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:
Sep. 29, 2009
Filed:
Jul. 12, 2007
Minoru Hirata, Toyokawa, JP;
Takayuki Komiyama, Toyokawa, JP;
Toshihiko Oya, Toyokawa, JP;
Tsuyoshi Sakai, Toyokawa, JP;
Koichi Sakaguchi, Toyokawa, JP;
Minoru Hirata, Toyokawa, JP;
Takayuki Komiyama, Toyokawa, JP;
Toshihiko Oya, Toyokawa, JP;
Tsuyoshi Sakai, Toyokawa, JP;
Koichi Sakaguchi, Toyokawa, JP;
Sintokogio, Ltd., Aichi, JP;
Abstract
A hydraulic power unitof a match-plate molding machine comprises a hydraulic pumpfor supplying oil, a piping system, andthat fluidly communicates with first and second hydraulic cylinder systemsandfor supplying the oil from the hydraulic pumpto them to perform a squeeze step, an accumulatorthat is provided within the piping system, first and second electromagnetic directional control valvesandfor controlling the flow of the oil from the hydraulic pumpto the first and second hydraulic cylinder systemsand, first and second pressure sensorsandfor measuring pressures of the oil of the first and second hydraulic cylinder systemsand, and for generating output signals that correspond to the measured value, and a controllerfor receiving the output signals from the first and second pressure sensorsand, and for controlling the turns of the first and second electromagnetic directional control valvesandbased on the output signals and the predetermined value within a range below the pressure holding the accumulatoragainst the oil.