US 11,298,858 B2Granted

Method for manufacturing sealing device, and sealing device

AssigneeNok Corporation

InventorsHiroaki Sato, Akira Morio, Daihachi Shojima

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Abstract

A method for manufacturing a sealing device to improve the positioning accuracy of a parting operation while also improving manufacturing efficiency. The method includes molding an elastomeric cylindrical molded body (100a) with a plurality of cylindrical surface portions (130) and a plurality of annular outer peripheral convex portions (110) arranged alternately on an outer peripheral side thereof, and further provided with a plurality of cylindrical surface portions and a plurality of annular inner peripheral convex portions arranged alternately on an inner peripheral side thereof. The cylindrical surface portions on the outer peripheral side and the cylindrical surface portions on the inner peripheral side, as well as the outer peripheral convex portions and the inner peripheral convex portions are provided so as to be at the same positions in the axial direction.

Claims2

Dependent claims

A sealing device, that is an entirely elastomeric sealing device and is fitted in an annular fitting groove formed on one of two members configured to be reciprocally movable relative to each other, so as to seal an annular gap between these two members, wherein:

on an outer peripheral side thereof, an annular outer peripheral convex portion;
and cylindrical surface portions provided on both sides of the outer peripheral convex portion are formed;
and
on an inner peripheral side thereof, an annular inner peripheral convex portion;
and cylindrical surface portions provided on both sides of the inner peripheral convex portion are formed,
wherein shapes and dimensions of cross sections of the outer peripheral convex portion and the inner peripheral convex portion are the same, and the projection height of the outer peripheral convex portion and the projection height of the inner peripheral convex portion are set within a range from 0.2 mm to 0.4 mm, inclusive.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/353,618Filed 14 Mar 2019 · division
Priority: JP 2012-23890030 Oct 2012
Published: US 2019/0210257 A111 Jul 2019
Granted: 12 Apr 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

B29C 45/0053
Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor: combined with…
F16J 15/108
With non-metallic packing: special methods for making a non-metallic packing
F16J 15/164
Between relatively-moving surfaces: the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
F16J 15/3204
With elastic sealings, e.g. O-rings: with at least one lip

Family

PCT/JP2013/052252Parent of this division · filed 31 Jan 2013
US 2019/0210257 A1Pre-grant publication · published 11 Jul 2019
Application14/438,708Parent of this division
US 10,279,518 B2Parent of this division
US 2015/0290851 A1Published application
US 11,298,858 B2This patent

From the US filing history. Foreign family members aren’t listed.

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