David J Willardson

US Patent:

20070248408, Oct 25, 2007

Filed:

Apr 25, 2006

Appl. No.:

11/410257

Inventors:

David Willardson - Gresham OR, US

International Classification:

E01F 13/12

US Classification:

404006000

Abstract:

This device is a type of lance that is attached to the underneath of a police vehicle. It consists of a hydraulic pump that extends and retracts a long sharp lance from the front of the police car that will deflate the tires of vehicles that the police car is pursuing in a chase.

US Patent:

20180332927, Nov 22, 2018

Filed:

May 19, 2017

Appl. No.:

15/599669

Inventors:

David John Willardson - American Fork UT, US

International Classification:

A43B 21/32
A43B 21/06
A43B 21/02
A43B 21/04

Abstract:

A shoe with a spring heel is provided. The shoe includes a shoe top portion, a sole and a spring. The shoe top portion is operable to retain a user foot within. The sole is secured to the bottom of the shoe top portion. The sole includes a front toe portion and a rear heel portion. The rear heel portion includes an upper inner surface and lower inner surface formed by a cutout portion. The spring is disposed within the cutout portion. The spring includes an upper plate and a lower plate joined by a U-shaped bend. The upper plate is secured to the upper inner surface and the lower plate is secured to the lower inner surface of the rear heel portion.