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. 26, 1995
Filed:
Dec. 14, 1994
Bernhard Wilhelmi, Linsengericht, DE;
Horst Gerdes, Herzberg, DE;
Leybold Durferrit GmbH, Cologne, DE;
Abstract
In a furnace operated with hydrogen gas as a cooling gas under positive pressure for the hardening of metallic workpieces, with a housing (2) enclosing a heating chamber for accepting a batch of workpieces, this housing being connected to a vacuum pump and being openable by way of a bottom housing cover (3) Cooling gas is circulated through gas outlets and outlets opening into the heating chamber by the impeller of a motor-blower unit. A heating system is provided on the bottom section (78) of a batch table (8) supported on the housing cover (3) and rotable around a vertical axis (A). A grate formed of bars (34) is mounted above the heating system (37) for supporting the batch of workpieces, and insulating plates (43, 44) are installed underneath the heating system (37). The bottom section (7) is connected on its bottom side to a bearing journal (15), which passes through a bearing ring (5) on the housing cover (3) in a sealed manner, and which is coupled by way of a shaft (16) to a motorized drive (19) which rotates the bottom section (7) and thus the batch table (8).