Patent ID: 8387474

Claim:
A motion guide apparatus comprising: an elongated shaft including a groove formed on an outer peripheral surface thereof, a movable member movably attached onto said elongated shaft, and including a screw hole formed therein for receiving said elongated shaft, a housing attached to said movable member and moved in concert with said movable member, and including a cylindrical barrel having a bore formed therein for receiving said elongated shaft, and including a space formed between said housing and said barrel for receiving a lubricating oil, and including a passage formed in said barrel and communicative with said bore of said barrel and said space of said housing for allowing the lubricating oil to flow from said space into said bore of said barrel and then into said groove of said elongated shaft, a plunger slidably received and engaged in said space of said housing for separating said space of said housing into a compressing chamber and a compartment and for forcing the lubricating oil that is received in said compressing chamber of said housing to flow through said passage of said housing, and an oil applying member rotatably engaged in said passage of said housing and rotatable relative to said housing to carry and to apply the lubricating oil through said passage of said housing, and said oil applying member including an engaging rim directed toward said groove of said elongated shaft for carrying and applying the lubricating oil into said groove of said elongated shaft, and including a wheel rim having an outer diameter arranged for engaging with said outer peripheral surface of said elongated shaft and for allowing said oil applying member to be forced to rotate relative to said housing by said elongated shaft.