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. 04, 2001
Filed:
Mar. 30, 1999
Nippon Pillar Packing Co., Ltd., Osaka, JP;
Abstract
A shaft sealing apparatus,comprising a seal case,mounted on a tank shell,of rotary equipment, a rotary seal ring,fixed to the rotary shaft,of the rotary equipment, a stationary seal ring,held in the seal case,opposite to the rotary seal ring,and movable in the axial direction, a coil spring,to thrust the stationary seal ring,against the rotary seal ring,, a gas feeding channel,formed out of a series of gas passages running through the seal case,and the stationary seal ring 4 and opening between the two seal end faces,of the two seal rings,, and a gas jetting mechanism to jet, selectively, a seal gas,such as nitrogen and a sterilization gas,such as steam through the gas feeding channel,into between the seal end faces,. In normal operation, the shaft seal apparatus,functions to seal at the relatively rotating portions of the end faces,of the seal rings,, while holding the seal ends,in a non-contact state, by jetting a seal gas,such as nitrogen into between the two seal end faces,. In sterilization mode, a sterilization gas,such as steam is jetted into between the two seal end faces,instead of the seal gas,, sterilizing at least the gas feeding channel,and the seal end faces