Push-pull control with crimped swivel tube
AssigneeTeleflex Incorporated
InventorDennis Graham
Life of this patent
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Abstract
A motion transmitting remote control assembly (10) including a core element (12) movably supported by a conduit (16) with a unique swivel tube joint between a fitting (18) and a swivel tube (26) wherein a counterbore (34) is formed to define a female end in the swivel tube (26), the counterbore (34) being larger in diameter than the bore (27) in the swivel tube (26) which supports a core end rod (14). The swivel tube (26) is retained on the head (30) and groove (32) portion of the end fitting (18) by having deformations (38) crimped into the counterbored section of the swivel tube (26) with the deformations being spaced from the bottom of the groove (32).
Claims9
A motion transmitting remote control assembly (10) for transmitting motion in a curved path by a flexible core element, said assembly (10) comprising:
- a flexible motion transmitting core element (12),
- a conduit (16) having first and second ends and movably supporting said core element (12),
- a fitting (18) disposed on said first end of said conduit (16), and
- a swivel tube (26) made of metal and having a distal end and an inner end pivotally attached to said fitting (18) at a swivel joint for swiveling movement relative to said fitting (18) and movably supporting said core element (12),
- said fitting (18) defining a male portion of said swivel joint and said swivel tube (26) presenting a female portion of said swivel joint disposed about said male portion for swiveling movement about said male portion,
- said swivel tube (26) having a bore (27) extending longitudinally therethrough and said female portion is defined by a counterbore (34) extending into said inner end of said swivel tube (26) to define a counterbored section, said male portion including an annular head (30) at the end of said fitting (18) and a groove (32) adjacent said head (30), said counterbore (34) being larger than said bore (27), said swivel joint being further defined by at least one deformation (38) disposed along said counterbored section and extending radially inwardly and into said groove (32) of said male portion for retaining said swivel tube (26) on said fitting (18) for said swiveling movement, said deformation (38) being radially spaced from said groove (32) to provide a radial space between said deformation (38) and said groove (32) to facilitate said swiveling movement.
A method of fabricating a motion transmitting remote control assembly (10) for transmitting motion in a curved path by a flexible core element (12) movably supported in a conduit (16) having a first fitting (18) disposed on the end of the conduit (16) and a swivel tube (26) made of metal and having a distal end and an inner end pivotally attached to the fitting (18) at a swivel joint for swiveling movement relative to the fitting (18) and movably supporting the core element (12) in a bore (27) extending between the distal and inner ends thereof,
- forming an annular head (30) at the end of the fitting (18) and forming a groove (32) in the fitting (18) adjacent to the head (30) forming a female portion of the swivel joint in the inner end of the swivel tube (26) by forming a counterbore (34) of a larger diameter than the diameter of the bore (27) and extending into the inner end of the swivel tube (26) to define a counterbored section, and disposing the counterbore (34) about the male portion for swiveling movement about the male portion, forming at least one deformation (38) disposed along the counterbored section and extending radially inwardly and into the groove (32) of the male portion for retaining the swivel tube (26) on the fitting (18) for the swiveling movement, limiting the extent of the deformation (38) radially into the groove (32) to provide a radial space between the deformation (38) and the groove (32) to facilitate the swiveling movement.
Dependencies are inferred from the claim text.