US 12,269,302 B2
Tyre inflating device and method for controlling a tyre inflating process
Giulio Corghi, Correggio (IT)
Assigned to NEXION S.P.A., Correggio (IT)
Filed by NEXION S.P.A., Correggio (IT)
Filed on Mar. 4, 2022, as Appl. No. 17/653,586.
Claims priority of application No. 102021000005957 (IT), filed on Mar. 12, 2021.
Prior Publication US 2022/0288978 A1, Sep. 15, 2022
Int. Cl. B60C 23/00 (2006.01); G05D 16/10 (2006.01)
CPC B60C 23/00372 (2020.05) [B60C 23/00354 (2020.05); G05D 16/101 (2019.01)] 20 Claims
OG exemplary drawing
 
1. An inflating device for inflating a tyre, comprising:
an air feed line, configured to allow air to flow from an air feed source to the tyre in an inflating direction;
an inflating module, interposed between the air feed source and the tyre and including:
a primary valve, located on the air feed line and movable between a closed position, where it prevents air from flowing into the tyre, and an open position, where it allows the air to flow;
a first cylinder operatively connected to the primary valve and configured to cause the primary valve to open;
a first branch having a first end positioned at a point of the air feed line located upstream of the primary valve in the inflating direction, and a second end connected to the first cylinder so that the first branch extends between the air feed line and the first cylinder;
a second cylinder which is operatively connected to the primary valve and which is fed by a second branch extending from the air feed line at a point upstream of the primary valve, the second cylinder being configured to cause the primary valve to close;
a shutoff valve, located on the first branch and movable between a closed position, where it occludes the first branch to prevent fluid communication between the feed line and the first cylinder, and an open position, where it allows fluid communication, wherein the shutoff valve is configured to divide the first branch into a first stretch extending between the air feed line and the shutoff valve, and a second stretch extending between the shutoff valve and the first cylinder;
a control leg, configured to allow feeding air to the shutoff valve from a point on the feed line downstream of the primary valve in the inflating direction, the feeding of air causing the shutoff valve to switch from the open position to the closed position in response to a predetermined pressure value being exceeded;
a relief duct configured to gradually release air from the first cylinder to an outside environment when the shutoff valve is closed, wherein the relief duct extends for a length from the second stretch of the first branch at a branching point distanced from the first cylinder, and includes a regulator within said length, wherein the regulator varies in a controlled manner a free flow cross section inside the relief duct;
wherein the inflating module includes a constricting arrangement which reduces a working air flow cross section of the relief duct.