US 12,135,069 B2
Bellows suspension unit
Tam Van Nguyen, Philadelphia, PA (US); Matthew Robert May, Hatboro, PA (US); Sean Cattie, Perkasie, PA (US); Bryan McMasters, Telford, PA (US); and David Cimbolo, Lake Harmony, PA (US)
Assigned to RB Distribution, Inc., Colmar, PA (US)
Filed by RB Distribution, Inc., Colmar, PA (US)
Filed on May 26, 2022, as Appl. No. 17/825,443.
Prior Publication US 2023/0383813 A1, Nov. 30, 2023
Int. Cl. F16F 13/00 (2006.01); F16F 9/04 (2006.01)
CPC F16F 13/002 (2013.01) [F16F 9/0409 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An adjustable suspension device comprising:
a first plate that has an upper surface and a lower surface with a downwardly dependent circular wall that defines an axial recess;
a second plate that is spaced a predetermined distance from the first plate, the second plate has a lower surface and an upper surface with a projection that extends toward and is aligned with the recess of the first plate;
a compression spring has a first end received within the axial recess of the first plate and a second end received over the projection of the second plate;
an inflatable bellows that extends between the first plate and the second plate and encases the compression spring in an interior chamber;
an aperture in the first plate extends through the first plate and into the downwardly dependent circular wall; and,
a port connected to the first plate permits ingress and/or egress of a fluid through the first plate and the downwardly dependent circular wall into the inflatable bellows.