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A supermarket trolley comprising a base with wheels and a basket both made of a moulded plastic material. The basket is connected posteriorly to a pair of uprights of the base by means of respective substantially comb like formations mutually complementary and meshing with each other, whereto are as

A supermarket trolley comprising a base with wheels and a basket both made of a moulded plastic material. The basket is connected posteriorly to a pair of uprights of the base by means of respective substantially comb like formations mutually complementary and meshing with each other, whereto are associated mutually engaged tongue and groove elements.

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What is claimed is: 1. A supermarket trolley comprising a base made of moulded plastic material with wheels and two lateral uprights integral with the base and connected superiorly by a transverse bar and a basket container also made of moulded plastic material, connected at an end to said two late

What is claimed is: 1. A supermarket trolley comprising a base made of moulded plastic material with wheels and two lateral uprights integral with the base and connected superiorly by a transverse bar and a basket container also made of moulded plastic material, connected at an end to said two lateral uprights, wherein said two lateral uprights of the base and said ends of the basket have respective mutually facing surfaces formed with substantially comb like formations mutually complementary and meshed following a relative coupling motion between said basket and said base along a direction of coupling when the trolley is assembled, and wherein said direction of coupling is substantially parallel to said uprights. 2. A trolley as claimed in claim 1, wherein said two lateral uprights and said end of the basket are formed with tongue and groove elements designed to engage each other as a result of the meshing between said comb like formations. 3. A trolley as claimed in claim 2, wherein said tongue and groove elements include, for each upright, a pair of respectively upper and lower seats designed to house a pair of corresponding upper and respectively lower projections of the basket. 4. A trolley as claimed in claim 1, wherein said comb like formations comprise a plurality of parallel projections generally elongated in said direction of coupling. 5. A trolley as claimed in claim 4, wherein said elongated projections are slightly inclined relative to said direction of coupling. 6. A trolley as claimed in claim 1, wherein said base and said basket are capable of being mutually locked relative to said direction of coupling by means of said transverse bar. 7. A trolley as claimed in claim 1, wherein said basket is open in correspondence with said end. 8. A trolley as claimed in claim 7, further including a child seat assembly applied in correspondence with said open end of the basket by means of said transverse bar. 9. A trolley as claimed in claim 1, wherein said base has a double "L" configuration whose vertical branches constitute said uprights and whose horizontal branches are interconnected by a front transverse member (5) and support a bearing plane. 10. A trolley as claimed in claim 1, wherein said end of the basket includes a pair of elongated elements with respective legs projecting underneath the basket. 11. A supermarket trolley comprising a base made of moulded plastic material with wheels and a support formed integral with the base and including two lateral uprights connected superiorly by a transverse bar and a basket container also made of moulded plastic material, connected at an end to said two lateral uprights, wherein said two lateral uprights of the base and said ends of the basket have respective mutually facing surfaces formed with substantially comb like formations mutually complementary and meshed following a relative coupling motion between said basket and said base along a direction of coupling when the trolley is assembled, wherein said direction of coupling is substantially parallel to said uprights. 12. A trolley as claimed in claim 11, wherein said two lateral uprights and said end of the basket are formed with tongue and groove elements designed to engage each other as a result of the meshing between said comb like formations. 13. A trolley as claimed in claim 11, wherein said tongue and groove elements include, for each upright, a pair of respectively upper and lower seats designed to house a pair of corresponding upper and respectively lower projections of the basket. 14. A trolley as claimed in claim 11, wherein said comb like formations comprise a plurality of parallel projections generally elongated in said direction of coupling. 15. A trolley as claimed in claim 11, wherein said elongated projections are slightly inclined relative to said direction of coupling. 16. A trolley as claimed in claim 11, wherein said base and said basket are capable of being mutually locked relative to said direction of coupling by means of said transverse bar. 17. A trolley as claimed in claim 11, wherein said basket is open in correspondence with said end. 18. A trolley as claimed in claim 11, further including a child seat assembly applied in correspondence with said open end of the basket by means of said transverse bar. 19. A trolley as claimed in claim 11, wherein said base has a double "L" configuration whose vertical branches constitute said uprights and whose horizontal branches are interconnected by a front transverse member (5) and support a bearing plane. 20. A trolley as claimed in claim 11, wherein said end of the basket includes a pair of elongated elements with respective legs projecting underneath the basket. 21. A supermarket trolley comprising a base made of moulded plastic material with wheels and two lateral uprights integral with the base and connected superiorly by a transverse bar and a basket container also made of moulded plastic material, connected at an end to said two lateral uprights, wherein said two lateral uprights of the base and said ends of the basket have respective mutually facing surfaces formed with substantially comb like formations mutually complementary and meshed following a relative coupling motion between said basket and said base along a direction of coupling when the trolley is assembled, and wherein said direction of coupling is substantially parallel to said uprights, wherein said two lateral uprights and said end of the basket are formed with tongue and groove elements designed to engage each other as a result of the meshing between said comb like formations, and wherein said tongue and groove elements include, for each upright, a pair of respectively upper and lower seats designed to house a pair of corresponding upper and respectively lower projections of the basket.