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:
Jan. 07, 1986
Filed:
Aug. 17, 1984
Karl Klingenberg, Porta-Westfalica, DE;
Battenfeld Extrusionstechnik GmbH, Bad Oeynhausen, DE;
Abstract
A worm press extruder or the like includes a worm shaft which conveys a flow medium within a housing cylinder. In order to provide the medium with an appropriate pressure and temperature the worm shaft cooperates with a constriction plate so as to define a gap therebetween. The gap is controlled by heat responsive unit e.g. a bolt of high thermal expansion coefficient which is connected to a stationary portion of the housing as well as to another housing portion which is movable with respect to the stationary housing portion by lever means. Consequently, when the temperature of the bolt is changed its length is altered thus causing the other housing portion which is associated with the constriction plate to shift towards the stationary housing portion. Since the worm shaft is supported by the stationary housing portion and cannot move axially with respect to the latter, the movement of the constriction plate causes a modification of the gap.