Robert J Jansen

US Patent:

59924659, Nov 30, 1999

Filed:

Jul 22, 1997

Appl. No.:

8/900029

Inventors:

Robert C. Jansen - Anaheim CA

International Classification:

F15D 5500

US Classification:

138 37

Abstract:

An insert for placement within a generally tubular fluid conduit having an inner conduit wall. The insert functions to provide quasi-laminar flow to a fluid, and is constructed as a generally ring shaped flow-through structure having an outer wall and an inner wall. The outer wall has a shape complimentary to the inner conduit wall such that the structure can be held by friction fit at an interface of the outer wall and conduit wall. The inner wall of the structure has projecting inwardly therefrom a plurality of uniformly spaced generally sinusoidal shaped vanes each terminating at an apex disposed between about 0. 4 and 0. 8 the radius dimension of the structure, and extending longitudinally preferably helically at an angle between about 17 degrees and 19 degrees in relation to a horizontal plane. Substantially identical construction as that of the insert is also incorporated within an inventive tubular fluid conduit having an inner wall with at least one integral quasi-laminar flow inducing portion constructed with substantially identical components as present at the inner wall of the insert. The construction functions to induce and maintain optimized spiral flow within a conduit.

US Patent:

20140196655, Jul 17, 2014

Filed:

Jan 15, 2013

Appl. No.:

13/742278

Inventors:

ROBERT CARL JANSEN - Anaheim CA, US

International Classification:

B63B 1/04

US Classification:

114290

Abstract:

A displace hull with a shape that is both laterally symmetric and fore-to-aft symmetric is disclosed. The hull includes a pair of channels that help to manage a flow of water around the hull. The hull also includes sponsons and propellers that are located amidships on the port and starboard sides.