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.

Date of Patent:
Jul. 04, 1989

Filed:

Oct. 26, 1987
Applicant:
Inventors:

Takahisa Ueda, Sanda, JP;

Hiroyuki Sasakura, Sanda, JP;

Takashi Ikeda, Sanda, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
277-4 ; 2771 / ;
Abstract

A structure of a gland packing box is enhanced in the lubricating function and cooling function of the seal part, by forming at least one disclocating part for partly dislocating in the axial direction a gland packing of the gland packing box. The dislocating part is located on the fitting face of a gland packing holding member for fitting in the axial direction the gland packing externally mounted on a rotary shaft in the packing box. The dislocation causes part of the annular gap formed between the inside of the gland packing holding member and the outside of the rotary shaft to overlap with the internal surface of the gland packing in the circumferential direction, and forces a fluid to be sent into the inner surface of the overlapping gland packing along with rotation of the rotary shaft.


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