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US 2003/0150859 A1Published application
Sealing cap
OwnerHeinrich Reutterinventor
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OwnerHeinrich Reutterinventor
Estimating the term…
The invention relates to a pressure cap (11) for openings in tanks, particularly in motor-vehicle radiators, which has an internal cap component (14) that is provided with at least one flow connection between the inside and the outside of the tank, and with a valve arrangement (15) for releasing and blocking the flow connection. The said valve arrangement (15) has a first and a second valve body (17, 18) that can be moved back and forth. The first valve body (17) is biased in the direction of the inside of the tank against a first sealing seat (24) on the second valve body (18), which is pressed against a second sealing seat (32) on the interior cap component (14). Furthermore, the first and second valve bodies (17, 18) can be lifted when a respective threshold value of the inside tank pressure is exceeded and the flow connection (50, 51) between the inside and the outside of the tank is released. To simplify the manufacture and installation of the pressure cap and also to improve the hysteresis behaviour, inside the second valve body (18) a third valve body (19) is placed, between which and the second valve body (18) a first flow connection (50), designed in that section as a throttle gap (47), is provided between the inside of the tank and the first valve body (17).
Pressure cap (11, 111) for openings in tanks, particularly in motor-vehicle radiators, with an internal cap component (14, 114) that is provided with at least one flow connection between the inside and the outside of the tank, and with a valve arrangement (15, 115) for releasing and blocking the flow connection, whereby the said valve arrangement (15, 115) has a first and a second valve body (17, 118;
Pressure cap according to at least one of the previous claims, characterized in that the annular throttle gap (47, 147) of the first flow connection (50, 150) is so narrow that when pressure is applied through a liquid medium, a dynamic pressure occurs and overcomes the force of the second pressure spring (46, 146).
Pressure cap according to one of the previous claims, characterized in that between the first valve body (17, 117) and the second valve body (18, 118), a cylindrical chamber (34, 134) is provided which is in communication with the throttle gap (47, 147) between the second and third valve bodies (18, 19;
Pressure cap according to one at least one of the previous claims, characterized in that the first sealing seat (24, 124) on the second valve body (18, 118) lies radially outside the second sealing seat (32, 132) on the interior cap component (14, 114).
Pressure cap according to at least one of the previous claims, characterized in that the second sealing seat (32, 132) on the interior cap component (14, 114) lies radially outside the third sealing seat (43, 143) on the third valve body (19, 119).
Pressure cap according to at least one of the previous claims, characterized in that the sealing surfaces (21, 31, 39;
Pressure cap according to at least one of the previous claims, characterized in that the first valve body (17, 117) is provided with a central opening (56, 156) through which a vacuum valve body (57, 157) extends whose sealing seat (61, 161) surrounds the central opening and is contiguous to the sealing surface (21, 121) of the first valve body (17, 117).
Pressure cap according to at least one of the previous claims, characterized in that an exterior cap component (113) from which the interior component (114) is suspended, is formed by the handling lids or closure elements (112, 110) which are connected via an axially movable coupling insert (180) which makes the said elements releasable and anti-rotational and whose axial movement is derived from the pressure-controlled axial movement of the first valve body (117).
Pressure cap according to at least one of the previous claims, characterized in that the first valve body (117) is divided in two in radial connection and is provided with a radially interior valve body part (165) and a radially exterior valve body part (166) which are axially movable in relation to each other and are in communication with each other via an annular membrane seal (121).
Dependencies are inferred from the claim text.