Boot with O-ring seal
View Patent ↗A boot with O-ring seal for sealing around an article such as a universal joint housing includes a boot having a hollow body adapted to tightly receive the article. An O-ring extends lengthwise within an internal annular groove in the body. The O-ring, in its natural free state condition, has a radial dimension which is greater than the depth of the groove so that when the article is received in the body the O-ring is deformed and makes sealing contact with the article. The O-ring, in its natural free state condition, has an axial dimension which is less than the width of the groove by an amount such that when the article is received in the body and the O-ring makes sealing contact with the article, the O-ring is deformed into the space between the side walls of the groove.
1. A boot assembly for sealing around an article, comprising:
a boot having a hollow body with an axially extending circumferential inner surface portion operative to tightly engage the article when received in said body against said inner surface;
an internal annular groove of predetermined depth extending into said inner surface, said inner surface on either side of said grove lying substantially in a common plane when viewed in axial section;
an O-ring disposed in said groove and having a radial dimension in a natural free state condition which is greater than the depth of said groove such that a radially inner-most surface said O-ring is extended out of said groove beyond said plane of said inner surface of said body, said groove having side walls that are axially spaced relative to said O-ring such that said O-ring is deformable substantially fully into said space of said groove so that the radially inner most surface of said O-ring is positionable substantially in the plane of said inner surface of said boot.
2. The boot with O-ring seal of claim 1 , wherein said O-ring is formed separately from said boot.
3. The boot with O-ring seal of claim 2 , wherein said O-ring is circular in cross-section.
4. The boot with O-ring seal of claim 2 , wherein said O-ring is generally X-shaped in cross-section.
5. The boot with O-ring seal of claim 1 , wherein said O-ring is made of one piece with said boot.
6. The boot with O-ring seal of claim 5 , wherein said O-ring is half round in cross-section.
7. The boot with O-ring seal of claim 5 , wherein said O-ring is generally V-shaped in cross-section.
8. The boot with O-ring seal of claim 1 for sealing around a non-circular surface of an article such as a universal joint housing, wherein said hollow body has a non-circular circumferentially extending, annular inner surface portion corresponding in shape to the non-circular surface of the article and adapted to tightly receive the non-circular surface of the article, and said O-ring, in its natural free state condition, is of the same non-circular shape as said non-circular surface of the article when the article is tightly received in the body.
9. The boot with O-ring seal of claim 8 , wherein said annular groove is of the same non-circular shape as said non-circular surface of the article.
10. The boot with O-ring seal of claim 9 , wherein said O-ring is formed separately from said boot.