Patent US3207474A successfully refreshed from Google Patents.
US3207474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tail block for carpet stretcher
Assignee: Individual
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Filing: 1964-09-24
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Granted: 1965-09-21
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Expires: 1984-09-24
Abstract
No abstract record available.
Inventors
- 👤 Harold J Silva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:08
CPC Classifications
A; A47; A47G; A47G27/00; A47G27/04; A47G27/0487; A47G27/0493
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
A TAIL BLOCK FOR A CARPET STRECHER COMPRISING: (A) A SOLID METAL BODY HAVING A FIRST FLAT RECTANGULAR VERTICAL SURFACE WITH TOP AND BOTTOM PARALLEL AND HORIZONTAL SIDES THAT EXTEND AT RIGHT ANGLES TO SAID SURFACE; (B) SAID SOLID METAL BODY HAVING A SECOND VERTICAL SURFACE PARALLEL THE FIRST SURFACE AND BEING SPACED THEREFROM; (C) SAID SOLID METAL BODY HAVING A HEMI-SPHERICAL RECESS THEREIN OPENING ONTO SAID SECOND SURFACE FOR ROCKABLY RECEIVING A BALL JOINT THEREIN OF THE CARPET STRETCHER; (D) SAID SOLID METAL BODY HAVING A CYLINDRICAL CAVITY THEREIN COMMUNICATING WITH SAID HEMI-SPHERICAL RECESS, THE AXIS OF SAID CAVITY EXTENDING AT RIGHT ANGLES TO SAID SECOND SURFACE; AND (E) SAID SOLID METAL BODY HAVING AN ELONGATED GROOVE OPENING INTO SAID CAVITY, SAID GROOVE PARALLELING SAID TOP AND BOTTOM SIDES AND BEING ADAPTED TO SLIDABLY RECEIVE A PROJECTION EXTENDING FROM SAID BALL JOINT, SAID PROJECTION PERMITTING THE SWINGING OF SAID TAIL BLOCK ABOUT SAID BALL JOINT IN A HORIZONTAL PLANE AS THE PROJECTION SLIDES IN THE GROOVE, AND SAID PROJECTION WHEN ITS AXIS IS PERPENDICULAR TO SAID FIRST AND SECOND SURFACE PERMITTING SAID TAIL BLOCK TO ROTATE THROUGH 360* ABOUT THE PROJECTION AXIS AS A PIVOT.
Claim 2
Dependent Claim
196 words
A TAIL BLOCK FOR A CARPET STRECHER COMPRISING: (A) A SOLID METAL BODY HAVING A FIRST FLAT RECTANGULAR VERTICAL SURFACE WITH TOP AND BOTTOM PARALLEL AND HORIZONTAL SIDES THAT EXTEND AT RIGHT ANGLES TO SAID SURFACE; (B) SAID SOLID METAL BODY HAVING A SECOND VERTICAL SURFACE PARALLEL THE FIRST SURFACE AND BEING SPACED THEREFROM; (C) SAID SOLID METAL BODY HAVING A HEMI-SPHERICAL RECESS THEREIN OPENING ONTO SAID SECOND SURFACE FOR ROCKABLY RECEIVING A BALL JOINT THEREIN OF THE CARPET STRETCHER; (D) SAID SOLID METAL BODY HAVING A CYLINDRICAL CAVITY THEREIN COMMUNICATING WITH SAID HEMI-SPHERICAL RECESS, THE AXIS OF SAID CAVITY EXTENDING AT RIGHT ANGLES TO SAID SECOND SURFACE; AND (E) SAID SOLID METAL BODY HAVING AN ELONGATED GROOVE OPENING INTO SAID CAVITY, SAID GROOVE PARALLELING SAID TOP AND BOTTOM SIDES AND BEING ADAPTED TO SLIDABLY RECEIVE A PROJECTION EXTENDING FROM SAID BALL JOINT, SAID PROJECTION PERMITTING THE SWINGING OF SAID TAIL BLOCK ABOUT SAID BALL JOINT IN A HORIZONTAL PLANE AS THE PROJECTION SLIDES IN THE GROOVE, AND SAID PROJECTION WHEN ITS AXIS IS PERPENDICULAR TO SAID FIRST AND SECOND SURFACE PERMITTING SAID TAIL BLOCK TO ROTATE THROUGH 360* ABOUT THE PROJECTION AXIS AS A PIVOT.
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |