40 More particularly, those articles are intended to prevent Member States from making entitlement to and the amount of family benefits dependent on residence of the members of the worker's family in the Member State providing the benefits, so that Community workers are not deterred from exercising their right to freedom of movement (see, inter alia, Case C-12/89 Gatto [1990] ECR I-557, summary publication, and Hoever and Zachow, cited above, paragraph 34).

18 More specifically, the Court has accepted that the aim of Articles 48 to 51 of the Treaty would not be attained if, as a consequence of the exercise of their right to freedom of movement, migrant workers were to lose the advantages in the field of social security guaranteed to them by the laws of a single Member State (see, for example, Case 24/75 Petroni v ONPTS [1975] ECR 1149, paragraph 13; Case 807/79 Gravina v Landesversicherungsanstalt Schwaben [1980] ECR 2205, paragraph 6; Case 284/84 Spruyt, cited above, paragraph 19; and Case C-293/88 Winter-Lutzins, cited above, paragraph 14). Such a consequence could deter Community workers from exercising their right to freedom of movement and would therefore constitute an obstacle to that freedom (see Case C-228/88 Bronzino v Kindergeldkassse [1990] ECR I-531, paragraph 12, and Case C-12/89 Gatto v Bundesanstalt fuer Arbeit [1990] ECR I-557).