Patent ID: 6474696
Filing Date: 2002-11-05
Classification: A47L

Abstract:
A telescopic extension for a household appliance comprising:an inner tube and an outer tube sliding tightly within each other, a sleeve, a constraining member capable of fastening the inner tube and the outer tube, a thrust element in engagement with the constraining member under the action of a spring, an actuator operatively connected to the thrust element, the inner tube being provided with a row of notches of preselected shape, the outer tube having a tubular end portion, the tubular end portion being provided with a slot, the sleeve being fastened to the tubular end portion, the constraining member, thrust element, and the spring being movably supported in the sleeve, the thrust element being biased by the spring to bear on the constraining member to force the constraining member into one of the notches to lock the inner tube in the outer tube, the actuator selectively disengaging the thrust element from the constraining member to let the constraining member exit from the one of the notches and unlock the inner tube from the outer tube, allowing the inner tube to slide with respect to the outer tube for adjusting the length of the extension, the thrust element being formed by a slider, the slot being spaced from an end of the outer tube, the outer tube extending between the thrust element and the actuator the outer tube to at least partially house the thrust element and the spring, the actuator comprising a piece separate from the thrust element, the actuator having protruding wings capable of penetrating the slot, the tubular end portion having a relief forming a niche, the sleeve being provided with a projection which is inserted in the niche, the sleeve having a hollow wherein the constraining member, thrust element, and spring are completely housed, the thrust element being formed by a slider provided with a narrow portion having recesses, the protruding wings of the actuating means being provided with inner small teeth for selective snap-on coupling with the recesses of the slider.