Sealing apparatus

Patent metadata

Field	Value
Publication number	US-10605367-B2
Application number	US-201816041003-A
Country	US
Kind code	B2
Filing date	Jul 20, 2018
Priority date	Feb 2, 2016
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

A sealing apparatus includes an annular lip member made of a resin material, and an annular spring member made of a metal material. The lip member includes a lip base portion, an outer-periphery-side lip, and an inner-periphery-side lip. The spring member includes: a spring base portion having an annular shape about an axis; an outer periphery pressing portion for pressing the outer-periphery-side lip; and an inner periphery pressing portion for pressing the inner-periphery-side lip. The spring member is accommodated in an accommodating groove. The outer periphery pressing portion includes a plurality of outer periphery pressing pieces, and the inner periphery pressing portion includes a plurality of inner periphery pressing pieces. The outer periphery pressing piece has a cutout extending along the axis without reaching a high-pressure-side edge of the outer periphery pressing piece, and the inner periphery pressing piece has a cutout extending along the axis without reaching a high-pressure-side edge of the inner periphery pressing piece.

First claim

What is claimed is:

1. A sealing apparatus for sealing an annular space formed between two members which are movable relative to each other, the sealing apparatus comprising:
a lip member which is a member made of a resin material and which has an annular shape about an axis; and
a spring member which is a member made of a metal material and which has an annular shape about the axis, wherein
the lip member includes: a lip base portion which is a portion having an annular shape about the axis, an outer-periphery-side lip which is an annular lip extending toward one side from an outer periphery side of an end portion of the lip base portion on the one side in a direction of the axis, an inner-periphery-side lip which is an annular lip extending toward the one side from an inner periphery side of the end portion of the lip base portion on the one side, and an accommodating groove which is an annular groove recessed toward an other side from the one side in the direction of the axis,
the spring member is accommodated in the accommodating groove, and the spring member includes: a spring base portion which is a portion having an endless annular shape about the axis; an outer periphery pressing portion for pressing the outer-periphery-side lip from the inner periphery side; and an inner periphery pressing portion for pressing the inner-periphery-side lip from the outer periphery side,
the outer periphery side toward the one side, and the outer periphery pressing portion includes a plurality of outer periphery pressing pieces which come into contact with the outer-periphery-side lip from the inner periphery side,
the inner periphery pressing portion includes a plurality of inner periphery pressing pieces which come into contact with the inner-periphery-side lip from the outer periphery side,
each of the outer periphery pressing pieces extends such that the outer periphery pressing piece inclines toward the outer periphery side from an end portion of the spring base portion on the outer periphery side toward the one side, and each of the outer periphery pressing pieces has a cutout extending along the axis without reaching an edge of the outer periphery pressing piece on the one side, and
each of the inner periphery pressing pieces extends such that the inner periphery pressing piece inclines toward the inner periphery side from an end portion of the spring base portion on the inner periphery side toward the one side, and each of the inner periphery pressing pieces has a cutout extending along the axis without reaching an edge of the inner periphery pressing piece on the one side.

2. The sealing apparatus according to claim 1 , wherein the outer periphery pressing pieces of the outer periphery pressing portion are arranged at equal angular intervals centered about the axis, and the inner periphery pressing pieces of the inner periphery pressing portion are arranged at equal angular intervals centered about the axis.

3. The sealing apparatus according to claim 1 , wherein each of the outer periphery pressing pieces and each of the inner periphery pressing pieces are arranged so as not to exact oppositely face each other in a direction orthogonal to the axis.

4. The sealing apparatus according to claim 1 , wherein the spring base portion of the spring member has a shape which is curved so as to project toward the other side in a cross section along the axis.

5. The sealing apparatus according to claim 1 , wherein the cutout of each of the outer periphery pressing pieces and the cutout of each of the inner periphery pressing pieces do not connect with each other.

6. The sealing apparatus according to claim 1 , wherein the cutouts of each of the outer periphery pressing pieces and the inner periphery pressing pieces do not reach an apex of the base portion opposite an opening of the accommodating groove at the one side.

7. The sealing apparatus according to claim 1 , wherein the outer periphery pressing pieces are circumferentially separated from one another, and wherein the inner periphery pressing pieces are circumferentially separated from one another.

8. The sealing apparatus according to claim 7 , wherein longitudinally extending gaps, extending along the axis, provide the circumferential separation between the outer periphery pressing pieces and the inner periphery pressing pieces, respectively.

9. The sealing apparatus according to claim 8 , wherein the longitudinally extending gaps between the outer periphery pressing pieces are arranged so as not to exact oppositely face the longitudinally extending gaps between the inner periphery extending pieces in a direction orthogonal to the axis.

10. The sealing apparatus according to claim 8 , wherein the longitudinally extending gaps open in a direction of the one side and reach an edge of the respective inner or outer periphery pressing portion at the one side.

11. The sealing apparatus according to claim 8 , wherein the cutouts at each of the respective inner and outer periphery pressing portions have the longitudinally extending gaps disposed circumferentially therebetween in an alternating arrangement.

12. The sealing apparatus according to claim 8 , wherein the cutouts do not connect with the longitudinally extending gaps at each of the respective inner and outer periphery pressing portions.

13. The sealing apparatus according to claim 8 , wherein at each of the respective inner and outer periphery pressing portions, the longitudinally extending gaps have a different shape than the respective cutouts.

Assignees

• Nok Corp

Inventors

• Tokunaga Wataru

Classifications

• F16J15/3212 Primary

  with metal springs · CPC title

• F16J15/3236

  with at least one lip for each surface, e.g. U-cup packings · CPC title

• F16J15/18 Primary

  with stuffing-boxes for elastic or plastic packings · CPC title