltd., Tokyo, JP;
Abstract
A solenoid actuator () attached to a hydraulic equipment comprises a shaft () connected to the hydraulic equipment, a plunger () fixed to the shaft (), a coil () which magnetically drives the plunger (), and a first bearing () and a second bearing () supporting the shaft () on both sides of the plunger (). A plunger front chamber () is formed between the first bearing () and the plunger (), a plunger rear chamber () is formed between the plunger () and the second bearing (), and a second bearing rear chamber () is formed on the opposite side of the second bearing () to the plunger rear chamber (). To secure an oil flow between these chambers, a plunger exterior oil passage (), a second bearing oil passage (), and a shaft-penetrating oil passage () are provided, thereby realizing a preferable balance between oil pressures acting on the second bearing ().