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US 4,289,415 AGranted
Adjustable coupling device
AssigneeGTE Products Corporation
InventorLawrence W. Fishinger
Life of this patent
Estimating the term…
Abstract
An adjustable coupling structure for the support of lighting fixtures, pipe support racks, and the like utilizes an adjustable coupling device to couple two threaded support rods. The coupling device includes a clearance hole and a parallel threaded hole through a rigid body. The minor diameter of the threaded hole is tangent to the clearance hole thereby providing meshing of the threads of the two rods. Adjustment is provided by turning either of the threaded rods.
Claims13
An adjustable coupling device comprising:
- a single-piece rigid body including an unthreaded first hole therethrough of a diameter adapted to provide clearance for a first threaded rod of a predetermined diameter and a predetermined thread type and including a threaded second hole which is adapted for engaging a second threaded rod of said predetermined diameter and said predetermined thread type, said threaded second hole having a minor thread diameter which is tangent to said first hole and having an axis parallel to an axis of said first hole, whereby, when said first and second threaded rods are inserted into said first and second holes, respectively, of said adjustable coupling device, the threads of said first rod engage the threads of said second rod, said device thereby providing between said rods a coupling which can be adjusted by turning either of said rods.
An adjustable coupling structure comprising:
- a first support rod having one end adapted for coupling to a first structure and an other end which is threaded;
- a second support rod having one end which is threaded and an other end adapted for coupling to a second structure, said first and second rods having equal diameters and the same thread type;
- and
- an adjustable coupling device including a single-piece rigid body having an unthreaded first hole therethrough of a diameter which provides clearance for said threaded end of said first rod and having a threaded second hole therethrough which engages said threaded end of said second rod, said threaded second hole having a minor thread diameter which is tangent to said first hole and having an axis parallel to an axis of said first hole,
- whereby, when said first and second rods are inserted into said first and second holes, respectively, of said adjustable coupling device, the threads of said first rod engage the threads of said second rod, said coupling device thereby providing between said rods a coupling which can be adjusted by turning either of said rods.
2 more elements
Dependencies are inferred from the claim text.