Patent US4133094A successfully refreshed from Google Patents.
US4133094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of joining a tank and skirt support together
Assignee: Chicago Bridge and Iron Co
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Filing: 1977-08-22
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Granted: 1979-01-09
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Expires: 1997-08-22
Abstract
Abstract A method of supporting a metal tank having a circular horizontal section which comprises providing the tank with a horizontal ring-like portion having a substantially upright surface, forming a metal substantially upright skirt having a top portion with an internal surface which matches the tank ring-like surface and which has an internal diameter at ambient temperature at matching locations slightly less than the diameter of the tank ring-like surface at ambient temperature, heating the skirt top portion, or cooling the tank ring-like surface, or both until the internal diameter of the skirt top portion is larger than the diameter of the tank ring-like surface, positioning the skirt top portion around the tank ring-like surface, bringing the skirt top portion or the tank ring-like surface or both to ambient temperature to thereby shrink-fit them together, and joining the skirt top portion to the tank by welds, bolts or rivets. A metal tank having a circular horizontal section, the tank having a horizontal ring-like portion having a substantially upright surface, and a metal substantially upright skirt having a top portion with an internal surface which matches the tank ring-like surface shrink-fitted around and in contact with the tank ring-like surface.
Inventors
- 👤 Donald C. Stafford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:32
CPC Classifications
B; B23; B23K; B23K37/00; B23K37/04; B23K37/0417; Y; Y10; Y10S; Y10S29/00; Y10S29/035; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T29/49947; Y10T29/49948; Y10T29/49954; Y10T29/49956
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
148 words
A method of supporting a metal tank having a circular horizontal section which comprises: providing the tank with a horizontal ring-like portion having a substantially upright surface, forming a metal substantially upright skirt having a top portion with an internal surface which matches the tank ring-like surface and which has an internal diameter at ambient temperature at matching locations slightly less than the diameter of the tank ring-like surface at ambient temperature, heating the skirt top portion, or cooling the tank ring-like surface, or both until the internal diameter of the skirt top portion is larger than the diameter of the tank ring-like surface, positioning the skirt top portion around the tank ring-like surface, bringing the skirt top portion or the tank ring-like surface or both to ambient temperature to thereby shrink-fit them together, and joining the skirt top portion to the tank by welds, bolts or rivets.
Claim 2
Independent Claim
148 words
A method of supporting a metal tank having a circular horizontal section which comprises: providing the tank with a horizontal ring-like portion having a substantially upright surface, forming a metal substantially upright skirt having a top portion with an internal surface which matches the tank ring-like surface and which has an internal diameter at ambient temperature at matching locations slightly less than the diameter of the tank ring-like surface at ambient temperature, heating the skirt top portion, or cooling the tank ring-like surface, or both until the internal diameter of the skirt top portion is larger than the diameter of the tank ring-like surface, positioning the skirt top portion around the tank ring-like surface, bringing the skirt top portion or the tank ring-like surface or both to ambient temperature to thereby shrink-fit them together, and joining the skirt top portion to the tank by welds, bolts or rivets.
Claim 3
Dependent Claim
32 words
A method according to claim 1 in which the tank ring-like portion surface is convex and the skirt top portion internal surface is concave and nests with the said tank convex surface.
Claim 4
Independent Claim
133 words
A method of supporting a metal tank having a circular horizontal section which comprises: providing the tank with a vertical cylindrical surface, forming a metal substantially upright skirt having a top portion with an internal diameter at ambient temperature slightly less than the diameter of the tank vertical cylindrical surface at ambient temperature, heating the skirt top portion, or cooling the tank vertical cylindrical surface, or both until the internal diameter of the skirt top portion is larger than the diameter of the tank vertical cylindrical surface, positioning the skirt top portion around the tank vertical cylindrical surface, bringing the skirt top portion or the tank vertical cylindrical surface or both to ambient temperature to thereby shrink-fit them together, and joining the skirt top portion to the tank by welds, bolts or rivets.
