High efficiency hydraulic oils
OwnerKelli H. Wright, David G. L. Holt +3inventors
InventorsKelli H. Wright, David G. L. Holt, Angela Galiano-Roth, James T. Carey, Martin N. Webster
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Abstract
Methods for achieving favorable efficiency properties are disclosed including methods for blending a lubricant composition and lubricant compositions. In one embodiment, the method comprises the steps of obtaining at least one base stock and at obtaining at least one base stock chosen to have a favorable air release properties, obtaining at least one additive, blending at least one base stock and at least one additive to achieve a favorable effective bulk modulus through air release property, bulk modulus, and using a relationship between density and bulk modulus.
Claims25
A hydraulic lubricating oil, comprising
- a) at least one base stock;
- b) at least one additive;
- c) wherein the base stock has a density at 15.6° C. of greater than 0.9 and a ASTM D-3427 air release of less than 1.25 percent air at 1 minute.
A method of improving hydraulic efficiency in a system comprising
- a) determining a favorable hydraulic efficiency requirement of the system.
- b) obtaining a hydraulic oil to achieve a favorable hydraulic efficiency property using a relationship between the hydraulic oil's density, and bulk modulus to obtain a high bulk modulus hydraulic oil.
- c) lubricating the system with the lubricant.
A method of formulating a lubricating oil with favorable hydraulic efficiency comprising:
- a) obtaining at least one base stock chosen to have a favorable air release properties;
- b) obtaining at least one additive;
- c) blending at least one base stock and at least one additive to achieve a favorable bulk modulus and air release property using a relationship between density and bulk modulus.
Dependencies are inferred from the claim text.