US3599820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High vacuum-sealing closure
Assignee: University of Kentucky Research Foundation
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Filing: 1969-07-22
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Granted: 1971-08-17
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Expires: 1989-07-22
Abstract
Abstract A means for sealing receptacles under a vacuum in the order of 10 6 mmHg includes dual O-rings mounted on a closure in spaced relation to each other and arranged for easy application of the closure to and removal from the receptacle. A stopper providing a sealed ground glass fit illustrates a use of the invention.
Inventors
- 👤 Kenneth P Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:03
CPC Classifications
B; B65; B65D; B65D39/00; B65D39/0005; B65D39/0047; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082; B01L3/50825; B65D2539/00; B65D2539/001; B65D2539/006; Y; Y10; Y10S; Y10S277/00; Y10S277/91; Y10S277/913
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
160 words
For use with a receptacle adapted for subjection to a high vacuum and having an access opening, a readily detachable closure having a first portion tapered insertable in the opening and with an outer wall configuration mating with the inner wall configuration of the opening, a second portion attached to said first portion and forming a head adapted to overlie the mouth of the opening and providing a main seal seat at the shoulder joining said first and second portions, a continuous peripheral groove extending about said first portion adjacent the distal end of the same and providing an initial seal seat, a first elastomeric O-ring having the major portion of its volume normally confined in said groove, and a second elastomeric O-ring in normally stretched condition disposed in contact with said shoulder, said second O-ring being adapted to be compressed upon its seat for backup sealing by ambient air pressure during the application of high vacuum to said receptacle.
Claim 2
Dependent Claim
160 words
For use with a receptacle adapted for subjection to a high vacuum and having an access opening, a readily detachable closure having a first portion tapered insertable in the opening and with an outer wall configuration mating with the inner wall configuration of the opening, a second portion attached to said first portion and forming a head adapted to overlie the mouth of the opening and providing a main seal seat at the shoulder joining said first and second portions, a continuous peripheral groove extending about said first portion adjacent the distal end of the same and providing an initial seal seat, a first elastomeric O-ring having the major portion of its volume normally confined in said groove, and a second elastomeric O-ring in normally stretched condition disposed in contact with said shoulder, said second O-ring being adapted to be compressed upon its seat for backup sealing by ambient air pressure during the application of high vacuum to said receptacle.
Claim 3
Dependent Claim
32 words
Apparatus as defined in claim 1 wherein at last about 90percent of the volume of said first O-ring is normally confined in said groove prior to application of vacuum to said receptacle.
Claim 4
Dependent Claim
31 words
Apparatus as defined in claim 1 wherein said second O-ring is free to expand laterally beneath said closure head as said closure is pushed into the access opening of said receptacle.
References Cited (Backward Citations)
US2946606A
Cited
US3017047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |