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US3707286A Expired / Lapsed US ⏱️ 0.0 years remaining

Bar structure for the horizontal bars of a gymnastic apparatus

Assignee: Individual
•
Filing: 1970-07-06
•
Granted: 1972-12-26
•
Expires: 1990-07-06
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Abstract

Abstract A gymnastic apparatus having horizontal laminated bars substantially of wood, wherein each bar comprises upper and a lower lamena glued together at an interface therebetween, and wherein longitudinal, cord-like inserts of elastic, synthetic material of inorganic origin are disposed in grooves of the lamenas. The bar is symmetrical along an imaginary vertical center line. The lamenas have at least three inserts. The direction of the fiber of the upper of the lamenas extends substantially vertically. Two of the inserts are disposed in the upper lamena and engage the interface provided between the upper and lower lamenas, and the third of the inserts is disposed in the lower lamena and extends to the lower outer face of the lower lamena.

Inventors

  • 👤 Albert Spieth
  • 👤 Rudolf Spieth

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 06:34
CPC Classifications
A; A63; A63B; A63B3/00

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 19 words
The gymnastic apparatus, as set forth in claim 1, wherein said elastic, synthetic material of inorganic origin comprises fibers.
Claim 2
Dependent Claim 19 words
The gymnastic apparatus, as set forth in claim 1, wherein said elastic, synthetic material of inorganic origin comprises threads.
Claim 3
Dependent Claim 19 words
The gymnastic apparatus, as set forth in claim 1, wherein said elastic, synthetic material of inorganic origin comprises wires.
Claim 4
Dependent Claim 29 words
The gymnastic apparatus, as set forth in claim 1, wherein said interface between said upper and lower lamenas extends within the range of the greatest width of said bar.
Claim 5
Dependent Claim 43 words
The gymnastic apparatus, as set forth in claim 1, wherein the height of said upper lamena is smaller than the height of the lower of said lamenas, and the height of the upper inserts is smaller than the height of the lower insert.
Claim 6
Dependent Claim 24 words
The gymnastic apparatus, as set forth in claim 1, wherein said two of said inserts disposed in said upper lamena are trapezoid in cross-section.
Claim 7
Dependent Claim 36 words
The gymnastic apparatus, as set forth in claim 7, wherein said upper inserts have a right angle trapezoid cross-section, the right angles are arranged adjacent each other, and the profile of said lower insert is oblique-angular.

References Cited (Backward Citations)

US1042808A Cited
US1377891A Cited
US2262861A Cited
DE1163208B Cited
AT245462B Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-12-26 1976-06-26 1976-12-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-12-26 1980-06-26 1980-12-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-12-26 1984-06-26 1984-12-26 $7700.00 Window Closed / Lapsed

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