US 12,234,876 B2
Optimized mass cast bar pin for bushing assembly
Joseph F Cerri, III, Norwalk, OH (US); and Zoren E. Gaspar, Huron, OH (US)
Assigned to The Pullman Company, Milan, OH (US)
Filed by The Pullman Company, Milan, OH (US)
Filed on Dec. 21, 2021, as Appl. No. 17/557,582.
Prior Publication US 2023/0193972 A1, Jun. 22, 2023
Int. Cl. F16F 1/38 (2006.01)
CPC F16F 1/3863 (2013.01) [B60G 2204/41 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A bushing assembly comprising:
a metal inner sleeve;
an outer sleeve;
an elastomer disposed between the inner sleeve and the outer sleeve and including a bumper; and
a bar pin including a first end, a second end, and a central portion between the first end and the second end, the central portion extending along a longitudinal axis and having a cruciform cross-section perpendicular to the longitudinal axis, the bar pin further including a first intermediate portion between the central portion and the first end, the first intermediate portion having an uninterrupted circular cross-section perpendicular to the longitudinal axis, wherein the inner sleeve circumscribes the central portion of the bar pin, the bar pin further including a radially-extending flange, wherein the flange is proximate to and longitudinally spaced apart from the bumper, wherein the bar pin further includes a second intermediate portion between the central portion and the second end, the second intermediate portion having an uninterrupted circular cross section perpendicular to the longitudinal axis, wherein a first diameter of the central portion at a longitudinal midpoint of the bar pin is the same as a second diameter of the first intermediate portion, wherein the bar pin further includes a first flat portion between the first end and the first intermediate portion and a second flat portion between the second end and the central portion.