Patent ID: 8721180

Claim:
A linear motion guide apparatus comprising: a guide rail, a slider slidably attached onto said guide rail for moving along said guide rail, a ball bearing device disposed between said slider and said guide rail for facilitating a sliding movement between said slider and said guide rail, an end cap comprising: a first side attached to and engaged with said slider, a second side faced away from said slider, a channel formed therein and defined between two legs for slidably receiving and engaging said guide rail, an inlet for receiving a lubricating fluid, each of said legs comprising a chamber located in said first side of said end cap, a groove formed in said first side of said end cap and defined by a rib and communicating with said chambers of said end cap, a casing located in said first side of said end cap, said casing comprising a compartment, said compartment of said casing communicating with said inlet of said end cap for receiving the lubricating fluid from said inlet of said end cap, and said compartment of said casing communicating with said groove for supplying the lubricating fluid from said compartment to said chambers of said end cap for lubricating said ball bearing device, said rib of said end cap being in contact with said slider, said compartment of said casing being defined by an outer wall which is in contact with said slider, and said outer wall of said casing being connected to said rib and aligned with said inlet of said end cap for resisting a flowing of the lubricating fluid, said end cap including a pathway formed in said first side of said end cap and communicating with said compartment of said casing, and a mouth piece engaged into said inlet of said end cap for supplying the lubricating fluid into said inlet of said end cap.