Compression spring rod
AssigneeBarnes Group Inc., a Delaware corporation
InventorsJack W. Adoline, Thomas J. Fischer
Life of this patent
Estimating the term…
Abstract
A compression spring rod for relatively displacing elements attached to end mounts of the rod assembly comprises a housing having a rod member moveable between extended and retracted positions relative thereto, and a first compression spring in the housing surrounded by a second compression spring for biasing the rod member to one of an extended or retracted position relative to the housing. The two springs are oppositely wound, of different length, of different outside diameter, and of different wire diameter whereby, from a compressed condition, the spring rod exerts an expansion force which increases at a linear rate. Two sets of the springs can be arranged for biasing the rod member to a central position relative to the housing.
Claims27
A compression spring rod comprising a housing having an axis and axially opposite ends, a rod member coaxial with said axis and having an inner end in said housing and an outer end axially outwardly of one of said opposite ends, means including a guide member on said inner end of said rod member supporting said rod member for reciprocation axially of said housing between retracted and extended positions relative thereto, and first and second compression springs each extending between said guide member and the same one of said opposite ends of said housing, said first and second springs being coaxial with one another and with said axis.
A compression spring rod comprising a housing having an axis and axially opposite ends, a rod member coaxial with said axis and having an inner end in said housing and an outer end axially outwardly of one of said opposite ends, means including a guide member on said inner end of said rod and a bushing at said one of said opposite ends supporting said rod for reciprocation axially of said housing between retracted and extended positions relative thereto, and first and second compression springs each extending between said guide member and the other of said opposite ends coaxial with said axis for biasing said rod toward the extended position thereof.
A compression spring rod comprising a housing having an axis and axially opposite ends, a rod member coaxial with said axis and having an inner end in said housing and an outer end axially outwardly of one of said opposite ends, means including a guide member on said inner end of said rod and a bushing at said one of said opposite ends supporting said rod for reciprocation axially of said housing between retracted and extended positions relative thereto, and first and second compression springs each extending between said guide member and said rod bushing coaxial with said axis for biasing said rod toward the extended position thereof.
A compression spring rod comprising a housing having an axis and axially opposite ends, first and second rods coaxial with said axis and having an inner end in said housing and an outer end axially outwardly of a different one of said opposite ends, means including a guide member interconnecting said inner ends of said rods and supporting said rods for reciprocation axially of said housing between retracted and extended positions relative thereto, first and second compression springs each extending between said guide member and one of said opposing ends of said housing coaxial with said axis, third and fourth compression springs each extending between said guide member and the other of said opposite ends of said housing coaxial with said axis, said compression springs biasing said rods toward a central position thereof relative to said housing.
Dependencies are inferred from the claim text.