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EP0151050A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for the impregnation of porous articles
Assignee: Ultraseal International Ltd
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Filing: 1985-02-01
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Granted: —
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Expires: 2005-02-01
Abstract
Abstract A pressure vessel for use in impregnating porous articles comprising a support member for the articles, slidable between an upper position for degassing the articles and a lower position for impregnating the articles, a release mechanism operable from outside the pressure vessel to permit the support member to descend form the upper position to the lower position under gravity, and damping means at least partially within the pressure vessel for controlling descent of the support member.
Inventors
- 👤 Peter David Young
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 14:02
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/24; B22F3/26; B05; B05C; B05C3/00; B05C3/02; B22D; B22D31/00; B22D31/002; B22D31/005
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
76 words
A pressure vessel for use in impregnating porous articles comprising a support member for the articles, slidable between an upper position for degassing the articles and a lower position for impregnating the articles, a release mechanism operable from outside the pressure vessel to permit the support member to descend from the upper position to the lower position under gravity, and damping means at least partially within the pressure vessel for controlling descent of the support member.
Claim 2
Dependent Claim
76 words
A pressure vessel for use in impregnating porous articles comprising a support member for the articles, slidable between an upper position for degassing the articles and a lower position for impregnating the articles, a release mechanism operable from outside the pressure vessel to permit the support member to descend from the upper position to the lower position under gravity, and damping means at least partially within the pressure vessel for controlling descent of the support member.
Claim 3
Dependent Claim
21 words
A pressure vessel according to claim 1, wherein the damping means operates by flow of liquid impregnant through a restricted passage.
Claim 4
Dependent Claim
27 words
A pressure vessel according to claim 2, wherein the damping means is inoperative when the support member is raised from the lower position to the upper position.
Claim 5
Dependent Claim
38 words
A pressure vessel according to claim 2 or3 ; wherein the support member comprises a piston slidable in a tubular passage and the damping means comprises means restricting flow of impregnant from the tubular passage below the piston.
Claim 6
Dependent Claim
49 words
A pressure vessel according to claim 4, wherein the means restricting fluid are a passage in a shuttle member slidable in the tube below the piston, the shuttle member being movable upwardly under liquid pressure when the support member is raised from the lower position to the upper position.
Claim 7
Dependent Claim
21 words
A pressure vessel according to claim 1, 2, 3 or 4 wherein the damping means is wholly within the pressure vessel.
Claim 8
Dependent Claim
46 words
A pressure vessel according to claim 1, 2, 3 or 4, wherein the flow restricting means includes an external pressure line loop connecting the tubular passage below the piston to the main part of the pressure vessel and including flow regulating means and check valve means.
Claim 9
Dependent Claim
30 words
A pressure vessel according to any preceding claim, wherein the support member has a spring loaded mechanism for holding a cantilever arm on a basket containing articles to be impregnated.
Claim 10
Dependent Claim
24 words
A pressure vessel according to any preceding claim wherein the release mechanism comprises a catch for holding the support member in its upper position.
Claim 11
Dependent Claim
31 words
A pressure vessel according to claim 9, wherein the catch is connected to a rod extending through the vessel wall, a seal being provided to allow the vacuum to be drawn.
Claim 12
Dependent Claim
36 words
A pressure vessel according to claim 10, wherein the rod is spring loaded to urge the. catch to an engaged position and a lever is provided to permit it to be moved to a disengaged position.
Claim 13
Dependent Claim
56 words
A pressure vessel according to claim 1 or 2, wherein the support means comprises a pair of vertical tubes, a carriage slidable on the outside of the tubes and a piston slidable in each tube and connected to the carriage, and the damping means comprises means restricting flow of impregnant from the tubes below the pistons.
Claim 14
Dependent Claim
29 words
A pressure vessel according to claim 12, wherein hydraulic shock absorber means are provided on the outside of one or both tubes to limit downward movement of the carriage.
Claim 15
Dependent Claim
37 words
A pressure vessel according to claim 12 or 13, wherein the carriage may be held in an upper position by a spring loaded latch which may be tripped by a pin passing through the pressure vessel wall.
Claim 16
Dependent Claim
58 words
A pressure vessel according to claim 12, 13 or 14 which has a top part movable vertically away from a bottom part for loading and unloading, wherein the tubes extend into the top part and the top part has a member engageable with the carriage to lift it to an upper position as the top part is raised.
Claim 17
Independent Claim
82 words
A method of impregnating a porous article, wherein there is employed a pressure vessel according to any preceding claim and wherein the article or means for carrying the article is engaged with the support member, the pressure vessel is closed and a vacuum is drawn, the release mechanism is operated to lower the article into impregnant in the lower part of the vessel to effect impregnation, the vacuum is released and the vessel opened, and the article is withdrawn from the vessel.
References Cited (Backward Citations)
No citation records indexed.
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