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AssigneeRobertshaw Controls Company
InventorFrancis S. Genbauff
Estimating the term…
A plural range pressure regulator construction having a housing provided with an inlet and an outlet separated by a valve seat that is controlled by a valve member that is interconnected to a flexible wall carried by the housing. Biasing means are carried by the housing for acting on one side of the wall to tend to move the wall in one direction relative to the housing, the biasing means comprising a plurality of separate spring means each acting on the wall to provide one pressure range for the pressure regulator construction. The housing has a storage space for storing one of the spring means so that the same will not act on the wall whereby the remaining spring means acting on the wall will provide another pressure range for the pressure regulator construction.
A method for making a plural range biasing construction comprising the steps of providing a housing means having a movable part, disposing biasing means in said housing means for acting on one side of said part to tend to move said part in one direction relative to said housing means, said biasing means comprising a plurality of separate spring means, causing each spring means to act on said part to provide one biasing range for said construction, storing one of said spring means completely in a storage space of said housing means so that the same will not act on said part whereby the remaining spring means acting on said part will provide another biasing range for said construction, forming said one spring means and said remaining spring means from coiled compression springs, causing said springs to be concentrically disposed and each having one end thereof operatively engaging said part when acting on said part to provide said one biasing range for said construction, and forming said storage space for said one spring means to be located in aligned relation with said remaining spring means and adjacent the other end thereof so as to be completely spaced from said part a distance at least equal to the length of said remaining spring means whereby said one spring means is out of operative engagement with said part and completely spaced therefrom a distance at least equal to the length of said remaining spring means when said other biasing range is being provided.
A method for making a plural range biasing construction comprising the steps of providing a housing means having a movable part, disposing biasing means in said housing means for acting on one side of said part to tend to move said part in one direction relative to said housing means, said biasing means comprising a plurality of separate spring means, causing each spring means to act on said part to provide one biasing range for said construction, storing one of said spring means in a storage space of said housing means so that the same will not act on said part whereby the remaining spring means acting on said part will provide another biasing range for said construction, forming said one spring means and said remaining spring means from coiled compression springs, causing said springs to be concentrically disposed when acting on said part to provide said one biasing range for said construction, forming said storage space for said one spring means to be located in aligned relation with said remaining spring means and adjacent one end thereof, closing one end of said storage space that is remote from said one end of said remaining spring means with a removable cover means of said housing means, and causing said one spring means to be stored in compressed relation between said cover means and said one end of said remaining spring means when being stored in said storage space.
Dependencies are inferred from the claim text.