System for the automatic recovery of play between a worm and worm gear

Claim 2

An improved system for the automatic recovery of play between a worm (18) and a worm gear (16), comprising: resilient biasing means (55) for resiliently biasing said worm toward said worm gear in a direction substantially radial to said worm gear, said biasing means being accommodated in a seat formed by a flanged sleeve (58) threaded-inwardly and carrying a screwed-on ring nut (60) having a central hole, a flat-headed pin (62) slidably-mounted in the interior of said sleeve and forming a pushing means for a plurality of cup springs (66) arranged between said ring nut and said pin.

Claim 3

An improved system as claimed in claim 1 wherein said worm is pivotally-mounted at one end, and said resilient biasing means is arranged at the opposed end of said worm.

Claim 4

An improved system as claimed in claim 1 wherein said resilient biasing means is arranged at both ends of said worm.

Claim 5

An improved system as claimed in claim 1 wherein said worm is rotatably-mounted in a movable box and radially-biased by said resilient biasing means.

Claim 6

An improved system as claimed in claim 1 wherein said worm is accommodated in a movable assembly pivotally mounted at one end by a pair of pivots arranged perpendicularly to the axis of rotation of said worm in the interior of a pair of sleeves fixed on an upper wall and a lower wall of a box type casing, said movable assembly being resiliently-biased at the opposite end by said resilient biasing means.

Claim 7

An improved system as claimed in claim 1 further comprising: a movable assembly (28) carrying said worm in its interior, said movable assembly being provided at its respective ends with two of said resilient biasing means (76, 76').

Claim 8

A worm unit for automatically recovering play between a worm and a worm gear, comprising: a worm casing mounted to a worm gear casing, said worm pivotably-mounted at an end of said worm casing; a biasing device mounted at an opposite end of said worm casing and adapted to bias said worm toward said worm gear in a direction substantially radial to said worm gear; a cylindrical sleeve mounted on said worm casing; a ring nut threadably-inserted in said sleeve; a pin formed with a stem and a head, said stem slidably-positioned in said ring nut and said head slidably-positioned in said sleeve; and a spring positioned on said stem between said ring nut and said sleeve.

Claim 9

A worm unit for automatically recovering play between a worm and a worm gear, comprising: a worm casing mounted to a worm gear casing, said worm pivotably-mounted at an end of said worm casing; a biasing device mounted at an opposite end of said worm casing and adapted to bias said worm toward said worm gear in a direction substantially radial to said worm gear; a cylindrical sleeve mounted on said worm casing; a ring nut threadably-inserted in said sleeve; a pin formed with a stem and a head, said stem slidably-positioned in said ring nut and said head slidably-positioned in said sleeve; and a spring positioned on said stem between said ring nut and said sleeve.