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US 6,631,701 B2Granted
Camshaft lubrication system
OwnerMark E. Seader, Thomas E. Ehresmaninventors
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Abstract
A hollow camshaft (19) lubrication system for aircraft engines that supplies lubricant (14) to cam lobe surfaces (25) from the interior surface (22) of the hollow camshaft (19) even during periods when aircraft operation moves the rotation axis of the hollow camshaft (19) from horizontal.
Claims10
A method of lubricating a camshaft, comprising the steps of:
- a. supplying lubricant to a plurality of bearing means each having a corresponding lubrication supply conduit;
- b. rotating a hollow camshaft having a single internal lubrication passage rotationally journaled to said bearing means to align at least one camshaft lubrication supply duct with each said lubrication supply conduit, wherein said at least one camshaft lubrication supply duct traverses between a journal surface of said hollow camshaft and said single internal lubrication passage of said hollow camshaft;
- and
- c. supplying lubricant to said single internal lubrication passage of said hollow camshaft through each of said at least one lubrication supply duct;
- and
- d. rotationally displacing said camshaft lubrication supply duct and a cam surface lubrication supply duct between about zero degrees and thirty degrees about the rotation axis of said hollow camshaft, wherein said cam surface lubrication supply duct traverses between a cam surface of a first cam lobe adjacent to said journal surface of said hollow camshaft.
3 more elements
Dependencies are inferred from the claim text.