Francis J Atkinson

US Patent:

43727050, Feb 8, 1983

Filed:

Nov 18, 1980

Appl. No.:

6/207879

Inventors:

Francis S. Atkinson - Metairie LA

International Classification:

E02B 312

US Classification:

405 19

Abstract:

An articulated erosion control system provides a flexing articulated mat comprising a plurality of blocks which interlock in a three dimensional fashion allowing a mat formed of the blocks to conform to changes in terrain. In the preferred embodiment there is provided at least one "lock block" (FIG. 1) having a plurality of open ended sockets spaced about the periphery thereof and at least one "key block" (FIG. 2) being connectable during operation to the lock block; the key block providing a plurality of locking arms spaced about and integrally formed with a central portion of the key block. Connection of the lock block and the key block can be achieved by relative vertical movement of the key block towards the lock block when the key block locking arm is superimposed over the open ended socket of the lock block--the connection being completed when a portion of the locking arm occupies at least in part the space within the socket. The socket is narrowed at its intersection with the peripheral wall portion of the lock block. The tip portion of the key block locking arm is enlarged thus disallowing relative motion between the key block and the lock block in a generally horizontal direction once the locking integral arm and socket are connected.

US Patent:

50113283, Apr 30, 1991

Filed:

Jan 23, 1989

Appl. No.:

7/299493

Inventors:

Francis S. Atkinson - New Orleans LA
William G. McDougal - Philomath OR

International Classification:

E02B 306

US Classification:

405 30

Abstract:

A permeable breakwater for submerged offshore or seawall retentive installation includes a base and permeable opposed sides terminating at an upwardly projecting permeable wave wall. The breakwater is located offshore to cause moderate to heavy waves to break further offshore thereby dissipating their energy before reaching the beach.