Patent US4096712A successfully refreshed from Google Patents.
Patent US3769830A successfully refreshed from Google Patents.
US3769830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscurometer
Assignee: Uniroyal Goodrich Tire Co
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Filing: 1972-09-01
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Granted: 1973-11-06
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Expires: 1992-09-01
Abstract
Abstract A method and apparatus for determining the physical properties of vulcanizable elastomeric materials utilizing a cone-shaped oscillating rotor that is cooperative with a cone-shaped cavity in a stationary mold section whereby a sample of material is confined therebetween and subjected to a confining pressure, as well as an oscillating shearing force. The walls of the test chamber are heated to a predetermined temperature during cure, while torque sensing means are connected to the input of the rotor to measure the variation in force required to oscillate such projection. Means are provided to maintain a programmed confined pressure which is proportional to torque developed on the sample during the cure cycle compensating for any shrinkage of the sample. A recorder is connected to the torque sensing device to record the variations in shearing strain.
Inventors
- 👤 J Porter
- 👤 P Karper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:50
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/10; G01N11/16; G01N11/162; G01N11/165
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
166 words
An apparatus for determining the physical properties of vulcanizable elastomeric material comprising die means cooperable to define a test sample receiving chamber for receiving a test sample for testing such materials, means connected to one of said die means for oscillation thereof to provide a shearing force on said sample in said test chamber, means operatively connected to said oscillating means for measuring said shearing force and providing an output signal therefrom, means to move said die means into cooperative engagement with the sample to maintain a pressure on said sample of material held by said die means; means to heat said die means to a predetermined temperature, indicator means operative to receive said output signal for indicating its progressive value for use in analyzing said materials, and circuit means operatively connected to said means for moving said die means into cooperative engagement with said sample and operative to provide a controlled programmed pressure thereon that is responsive to the torque developed by said die means.
Claim 2
Independent Claim
166 words
An apparatus for determining the physical properties of vulcanizable elastomeric material comprising die means cooperable to define a test sample receiving chamber for receiving a test sample for testing such materials, means connected to one of said die means for oscillation thereof to provide a shearing force on said sample in said test chamber, means operatively connected to said oscillating means for measuring said shearing force and providing an output signal therefrom, means to move said die means into cooperative engagement with the sample to maintain a pressure on said sample of material held by said die means; means to heat said die means to a predetermined temperature, indicator means operative to receive said output signal for indicating its progressive value for use in analyzing said materials, and circuit means operatively connected to said means for moving said die means into cooperative engagement with said sample and operative to provide a controlled programmed pressure thereon that is responsive to the torque developed by said die means.
Claim 3
Dependent Claim
25 words
An apparatus as set forth in claim 1 wherein said circuit means is responsive to provide said programmed pressure after a minimum viscosity is reached.
Claim 4
Dependent Claim
67 words
An apparatus as set forth in claim 1 wherein said means for moving said die means into cooperative engagement with the sample is air cylinder means, and said circuit means for providing a controlled programmed pressure on said air cylinder means of said moving means includes circuit means that are energizable to provide an increasing pressure to said air cylinder that is proportional to the torque developed.
Claim 5
Dependent Claim
22 words
An apparatus as set forth in claim 3 wherein said circuit means includes means for increasing said pressure to a preset limit.
Claim 6
Independent Claim
238 words
An apparatus for determining the physical properties of vulCanizable elastomeric material comprising a pair of die means that are movable toward and away from each other; said die means are cooperable to define a test sample receiving chamber with an annular opening between said die means when moved toward each other and wherein said chamber receives a test sample; means connected to one of said die means for oscillation thereof to provide a shearing force on said sample in said test chamber; means operatively connected to said oscillating means for measuring said shearing force and providing an output signal therefrom; means to move the other of said die means relative to and toward said one die means for cooperative engagement with the sample to maintain a pressure on said sample held between said die means; a pressure dome providing a closure for said opening between said die means; means to supply pressurized fluid to said pressure dome under controlled pressure to maintain a preselected fluid pressure on a test sample confined in said test chamber; means to heat said die means to a predetermined temperature; indicator means operative to receive said output signal for indicating its progressive value for use in analyzing said materials; and means operatively connected to said die moving means to provide a pressure that is proportional to the torque developed in response to a signal received from said means for measuring said shearing forces.
Claim 7
Independent Claim
238 words
An apparatus for determining the physical properties of vulCanizable elastomeric material comprising a pair of die means that are movable toward and away from each other; said die means are cooperable to define a test sample receiving chamber with an annular opening between said die means when moved toward each other and wherein said chamber receives a test sample; means connected to one of said die means for oscillation thereof to provide a shearing force on said sample in said test chamber; means operatively connected to said oscillating means for measuring said shearing force and providing an output signal therefrom; means to move the other of said die means relative to and toward said one die means for cooperative engagement with the sample to maintain a pressure on said sample held between said die means; a pressure dome providing a closure for said opening between said die means; means to supply pressurized fluid to said pressure dome under controlled pressure to maintain a preselected fluid pressure on a test sample confined in said test chamber; means to heat said die means to a predetermined temperature; indicator means operative to receive said output signal for indicating its progressive value for use in analyzing said materials; and means operatively connected to said die moving means to provide a pressure that is proportional to the torque developed in response to a signal received from said means for measuring said shearing forces.
