Strain relief device for sump pump alarm
AssigneeCampbell Hausfeld/Scott Fetzer Company
InventorsLee H. Eckert, Kenneth P. Frey, Scott R. Graham
Life of this patent
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Abstract
A sump pump has a float operated alarm switch mounted on the top end of the pump housing for activating an alarm when water rises above a normal operating level. The alarm is in a remote enclosure with the pump power plug so that plugging in the unit automatically positions the alarm in a desirable location to be heard. The power cord and alarm switch wire extend through a flexible corrugated tube that is attached to the pump housing and the alarm enclosure by strain relief connections that do not compressively crush the tube.
Claims7
A strain relief for an electrical power cord that extends through a flexible corrugated tube, said tube having external and internal alternating circumferential grooves and ridges, said tube having a tube end portion in which a tube support sleeve is received with the power cord extending therethrough, the tube support sleeve being separate and independent of the power cord, the tube support sleeve being received only in the end portion of the tube and not extending through the entire length of the tube, and a pair of opposed parts having opposed ribs received in said external circumferential grooves of said tube around said tube support sleeve, whereby pulling force applied to the tube and cord is relieved at the connection between the tube end portion and the opposed parts.
Dependencies are inferred from the claim text.