The present invention relates to U-shaped cup seals.
A prior art U-cup piston seal reproduced from Doutt U.S. Pat. No. 3,576,153 is illustrated in
The area between the flanges 12 and 13 defines an annular groove 14 which extends well into the body of the annular U-cup piston seal.
The annular flange 13 is also angularly disposed sidewardly and radially of the piston seal and by still referring to
The piston seal 10 must be stretched and thereby distorted in placing it in the groove 16. When this occurs, the piston seal 10 assumes the configuration seen in
When the piston with the seals mounted thereon, as seen in
As noted above, the piston seal 10 must be stretched and thereby distorted in placing it in the groove 16. There are instances however where it is not possible, or not desirable, to stretch and distort a seal. Conventionally, U-shaped cup seals have not been available in these instances. It would therefore be desirable if a cup seal were available where is not possible or desirable to stretch or distort a seal, such as when the seal is to be installed into a deep recess.
Further, when seal stretching and distortion occurs, seal material selection is limited. For example, in hot water seal applications, rubber is often used for seals because it has the necessary high elongation and flexibility properties, but rubber is difficult to use in friction fit applications, and the rubber seal exposed to hot water can fuse to a metal seat area.
Disclosed is a U-shaped cup seal comprises an inner wall, an outer wall spaced apart from the inner wall, a base connecting the inner wall and the outer wall, a first end having a tab, and a tab receiving second end.
More particularly, disclosed is a U-shaped cup seal, the seal being annular and made of resilient material. The seal comprises an inner wall, an outer wall spaced apart from the inner wall, and a base connecting the inner wall and the outer wall. The seal has a first end having a tab extending from the base and between the inner and outer walls and beyond the first end, and a tab receiving second end. The tab has a top having a first outward extending protrusion, and a bottom having a second outward extending protrusion. The tab receiving second end has a first tab receiving protrusion on one of the inner and outer walls, extending toward the other wall, and a second tab receiving protrusion on the other wall, spaced apart from the first tab receiving protrusion, and extending toward the one wall.
Before one embodiment of the disclosure is explained in detail, ft is to be understood that the disclosure is not limited in its application to the details of the construction and the arrangements of components set forth in the following description or illustrated in the drawings. The disclosure is capable of other embodiments and of being practiced or being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. Use of “including” and “comprising” and variations thereof as used herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Use of “consisting of” and variations thereof as used herein is meant to encompass only the items listed thereafter and equivalents thereof. Further, it is to be understood that such terms as “forward”, “rearward”, “left”, “right”, “upward”, “downward”. “side”, “top” and “bottom”, etc., are words of convenience and are not to be construed as limiting terms.
Illustrated in
As illustrated in the drawings, the seal 100 is annular before and after the tab 116 is snapped into the tab receiving second end 120. Prior to the ends of the seal 100 being snapped together, the seal 100 can be flexed around an annular surface, such as shown in
More particularly, the tab 116 is lockable into the tab receiving second end 120, so the tab 116 has a top 128 having a first outward extending protrusion 132, as illustrated in
The U-shaped cup seal 100 of this disclosure provides a split ring with a closure mechanism that can be used in any seal application, but especially those where a seal is to be installed into a deep recess. And since the seal expands after exposure to process fluid pressure, its initial installation into an opening when not expanded is simpler. Further, since it does not have to be stretched or distorted, a wider selection of seal materials is available.
Various other features of this disclosure are set forth in the following claims.
Number | Name | Date | Kind |
---|---|---|---|
2723143 | Smith | Nov 1955 | A |
3124502 | Radke | Mar 1964 | A |
3576153 | Doutt | Apr 1971 | A |
3605201 | Peterson | Sep 1971 | A |
3642291 | Zeffer | Feb 1972 | A |
3861691 | Wheeler | Jan 1975 | A |
4255903 | Reynolds et al. | Mar 1981 | A |
4643440 | Massey, Jr. | Feb 1987 | A |
4650584 | Macierewicz | Mar 1987 | A |
5280927 | Greisinger | Jan 1994 | A |
5377999 | Gorman | Jan 1995 | A |
5597168 | Antonini | Jan 1997 | A |
5695201 | Wheeler | Dec 1997 | A |
6386548 | Grimanis | May 2002 | B1 |
6557857 | Goodman | May 2003 | B1 |
6726220 | Grimanis | Apr 2004 | B2 |
20120112421 | Sato | May 2012 | A1 |
20120326395 | McCarthy | Dec 2012 | A1 |
20160153563 | Bissoon | Jun 2016 | A1 |
Number | Date | Country |
---|---|---|
1535032 | Dec 1978 | GB |
Number | Date | Country | |
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20160334019 A1 | Nov 2016 | US |