| 摘要 |
<p>Device for preventing the penetration of foreign matter and for allowing the application and retention of lubricant in self-orientating twin castors comprising a pair of wheels (14, 15) which are rotatably mounted on a spindle (6) driven through a seat (5) of a support (2) which is composed of a vertical wall (3) lying between the wheels and in which a vertical cylindrical recess (4a) is formed; the recess is open upwards for the rotational engagement of a stem (4b) for mounting the castor on a piece of furniture; two tubular portions (7, 8) are rigidly coupled to the opposite sides of the wall and are coaxial to the spindle (6); tubular bosses (16) rigidly coupled to the respective wheels (14, 15) protrude into the tubular portions (7, 8); a vertical blind recess (21) is furthermore formed in the wall and opens into the seat (5) above the spindle (6); a through bore (22) is also provided in the wall and is aligned with the blind recess (21) below the spindle; a spring (20) is accommodated in the recess (21) and acts on the spindle (6); the device is characterized in that it comprises elements (23-28) for closing the bore (22) and for preventing the leakage of lubricant through the tubular portions. <IMAGE></p> |
