US3608912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing means for valve stems
Assignee: Xomox Corp
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Filing: 1969-11-04
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Granted: 1971-09-28
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Expires: 1989-11-04
Abstract
Abstract A seal is formed between a liner sleeve, which surrounds part of a valve stem, and a body through which the valve stem extends, the seal comprising a plurality of O-rings with annular spacers therebetween always out of contact with the valve stem. The inner diameter of each of the annular spacers is greater than the outer diameter of the liner sleeve, so that there is no firm engagement therebetween, and each of the O-rings makes four-point contact with the spacers adjacent thereto, the body, and the liner sleeve, to produce a series of annular-spaced sealing zones.
Inventors
- 👤 Paul D Templin
- 👤 William G Sonderman
- 👤 Russell G Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:29
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/184; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
94 words
In a valve, the combination of: a valve body having a stemreceptive bore, and an actuating stem movable within said bore to position a valving member within the body; a preformed elongate cylindrical liner supported in said bore to surround a portion of said stem; a plurality of deformable rings surrounding the liner, a plurality of circular spacing rings loosely surrounding the liner interposed between the deformable rings and maintaining the deformable rings spaced from one another, the deformable rings imposing constrictive force thereon pressing the liner into annular sealing contact with said stem.
Claim 2
Dependent Claim
94 words
In a valve, the combination of: a valve body having a stemreceptive bore, and an actuating stem movable within said bore to position a valving member within the body; a preformed elongate cylindrical liner supported in said bore to surround a portion of said stem; a plurality of deformable rings surrounding the liner, a plurality of circular spacing rings loosely surrounding the liner interposed between the deformable rings and maintaining the deformable rings spaced from one another, the deformable rings imposing constrictive force thereon pressing the liner into annular sealing contact with said stem.
Claim 3
Dependent Claim
25 words
The valve as defined by claim 1, wherein said elongate cylindrical liner is formed of a material having self-lubricating, wear resistant, and corrosion resistant qualities.
Claim 4
Dependent Claim
21 words
The valve as defined by claim 1, wherein said liner is formed of a self-lubricating material of the class of polytetrafluoroethylene.
Claim 5
Dependent Claim
57 words
The valve as defined by claim 1, wherein said deformable rings are of resilient material; and meAns for applying compressive force to said deformable rings and said spacing rings, to spread at least some of the deformable rings into four-point contact with the liner, the spacing rings, and the body of the valve at the stem-receptive bore.
Claim 6
Dependent Claim
58 words
The valve as defined by claim 4, wherein the means last mentioned includes a slidable cylindrical gland having an inner end movable into compressive relationship with the spacing rings and said deformable rings, and means including a pressure ring and adjusting screws for advancing the inner end of the gland with selective force into the compressive relationship aforesaid.
Claim 7
Dependent Claim
40 words
The valve as defined by claim 4, wherein each of spacng spacing rings has an inner diameter greater than the outer diameter of the liner to the extent that said spacing rings apply no appreciable radial force to the liner.
Claim 8
Dependent Claim
17 words
The valve as defined by claim 4, wherein the deformable rings are of a resilient rubberlike material.
Claim 9
Dependent Claim
21 words
The valve as defined by claim 4, wherein said resilient deformable rings are compressed to assume a substantially rectangular cross section.
Claim 10
Dependent Claim
32 words
The valve as defined by claim 1, wherein the stem-receptive bore of the valve body has a base wall; and the liner includes an outwardly directed annular flange overlying said base wall.
Claim 11
Dependent Claim
38 words
The valve as defined by claim 9, wherein said spacing rings have an inner diameter greater than the outer diameter of the liner to the extent that said spacing rings apply no appreciable radial force to the liner.
Claim 12
Dependent Claim
30 words
The valve as defined by claim 10, wherein the spacing rings and the deformable rings are stacked upon the annular flange of the liner, to apply force to said flange.
Claim 13
Dependent Claim
20 words
The valve as defined by claim 11, wherein said elongate cylindrical liner is formed of a material having self-lubricating qualities.
Claim 14
Dependent Claim
43 words
The valve as defined by claim 1, wherein said liner includes a concentric extension cooperating with said liner to provide a well accommodating the deformable rings and the spacing rings, said concentric extension being closely fitted within the bore of the valve body.
Claim 15
Dependent Claim
23 words
The valve as defined by claim 13, wherein said liner and the cylindrical extension thereof are formed of a material having self-lubricating properties.
References Cited (Backward Citations)
US1958221A
Cited
US3489420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |