US3935884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Column packing device
Assignee: SmithKline Beecham Corp
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Filing: 1974-05-23
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Granted: 1976-02-03
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Expires: 1994-05-23
Abstract
Abstract A chromatographic column packing device comprising a drive plate for receiving column locating means, driving means slidably coupled to said drive plate through a drive shaft, cam following means carried by said drive plate cooperating with a supported climb-face cam, a rotatory member mounted on said drive shaft, a contact arm carried by said rotatory member and positioned for intermittent impact with a cooperating member mounted on a shaft supporting tappers, said tappers being resiliently biassed relative to a column, whereby a column may simultaneously be submitted to a vertical reciprocating motion combined with lateral vibration together with rotation. The device is particularly suitable for packing high pressure liquid chromatographic columns.
Inventors
- 👤 Heath Robin Hazelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:51
CPC Classifications
B; B65; B65B; B65B1/00; B65B1/20; B65B1/22
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
108 words
A chromatographic column packing device comprising a column drive plate, driving means slidably coupled to said drive plate for rotating said drive plate through a drive shaft, cam following means carried by said drive plate cooperating with a supported climb-face cam, a rotatory member mounted on said drive shaft, a contact arm carried by said rotatory member and positioned for intermittent impact with a cooperating member mounted on a shaft supporting tappers, said tappers being resiliently biassed relative to a column, whereby said drive plate may simultaneously be submitted to a vertical reciprocating motion while said shaft supporting said tappers may be intermittently rotated by said contact arm.
Claim 2
Dependent Claim
108 words
A chromatographic column packing device comprising a column drive plate, driving means slidably coupled to said drive plate for rotating said drive plate through a drive shaft, cam following means carried by said drive plate cooperating with a supported climb-face cam, a rotatory member mounted on said drive shaft, a contact arm carried by said rotatory member and positioned for intermittent impact with a cooperating member mounted on a shaft supporting tappers, said tappers being resiliently biassed relative to a column, whereby said drive plate may simultaneously be submitted to a vertical reciprocating motion while said shaft supporting said tappers may be intermittently rotated by said contact arm.
Claim 3
Dependent Claim
30 words
A device as claimed in claim 1, in which said drive shaft or an extension thereof is slidably located within and cooperates with a sleeve depending from said drive plate.
Claim 4
Dependent Claim
31 words
A device as claimed in claim 2, in which said sleeve includes means defining a longitudinal slot for cooperating with a peg mounted on said drive shaft or an extension thereof.
Claim 5
Dependent Claim
25 words
A device as claimed in claim 1, in which the cam following means comprises a member projecting radially from a side of said drive plate.
Claim 6
Dependent Claim
17 words
A device as claimed in claim 4, in which the cam following means comprises a roller bearing.
Claim 7
Dependent Claim
32 words
A device as claimed in claim 1, in which the rotatory member carries at least two contact arms extending radially around its circumference for intermittent and sequential impact with said cooperating member.
Claim 8
Dependent Claim
21 words
A device as claimed in claim 6, in which the rotatory member carries five contact arms regularly spaced around its circumference.
Claim 9
Dependent Claim
22 words
A device as claimed in claim 1, in which the cooperating member comprises an actuating arm coupled to said shaft supporting tappers.
Claim 10
Dependent Claim
37 words
A device as claimed in claim 8, in which said tappers are biassed away from and towards a column, received by said column locating means, as said actuating arm respectively engages and disengages with said contact arm.
Claim 11
Dependent Claim
33 words
A device as claimed in claim 1, in which the tappers are biassed against a column by a spring interconnecting a fixed point on a cam support with said shaft supporting the tappers.
Claim 12
Dependent Claim
17 words
A device as claimed in claim 1, in which a recess is provided in said drive plate.
Claim 13
Dependent Claim
13 words
A device as claim in claim 11, in which the recess is threaded.
Claim 14
Dependent Claim
103 words
In a chromatographic column packing machine which includes means for supporting a chromatographic column for rotating and vertical motion, the improvement of a chromatographic column drive plate, drive means for vertically moving and rotating said drive plate in order to rotate and vertically move the chromatographic column, and tapper means comprising a tapper shaft mounted for rotation and supporting a tapper member for impacting against said column, and means for intermittently rotating said tapper shaft in a first direction less than a complete revolution and thereafter releasing said tapper shaft to permit it to rotate in a direction opposite to said first direction.
Claim 15
Dependent Claim
103 words
In a chromatographic column packing machine which includes means for supporting a chromatographic column for rotating and vertical motion, the improvement of a chromatographic column drive plate, drive means for vertically moving and rotating said drive plate in order to rotate and vertically move the chromatographic column, and tapper means comprising a tapper shaft mounted for rotation and supporting a tapper member for impacting against said column, and means for intermittently rotating said tapper shaft in a first direction less than a complete revolution and thereafter releasing said tapper shaft to permit it to rotate in a direction opposite to said first direction.
Claim 16
Dependent Claim
26 words
In the machine of claim 13 in which means is provided for causing said tapper shaft to rotate in said direction opposite to said first direction.
References Cited (Backward Citations)
US3838716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |