Cross shaft for semitrailer landing gear
OwnerJoseph Belliveauinventor
Life of this patent
Estimating the term…
Abstract
A landing gear having a telescopic cross shaft extending between the cylindrical stub shafts protruding from both screw jacks thereof. The telescopic cross shaft is made of square structural tubing. The telescopic cross shaft has a pair of end-casing members and a central-stem member. The end-casing members have a combined length of less than a distance between the legs of the landing gear. The end-casing members are slidably engaged over both ends of the central-stem member with loose-fit connections. The end-casing members are also respectively mounted over the stub shafts of the landing gear with loose-fit connections.
Claims4
A landing gear for a semitrailer, comprising;
- a pair of spaced-apart telescopic legs each having a jack therein, a stub shaft protruding therefrom, and means for transmitting torque between said stub shaft and said jack;
- said stub shafts in both said legs pointing toward each other and each having a circular cross section;
- a tubular cross shaft having a square cross section, extending between said stub shafts for transmitting torque between said jacks;
- a pair of torque-transmitting connections, each comprising an engagement of an end portion of said cross shaft over one of said stub shafts and a bolt extending diametrically through said end portion of said cross shaft and said one of said stub shafts, said bolt and said cross shaft having relative dimensions such that torsional stresses in said cross shaft when a torque is applied to said cross shaft are concentrated in regions of said end portions of said cross shaft inward relative to extreme fibres in said cross-shaft.
A landing gear in use supporting a front end of a semitrailer, comprising;
- a pair of spaced-apart telescopic legs each having a jack therein, a stub shaft protruding therefrom, and means for transmitting torque between said stub shaft and said jack;
- said stub shafts in both said legs pointing toward each other and each having a circular cross section;
- a tubular cross shaft having a square cross section, extending between said stub shafts for transmitting torque between said jacks;
- a pair of torque-transmitting connections, each comprising an engagement of an end portion of said cross shaft over one of said stub shafts and a bolt extending diametrically through said end portion of said cross shaft and said one of said stub shafts;
- said bolts and said cross shaft having relative dimensions such that torsional stresses in said cross shaft are concentrated in regions of said end portions of said cross shaft inward relative to extreme fibres in said cross-shaft.
Dependencies are inferred from the claim text.