Hoowaki LLC

Pendleton, United States

Hoowaki LLC

Pendleton, United States
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Grant
Agency: National Science Foundation | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 150.00K | Year: 2009

This Small Business Innovation research Phase I project is to develop flexible, elastic, superhydrophobic surfaces with a technology that physically transforms surfaces by molding microstructures into base polymers, ceramics or metals on a large scale. Uniquely the surfaces may be highly elastic and flexible; and, the process can manufacture surfaces having multiple structures of different sizes and shapes. Development and implementation of the proposed manufacturing process will provide a method of manufacturing multi-scale and multi-functional surfaces from every day, low cost materials suitable for consumer products. The work could impact transportation safety (tires, airplanes), low-cost green energy (solar panels, wind turbine blades), improved health (medical devices), increased safety (tool grips, first responder tools) and enjoyment (sports products).


Patent
Hoowaki LLC | Date: 2010-06-11

Described herein are casting and molding methods useful for making microstructured objects. By including a plurality of microfeatures on the surface of an object, other characteristics may be imparted to the object, such as increased hydrophobicity. Some of the casting and molding methods described herein further allow for manufacture of objects having both microfeatures and macro features, for example microfeatures on or within macro features or selected macro feature regions.


This invention is directed to an improved contact surface for manipulating fabrics wherein the microstructure included on the contact surface having a plurality of pillars spaced apart in the range of 200 m and 600 m, having a height in the range of 50 m and 1200 m, a width of in the range of 70 m and 300 m, 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, tools, and a strap such as for a satchel or backpack.


A method of manufacturing a production part having microstructured features comprising the steps of fabricating a microstructured prototype having microstructured features, manufacturing a microstructured intermediate from the microstructured prototype so that the microstructured intermediate carries a negative of the microstructured features, attaching the microstructured intermediate to a manufacturing tool thereby providing microstructured features on a manufacturing tool, providing feedstock containing material from the group comprising of: metal, ceramic, binder, and any combination of these and manufacturing the production part from the feedstock, using the manufacturing tool and using a process from the group consisting of: compression molding, roll forming, stamping, embossing, extrusion injection molding, and any combination of these.


Patent
Hoowaki Llc | Date: 2011-06-10

A microstructure disposed on a surface carried by an object comprising: a first set of microfeatures carried by the object wherein said first set of microfeatures causes the surface of the object to exhibit physical properties differing from physical properties exhibited by a non-microstructured surface; and, a second set of microfeatures carried by said surface wherein said second set of microfeatures causes the surface of the object to exhibit physical properties differing from physical properties exhibited by the non-microstructured surface and by said first set of microfeatures.


Patent
Hoowaki LLC | Date: 2010-08-26

The method for manufacturing products having a metal surface by imparting microfeatures onto the metal surface. The method if further described as the steps of: creating a transfer tool from a microstructured intermediate fabricated from a microstructured prototype having microfeatures; and, transferring the microfeatures to said metal surface using the transfer tool.


Patent
Hoowaki Llc | Date: 2015-07-28

This invention is directed to a microstructured filament that can be used to make fibers having an extruded filament having pre-cooled microfeatures in a radial spiral arrangement about a bore though the filament wherein the microfeature has a width in the range of 25 m to 40 m and height in the range of 90 m to 100 m; and, the filament having a post-cooled state having post-cooled microfeatures having physical dimensions smaller than that of the pre-cooled microfeatures. The filament can include microfeatures having a width in the range of 400 nm to 4 m and height in the range of 400 nm to 4 m. The filament and fiber can include physical characteristics selected from the group consisting of: hydrophobicity, self-cleaning, increased hydro-dynamic drag coefficients, decreased or increased aerodynamic drag coefficients, increased friction, reduced friction, optical effects, increased adhesion, decreased adhesion, oleophobicity, tactile effects, anti-blocking and any combination of these.


Patent
Hoowaki Llc | Date: 2015-06-30

A manufacturing apparatus for manufacturing extruded parts having microstructures comprising: a support structure; a hopper carried by the support structure for receiving feedstock; an extrusion chamber operatively associated with the hopper for receiving the feedstock from the hopper and melting the feedstock above a feedstock melting temperature; a die carried by the support structure having die microstructures disposed on an inner surface of the die, the die microstructures having a plurality of microfeatures each having an upper surface and a lower surface, the melted feedstock being forced through the die to produce an extrudate having extrudate microstructures; and, a cooling assembly wherein the extrudate microstructures of the pre-cooled extrudate have larger physical dimensions than that of the extrudate microstructures of the cooled extrudate.


Patent
Hoowaki Llc | Date: 2015-06-30

A manufacturing apparatus for manufacturing extruded parts having microstructures comprising: a support structure; a hopper carried by the support structure for receiving feedstock; an extrusion chamber operatively associated with the hopper for receiving the feedstock from the hopper and melting the feedstock above a feedstock melting temperature; a die carried by the support structure having die microstructures disposed on an inner surface of the die, the die microstructures having a plurality of microfeatures each having an upper surface and a lower surface, the melted feedstock being forced through the die to produce an extrudate having extrudate microstructures; and, a cooling assembly wherein the extrudate microstructures of the pre-cooled extrudate have larger physical dimensions than that of the extrudate microstructures of the cooled extrudate.


Patent
Hoowaki LLC | Date: 2015-04-21

This invention is a fracturing component and method having a fluid and a plurality of three dimensional structures mixed in the fluid wherein each structure has a longitudinal axis, center of mass and center of pressure wherein the center of mass and the center of pressure do not align in a stable manner causing the structure to flutter in the fluid to reduce the structure from settling out of the fluid when injected into a fissure. Each three dimensional structure can include a first end of the structure having a first plane having an angle of incident ^(1 )offset from perpendicular to the longitudinal axis and a second end of the structure having a second plane having an angle of incident ^(2 )offset from perpendicular to the longitudinal axis. The difference between ^(1 )and ^(2 )can be in a range of 0 to 65.

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