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. 17, 2002
Filed:
Nov. 02, 2000
Kenichi Kubota, Morioka, JP;
Norio Takehana, Shizukuishi-machi, JP;
Takehiko Naiki, Takizawa-mura, JP;
Mikuni Adec Corporation, , JP;
Abstract
A lubricating oil supplying device allows for the oil discharge amount to be more finely controlled by provision of many outlet ports, and by reducing the influence of vibration. Therefore, a spool valve unit and a pump are separately formed. The spool valve unit includes an open-close spool valve and a solenoid for controlling operation of this spool valve. Plural inlet passages and an outlet passage are formed in the spool valve. The spool valve opens or closes the inlet passages, and oil from the pump is introduced into these inlet passages. One side of the outlet passage communicates with the inlet passages, and the other side communicates with an engine. A passage for introducing the oil from an oil tank to a pump chamber is formed in the solenoid. When the solenoid is turned “OFF”, communication between the return passage and the inlet passages is interrupted by the spool valve, and the oil is discharged from the pump to the plural inlet passages. The oil is discharged from the inlet passages to the engine via a check valve. When the solenoid is turned “ON”, the return passage communicates with the inlet passages through the spool valve, and the oil is returned to the pump via the return passage.