Claim 8
Dependent Claim
250 words
An apparatus as set forth in claim 5 wherein said apparatus has a housing; said die means are cooperative to define a hollow cone cavity with a restrictive opening along the upper end portion of said hollow cone cavity; said die means are cooperative with said housing to define said pressure dome that communicates with said hollow cone cavity through said restrictive opening; and said means for providing said pressure on said die means includes a pressure programmer means; said pressure programmer includes a counter means, a memory circuit means, program selection means, and a comparison circuit means; said counter means is responsive to said first mentioned output signal to provide a second output signal for storage in said memory circuit; a timing means connected to said counter means for clearing said counter means at preselected time intervals to permit said counter means to receive said output signal from said measuring means; said comparison circuit means interconnecting said memory circuit means and said counter means for comparison of said outputs and operable to provide an output signal that is the difference therebetween, said programmed selection means cooperative with said comparison circuit for limiting the output signal from said comparison circuit to signals above a preset limit; and integrator circuit means operative to receive said output signal above said preset limit to actuate an increase in pressure to said means for providing said pressure on said die means, which pressure increase is proportional to the torque developed by said die means.
Claim 9
Independent Claim
179 words
An apparatus for determining the physical properties of vulcanizable elastomeric materials comprising a pair of spaced die members cooperable to define a test chamber and hold a sample of material therebetween; oscillating means operatively connected to one of said die members for oscillating said one die member relative to the other die member to provide a shearing force on said sample received by said test chamber; measuring means operatively connected to said oscillating means for measuring said shearing force and providing an output signal therefrom; means to heat said die members to a preselected temperature; means operative to receive said output signal for indicating its progressive value; air cylinder means operatively interconnecting said die members to move said other die member toward said one member into cooperative engagement with a test sample held in said test chamber to provide a pressure thereon; control means connected to said air cylinder means to provide a primary pressure followed by a secondary pressure; and said secondary pressure is a programmed pressure that is proportional to the torque developed from said die members.
Claim 10
Independent Claim
179 words
An apparatus for determining the physical properties of vulcanizable elastomeric materials comprising a pair of spaced die members cooperable to define a test chamber and hold a sample of material therebetween; oscillating means operatively connected to one of said die members for oscillating said one die member relative to the other die member to provide a shearing force on said sample received by said test chamber; measuring means operatively connected to said oscillating means for measuring said shearing force and providing an output signal therefrom; means to heat said die members to a preselected temperature; means operative to receive said output signal for indicating its progressive value; air cylinder means operatively interconnecting said die members to move said other die member toward said one member into cooperative engagement with a test sample held in said test chamber to provide a pressure thereon; control means connected to said air cylinder means to provide a primary pressure followed by a secondary pressure; and said secondary pressure is a programmed pressure that is proportional to the torque developed from said die members.
Claim 11
Dependent Claim
52 words
An apparatus for determining the physical properties of vulcanizable elastomeric materials as set forth in claim 7 wherein said control means has a time delay means for holding said secondary pressure at a constant pressure for a predetermined time interval and thence increasing said secondary pressure in response to said torque developed.
Claim 12
Dependent Claim
28 words
An apparatus for determining the physical properties of vulcanizable materials as set forth in claim 8 wherein said secondary pressure is set to reach a predetermined maximum pressure.
Claim 13
Independent Claim
90 words
A method for determining physical properties of elastomeric materials comprising: subjecting a sample of material to a first confining pressure, heating such sample to a predetermined temperature thence subjecting said confined heating sample to oscillating shearing strains from an input source having predetermined constant rate and amplitude of oscillation, measuring resistance to said shearing strains to provide an output torque signal; subjecting said sample of material to a second pressure different than said first pressure which second pressure is a controlled programmed pressure that is proportional to said torque developed.
Claim 14
Independent Claim
90 words
A method for determining physical properties of elastomeric materials comprising: subjecting a sample of material to a first confining pressure, heating such sample to a predetermined temperature thence subjecting said confined heating sample to oscillating shearing strains from an input source having predetermined constant rate and amplitude of oscillation, measuring resistance to said shearing strains to provide an output torque signal; subjecting said sample of material to a second pressure different than said first pressure which second pressure is a controlled programmed pressure that is proportional to said torque developed.
Claim 15
Dependent Claim
42 words
A method for determining physical properties of elastomeric materials as set forth in claim 10 wherein said second pressure is held constant for a predetermined period of time prior to said initiation of said pressure that is responsive to said developed torque.
Claim 16
Independent Claim
87 words
A method for determining physical properties of elastomeric materials comprising: subjecting a confined sample of material to a first pressure for a predetermined period of time, heating such sample to a predetermined temperature, subjecting said confined heated sample to oscillating shearing strain from an input source, subjecting said sample of material to a secondary confining pressure that is proportional to said shearing strain developed after elapse of said predetermined time while being subjected to said oscillating shearing strain; and measuring the torsional resistance to these shearing strains.
Claim 17
Independent Claim
87 words
A method for determining physical properties of elastomeric materials comprising: subjecting a confined sample of material to a first pressure for a predetermined period of time, heating such sample to a predetermined temperature, subjecting said confined heated sample to oscillating shearing strain from an input source, subjecting said sample of material to a secondary confining pressure that is proportional to said shearing strain developed after elapse of said predetermined time while being subjected to said oscillating shearing strain; and measuring the torsional resistance to these shearing strains.
Claim 18
Dependent Claim
23 words
The method for determining the physical properties as set forth in claim 12 wherein said secondary pressure is for a predetermined time interval.
Claim 19
Dependent Claim
35 words
The method for determining the shearing torque as set forth in claim 13 wherein said subjecting of said sample of material to said secondary pressure is after the scorch point of the material is reached.
References Cited (Backward Citations)
US3538758A
Cited
US3531996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |