Cable actuator guide for liquid dispenser and associated methods
A cable guide for improving performance and longevity of a dispenser actuator for remotely operating a dispensing unit with a flexible cable connected between a valve of the dispensing unit and the actuator. The cable opens or closes the valve by manipulating the actuator adjacent the discharge end of the tube. The guide is positioned within the actuator in physical contact with the cable. The guide may comprise a thin arched body extending upward from a leading edge to a peak and downward to a trailing edge. The cable can slide over the guide as the the actuator operates the valve. The guide prevents the cable from bending with a small bend radius, e.g., smaller than five or ten or even twenty times a diameter of the cable as the the actuator operates the valve. Methods are disclosed for assembling the actuator with the cable guide.
1. A method of assembling a dispenser actuator for remotely operating a dispensing unit having a proportioner for combining and dispensing a plurality of liquids in a selected proportion and a valve for passing and cutting off at least one of said liquids, the method comprising:
detaching a flexible elongated member operably connected between the valve of the dispensing unit from a lever of the actuator, the flexible elongated member configured to open and close the valve by manipulating the lever of the actuator adjacent the discharge end of the tube;
inserting an arched guide for controlling a path of travel of the flexible elongated member as the actuator is manipulated to operate the valve in the dispensing unit, the step of inserting comprising positioning a leading end of the guide into an opening in the dispenser actuator and under the detached flexible elongated member and elastically deforming a trailing end of the guide to positively engage the trailing end of the guide within the opening in the dispenser actuator; and
routing the flexible elongated member over a peak of the arched guide and re-attaching the flexible elongated member to the lever of the actuator.
2. The method of claim 1 further comprising preventing the flexible elongated member from bending with a bend radius smaller than ten times a diameter of the flexible elongated member while manipulating the lever of the actuator to operate the valve in the dispensing unit.
3. The method of claim 2 , further comprising preventing the flexible elongated member from bending with a bend radius that is smaller than about 20 mm.
4. The method of claim 1 wherein the arched guide is constructed of a thin sheet metal body and the step of elastically deforming the trailing end of the guide comprises bending the sheet metal.
5. The method of claim 4 , wherein the arched guide is fabricated from a sheet metal blank having a thickness between 0.2 and 0.4 mm, a length between 55 and 60 mm, and a width between 12 and 16 mm.
6. The method of claim 1 wherein the arched guide further comprises a recessed channel beginning at the leading end and extending towards but terminating before the trailing end, and the flexible elongated member is disposed within a housing, and wherein the step of positioning the leading end of the guide into the opening in the dispenser actuator and under the detached flexible elongated member further comprises positioning the recessed channel to provide clearance for the housing.
7. The method of claim 6 wherein the channel terminates beyond a midline of the arched guide at a location that is closer to the trailing end than to the leading end.
8. The method of claim 1 wherein the arched guide comprises:
a thin arched body extending upward from a leading end to a peak and downward to a trailing end;
a planar ramped section extending from the leading end towards the peak of the arched body; and
an arcuate deflecting section extending from the end of the planar ramped section and terminating downward at the trailing end, wherein the method further comprises:
manipulating the actuator to operate the valve in the dispensing unit and causing the flexible elongated member to slide over the arcuate deflecting section.
9. The method of claim 1 wherein the arched guide comprises an abrasion resistant coating in at least a portion of the arched guide that is placed into contact with the flexible elongated member.
10. The method of claim 1 wherein the arched guide is constructed of a thin molded body and the step of elastically deforming the trailing end of the guide comprises bending the molded body.
11. A method of assembling a dispenser actuator for remotely operating a dispensing unit having a proportioner for combining and dispensing a plurality of liquids in a selected proportion and a valve for passing and cutting off at least one of said liquids, the method comprising:
providing a dispensing tube having an inlet end and a discharge end, said tube adapted to be in liquid communication with the dispensing unit at the inlet end of the dispensing tube and the dispenser actuator being disposed adjacent the discharge end of said dispensing tube, and a flexible elongated member operably connected between the valve of the dispensing unit and the actuator such that the valve is opened and closed by manipulating a lever of the actuator adjacent the discharge end of the tube;
inserting an arched guide for controlling a path of travel of the flexible elongated member as the actuator is manipulated to operate the valve in the dispensing unit, the step of inserting comprising positioning a leading end of the guide into an opening in the dispenser actuator and under the flexible elongated member and elastically deforming a trailing end of the guide to positively engage the trailing end of the guide within the opening in the dispenser actuator; and
routing the flexible elongated member over a peak of the arched guide and attaching the flexible elongated member to the lever of the actuator.
12. The method of claim 11 further comprising preventing the flexible elongated member from bending with a bend radius smaller than ten times a diameter of the flexible elongated member while manipulating the lever of the actuator to operate the valve in the dispensing unit.
13. The method of claim 12 , further comprising preventing the flexible elongated member from bending with a bend radius that is smaller than about 20 mm.
14. The method of claim 11 wherein the arched guide is constructed of a thin sheet metal body and the step of elastically deforming the trailing end of the guide comprises bending the sheet metal.
15. The method of claim 14 , wherein the arched guide is fabricated from a sheet metal blank having a thickness between 0.2 and 0.4 mm, a length between 55 and 60 mm, and a width between 12 and 16 mm.
16. The method of claim 11 wherein the arched guide further comprises a recessed channel beginning at the leading end and extending towards but terminating before the trailing end, and the flexible elongated member is disposed within a housing, and wherein the step of positioning the leading end of the guide into the opening in the dispenser actuator and under the detached flexible elongated member further comprises positioning the recessed channel to provide clearance for the housing.
17. The method of claim 16 wherein the channel terminates beyond a midline of the arched guide at a location that is closer to the trailing end than to the leading end.
18. The method of claim 11 wherein the arched guide comprises:
a thin arched body extending upward from a leading end to a peak and downward to a trailing end;
a planar ramped section extending from the leading end towards the peak of the arched body; and
an arcuate deflecting section extending from the end of the planar ramped section and terminating downward at the trailing end, wherein the method further comprises:
manipulating the actuator lever to operate the valve in the dispensing unit and causing the flexible elongated member to slide over the arcuate deflecting section.
19. The method of claim 11 wherein the arched guide comprises an abrasion resistant coating in at least a portion of the arched guide that is placed into contact with the flexible elongated member.
20. The method of claim 11 wherein the arched guide is constructed of a thin molded body and the step of elastically deforming the trailing end of the guide comprises bending the molded body.