Pipes and tubular conduits – Plural duct – Longitudinally extending common wall
Patent
1995-10-23
1998-06-16
Scherbel, David
Pipes and tubular conduits
Plural duct
Longitudinally extending common wall
138116, 138129, F16L 918
Patent
active
057655987
ABSTRACT:
An improved pipe construction is disclosed having an inner and outer surface, intermediate walls extending between the inner and outer surfaces, and a plurality of primary and secondary internal cells. There are twice as many secondary internal cells as there are primary internal cells. Each of the primary internal cells is of a circular cross-section, while each of the secondary internal cells is of a three-sided cross-section. The primary and secondary cells are wound about the central longitudinal axis of the pipe. A method of forming the pipe of this structure is also disclosed.
REFERENCES:
patent: 1093766 (1914-04-01), Campfield
patent: 3464450 (1969-09-01), Steffenini
patent: 3495628 (1970-02-01), Boender
patent: 3750058 (1973-07-01), Bankert, Sr. et al.
patent: 4215727 (1980-08-01), ter Wijlen
patent: 4461323 (1984-07-01), Morikawa
patent: 4529009 (1985-07-01), Horner et al.
patent: 5497809 (1996-03-01), Wolf
Gabriel Lester H.
Goddard James B.
Advanced Drainage Systems, Inc.
Hook James F.
Scherbel David
LandOfFree
Pipe construction does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pipe construction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pipe construction will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1715553