Steven Roger Nielsen

US Patent:

46062009, Aug 19, 1986

Filed:

Jul 22, 1985

Appl. No.:

6/757243

Inventors:

Steven L. Nielsen - Bountiful UT

International Classification:

F25D 2302
A23G 900

US Classification:

62302

Abstract:

A modular custard freezing machine housed in a cabinet that consists of interior support members whereto panels are releasably connected and supports components of the machine including: a deep pan in the cabinet top for receiving a custard mix poured therein to pass that mix, on demand, through a valve that directs the mix flow into a freezing barrel of a custard freezing chamber; the custard freezing chamber includes the freezing barrel, a coolant gas chamber therearound with a layer of insulation formed around that freon or other coolant gas chamber and contained within a housing that is mounted to a platform; the platform further includes mounted thereto, aligned bearing mounts whereto aligned bearings are secured to receive a shaft journaled therethrough, the shaft further including a pulley thereon that is turned through a belt by an electric motor, and connected to a collar whereto a shaft of a paddle assembly is splined; which paddle assembly is arranged for turning in the freezing barrel, congealing mix therein, which mix is extruded therefrom through a valve arranged in the cabinet front panel. The platform mounted custard freezing chamber, paddle assembly turned therein and the arrangement for turning that paddle assembly constitute a module that can be easily installed in and removed from the custard freezing machine cabinet for repair or replacement.

US Patent:

44650639, Aug 14, 1984

Filed:

May 25, 1982

Appl. No.:

6/381965

Inventors:

Steven D. Nielsen - Sandy UT
Peter Willshaw - Buenos Aires, AR

Assignee:

University of Utah - Salt Lake City UT

International Classification:

A61B 502

US Classification:

128 1D

Abstract:

The volume of blood pumped by an artificial ventricle or ventricular assist device is extracorporeally monitored as a function of the volume of fluid used to drive the ventricle. The ventricle is divided into two chambers by a flexible diaphragm. Fluid is alternately supplied to one chamber during systole and then removed from that chamber during diastole. In the preferred embodiment, during systole the rate of fluid flow is sensed by establishing a differential pressure between two points in the fluid's flow path. The differential pressure is converted to a proportional voltage which may be integrated to provide the desired volume over a given time interval, which corresponds to the cardiac output within. +-. 5-10%.