US3301039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slid resistance drag tester
Assignee: The Pennsylvania State University
•
Filing: 1964-01-06
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Granted: 1967-01-31
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Expires: 1984-01-06
Abstract
No abstract record available.
Inventors
- 👤 Hartwig W Kummer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:26
CPC Classifications
G; G01; G01N; G01N19/00; G01N19/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
APPARATUS FOR MEASURING ROUGHNESS IN LOCAL AREAS OF A SURFACE, COMPRISING A HOUSING SUPPORTED AT ONE END ADJACENT SAID SURFACE BY A WHEELED CART, BEING JOURNALED AT POINTS SUBSTANTIALLY BELOW AN AXIS OF ROTATION FOR THE WHEELS THEREOF, A LONGITUDINAL SLIDE MEMBER MOUNTED IN SUBSTANTIALLY FRICTIONLESS SLIDING ENGAGEMENT RELATIVE TO SAID HOUSING, A SHOE SUPPORTING A SECOND END OF SAID HOUSING IN SLIDING FRICTIONAL ENGAGEMENT WITH SAID SURFACE BEING LINKED TO URGE SAID MEMBER LONGITUDINALLY RELATIVE TO THE HOUSING IN PROPORTION TO A FORCE SUFFICIENT TO SLIDE SAID SHOE ON THE SURFACE, MANUALLY OPERATED MEANS FOR APPLYING A FORCE PROXIMATELY TO SAID SURFACE FOR TRANSLATING SAID HOUSING ALONG THE SURFACE AT A SUBSTANTIALLY UNIFORM RATE, A CLOSED HYDRAULIC PRESSURE CHAMBER, HORIZONTAL SHAFT MEANS COUPLING SAID MEMBER TO INCREASE SAID PRESSURE IN PROPORTION TO SAID FORCE AS THE SHOE IS TRANSLATED, AND A GAGE REGISTERING CHANGES OF PRESSURE IN SAID CHAMBER.
Claim 2
Dependent Claim
150 words
APPARATUS FOR MEASURING ROUGHNESS IN LOCAL AREAS OF A SURFACE, COMPRISING A HOUSING SUPPORTED AT ONE END ADJACENT SAID SURFACE BY A WHEELED CART, BEING JOURNALED AT POINTS SUBSTANTIALLY BELOW AN AXIS OF ROTATION FOR THE WHEELS THEREOF, A LONGITUDINAL SLIDE MEMBER MOUNTED IN SUBSTANTIALLY FRICTIONLESS SLIDING ENGAGEMENT RELATIVE TO SAID HOUSING, A SHOE SUPPORTING A SECOND END OF SAID HOUSING IN SLIDING FRICTIONAL ENGAGEMENT WITH SAID SURFACE BEING LINKED TO URGE SAID MEMBER LONGITUDINALLY RELATIVE TO THE HOUSING IN PROPORTION TO A FORCE SUFFICIENT TO SLIDE SAID SHOE ON THE SURFACE, MANUALLY OPERATED MEANS FOR APPLYING A FORCE PROXIMATELY TO SAID SURFACE FOR TRANSLATING SAID HOUSING ALONG THE SURFACE AT A SUBSTANTIALLY UNIFORM RATE, A CLOSED HYDRAULIC PRESSURE CHAMBER, HORIZONTAL SHAFT MEANS COUPLING SAID MEMBER TO INCREASE SAID PRESSURE IN PROPORTION TO SAID FORCE AS THE SHOE IS TRANSLATED, AND A GAGE REGISTERING CHANGES OF PRESSURE IN SAID CHAMBER.
References Cited (Backward Citations)
US2496405A
Cited
US2700297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |