US 4,379,470 AGranted

Closing cap, particularly for a motor vehicle radiator

AssigneeReutter Metallwarenfabrik GmbH

InventorHeinrich Reutter

Life of this patent

Estimating the term…

Loading patent…

Abstract

In the housing of a closing cap 2, a valve seat plate 3 is held in place by means of a resilient ring 8 forming at the same time a seal relative to the tank connection to which the closing cap is screwed by its internal thread 1. The valve seat plate 3 supports a sub-pressure valve 4 and an excess-pressure valve 5. Aside from its seal ring 13, the closing member 4 of the sub-pressure valve is made in one piece. The excess-pressure valve 5 comprises a loose valve disc 28 cooperating with a valve seat 27 of the valve seat plate 3. The closing spring 30 is non-rotatably secured to the valve disc 28 and bears by its other open end against a stop 37 so that, by turning the valve disc, the spring pressure is increased or reduced. For this purpose, the valve disc is actuated by a tool introduced through the outlet aperture 21. In another embodiment, a setting member 40 is provided which is rotatable in the outlet aperture and can be displaced in the axial direction of the valve by means of two mating helicoidal surfaces 38, 39.

Claims11

Dependent claims

A removable motor vehicle radiator closing cap for a vehicle cooling system, comprising, a cap housing having an open end, a resilient valve seat plate extending across said housing and dividing it vertically into a closed top space and a bottom space adjacent the opened end, an excess pressure valve mounted in said plate including a cup-shaped extension portion having an excess pressure opening extending through said seat plate, an excess pressure valve seat defined around the excess pressure opening, an excess pressure valve disc engageable on said valve seat to close the excess pressure opening, a top cover member overlying said excess pressure valve disc and having a top bearing face with a top opening, an excess pressure spring biased between said disc and said bearing face and urging said valve disc toward said excess pressure valve seat, a sub-pressure valve mounted in said plate including a sub-pressure opening through said plate, a sub-pressure valve seat defined around said sub-pressure opening, a sub-pressure valve including a disc portion engageable with the sub-pressure valve seat and having a tappet portion extending through the sub-pressure opening, and a sub-pressure spring biased between said valve seat plate and said tappet urging said disc portion onto said sub-pressure valve seat.

Dependencies are inferred from the claim text.