David E Glass

US Patent:

7823466, Nov 2, 2010

Filed:

Sep 5, 2008

Appl. No.:

12/231822

Inventors:

David E. Glass - Knoxville TN, US

International Classification:

G01L 1/26

US Classification:

73862392, 73826, 73856

Abstract:

A device for setting, adjusting, and measuring a force in a system, including a first portion for measuring a system force at a first end of the device and including a measurement means, a second portion for adjusting or setting the system force at a second end of the device and including an adjustment means, a housing where the first portion corresponds to the first end of the housing and the second portion corresponds to the second end of the housing, a resilient means within the measurement means for generating a resistance force, and a visual means for indicating an amount of the system force that is related to the physical position of the adjustment means and the resistance force created by the resilient means.

US Patent:

20190060737, Feb 28, 2019

Filed:

Aug 30, 2017

Appl. No.:

15/691709

Inventors:

David Ewing Glass - Knoxville TN, US

International Classification:

A63C 17/14
B60T 1/14

Abstract:

According to one aspect, an apparatus for reducing the speed or acceleration of motion of a skateboard and its user is disclosed. According to one embodiment, the apparatus includes one or more friction elements that are removably affixed to a substantially flat resilient member at a location near the first end of the resilient member typically proximate to the rear wheel mounting truck; the resilient member is then affixed by fasteners upon its opposite and second end to the underneath face of the platform of the skateboard, typically proximate to or forward of the center of the platform. The apparatus also includes a substantially rigid linkage that penetrates the skateboard platform and is affixed to near the first end of the resilient member for the purpose of interfacing the first end of the resilient member selectively to one foot of a user of the skateboard, such that when the user desires to reduce the speed or acceleration of the skateboard the user applies to the linkage a force substantially normal to the skateboard platform and therefore the resilient member. The force applied to the resilient member causes the friction element or elements to contact the riding surface, creating by the contact of the friction element or elements with the riding surface a frictional force that is transmitted to the skateboard platform via the fixation of the second end of the resilient member to the skateboard, opposingly counteracting the velocity or acceleration of the skateboard and user, thereby slowing the motion. The frictional force is modulated by the variable force applied to the apparatus by the user.