Conduit end fitting with integrated guide tube for a push-pull cable assembly
View Patent ↗A motion transmitting cable assembly includes a cable having a conduit and a core longitudinally movable within the conduit, a core attachment secured to an end of the core, and a conduit abutment fitting having a main body secured to an end of the conduit and a guide tube extending from the main body and slidably receiving the core attachment therein. The conduit abutment fitting is formed of plastic and the guide tube is unitary with the main body so that the conduit abutment fitting is a molded plastic one-piece component. The guide tube is bendable so that the core attachment can pivot relative to the main body to account for rotational motion of the control member. The guide tube is preferably bendable at least 7 degrees in all directions with a bending force of no more than 4.5 N.
1. A motion transmitting cable assembly, said motion transmitting cable assembly comprising, in combination:
a cable having a conduit and a core longitudinally movable within the conduit;
a core attachment secured to an end of the core;
a conduit abutment fitting having a main body secured to an end of the conduit and a guide tube extending from the main body and slidably receiving the core attachment therein;
wherein the guide tube is unitary with the main body so that the conduit abutment fitting is a unitary one-piece component;
wherein a portion of the guide tube between the main body and the core attachment resiliently bends when the core attachment pivots relative to the main body;
wherein the portion of the guide tube resiliently bends in all directions as the core attachment pivots relative to the main body in each axis perpendicular to a longitudinal axis of the conduit abutment fitting;
wherein the portion of the guide tube that resiliently bends in each axis perpendicular to the longitudinal axis of the conduit abutment fitting is configured to have a higher flexibility for resiliently bending in each axis perpendicular to the longitudinal axis than another portion of the guide tube between the core attachment and an end of the guide tube opposite the main body which defines a linear line of force as the core attachment slides within the guide tube; and
wherein the guide tube resiliently bends at least 7 degrees with a bending force of no more than 4.5 N.
2. The cable assembly according to claim 1 , wherein a passage of the guide tube receiving the core attachment is non-circular in cross-section and the core attachment is non-circular in cross-section.
3. The cable assembly according to claim 2 , wherein the passage and the core attachment are each square in cross-section.
4. The cable assembly according to claim 1 , wherein a passage of the guide tube receiving the core attachment is circular in cross-section and the core attachment is circular in cross-section.
5. The cable assembly according to claim 1 , wherein the guide tube resiliently bends at least 7 degrees in all directions with the bending force of no more than 4.5 N.
6. The cable assembly according to claim 1 , wherein the portion of the guide tube that resiliently bends is shaped to increase flexibility of the guide tube for bending in each axis perpendicular to the longitudinal axis.
7. The cable assembly according to claim 1 , wherein the portion of the guide tube that resiliently bends has a wall section with a thickness less than adjacent wall sections to increase flexibility of the guide tube for resiliently bending in each axis perpendicular to the longitudinal axis.
8. The cable assembly according to claim 1 , wherein the portion of the guide tube that resiliently bends is provided with a circumferentially extending groove encircling the longitudinal axis to increase flexibility of the guide tube for resiliently bending in each axis perpendicular to the longitudinal axis.
9. The cable assembly according to claim 1 , wherein the portion of the guide tube that resiliently bends is provided with a plurality of longitudinally spaced apart and circumferentially extending grooves each encircling the longitudinal axis to increase flexibility of the guide tube for resiliently bending in each axis perpendicular to the longitudinal axis.
10. A motion transmitting cable assembly, said motion transmitting cable assembly comprising, in combination:
a cable having a conduit and a core longitudinally movable within the conduit;
a core attachment secured to an end of the core;
a conduit abutment fitting having a main body secured to an end of the conduit and a guide tube extending from the main body and slidably receiving the core attachment therein;
wherein main body and the guide tube each comprise plastic;
wherein the guide tube is unitary with the main body so that the conduit abutment fitting is a unitary one-piece component;
wherein a portion of the guide tube between the main body and the core attachment resiliently bends when the core attachment pivots relative to the main body;
wherein the portion of the guide tube resiliently bends in all directions as the core attachment pivots relative to the main body in each axis perpendicular to a longitudinal axis of the conduit abutment fitting;
wherein the portion of the guide tube that resiliently bends in each axis perpendicular to the longitudinal axis of the conduit abutment fitting is shaped to have a higher flexibility for resiliently bending in each axis perpendicular to the longitudinal axis than another portion of the guide tube between the core attachment and an end of the guide tube opposite the main body which defines a linear line of force as the core attachment slides within the guide tube; and
wherein the guide tube resiliently bends at least 7 degrees with a bending force of no more than 4.5 N.
11. The cable assembly according to claim 10 , wherein a passage of the guide tube receiving the core attachment is non-circular in cross-section and the core attachment is non-circular in cross-section.
12. The cable assembly according to claim 10 , wherein the passage and the core attachment are each square in cross-section.
13. The cable assembly according to claim 10 , a passage of the guide tube receiving the core attachment is circular in cross-section and the core attachment is circular in cross-section.
14. The cable assembly according to claim 10 , wherein the guide tube resiliently bends at least 7 degrees in all directions with the bending force of no more than 4.5 N.
15. The cable assembly according to claim 10 , wherein the portion of the guide tube that resiliently bends has a wall section with a thickness less than adjacent sections to increase flexibility of the guide tube for resiliently bending in each axis perpendicular to the longitudinal axis.
16. The cable assembly according to claim 10 , wherein the portion of the guide tube that resiliently bends is provided with a circumferentially extending groove encircling the longitudinal axis to increase flexibility of the guide tube for resiliently bending in each axis perpendicular to the longitudinal axis.
17. The cable assembly according to claim 10 , wherein the portion of the guide tube that resiliently bends is provided with a plurality of longitudinally spaced apart and circumferentially extending grooves each encircling the longitudinal axis to increase flexibility of the guide tube for resiliently bending in each axis perpendicular to the longitudinal axis.
18. A motion transmitting cable assembly, said motion transmitting cable assembly comprising, in combination:
a cable having a conduit and a core longitudinally movable within the conduit;
a core attachment secured to an end of the core;
a conduit abutment fitting having a main body secured to an end of the conduit and a guide tube extending from the main body and slidably receiving the core attachment therein;
wherein conduit abutment fitting comprises plastic and the guide tube is unitary with the main body so that the conduit abutment fitting is molded plastic one-piece component;
wherein a portion of the guide tube between the main body and the core attachment resiliently bends when the core attachment pivots relative to the main body;
wherein the portion of the guide tube resiliently bends in all directions as the core attachment pivots relative to the main body in each axis perpendicular to a longitudinal axis of the conduit abutment fitting;
wherein the portion of the guide tube that resiliently bends in each axis perpendicular to the longitudinal axis of the conduit abutment fitting is provided with at least one circumferentially extending groove encircling the longitudinal axis to have a higher flexibility for resiliently bending in each axis perpendicular to the longitudinal axis than another portion of the guide tube between the core attachment and an end of the guide tube opposite the main body which defines a linear line of force as the core attachment slides within the guide tube; and
wherein the guide tube resiliently bends at least 7 degrees in all directions with a bending force of no more than 4.5 N.