US3143878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stiffness tester for lumber
Assignee: Potlatch Forests Inc
•
Filing: 1960-09-16
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Granted: 1964-08-11
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Expires: 1980-09-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert J Hoyle
- 👤 Herbert B Mckean
- 👤 Gerald F Scheelke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:02
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
A STIFFNESS TESTER FOR LUMBER, COMPRISING: A RIGID SUPPORTING FRAME; DEFLECTION MEANS MOUNTED ON SAID FRAME, SAID DEFLECTION MEANS INCLUDING SPACED SUPPORTS ADAPTED TO CONTACT A FIRST SURFACE OF A TEST LENGTH OF LUMBER AND INTERMEDIATE MEANS LOCATED BETWEEN SAID SUPPORTS AND OPPOSED THERETO, THE INTERMEDIATE MEANS BEING ADAPTED TO CONTACT THE SURFACE OF A TEST LENGTH OF LUMBER OPPOSITE TO SAID FIRST SURFACE; MOTION PRODUCING MEANS MOUNTED ON SAID FRAME OPERATIVELY CONNECTED TO SAID DEFLECTION MEANS ADAPTED TO EFFECT RELATIVE MOTION OF SAID SUPPORTS AND SAID INTERMEDIATE MEANS TOWARD ONE ANOTHER TO THEREBY CAUSE DEFLECTION OF A TEST LENGTH OF LUMBER CONTACTED THEREBY; FORCE SENSING MEANS MOUNTED ON SAID FRAME OPERATIVELY CONNECTED TO SAID DEFLECTION MEANS ADAPTED TO INDICATE THE REACTIVE FORCE EXERTED BY A TEST LENGTH OF LUMBER DUE TO ITS DEFLECTION; AND MOTION LIMITING MEANS MOUNTED ON SAID FRAME AND SAID DEFLECTION MEANS OPERATIVELY CONNECTED TO SAID MOTION PRODUCING MEANS AND TO SAID FORCE SENSING MEANS ADAPTED TO LIMIT THE RELATIVE MOTION OF SAID SUPPORTS AND SAID INTERMEDIATE MEANS TO A PRE-SELECTED VALUE BEYOND AN INITIAL AMOUNT OF MOTION REQUIRED TO EFFECT A PRE-SELECTED INDICATION OF REACTIVE FORCE BY SAID FORCE SENSING MEANS.
Claim 2
Dependent Claim
196 words
A STIFFNESS TESTER FOR LUMBER, COMPRISING: A RIGID SUPPORTING FRAME; DEFLECTION MEANS MOUNTED ON SAID FRAME, SAID DEFLECTION MEANS INCLUDING SPACED SUPPORTS ADAPTED TO CONTACT A FIRST SURFACE OF A TEST LENGTH OF LUMBER AND INTERMEDIATE MEANS LOCATED BETWEEN SAID SUPPORTS AND OPPOSED THERETO, THE INTERMEDIATE MEANS BEING ADAPTED TO CONTACT THE SURFACE OF A TEST LENGTH OF LUMBER OPPOSITE TO SAID FIRST SURFACE; MOTION PRODUCING MEANS MOUNTED ON SAID FRAME OPERATIVELY CONNECTED TO SAID DEFLECTION MEANS ADAPTED TO EFFECT RELATIVE MOTION OF SAID SUPPORTS AND SAID INTERMEDIATE MEANS TOWARD ONE ANOTHER TO THEREBY CAUSE DEFLECTION OF A TEST LENGTH OF LUMBER CONTACTED THEREBY; FORCE SENSING MEANS MOUNTED ON SAID FRAME OPERATIVELY CONNECTED TO SAID DEFLECTION MEANS ADAPTED TO INDICATE THE REACTIVE FORCE EXERTED BY A TEST LENGTH OF LUMBER DUE TO ITS DEFLECTION; AND MOTION LIMITING MEANS MOUNTED ON SAID FRAME AND SAID DEFLECTION MEANS OPERATIVELY CONNECTED TO SAID MOTION PRODUCING MEANS AND TO SAID FORCE SENSING MEANS ADAPTED TO LIMIT THE RELATIVE MOTION OF SAID SUPPORTS AND SAID INTERMEDIATE MEANS TO A PRE-SELECTED VALUE BEYOND AN INITIAL AMOUNT OF MOTION REQUIRED TO EFFECT A PRE-SELECTED INDICATION OF REACTIVE FORCE BY SAID FORCE SENSING MEANS.
References Cited (Backward Citations)
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US2312755A
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US2338338A
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US2693107A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |