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:
Aug. 14, 2007
Filed:
Nov. 19, 2002
Applicants:
Rudolf Lüthi, Niederwangen, CH;
Daniel Meier, Schmitten, CH;
Inventors:
Rudolf Lüthi, Niederwangen, CH;
Daniel Meier, Schmitten, CH;
Assignee:
Adval Tech HOLDING AG, Niederwangen, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21J 13/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a so-called spring cushion (), for the ejection of moulded pieces () from a moulding tool (), with a plunger (), moving in a guide tube () within the moulding tool and loaded in the ejection direction () by means of a spring (). According to the invention, the spring () is embodied as a draw spring, in particular as a spiral draw spring. Considerably longer service life can be achieved as draw springs do not have radial deflections on loading.