John D Christiansen

US Patent:

6590731, Jul 8, 2003

Filed:

Nov 22, 1999

Appl. No.:

09/444949

Inventors:

Weimin Pan - North Layton UT
Allen T. Bracken - Layton UT
John A. Christiansen - Riverdale UT
Kelly D. Wright - Layton UT

Assignee:

Iomega Corporation - Roy UT

International Classification:

G11B 2112

US Classification:

360 75

Abstract:

A head loading apparatus and method for a disk drive device adapts the head load characteristics of a disk drive in order to minimize the velocity of the heads during loading of the heads onto the surface of a data storage medium. The apparatus is characterized by attempting to load the heads onto engagement with a medium, determining whether the heads actually load, measuring the head load velocity, and adjusting the load characteristics of the drive based on the measured head load velocity. Preferably, the pulse width of the loading current applied to the actuator of the drive is adaptive, either increasingly or decreasingly, in response to the measured head load velocity. This adaptive soft head load characteristic of the drive allows the head load velocity to be minimizes to a velocity sufficient to move the read-write heads off of a load ramp and onto the surface of a data storage medium without damaging the head, the medium, or both.

US Patent:

20220346719, Nov 3, 2022

Filed:

Apr 28, 2022

Appl. No.:

17/661219

Inventors:

- Provo UT, US
John W. Christiansen - American Fork UT, US

Assignee:

Medic, Inc. - Provo UT

International Classification:

A61B 5/00
E03D 9/00
E03D 11/13
G01N 33/493
A61B 10/00

Abstract:

An analytical toilet is disclosed having at least one health and wellness sensor and a base supporting a bowl. A removable access panel is removably attached to the base. A space is provided between the base and the toilet, which is adapted to contain the at least one health and wellness sensor.

US Patent:

20220349767, Nov 3, 2022

Filed:

Apr 28, 2022

Appl. No.:

17/661186

Inventors:

- Provo UT, US
John W. Christiansen - American Fork UT, US
K. Jeffrey Campbell - Spanish Fork UT, US

Assignee:

Medic, Inc. - Provo UT

International Classification:

G01L 19/14
E03D 11/13
G01L 19/00
B81B 7/02

Abstract:

An analytical toilet is disclosed, having a bowl for receiving excreta supported by a base. The toilet also includes a pressure sensor mounting fixture, which has: a chamber with an outlet. The chamber is in fluid communication with the contents of the bowl through the outlet. The pressure sensor mounting fixture also has a pressure sensor cavity above the chamber having an inlet in fluid communication with the chamber such that an air bubble is maintained in the pressure sensor cavity. A pressure sensor is included that is adapted to measure the pressure in the pressure sensor cavity. Also, a system is disclosed for measuring changes in the volume in a toilet bowl. The system includes a pressure sensor mounting fixture, having a chamber with an outlet. The chamber is in fluid communication with the contents of the bowl through the outlet. The pressure sensor mounting fixture also has a pressure sensor cavity above the chamber having an inlet in fluid communication with the chamber such that an air bubble is maintained in the pressure sensor cavity. A pressure sensor is included that is adapted to measure the pressure in the pressure sensor cavity.