US4352244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Straightly extensible measuring tape
Assignee: Individual
•
Filing: 1980-05-19
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Granted: 1982-10-05
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Expires: 2000-05-19
Abstract
Abstract This invention relates to a straightly extensible measuring tape which can maintain a straight extension when it is extended. It comprises a curvature portion having a larger arc than a semicircle at section of a width direction of the measuring tape under a forceless state when it has been extended, and a flattened portion integrally formed with the curvature portion. Consequently, the measuring tape of this invention is able to be wound or extended at one's option by using a preferred winding means.
Inventors
- 👤 Yasushi Tomuro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:43
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/10; G01B3/1003; G01B2003/1058
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
115 words
A straightly extensible measuring tape, comprising an elongated element to effect measuring, said element being adapted to be extended from a flattened wound position to an extended position so that the element maintains a straight extension, said element upon being extended from its wound position forming along the extended position a cross-sectional shape having a flattened portion and a curved portion contiguous with said flattened portion, throughout the entire extended length, said curved portion being continuously formed during the extending of the tape without a need to apply a curve-forming force thereto and being flattened when the element is retracted to said wound position and said curved portion forming an arc of at least 180°.
Claim 2
Dependent Claim
115 words
A straightly extensible measuring tape, comprising an elongated element to effect measuring, said element being adapted to be extended from a flattened wound position to an extended position so that the element maintains a straight extension, said element upon being extended from its wound position forming along the extended position a cross-sectional shape having a flattened portion and a curved portion contiguous with said flattened portion, throughout the entire extended length, said curved portion being continuously formed during the extending of the tape without a need to apply a curve-forming force thereto and being flattened when the element is retracted to said wound position and said curved portion forming an arc of at least 180°.
Claim 3
Dependent Claim
23 words
A straightly extensible measuring tape according to claim 1, wherein said flattened portion is provided with a locking means on its end portion.
Claim 4
Dependent Claim
46 words
A straightly extensible measuring tape according to claim 1, wherein said curved portion and said flattened portion extend in a longitudinal direction along opposed side ends defined by opposed side ends of said element, said curved portion and said flattened portion being formed integrally each other.
Claim 5
Dependent Claim
20 words
A straightly extensible measuring tape according to claim 1, wherein said flattened portion is calibrated to effect taking measurements therewith.
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) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |