Gland packing
AssigneeNippon Pillar Packaging Co., Ltd.
InventorsTakahisa Ueda, Masaru Fujiwara
Life of this patent
Estimating the term…
Abstract
A gland packing which is made of a material configured by windingly laminating an expanded graphite tape into a spiral shape. In the gland packing, ring-like projected parts are disposed on end faces of a die mold packing part made of an expanded graphite tape windingly laminated into a spiral shape so as to be integrated with the part. Ring-like seal members are brought into tight contact with the end faces of the die mold packing part excluding the ring-like projected parts in such a manner that the ring-like projected parts are projected in an axial direction beyond the outer faces of the respective ring-like seal members.
Claims2
A gland packing, comprising:
- a die mold packing part formed by winding and die-molding a laminated expanded graphite tape, said formed die mold packing part defining an axial direction, a pair of end faces with one of the end faces being perpendicular to the axial direction and the other of the end faces being angled with respect to the axial direction, an inner end portion, an outer end portion, and a circumferential projected part which projects outwardly from at least one of said end faces;
- and
- at least one ring-shaped seal member engaging one of said pair of end faces, wherein:
- said at least one ring-shaped seal member has an inner face, an outer face, an inner peripheral surface and an outer peripheral surface, with said inner face in tight contact with one of said pair of end faces in said axial direction of said die mold packing part, said outer face of said at least one ring-shaped seal member being an oblique circular cone face extending inward at a constant slope in said axial direction when viewed in the direction of said outer end portion from said inner end portion;
- and
- said circumferential projected part has a projection end face positioned in a plane which is an extension of said oblique circular cone face, said circumferential projected part further has, an inner peripheral surface and an outer peripheral surface, with at least one of said inner peripheral surface and said outer peripheral surface of said projected part in tight contact with one of said inner peripheral surface and said outer peripheral surface of said at least one ring-shaped seal member.
Dependencies are inferred from the claim text.