Bradley Patents:

SPIRAL^® geotube PATENT nUMBER 5,902,070
Abstract

An improved geotextile container of the type for maintaining fill material includes a geotextile fabric configured into a tubular shape and having stitched, multi-layer, flanged seams with the stitched flange disposed inside the container. Due to this construction, outwardly directed forces imparted by the fill material will be directed against the stitching. An embodiment has a helical seam along the length thereof instead of one or more longitudinal strait seams. An alternative container embodiment with a helical seam along the length thereof, has an inner liner of geotextile material having one or more longitudinal strait seams. Another alternative container embodiment with an outer layer of geotextile material having an helical seam along the length thereof, has an inner liner of geotextile material having its own helical seam configured with a different pitch than the helical seam in the outer layer.

LINK/JOINT ^® PATENT NUMBER
ABSTRACT

 

PROTECTION BOARD pATENT NUMBER 5,780,144
Abstract

A composite sheet material for use as a planar drain and a protection board. The sheet material has a multi-layer construction formed into a composite by needling. The multi-layer construction preferably has a layer of a soft nonwoven fabric material sandwiched between outer layers of a stiffened fabric material. The composite material may be configured into relatively narrow longitudinal strips for use as a wicking drain. Such longitudinal strips may often have a width of approximately three (3) inches or less in exemplary constructions.