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:
Apr. 12, 1983
Filed:
Jun. 11, 1981
Applicant:
Inventors:
Takeshi Katagiri, Machida, JP;
Takakazu Tsuchifuji, Tokyo, JP;
Assignee:
Yoshizuka Seiki Co., Ltd., Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B30B / ;
U.S. Cl.
CPC ...
425 78 ; 425415 ; 425416 ; 425444 ;
Abstract
Press for powder metallurgy and method of simultaneous compression of powder in a die disclosed which includes descent speed differentially control apparatuses for simultaneous compression powder in the die from both the upper and lower direction by an upper punch and a lower punch. The descent speed of an upper ram is transferred to the upper punch at that speed, and the speed is changed to lower speed through the control device than the upper punch speed and the controlled lower speed is transferred to a die holder which is simultaneously descended with the controlled lower speed together with the high speed upper punch.