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US 12,163,208 B2Granted
Hydraulic devices including coated surfaces
AssigneeMaxterial, Inc.
InventorsAtieh Haghdoost, Mehdi Kargar, Ersan Ilgar, Daniel Church
Life of this patent
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Abstract
Hydraulic devices that include a moveable component configured to contact a functional fluid during movement of the hydraulic device are described. The hydraulic device can include a coating on a surface. The coating can include a metal or metal alloy such as, for example, a molybdenum or tungsten in combination with one or more other materials.
Claims30
A hydraulic device comprising:
- a piston member operative to be driven by pressurized fluid between a first position to a second position, the piston member comprising a coated surface, wherein the coated surface comprises a surface coating, and wherein the surface coating comprises an alloy layer comprising (i) molybdenum and (ii) phosphorous, boron, nitrogen or carbon and (iii) at least one element selected from the group consisting of nickel, tungsten, and tin, wherein the at least one element selected from the group consisting of nickel, tungsten, and tin is present in the alloy layer at 65% by weight or more based on the weight of the alloy layer, wherein the coated surface comprises a surface roughness Ra of less than or equal to 1 micron, and wherein the alloy layer comprises uniform and non-uniform grain sizes with an average grain size less than 2 microns;
- and
- a housing configured to retain the pressurized fluid and to receive the piston member and permit movement of the piston member from the first position to the second position along an axis of the housing.
A hydraulic device comprising:
- a piston member operative to be driven by pressurized fluid between a first position to a second position, the piston member comprising a coated surface, wherein the coated surface comprises a surface coating, and wherein the surface coating comprises an alloy layer, wherein the alloy layer is an outer electrodeposited alloy layer and comprises nickel, molybdenum and one of phosphorous, boron, nitrogen, or carbon, and wherein the nickel is present in the outer electrodeposited alloy layer at 65% by weight or more based on the weight of the outer electrodeposited alloy layer, wherein the coated surface comprises a surface roughness Ra of less than or equal to 1 micron, and wherein the alloy layer comprises uniform and non-uniform grain sizes with an average grain size less than 2 microns;
- and
- a housing configured to retain the pressurized fluid and to receive the piston member and permit movement of the piston member from the first position to the second position along an axis of the housing.
A hydraulic device comprising:
- a piston member operative to be driven by pressurized fluid between a first position to a second position, the piston member comprising a coated surface, wherein the coated surface comprises a surface coating, and wherein the surface coating comprises an alloy layer, wherein the alloy layer is an outer electrodeposited alloy layer and comprises nickel, molybdenum and at least one of phosphorous, boron, nitrogen, or carbon, and wherein the molybdenum is present in the outer electrodeposited alloy layer at 15% or less by weight based on a weight of the outer electrodeposited alloy layer and the nickel is present in the outer electrodeposited alloy layer at 65% by weight or more based on the weight of the outer electrodeposited alloy layer, wherein the coated surface comprises a surface roughness Ra of less than or equal to 1 micron, and wherein the alloy layer comprises uniform and non-uniform grain sizes with an average grain size less than 2 microns;
- and
- a housing configured to retain the pressurized fluid and to receive the piston member and permit movement of the piston member from the first position to the second position along an axis of the housing.
A hydraulic device comprising:
- a piston member operative to be driven by pressurized fluid between a first position to a second position, the piston member comprising a coated surface, wherein the coated surface comprises a surface coating, and wherein the surface coating comprises an alloy layer, wherein the alloy layer is an outer electrodeposited alloy layer and comprises nickel, molybdenum and at least one of phosphorous, boron, nitrogen, or carbon, and wherein the nickel is present in the outer electrodeposited alloy layer at 90% by weight or more based on the weight of the outer electrodeposited alloy layer, wherein the coated surface comprises a surface roughness Ra of less than or equal to 1 micron, and wherein the alloy layer comprises uniform and non-uniform grain sizes with an average grain size less than 2 microns;
- and
- a housing configured to retain the pressurized fluid and to receive the piston member and permit movement of the piston member from the first position to the second position along an axis of the housing.
Dependencies are inferred from the claim text.