US Pat. No. 9,897,126

SEALING PLUG FOR CLOSING HOLES IN WALLS AND THE LIKE

HEGAIN 2100 CONSULTING S....

1. A sealing plug for closing a hole in a wall, the hole in the wall having an inner face, and the wall having an outer contact
surface surrounding the hole in the wall; the sealing plug being of the type comprising:
an elastic body and
a stem coaxially assembled with one another, the stem having a free end emerging out of the elastic body;
said elastic body comprising
a main body which is configured for being expanded radially when pulling on the free end of the stem emerging out of the elastic
body, thus exerting a radial closing pressure (p) on the inner face of the hole to be plugged, and

a head attached to the main body, said head being configured for being compressed and for hermetic sealing and exerting an
axial closing pressure (P) on the outer contact surface of the wall surrounding the hole to be plugged when pulling on the
free end of the stem, the head comprising a compressive strength less than that of the main body such that at least part of
said head changes its geometry to adapt to the shape of the outer contact surface of the wall surrounding the hole to be plugged,

the sealing plug also comprising
a first thrust washer arranged close to the opposite end of the area of attachment between said head and the main body and
a second thrust washer arranged on the outer face of the head such that it enables the compression of the plug between said
first and second thrust washers.

US Pat. No. 10,214,923

SEALING PLUG FOR CLOSING HOLES IN WALLS AND THE LIKE

20 EMMA 20 S.L., Aduna (...

1. A plug for closing a hole in a wall that holds a fluid, the wall having an inner surface that defines the hole, the plug comprising:an elastic body having a central axis, a first end, a second end, an inner surface and an outer surface, the inner surface defining at least in part an internal cavity; and
a stem having a first part that resides inside the internal cavity and a second part that resides external to the elastic body protruding from the first end of the elastic body, the first part being operatively coupled to the elastic body so that a pulling on the second part causes the elastic body to axially compress and radially expand to exert a first pressure on the inner surface of the wall that defines the hole when the plug is located inside the hole;
the first end of the elastic body having a through opening that fluidly communicates the internal cavity with the fluid held by the wall so that when the plug is located inside the hole and the elastic body is radially expanded the fluid applies pressure against the inner surface of the elastic body to cause the pressure applied to the inner surface of the wall that defines the hole to be greater than the first pressure.