Microstructured High Friction Surface For High Friction to Fabric, Yarn, And Fibers
AssigneeHoowaki, LLC
InventorsRalph Hulseman, Sarah Hulseman
Life of this patent
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Abstract
This invention is directed to an improved contact surface for manipulating articles wherein the microstructure included on the contact surface having a plurality of pillars spaced apart in the range of 200 μm and 600 μm, having a height in the range of 50 μm and 1200 μm, a width of in the range of 70 μm and 300 μm, a wall draft angle between 0° and 15°, a density of in the range of 5,000 to 20,000 pillars per square inch, and a friction rating greater than 7. The contact surface can be included on a sewing machine feed dog, a glove, sporting equipment, firearm grip, hand rail, tool grip, tool handle, and a strap such as for a satchel or backpack.
Claims21
A contact surface on an article for manipulating an article comprising:
- a microstructure included on the contact surface having a plurality of pillars spaced apart between 200 μm and 600 μm, having a height between 50 μm and 1200 μm, a width of between 70 μm and 300 μm, a wall draft angle between 0° and 15°, a density of between 5,000 to 20,000 pillars per square inch, and a friction rating greater than 7 in relation to the contact surface and an article surface;
- and,
- a static co-efficient of friction in the range of 0.78 to 3.56 and a dynamic coefficient of friction in the range of 0.74 to 4.08 as determined by friction test ASTM 1894.
A contact surface on an article for manipulating an article comprising a microstructure included on the contact surface having a plurality of pillars having a height in the range of 50 μm and 1200 μm, a width of in the range of 70 μm and 300 μm, a wall draft angle in the range of 0° and 15°, and a static co-efficient of friction in the range of 0.83 to 1.70 and a dynamic coefficient of friction in the range of 0.80 to 1.39 as determined by friction test ASTM 1894 in relation to cotton fabric.
A contact surface on an article for manipulating an article comprising:
- a microstructure disposed on a contact surface wherein the contact surface is a surface on an article taken from the group consisting of:
- sewing feed dog, glove, grip, handle, strap, hand rail, tool, and sporting goods;
- and,
- a plurality of pillars included in the microstructure wherein the pillars have an area in the range of 63 cm2 and 242 cm2 and a pitch in the range of 200 μm and 600 μm.
Dependencies are inferred from the claim text.