Patent ID: 6902322

Claim:
A linear guide bearing apparatus comprising: a guide rail including a first raceway groove and extending in an axial direction of the linear guide bearing apparatus; a movable element including a second raceway groove opposed to the first raceway groove and a rolling element return groove connected continuously with the second raceway groove through curved grooves respectively formed in the two end portions of the second raceway groove, the movable element being movably fitted with the guide rail; a plurality of rolling elements loaded in a circulation passage including the first raceway groove, the second raceway groove, the curved grooves, and the rolling element return groove for moving the movable element along the guide rail; and, an under-seal disposed in the movable element for sealing a space between the guide rail and the movable element, wherein the under-seal is inserted between the movable element and a protrusion of an end cap provided on the movable element, and wherein the under-seal includes a sliding contact portion elastically contacted with the guide rail to thereby receive an upward-going force from the guide rail.