Patent ID: 6224288
Filing Date: 2001-05-01
Classification: F16B,Y10T

Abstract:
An assembly, the assembly comprisingan upper plate having a flat bottom surface with an upper aperture,a lower plate having a flat top surface with a lower aperture aligned with the upper aperture, the upper aperture alternately unidirectionally moving relative to the lower aperture,a fastening bolt extending between the upper and lower plates within the upper and lower aperture, the fastening bolt for providing a loading force between the upper plate and the lower plate, anda washer bearing comprising:(a) a top slider plate having at least one top groove aligned with the unidirectional movement and in parallel to the upper and lower plates, the top groove extends between the upper plate and the lower plate for supporting the loading force, the top groove provides a guide for sliding back and forth in alternating unidirectional motion in parallel alignment with the alternating relative movement of the upper and lower apertures, the top slider plate has a top flat surface for buttressing the flat bottom surface of the upper plate;(b) a bottom slider plate having at least one bottom groove aligned with the unidirectional movement and in parallel to upper plate and lower plate, the bottom groove extends between and in parallel to the upper plate and the lower plate for supporting the loading force, the bottom groove mates to the top groove to provide a guide for sliding back and forth in alternating unidirectional motion in parallel alignment with the alternating relative movement of the upper and lower apertures, the bottom slider plate has a flat bottom surface for buttressing the flat top surface of the lower plate; and(c) a washer aperture in the top and bottom slider plates in alignment with the upper and lower apertures for receiving the fastening bolt, the washer aperture being larger than the fastening bolt for providing space around the fastening bolt for enabling the fastening bolt to move relative to at least one of the top and bottom slider plates as the top and bottom slider plate slide back and forth as the upper aperture alternately and unidirectionally moves back and forth relative to the lower aperture after applying the loading force by the fastening bolt.