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:
May. 07, 2002
Filed:
Dec. 15, 1999
Hideto Hashiguchi, Hyogo, JP;
Takahisa Ueda, Hyogo, JP;
Nippon Pillar Packing Co., Ltd., Osaka, JP;
Abstract
A shaft seal apparatus that exhibits a good and reliable sealing performance, even when a rotating shaft undergoes axial vibration, eccentric revolution, or the like. This shaft seal apparatus has gland packings ( ) stuffed in a sealed space ( ) formed between a rotating shaft ( ) and a stuffing box ( ), with gland packings ( ) pressed between a first packing gland ( ) on a sealed liquid region side ( ) and a second packing gland ( ) on an atmospheric region side ( ). The first packing gland ( ) is fixed to a rotary equipment body ( ) and the second packing gland ( ) is to the stuffing box ( ). A screw bolt ( ) extending in the axial direction of the rotating shaft ( ) is anchored to the first packing gland ( ). The stuffing box ( ) is provided with a through hole ( ) larger than the screw bolt ( ) in the flange ( ). The screw bolt ( ) running through the through hole ( ) has a tightening nut ( ) thereon at a place which is out of and backward of the hole ( ). A compression coil spring ( ) is mounted on screw bolt ( ) between flange ( ) and tightening nut ( ).