US4355664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for internal pipe protection
Assignee: Memry Corp
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Filing: 1980-07-31
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Granted: 1982-10-26
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Expires: 2000-07-31
Abstract
Abstract A method and device for providing a protective coating for the inside of pipes, said method utilizing a device which is remotely actuated from outside said pipes. Specifically, the device comprises a memory metal delivery member, a corrosion resistant liner member, and a bonding member, said device expanding upon application of heat toward the inner wall of the pipe to cause the bonding member to flow progressively between the liner member and the inside of the pipe to thereby preclude air entrapment and to bond said liner member to the inside of the pipe.
Inventors
- 👤 Paul M. Cook
- 👤 Richard F. Otte
- 👤 James L. Claypool
- 👤 Lawrence J. White
- 👤 Harry C. Broyles
- 👤 Peter L. Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:42
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/20; F16L47/22; F16L58/00; F16L58/18; F16L58/181; Y; Y10; Y10S; Y10S138/00; Y10S138/06; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
202 words
A device for protecting the inside of a pipe, the pipe comprising a cylindrical member, said device comprising: tubular delivery means, said delivery means being generally frustro-conical in shape and having a radially continuous sidewall which is cage-like with a plurality of slots therein, said delivery means being flexible in both radial and axial directions, said delivery means being capable of radial expansion upon application of heat; tubular liner means outside of and in contact with said delivery means, said liner means being generally frustro-conical in shape, corrosion resistant and deformable substantially only radially upon application of heat; and bonding means outside of and in contact with said liner means to bond said liner means to the inside surface of a cylindrical pipe, said bonding means being flowable and activated by application of heat, said delivery means expanding radially upon application of heat uniformly along the length of the device, the radial expansion of the frustro-conical shaped delivery and liner means causing said bonding means to progressively contact the inside of a cylindrical pipe and to flow progressively axially along the outer surface of said liner means to preclude air entrapment between said liner means and the inside of a cylindrical pipe.
Claim 2
Independent Claim
202 words
A device for protecting the inside of a pipe, the pipe comprising a cylindrical member, said device comprising: tubular delivery means, said delivery means being generally frustro-conical in shape and having a radially continuous sidewall which is cage-like with a plurality of slots therein, said delivery means being flexible in both radial and axial directions, said delivery means being capable of radial expansion upon application of heat; tubular liner means outside of and in contact with said delivery means, said liner means being generally frustro-conical in shape, corrosion resistant and deformable substantially only radially upon application of heat; and bonding means outside of and in contact with said liner means to bond said liner means to the inside surface of a cylindrical pipe, said bonding means being flowable and activated by application of heat, said delivery means expanding radially upon application of heat uniformly along the length of the device, the radial expansion of the frustro-conical shaped delivery and liner means causing said bonding means to progressively contact the inside of a cylindrical pipe and to flow progressively axially along the outer surface of said liner means to preclude air entrapment between said liner means and the inside of a cylindrical pipe.
Claim 3
Independent Claim
197 words
A device for protecting the inside of a pipe, the pipe comprising a cylindrical member, said device comprising: tubular delivery means, said delivery means being generally barrel-shaped and having a radially continuous sidewall which is cage-like with a plurality of slots therein, said delivery means being flexible in both radial and axial directions, said delivery means being capable of radial expansion upon application of heat; tubular liner means outside of and in contact with said delivery means, said liner means being generally barrel-shaped, corrosion resistant and deformable substantially only radially upon application of heat; and bonding means outside of and in contact with said liner means to bond said liner means to the inside surface of a cylindrical pipe, said bonding means being flowable and activated by application of heat, said delivery means expanding radially upon application of heat uniformly along the length of the device, the radial expansion of the barrel-shaped delivery and liner means causing said bonding means to progressively contact the inside of a cylindrical pipe and to flow progressively axially along the outer surface of said liner means to preclude air entrapment between said liner means and the inside of a cylindrical pipe.
Claim 4
Independent Claim
197 words
A device for protecting the inside of a pipe, the pipe comprising a cylindrical member, said device comprising: tubular delivery means, said delivery means being generally barrel-shaped and having a radially continuous sidewall which is cage-like with a plurality of slots therein, said delivery means being flexible in both radial and axial directions, said delivery means being capable of radial expansion upon application of heat; tubular liner means outside of and in contact with said delivery means, said liner means being generally barrel-shaped, corrosion resistant and deformable substantially only radially upon application of heat; and bonding means outside of and in contact with said liner means to bond said liner means to the inside surface of a cylindrical pipe, said bonding means being flowable and activated by application of heat, said delivery means expanding radially upon application of heat uniformly along the length of the device, the radial expansion of the barrel-shaped delivery and liner means causing said bonding means to progressively contact the inside of a cylindrical pipe and to flow progressively axially along the outer surface of said liner means to preclude air entrapment between said liner means and the inside of a cylindrical pipe.