Claim 5
Independent Claim
133 words
A method of supporting a metal tank having a circular horizontal section which comprises: providing the tank with a vertical cylindrical surface, forming a metal substantially upright skirt having a top portion with an internal diameter at ambient temperature slightly less than the diameter of the tank vertical cylindrical surface at ambient temperature, heating the skirt top portion, or cooling the tank vertical cylindrical surface, or both until the internal diameter of the skirt top portion is larger than the diameter of the tank vertical cylindrical surface, positioning the skirt top portion around the tank vertical cylindrical surface, bringing the skirt top portion or the tank vertical cylindrical surface or both to ambient temperature to thereby shrink-fit them together, and joining the skirt top portion to the tank by welds, bolts or rivets.
Claim 6
Dependent Claim
36 words
A method according to claim 3 including making the tank surface depending downwardly from the tank vertical cylindrical surface of decreasing diameter to form a guide surface for positioning the skirt top portion on the tank.
Claim 7
Dependent Claim
29 words
A method according to claim 3 including making the tank with a horizontal metal ring thicker than the tank and with the tank vertical cylindrical surface on the ring.
Claim 8
Dependent Claim
28 words
A method according to claim 3 including making the tank with a horizontal metal ring thicker than, and above, the tank portion containing the tank vertical cylindrical surface.
Claim 9
Dependent Claim
22 words
A method according to claim 3 including making the top portion of the skirt thicker than the portion of the skirt therebelow.
Claim 10
Independent Claim
157 words
A method of supporting a metal tank having a circular horizontal section which comprises: providing the tank with a vertical cylindrical surface with a lateral or radial extension at the top, forming a metal substantially upright skirt having a top portion with an internal diameter at ambient temperature slightly less than the diameter of the tank vertical cylindrical surface at ambient temperature, heating the skirt top portion, or cooling the tank vertical cylindrical surface, or both until the internal diameter of the skirt top portion is larger than the diameter of the tank vertical cylindrical surface, positioning the skirt top portion around the tank vertical cylindrical surface with the top of the skirt in contact with the lateral extension of the tank, bringing the skirt top portion or the tank vertical cylindrical surface or both to ambient temperature to thereby shrink-fit them together, and joining the skirt top portion to the tank by welds, bolts or rivets.
Claim 11
Independent Claim
157 words
A method of supporting a metal tank having a circular horizontal section which comprises: providing the tank with a vertical cylindrical surface with a lateral or radial extension at the top, forming a metal substantially upright skirt having a top portion with an internal diameter at ambient temperature slightly less than the diameter of the tank vertical cylindrical surface at ambient temperature, heating the skirt top portion, or cooling the tank vertical cylindrical surface, or both until the internal diameter of the skirt top portion is larger than the diameter of the tank vertical cylindrical surface, positioning the skirt top portion around the tank vertical cylindrical surface with the top of the skirt in contact with the lateral extension of the tank, bringing the skirt top portion or the tank vertical cylindrical surface or both to ambient temperature to thereby shrink-fit them together, and joining the skirt top portion to the tank by welds, bolts or rivets.
Claim 12
Dependent Claim
36 words
A method according to claim 6 including making the tank surface depending downwardly from the tank vertical cylindrical surface of decreasing diameter to form a guide surface for positioning the skirt top portion on the tank.
Claim 13
Dependent Claim
29 words
A method according to claim 6 including making the tank with a horizontal metal ring thicker than the tank and with the tank vertical cylindrical surface on the ring.
Claim 14
Dependent Claim
17 words
A method according to claim 8 including making the lateral extension an integral part of the ring.
Claim 15
Dependent Claim
28 words
A method according to claim 6 including making the tank with a horizontal metal ring thicker than and above the tank portion containing the tank vertical cylindrical surface.
Claim 16
Dependent Claim
22 words
A method according to claim 6 including making the top portion of the skirt thicker than the portion of the skirt therebelow.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |