Patent ID: 7784152
Filing Date: 2010-08-31
Classification: F16C,Y10T

Abstract:
1. A pivot assembly for securing a pair of mounting lugs and stabilizing a machine member comprising: an axis member having a first end member and a second end member, an opening formed in both the first and second end member; a pair of expansion sleeves, wherein one of the pair of expansion sleeves is positioned over each of the first end and second end of the axis member, each expansion sleeve has a plurality of slots formed there through, wherein at least one of the plurality of slots runs a length of the expansion sleeve; a pair of locking devices, wherein one locking device is inserted into the opening formed in each end of the axis member, the locking devices engaging the pair of expansion sleeves causing the expansion sleeves to expand to secure the axis member in the mounting lugs; a chamber member formed around a central area of the axis member; at least one lubricant chamber member formed between the central area of the axis member and the chamber member; a pair of sealed friction spacers wherein the pair of friction spacers is positioned between the chamber member and the mounting lug member to ensure against axial movement in the pivot assembly; spacer grooves formed on a front and back surface of each spacer; chamber grooves formed around an interior perimeter of the chamber member, wherein one chamber groove is aligned with a corresponding spacer groove; a pair of rotating friction spacer seals wherein one rotating friction spacer seal is positioned on the front surface of the spacer and a second rotating friction spacer is positioned on the back surface of the spacer, each rotating friction spacer seal positioned in corresponding aligned spacer and chamber grooves; a pair of friction seal members wherein one friction seal member is attached on each end of the axis member and to the chamber member to form an annular sealing around the axis member and the chamber member to prevent a lubricant in the lubricant chamber member from leaking; a pair of axle seal grooves, wherein one axle seal groove is formed in each end of the axis member; and a pair of seal grooves formed around an interior perimeter of the chamber member, wherein one seal groove is formed in each end of the chamber member; wherein each of the pair of axle seal grooves is aligned with a corresponding seal groove formed in the chamber member and holds a corresponding friction seal member to form a secure seal to prevent the lubricant in the lubricant chamber member from leaking.