Claim 5
Independent Claim
197 words
A device for protecting the inside of a pipe, the pipe comprising a cylindrical member, said device comprising: tubular delivery means, said delivery means being generally bell-shaped and having a radially continuous sidewall which is cage-like with a plurality of slots therein, said delivery means being flexible in both radial and axial directions, said delivery means being capable of radial expansion upon application of heat; tubular liner means outside of and in contact with said delivery means, said liner means being generally bell-shaped, corrosion resistant and deformable substantially only radially upon application of heat; and bonding means outside of and in contact with said liner means to bond said liner means to the inside surface of a cylindrical pipe, said bonding means being flowable and activated by application of heat, said delivery means expanding radially upon application of heat uniformly along the length of the device, the radial expansion of the bell-shaped delivery and liner means causing said bonding means to progressively contact the inside of a cylindrical pipe and to flow progressively axially along the outer surface of said liner means to preclude air entrapment between said liner means and the inside of a cylindrical pipe.
Claim 6
Independent Claim
197 words
A device for protecting the inside of a pipe, the pipe comprising a cylindrical member, said device comprising: tubular delivery means, said delivery means being generally bell-shaped and having a radially continuous sidewall which is cage-like with a plurality of slots therein, said delivery means being flexible in both radial and axial directions, said delivery means being capable of radial expansion upon application of heat; tubular liner means outside of and in contact with said delivery means, said liner means being generally bell-shaped, corrosion resistant and deformable substantially only radially upon application of heat; and bonding means outside of and in contact with said liner means to bond said liner means to the inside surface of a cylindrical pipe, said bonding means being flowable and activated by application of heat, said delivery means expanding radially upon application of heat uniformly along the length of the device, the radial expansion of the bell-shaped delivery and liner means causing said bonding means to progressively contact the inside of a cylindrical pipe and to flow progressively axially along the outer surface of said liner means to preclude air entrapment between said liner means and the inside of a cylindrical pipe.
Claim 7
Independent Claim
192 words
A device for protecting the inside of a pipe, the pipe comprising a cylindrical member: said device comprising; tubular delivery means, said delivery means having a radially continuous sidewall which is cage-like with a plurality of slots therein, said delivery means being flexible in both radial and axial directions, said delivery means having axially progressive radial expansion means upon application of heat; tubular liner means outside of and in contact with said delivery means, said liner means being corrosion resistant and deformable substantially only radially upon application of heat; and bonding means outside of and in contact with said liner means to bond said liner means to the inside surface of a cylindrical pipe, said bonding means being flowable and activated by application of heat, said delivery means expanding radially upon application of heat progressively axially along the length of the device, the radial expansion of the delivery and liner means causing said bonding means to progressively contact the inside of a cylindrical pipe and to flow progressively axially along the outer surface of said liner means to preclude air entrapment between said liner means and the inside of a cylindrical pipe.
Claim 8
Independent Claim
192 words
A device for protecting the inside of a pipe, the pipe comprising a cylindrical member: said device comprising; tubular delivery means, said delivery means having a radially continuous sidewall which is cage-like with a plurality of slots therein, said delivery means being flexible in both radial and axial directions, said delivery means having axially progressive radial expansion means upon application of heat; tubular liner means outside of and in contact with said delivery means, said liner means being corrosion resistant and deformable substantially only radially upon application of heat; and bonding means outside of and in contact with said liner means to bond said liner means to the inside surface of a cylindrical pipe, said bonding means being flowable and activated by application of heat, said delivery means expanding radially upon application of heat progressively axially along the length of the device, the radial expansion of the delivery and liner means causing said bonding means to progressively contact the inside of a cylindrical pipe and to flow progressively axially along the outer surface of said liner means to preclude air entrapment between said liner means and the inside of a cylindrical pipe.
Claim 9
Independent Claim
37 words
A device as in claims 1, 2, 3 or 4 wherein said delivery means is a member of memory metal, said member being coated with a corrosion resistant material, and said member expanding generally radially upon heating.
Claim 10
Dependent Claim
34 words
A device as in claim 1, 2, 3 or 4 wherein the liner means comprises a crosslinked polymeric material, said liner means radially constraining said delivery means before heat is applied to said device.
Claim 11
Dependent Claim
47 words
A device as in claim 6 wherein said bonding means and said liner means comprise an integral layer of polymeric material, said liner means defining an inside region of said layer which is substantially crosslinked and said bonding means defining an outside region which is substantially non-crosslinked.
Claim 12
Dependent Claim
38 words
A device as in claim 1, 2, 3 or 4 further comprising a positioning means contacting said device to move said device from a remote position to an activating position where said device is heated and thus expanded.
Claim 13
Dependent Claim
31 words
A device as in claim 6 wherein said delivery means is a member of memory metal which expands generally radially upon heating, said member being coated with a corrosion resistant material.
Claim 14
Dependent Claim
20 words
A device as in claim 1, 2, 3 or 4 wherein said delivery means is bonded to said liner means.
References Cited (Backward Citations)
US2415912A
Cited
US3135047A
Cited
GB1116879A
Cited
US4206786A
Cited
US3415544A
Cited
US3508766A
Cited
US3758361A
Cited
US3817805A
Cited
US4042559A
Cited
US4207364A
Cited
US3799584A
Cited
US3890483A
Cited
US3965555A
Cited
AU7415374A
Cited
US3968552A
Cited
US3915478A
Cited
GB1554431A
Cited
US4026583A
Cited
US4245674A
Cited
US4197880A
Cited
FR2370225A1
Cited
US4237609A
Cited
FR2438788B3
Cited
US4295494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |