US3658290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating glass plug for stopcock assembly
Assignee: Individual
•
Filing: 1970-12-14
•
Granted: 1972-04-25
•
Expires: 1990-12-14
Abstract
Abstract A floating glass plug for a stopcock is employed in a high vacuum. The glass plug is spaced from the stopcock barrel by Oring seals and a threaded sleeve of teflon, nylon, etc. The glass plug is less expensive than one constructed solely of teflon or of ground glass, and is considerably more effective in service.
Inventors
- 👤 Eugene R Peters
- 👤 Walter H Rutherford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:11
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38; F16K27/00; F16K27/02; F16K27/0254; Y; Y10; Y10S; Y10S251/00; Y10S251/902; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87788
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
96 words
A stopcock assembly comprising: a glass barrel, having inlet and outlet tubes, a sidewall portion, and a glass plug therefor; the plug being spaced from the internal sidewall of the barrel, and provided with a dimensionally stable polymeric threaded portion to engage and effect a low friction surface with the barrel upon rotation therewith; and O-rings positioned on the plug to provide a seal in the sidewall space between the inlet and the outlet tubes and a seal between the said tubes and the polymeric threaded portion upon axial movement of the plug along the barrel.
Claim 2
Dependent Claim
96 words
A stopcock assembly comprising: a glass barrel, having inlet and outlet tubes, a sidewall portion, and a glass plug therefor; the plug being spaced from the internal sidewall of the barrel, and provided with a dimensionally stable polymeric threaded portion to engage and effect a low friction surface with the barrel upon rotation therewith; and O-rings positioned on the plug to provide a seal in the sidewall space between the inlet and the outlet tubes and a seal between the said tubes and the polymeric threaded portion upon axial movement of the plug along the barrel.
Claim 3
Dependent Claim
29 words
The stopcock of claim 1 in which the coefficient of expansion of the glass plug varies from about 5.5 X 10 7 to about 1.25 X 10 5/* C.
Claim 4
Dependent Claim
13 words
The stopcock assembly of claim 2 in which the glass plug is molded.
Claim 5
Dependent Claim
29 words
The stopcock assembly of claim 3 in which the the glass of the said plug is selected from the group consisting of pyrex, quartz, Vycor, fused silica and pyroceram.
Claim 6
Dependent Claim
99 words
A stopcock assembly comprising: a glass barrel, having inlet and outlet tubes, a sidewall portion, having internal threads thereon, and a glass plug therefor: the plug being spaced from the internal sidewall of the barrel, and provided with a dimensionally stable polymeric threaded portion to effect a low friction surface with the threads of the barrel upon rotation therewith; and O-rings positioned on the plug to provide a vacuum seal in the sidewall space between the inlet and outlet tubes and between the said tubes and the polymeric threaded portion upon axial movement of the plug along the barrel.
Claim 7
Dependent Claim
99 words
A stopcock assembly comprising: a glass barrel, having inlet and outlet tubes, a sidewall portion, having internal threads thereon, and a glass plug therefor: the plug being spaced from the internal sidewall of the barrel, and provided with a dimensionally stable polymeric threaded portion to effect a low friction surface with the threads of the barrel upon rotation therewith; and O-rings positioned on the plug to provide a vacuum seal in the sidewall space between the inlet and outlet tubes and between the said tubes and the polymeric threaded portion upon axial movement of the plug along the barrel.
Claim 8
Dependent Claim
30 words
The stopcock assembly of claim 5 in which the coefficient of expansion of the glass plug varies from about 5.5 X 10 7 to about 1.25 X 10 5/* C.
Claim 9
Dependent Claim
13 words
The stopcock assembly of claim 6 in which the glass plug is molded.
Claim 10
Dependent Claim
28 words
The stopcock assembly of claim 7 in which the glass of the said plug is selected from the group consisting of pyrex, quartz, Vycor, fused silica and pyroceram.
Claim 11
Dependent Claim
92 words
A glass plug for a stopcock assembly comprising: a round, molded glass cylindrical-shaped lower body plug portion; an upper portion comprising a handle for moving said plug; a dimensionally stable polymeric insert disposed about said plug for engaging a glass stopcock barrel; and O-rings mounted on said body portion; the plug being shaped to provide a space between the barrel and being adapted to compress the O-rings into the space between the body portion and barrel and provide a seal therebetween when the plug is moved axially along and engages the barrel.
Claim 12
Dependent Claim
92 words
A glass plug for a stopcock assembly comprising: a round, molded glass cylindrical-shaped lower body plug portion; an upper portion comprising a handle for moving said plug; a dimensionally stable polymeric insert disposed about said plug for engaging a glass stopcock barrel; and O-rings mounted on said body portion; the plug being shaped to provide a space between the barrel and being adapted to compress the O-rings into the space between the body portion and barrel and provide a seal therebetween when the plug is moved axially along and engages the barrel.
Claim 13
Dependent Claim
31 words
The plug of claim 9 in which the coefficient of expansion of the said glass body portion varies from about 5.5 X 10 7 to about 1.25 X 10 5/* C.
Claim 14
Dependent Claim
103 words
A stopcock assembly comprising: a glass barrel having inlet and outlet tubes, a sidewall barrel portion and a floating glass plug therefor; the plug being spaced from the internal sidewall of the barrel by a sleeve and by O-rings both mounted on said plug; the said sleeve being composed of a dimensionally stable polymeric material adapted to engage the barrel and effect a low friction surface therewith; the said O-rings being positioned on the plug to provide, upon compression, a seal in the sidewall space between the inlet and outlet tubes, and to provide, a seal between the said tubes and the sleeve.
Claim 15
Dependent Claim
103 words
A stopcock assembly comprising: a glass barrel having inlet and outlet tubes, a sidewall barrel portion and a floating glass plug therefor; the plug being spaced from the internal sidewall of the barrel by a sleeve and by O-rings both mounted on said plug; the said sleeve being composed of a dimensionally stable polymeric material adapted to engage the barrel and effect a low friction surface therewith; the said O-rings being positioned on the plug to provide, upon compression, a seal in the sidewall space between the inlet and outlet tubes, and to provide, a seal between the said tubes and the sleeve.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |