Pipes and tubular conduits – Plural duct – Coaxial
Patent
1996-05-31
1998-02-17
Brinson, Patrick
Pipes and tubular conduits
Plural duct
Coaxial
138111, 138103, 138177, F16L 918
Patent
active
057182663
ABSTRACT:
The tubular member for telescopic propeller shafts has a cross-sectional profile with four projections 1, 1 and 3, 3 and respective longitudinal channels 5, 5 and 7, 7; each of the projections has symmetrical outwardly converging walls; and the plane of symmetry X--X of two opposing projections 1, 1 forms an angle of 85.degree. and an angle of 95.degree. with the plane of symmetry Y--Y of the other two opposing projections 3, 3.
REFERENCES:
patent: 2476216 (1949-07-01), Polleau
patent: 4918765 (1990-04-01), Harding
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