Title: Culvert joint

Abstract: The present invention relates to a flexible joint to be inserted between culvert sections. In a culvert joint which consists of anchor members attached to the opposing culvert sections, a flexible member extending between said anchor members and a large number of strengthening members arranged in parallel at the internal and external positions of said flexible member, said strengthening members being classified into one with projections and one with holes to regulate the distance between them; the projections of said member with projections fit into the holes of said member with holes to overlap each other, thereby regulating the distance between them to follow an expansion and contraction or an uneven subsidence of the culvert and therefore, bearing earth pressure sufficiently.

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Inventors: Tanikawa, Takayoshi (Zentsuji, JP)

Application Number: 013921
Filing Date: 1979-02-22
Publication_date: 1980-09-09
Assignee: Seibu Polymer Kasei Kabushiki Kaisha (Zentsuji, JP)
Primary Class(es): 405/126 52/396.07, 285/114, 285/226, 404/68, 405/136
Other Classes:
US Patent Ref:

3112579	Dec, 1963	Needham et al.	405/135.
3344720	Oct, 1967	Hallock	404/47.
3390501	Jul, 1968	Driggens	404/47.
3704034	Nov, 1972	Shire et al.	285/114.
3725565	Apr, 1973	Schmidt	285/226.
3729939	May, 1973	Shimizu	405/136.
3750359	Aug, 1973	Balzer et al.	52/396.
3974614	Aug, 1976	Strong	404/68.
4027902	Jun, 1977	Tanikawa	285/226.

Other Refs: 2228599

Aug, 1973	DE

Primary Examiner: Taylor, Dennis L.
Assistant Examiner:
Attorney: Brisebois & Kruger