US4196844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closing structure for centrifuge vacuum chamber
Assignee: Beckman Coulter Inc
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Filing: 1979-03-15
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Granted: 1980-04-08
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Expires: 1999-03-15
Abstract
Abstract A closing structure for the top of a centrifuge chamber comprising a door which is slidable horizontally toward and away from closed position, a retaining member above the door which permits a limited upward movement of the door, side members which surround the closed door on three sides to contain shrapnel from a rotor failure, and a flange extending downwardly from the door on its fourth side to contain shrapnel.
Inventors
- 👤 Kenneth E. Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:46
CPC Classifications
B; B04; B04B; B04B15/00; B04B15/08; B04B7/00; B04B7/02; B04B7/06; B04B2007/065
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
151 words
In a closure for a centrifuge vacuum chamber having an opening at the top and a horizontally movable door for closing the opening during operation of the centrifuge, means for preventing the escape of fragments created if an explosion occurs in the chamber, comprising: a fixed wall structure extending upwardly from the top of the chamber to substantially surround the closed door on three sides, while permitting it to be moved horizontally through the open side toward and away from its closed position; a fixed retaining member extending horizontally above the door to limit upward movement of the door if it should be forced up from its closed position; and a flange carried by the door and located at the open side of the wall structure, said flange overlying the top of the chamber by an amount greater than the distance between the top of the door and the retaining member.
Claim 2
Dependent Claim
151 words
In a closure for a centrifuge vacuum chamber having an opening at the top and a horizontally movable door for closing the opening during operation of the centrifuge, means for preventing the escape of fragments created if an explosion occurs in the chamber, comprising: a fixed wall structure extending upwardly from the top of the chamber to substantially surround the closed door on three sides, while permitting it to be moved horizontally through the open side toward and away from its closed position; a fixed retaining member extending horizontally above the door to limit upward movement of the door if it should be forced up from its closed position; and a flange carried by the door and located at the open side of the wall structure, said flange overlying the top of the chamber by an amount greater than the distance between the top of the door and the retaining member.
Claim 3
Dependent Claim
107 words
A closure structure, for a centrifuge chamber having an opening at the top, comprising: a cover movable in a generally horizontal direction toward and away from said opening; a fixed retaining member above the cover which permits a limited upward movement of the cover; fixed containment means on three sides of the closed cover for preventing horizontal escape of fragments from the chamber if a structural failure occurs; and movable containment means at the fourth side of the closed cover for preventing horizontal escape of fragments, said movable means being supported by and movable with the cover as it is moved between its opened and closed positions.
Claim 4
Dependent Claim
107 words
A closure structure, for a centrifuge chamber having an opening at the top, comprising: a cover movable in a generally horizontal direction toward and away from said opening; a fixed retaining member above the cover which permits a limited upward movement of the cover; fixed containment means on three sides of the closed cover for preventing horizontal escape of fragments from the chamber if a structural failure occurs; and movable containment means at the fourth side of the closed cover for preventing horizontal escape of fragments, said movable means being supported by and movable with the cover as it is moved between its opened and closed positions.
Claim 5
Dependent Claim
34 words
The closure structure of claim 2 wherein the fixed containment means comprises three bars which lie on top of the chamber along three edges thereof and which provide support for the fixed retaining member.
Claim 6
Dependent Claim
45 words
The closure structure of claim 2 wherein the movable containment means is a downwardly extending flange which overlies the nearest side of the chamber by an amount exceeding the distance between the top of the cover and the adjacent surface of the fixed retaining member.
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) | 1983-04-08 | 1983-10-08 | 1984-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-08 | 1987-10-08 | 1988-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-08 | 1991-10-08 | 1992-04-08 | $7700.00 | Window Closed / Lapsed |