Patent US3821892A successfully refreshed from Google Patents.
US3821892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for tensile testing
Assignee: Individual
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Filing: 1972-07-21
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Granted: 1974-07-02
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Expires: 1992-07-21
Abstract
Abstract An apparatus for tensile testing, particularly for testing the adhesion of coatings of, e.g., paint, for testing adhesives, and for testing the cohesion of material, includes a pulling member for tearing off a test member adhesively secured to the test object, and a pressure rod with means for moving the rod relative to the pulling member, the pressure rod being pivotably connected to a yoke with two legs straddling the test member and resting on the surface of the test object on a line through the center of the test member when the apparatus is in use.
Inventors
- 👤 O Saberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:25
CPC Classifications
G; G01; G01N; G01N19/00; G01N19/04; G01N2203/00; G01N2203/003; G01N2203/0042; G01N2203/02; G01N2203/026; G01N2203/0262; G01N2203/0278; G01N2203/0282
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
In an apparatus for testing the tensile force required to pull off a test member adhesively fastened to a test object, particularly for testing the adhesion of coatings to surfaces, for testing adhesives, and for testing the cohesion of materials, said apparatus including a pulling member attachable to said test member, a pressure rod, means to move said pressure rod relative to said pulling member to cause said test member to be pulled from said test object, and means for determining the force required to pull said test member from said test object, the improvement comprising: a yoke in the form of an inverted U and having two downwardly extending legs, said legs when in use adapted to straddle said test member and contact said test object at points on a straight line through the center of said test member; and said pressure rod being pivotally connected at a first end thereof to said yoke.
Claim 2
Dependent Claim
155 words
In an apparatus for testing the tensile force required to pull off a test member adhesively fastened to a test object, particularly for testing the adhesion of coatings to surfaces, for testing adhesives, and for testing the cohesion of materials, said apparatus including a pulling member attachable to said test member, a pressure rod, means to move said pressure rod relative to said pulling member to cause said test member to be pulled from said test object, and means for determining the force required to pull said test member from said test object, the improvement comprising: a yoke in the form of an inverted U and having two downwardly extending legs, said legs when in use adapted to straddle said test member and contact said test object at points on a straight line through the center of said test member; and said pressure rod being pivotally connected at a first end thereof to said yoke.
Claim 3
Dependent Claim
123 words
The improvement claimed in claim 1, wherein said test member has a gripping head attached thereto by a neck portion; and said pulling member has a socket for gripping attachment to said gripping head, said socket having a radial slot therein, said slot having a width to fit said neck portion and a depth such that said test member is centered in said apparatus when said neck portion is inserted to the bottom of said slot; and further comprising a cap means having therein a slot with width and depth dimensions corresponding to those of said slot to said socket; said cap means being rigidly attachable to said socket of said pulling member for fixing said test member with respect to said socket.
Claim 4
Dependent Claim
93 words
The improvement claimed in claim 1, wherein said means to move comprises a pressure box having an upper part with means for connection to a source of pressurized gas, and a lower part attached to said pulling member, a second end of said pressure rod passing through said lower part into a space between said upper and lower parts; a thrust plate connected to said second end of said pressure rod and positioned in said space; and a resilient diaphragm clamped between said upper and lower parts and resting on said thrust plate.
Claim 5
Dependent Claim
34 words
The improvement claimed in claim 3, wherein said pressure rod below said lower part has a shoulder; and further comprising a helical spring surrounding said pressure rod between said lower part and said shoulder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |