US3686933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material tester
Assignee: Individual
•
Filing: 1969-10-28
•
Granted: 1972-08-29
•
Expires: 1989-10-28
Abstract
Abstract A material tester, particularly a tester for measuring the plasticity and curing speed of plastic materials, comprises a plunger mould with a device for developing pressure in the mould and a rotor, connected with a torquemeter. The mould contains cavities, filled with the material to be tested, one being used for determining the technological properties of the material, while samples are simultaneously moulded in others for their subsequent service testing.
Inventors
- 👤 Anatoly Danilovich Sokolov
- 👤 Nikolai Nikiforovich Danilkin
- 👤 Ivan Fedorovich Kanavets
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:26
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/10; G01N11/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
187 words
A material tester for plastic materials, said tester comprising: a plunger mould provided with a main cavity filled with a material to be subjected to physical testing, and additional cavities filled with the same material and in which, simultaneously with the physical testing of the material, additional samples are moulded under non-shear conditions for subsequent testing: means for developing pressure in said mould including a working member which is introduced to an operative position into said mould when the material is being moulded, said working member including means establishing said main and additional cavities by blocking communication between the main and additional cavities when the working member is in the operative position in said mould; rotor means extending into said mould in engagement with the material in the main cavity and isolated from the material in the additional cavities by virtue of the blocking means on said working member; and a torquemeter connected with said rotor means to measure the resistance to rotation applied thereto by the material in the main cavity, thereby providing identically cured specimens for subsequent tests that have not been subjected to shearing.
Claim 2
Dependent Claim
187 words
A material tester for plastic materials, said tester comprising: a plunger mould provided with a main cavity filled with a material to be subjected to physical testing, and additional cavities filled with the same material and in which, simultaneously with the physical testing of the material, additional samples are moulded under non-shear conditions for subsequent testing: means for developing pressure in said mould including a working member which is introduced to an operative position into said mould when the material is being moulded, said working member including means establishing said main and additional cavities by blocking communication between the main and additional cavities when the working member is in the operative position in said mould; rotor means extending into said mould in engagement with the material in the main cavity and isolated from the material in the additional cavities by virtue of the blocking means on said working member; and a torquemeter connected with said rotor means to measure the resistance to rotation applied thereto by the material in the main cavity, thereby providing identically cured specimens for subsequent tests that have not been subjected to shearing.
Claim 3
Dependent Claim
53 words
A tester as claimed in claim 1 in which said working member comprises a hollow spindle, said rotor means comprising a body having an upper part which is elongated and tapered to serve as a guide for entry of the rotor means into said spindle during moulding of the material to be tested.
Claim 4
Dependent Claim
47 words
A tester as claimed in claim 2 wherein said main cavity of said mould is cylindrical and said rotor means comprises a section of cylindrical shape fitted in said mean cavity of said mould to define an annular space therewith, said material being moulded in said space.
References Cited (Backward Citations)
US2037529A
Cited
US3182494A
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US3501948A
Cited
US3488992A
Cited
US3494172A
Cited
US3513693A
Cited
US3538758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |