US4586371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for adhesion testing of coatings
Assignee: Elcometer Instruments Ltd
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Filing: 1984-11-07
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Granted: 1986-05-06
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Expires: 2004-11-07
Abstract
Abstract An apparatus for applying a consistently perpendicular tension force to a dolly is provided for testing of the adhesive bond strength between a coating and a substrate. The tester comprises a ram passing through an axially centered opening in a dolly bonded to the coating. Piston and cylinder means are associated with the ram and the dolly so that pressure within the piston chamber formed thereby causes the development of a tension force within the dolly which is perpendicular to the coating being tested because of its coaxially centered orientation with respect to the ram.
Inventors
- 👤 Randall G. Ivie
- 👤 William H. Thomason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:58
CPC Classifications
G; G01; G01N; G01N19/00; G01N19/04; G01N2203/00; G01N2203/02; G01N2203/026; G01N2203/0262; G01N2203/0278; G01N2203/0282
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
161 words
An apparatus for measuring and testing adhesive bonding strength of a coating to a substrate in a tensile mode comprising a dolly having an axially centered opening passing therethrough, said dolly having a bonding surface conforming to a surface of said coating; bonding means for adhering said dolly bonding surface to said coating surface, said bonding means having an adhesive bond strength in excess of a bonding strength of an adhesive bond between said coating and said substrate; ram means passing through said axially centered opening in said dolly, said ram means adapted for engagement against a centered portion of said coating surface bonded to said dolly; piston means attached to one of said ram and said dolly and cylinder means attached to the other of said ram and said dolly for forcing said ram into pressure abutment against said coating surface and for placing said dolly, said bonding means and said coating in tension, and means for determining said tension.
Claim 2
Independent Claim
161 words
An apparatus for measuring and testing adhesive bonding strength of a coating to a substrate in a tensile mode comprising a dolly having an axially centered opening passing therethrough, said dolly having a bonding surface conforming to a surface of said coating; bonding means for adhering said dolly bonding surface to said coating surface, said bonding means having an adhesive bond strength in excess of a bonding strength of an adhesive bond between said coating and said substrate; ram means passing through said axially centered opening in said dolly, said ram means adapted for engagement against a centered portion of said coating surface bonded to said dolly; piston means attached to one of said ram and said dolly and cylinder means attached to the other of said ram and said dolly for forcing said ram into pressure abutment against said coating surface and for placing said dolly, said bonding means and said coating in tension, and means for determining said tension.
Claim 3
Dependent Claim
15 words
The apparatus as set forth in claim 1 wherein said dolly is cylindrical in form.
Claim 4
Dependent Claim
29 words
The apparatus as set forth in claim 1 wherein said means for determining said tension comprises a gauge for measuring pressure between said piston means and said cylinder means.
Claim 5
Dependent Claim
21 words
The apparatus as set forth in claim 3 further including means for providing hydraulic pressure to said piston and cylinder means.
Claim 6
Dependent Claim
23 words
The apparatus as set forth in claim 3 further including gas compressor means for providing compressed gas to said piston and cylinder means.
Claim 7
Dependent Claim
16 words
The apparatus as set forth in claim 1 wherein said bonding means is an epoxy resin.
Claim 8
Dependent Claim
16 words
The apparatus as set forth in claim 1 wherein said bonding means is a cyanoacrylate resin.
Claim 9
Dependent Claim
19 words
The apparatus as set forth in claim 1 wherein said bonding surface of said dolly is planar in form.
Claim 10
Dependent Claim
30 words
The apparatus as set forth in claim 1 wherein said bonding surface of said dolly is curved to conform with a curvature of a cylindrical-shaped substrate having said coating thereon.
References Cited (Backward Citations)
US3527093A
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US3577775A
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US3628378A
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US3821892A
Cited
GB1455534A
Cited
SU642630A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |