US 12,123,382 B2
Pressure damping device for a fluid circuit
Nicola Moretti, Gassino Torinese (IT); Clément Bret, Turin (IT); Olivier Tanneau, Saint Ouen (FR); and Kevin Adam, Langueux (FR)
Assigned to HUTCHINSON, Paris (FR)
Filed by HUTCHINSON, Paris (FR)
Filed on Mar. 17, 2023, as Appl. No. 18/185,887.
Claims priority of application No. 2202642 (FR), filed on Mar. 24, 2022.
Prior Publication US 2023/0323844 A1, Oct. 12, 2023
Int. Cl. F02M 55/04 (2006.01); F02M 37/00 (2006.01); F02M 69/46 (2006.01); F16K 7/17 (2006.01); F16K 17/04 (2006.01); F16L 55/053 (2006.01)
CPC F02M 37/0041 (2013.01) [F02M 55/04 (2013.01); F02M 69/462 (2013.01); F16K 7/17 (2013.01); F16K 17/0453 (2013.01); F16L 55/053 (2013.01); F02M 2200/315 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A pressure damping device for a fluid circuit, the device comprising:
a lower body comprising fluid inlet and outlet ports which are connected to a chamber located between the inlet and outlet ports, the body being formed in one single piece and the chamber comprising a first bottom,
an upper cover attached to the body above the chamber, the cover comprising an internal cavity with a second bottom oriented towards the first bottom of the chamber,
an elastically deformable membrane interposed between the body and the cover, the membrane being substantially circular in shape and comprising a central portion which has a constant thickness and a peripheral portion which is clamped between the body and the cover to ensure a seal between the chamber and the cavity,
a circular cup arranged in the cavity and on the central portion of the membrane, and
a spring interposed between the cup and the second bottom of the cavity,
wherein the body comprises a support member for supporting the membrane, the support member projecting from the first bottom and comprising a free upper end on which the membrane is adapted to be supported,
and in which:
the member extends from the first bottom along a central axis to a member height which is less than or equal to a height of the chamber, the member having a circular outline and having an external diameter D3 measured with respect to said axis,
the cup is centered on said axis and has an external diameter D10 measured with respect to said axis, with 0.8×D3<D10<1.2×D3, and
the membrane is centered on said axis and the peripheral portion has a clamping internal diameter D1 measured with respect to said axis, with D1>1.5×D3; and
wherein the member comprises a tubular wall centered on said axis and having at least two radial notches.