Abstract: A supportive spring system particularly adaptable to vehicles such as railway cars that are operated with widely variable loads from empty to fully loaded condition. Such a spring system utilizing a plurality of helical spring units comprises multiple nested springs with primary springs having greater axial length than one or more secondary springs so that the primary springs alone provide the necessary supportive capacity to yieldingly support the weight due to an empty or slightly loaded car. When cars are heavily loaded, the secondary springs also become supportive and all sets of springs act in unison. To prevent the secondary springs from bouncing and becoming misaligned due to the vehicle's movement on the track, the lower coterminating end coils of the primary and secondary springs are yieldingly bonded together by an elastomeric material.

Abstract: A spring assembly and a method of assembly therefor are provided wherein one or more longitudinal coil springs are retained between two end caps. Each end cap receives a hollow pin, each pin extending axially inwardly therefrom and abutting the other pin. The pins include axially aligned threaded throughbores which receive a threaded stud whereby the pins are maintained in abutting relation. The spring assembly is assembled by means of assembly tools which serve to rotate the pins to allow the stud to be received therein and to space the stud within the pins.

Abstract: A spring hanger assembly for suspending pipelines includes spring carrying means attachable to a supporting structure, a first sprung member carried by the spring carrying means, a second sprung member carried by the first sprung member, and locking means for releasably securing the second sprung member and the spring carrying means against movement relative to one another and thereby securing the first sprung member against movement relative to the spring carrying means and the second sprung member.

Abstract: A recoil assembly for track type vehicle includes a housing having a preloaded spring assembly mounted therein. The housing is an open sided housing having a pair of ends with aligned apertures formed therein. The spring assembly includes a pair of spaced apart seat members confining a pair of compression springs therebetween with adjustable means in between the seat members for compressing the spring. One of the seat members includes a projection extending into the aperture at one end of the housing and the other seat includes means receiving the extension of a bushing extending through the other aperture. This bushing and aperture arrangement retains the spring assembly within the housing. The open side of the housing is provided with a fixed bar and a removable bar for removably confining the spring within the housing in a functional position.

Abstract: 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.

Abstract: 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.

Abstract: Two consecutive portions of a single helical spring having a zig-zag arrangement are mutually interfitted with each other with their turns remaining out of contact, and with their taxes being in substantially tangential contact or, at the most, intersecting at an acute angle not in excess of 10 degrees. The ends of the two portions are firmly connected to each other directly at their deflection points, and the interconnection preferably is connected to one end of a soft spring whose opposite end is fixed to a rigid support. Consecutive helical spring portions may be wound in the same direction or in respective opposite directions.

Abstract: The closure counterbalance is for attachment as a strut between a movable closure which is hingedly fastened to a support structure. The counterbalance includes a pair of tubular members telescopingly connected together in sliding relationship. A compression coil spring within the members urges the members apart. A wooden rod is provided within the tubular members. The wooden rod fixed extends into the spring in sliding relationship therewith to support and guide the spring and prevent the spring from buckling against the inner surface of the tubular members.