US 11,745,716 B2
Spring brake pushrod to park diaphragm interface
Will E. Roberts, Elyria, OH (US)
Assigned to Bendix Commercial Vehicle Systems LLC, Elyria, OH (US)
Filed by Bendix Commercial Vehicle Systems LLC, Elyria, OH (US)
Filed on Dec. 22, 2020, as Appl. No. 17/130,383.
Prior Publication US 2022/0194347 A1, Jun. 23, 2022
Int. Cl. B60T 17/08 (2006.01)
CPC B60T 17/083 (2013.01) [B60T 17/085 (2013.01); B60T 17/088 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An interface between an adapter push rod and a parking brake diaphragm seal comprising:
an axial projection of the push rod at one end of the push rod,
a thread extending axially between a free end of the projection and an abutment of the push rod formed at a junction of the projection and a remainder of the push rod,
a washer having an approximately conical wall extending radially inwardly from an outer circumference of the washer towards a central mounting connection of the washer, the central mounting connection having a radial flange and abutting the abutment when installed on the push rod,
a nut having a thread matching the thread extending axially between the free end of the projection and the abutment, and
a hardened element having an opening aligned axially with the axial projection, the opening in the hardened element receiving the projection,
wherein a circumferential groove defined in at least one side of the radial flange forms a seal location between the approximately conical wall and a remainder of the washer, and a portion of the diaphragm seal is pressed by the nut and the hardened element into the circumferential groove to produce a sealing bead.