Microstructure arrangement for gripping low coefficient of friction materials
First Claim
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1. A microstructure arrangement for gripping low coefficient material comprising:
- a substrate disposed on a gripping surface wherein the substrate has a coefficient of friction relative to a polymer against steel of 0.2 or less;
a first set of pillars disposed on the substrate having a cross section area in the range of 100 μ
m2 to 160,000 μ
m2, height relative to the substrate in the range of 10 μ
m to 400 μ
m, and a pitch determined from the center of the pillars, in the range of 20 μ
m to 1000 μ
m;
a secondary set of pillars disposed on the first set of pillars having a cross section area less than that of the pillars in the first set of pillars;
wherein the first set of pillars and the second set of pillars are configured to cooperate to have the physical property of a grip force in excess of 50.0N with a contact area of 25% or less, as determined by the friction testing method; and
, wherein the substrate is PTFE,wherein the first set of pillars and the second set of pillars are configured to cooperate to have a coefficient of friction in the range of 0.7 to 0.9.
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Abstract
A microstructure arrangement for gripping low coefficient material comprising: a substrate disposed on a gripping surface; a set of pillars disposed on the substrate; and, wherein the set of pillars have the physical property of a grip force in excess of 50.0N with a contact area of 25% or less as determined by the friction testing method. A first set of pillars can be disposed on the substrate having a cross section area in the range of 100 μm2 to 160,000 μm2, height relative to the substrate in the range of 10 μm to 400 μm, and a pitch determined from the center of the pillars, in the range of 20 μm to 1000 μm; and a secondary set of pillars disposed on the first set of pillars having a cross section area less than that of the pillars in the first set of pillars.
26 Citations
12 Claims
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1. A microstructure arrangement for gripping low coefficient material comprising:
-
a substrate disposed on a gripping surface wherein the substrate has a coefficient of friction relative to a polymer against steel of 0.2 or less; a first set of pillars disposed on the substrate having a cross section area in the range of 100 μ
m2 to 160,000 μ
m2, height relative to the substrate in the range of 10 μ
m to 400 μ
m, and a pitch determined from the center of the pillars, in the range of 20 μ
m to 1000 μ
m;a secondary set of pillars disposed on the first set of pillars having a cross section area less than that of the pillars in the first set of pillars; wherein the first set of pillars and the second set of pillars are configured to cooperate to have the physical property of a grip force in excess of 50.0N with a contact area of 25% or less, as determined by the friction testing method; and
, wherein the substrate is PTFE,wherein the first set of pillars and the second set of pillars are configured to cooperate to have a coefficient of friction in the range of 0.7 to 0.9. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A microstructure arrangement for gripping low coefficient material comprising:
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a substrate disposed on a gripping surface wherein the substrate has a coefficient of friction relative to a polymer against steel of 0.2 or less; a first set of pillars disposed on the substrate having a cross section area in the range of 100 μ
m2 to 160,000 μ
m2, height relative to the substrate in the range of 10 μ
m to 400 μ
m, and a pitch determined from the center of the pillars, in the range of 20 μ
m to 1000 μ
m;a secondary set of pillars disposed on the first set of pillars having a cross section area less than that of the pillars in the first set of pillars; wherein the first set of pillars and the second set of pillars are configured to cooperate to have the physical property of a grip force in excess of 50.0N with a contact area of 25% or less, as determined by the friction testing method; and
, wherein the substrate is SBR,wherein the first set of pillars and the second set of pillars are configured to cooperate to have a coefficient of friction in the range of 1.0 to 1.4. - View Dependent Claims (8)
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9. A microstructure arrangement for gripping low coefficient material comprising:
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a substrate disposed on a gripping surface wherein the substrate has a coefficient of friction relative to a polymer against steel of 0.2 or less; a first set of pillars disposed on the substrate having a cross section area in the range of 100 μ
m2 to 160,000 μ
m2, height relative to the substrate in the range of 10 μ
m to 400 μ
m, and a pitch determined from the center of the pillars, in the range of 20 μ
m to 1000 μ
m;a secondary set of pillars disposed on the first set of pillars having a cross section area less than that of the pillars in the first set of pillars; wherein the first set of pillars and the second set of pillars are configured to cooperate to have the physical property of a grip force in excess of 50.0N with a contact area of 25% or less, as determined by the friction testing method; and
, wherein the substrate is nylon,wherein the first set of pillars and the second set of pillars are configured to cooperate to have a coefficient of friction in the range of 0.8 to 1.0.
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10. A microstructure arrangement for gripping low coefficient material comprising:
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a substrate disposed on a gripping surface wherein the substrate has a coefficient of friction relative to a polymer against steel of 0.2 or less; a set of pillars disposed on the substrate having a cross section area in the range of 10 μ
m2 to 400 μ
m2, height relative to the substrate in the range of 10 μ
m to 400 μ
m, a pitch determined from the center of the pillars in the range of 20 μ
m to 1000 μ
m, and a coefficient of friction in the range of 0.7 to 0.9 wherein the substrate is PTFE; and
,wherein the set of pillars are configured to cooperate to have the physical property of a grip force in excess of 50.0N with a contact area of 25% or less as determined by the friction testing method. - View Dependent Claims (11, 12)
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Specification
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Current AssigneeHoowaki, LLC
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Original AssigneeHoowaki, LLC
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InventorsHulseman, Ralph A., McPherson, Cameron L., Ravikumar, Nakul
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Primary Examiner(s)Simone, Catherine A.
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Application NumberUS15/674,291Publication NumberTime in Patent Office733 DaysField of Search428156US Class CurrentCPC Class CodesB22F 2005/005 Article surface comprising ...B22F 5/00 Manufacture of workpieces o...B22F 7/08 with one or more parts not ...B25J 15/0028 with movable, e.g. pivoting...
