US3628376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
O-ring test instrument
Assignee: Motors Liquidation Co
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Filing: 1970-04-13
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Granted: 1971-12-21
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Expires: 1990-04-13
Abstract
Abstract A test instrument for determining processing and manufacturing uniformity in molded elastomeric articles such as O-rings wherein the O-ring is flexed between two power driven rollers while being loaded at a predetermined deflection by a third roller connected to a load-sensing element. The output of the sensing element is directed to an instrumentation device which records the stress level about the circumference of the O-ring the output variations being indications of internal discontinuities and manufacturing defects in the tested article.
Inventors
- 👤 Robert L Dega
- 👤 Donald J Mandley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:59
CPC Classifications
G; G01; G01M; G01M13/00; G01M13/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
170 words
A test instrument for determining processing and manufacturing uniformity in molded annular elastomeric seals, comprising: a support member; a pair of rollers rotatably supported on the support member, said rollers being relatively spaced so as to engage the inner diameter of the seal to be tested and establish deflection points for the length of said seal therebetween; a load roller carried by said support member for controlled movement relative to the deflection points; means for shifting said load roller with respect to the rollers so as to apply a predetermined deflection to said length of seal and create a measurable low-level stress therewithin; driving means operatively connected to the rollers for dynamically rotating the seal past the load roller; sensing means operatively connected with the load roller for detecting variances in said deflection of the load roller and for creating an output signal in accordance therewith; and indicator means coupled to the sensing means for receiving said output signal and visually indicating the relative stress uniformity of the tested article.
Claim 2
Dependent Claim
170 words
A test instrument for determining processing and manufacturing uniformity in molded annular elastomeric seals, comprising: a support member; a pair of rollers rotatably supported on the support member, said rollers being relatively spaced so as to engage the inner diameter of the seal to be tested and establish deflection points for the length of said seal therebetween; a load roller carried by said support member for controlled movement relative to the deflection points; means for shifting said load roller with respect to the rollers so as to apply a predetermined deflection to said length of seal and create a measurable low-level stress therewithin; driving means operatively connected to the rollers for dynamically rotating the seal past the load roller; sensing means operatively connected with the load roller for detecting variances in said deflection of the load roller and for creating an output signal in accordance therewith; and indicator means coupled to the sensing means for receiving said output signal and visually indicating the relative stress uniformity of the tested article.
Claim 3
Dependent Claim
173 words
A test instrument for determining the product acceptability of O-ring type seals having circular cross sections, comprising: a support stand; a pair of drive rollers rotatably mounted on said support stand; annular grooves on the drive rollers for receiving and drivingly engaging the inner surface of the O-ring to be tesTed; electric motor means for rotating the drive rollers to impart circumferential movement to the O-ring; a load roller reciprocably supported on said support stand; means for shifting the load roller toward said drive rollers into engagement with the outer surface of the O-ring to thereby load and deflect to a predetermined extent the length of the O-ring between said drive rollers; a load cell operatively connected to the load roller which produces an electrical output signal in accordance with said load and deflection; and recorder means coupled to the load cell for receiving said output signal and producing an output curve in accordance therewith, the variations in the curve being indicative of circumferential internal discontinuities and manufacturing irregularities in the tested article.
Claim 4
Dependent Claim
173 words
A test instrument for determining the product acceptability of O-ring type seals having circular cross sections, comprising: a support stand; a pair of drive rollers rotatably mounted on said support stand; annular grooves on the drive rollers for receiving and drivingly engaging the inner surface of the O-ring to be tesTed; electric motor means for rotating the drive rollers to impart circumferential movement to the O-ring; a load roller reciprocably supported on said support stand; means for shifting the load roller toward said drive rollers into engagement with the outer surface of the O-ring to thereby load and deflect to a predetermined extent the length of the O-ring between said drive rollers; a load cell operatively connected to the load roller which produces an electrical output signal in accordance with said load and deflection; and recorder means coupled to the load cell for receiving said output signal and producing an output curve in accordance therewith, the variations in the curve being indicative of circumferential internal discontinuities and manufacturing irregularities in the tested article.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |