Patent ID: 7458715

Claim:
Releasable coupling arrangement between the tool shank and the motor assembly of hand-held blenders, in particular a coupling arrangement that enables the user to separate the tool shank ( 2 ) from the motor assembly ( 1 ) of the blender when cleaning, maintenance or replacement operations of the tool shank ( 2 ) are to be performed, the connection between which is performed by means of an externally threaded cylindrical nozzle ( 3 ) formed on the underside of the motor assembly ( 1 ), through which the drive shaft is accessed, and a nut portion ( 10 ) complementarily threaded on its inner face formed on the inside of a coupling bell piece ( 8 ) on the proximal end of the tool shank ( 2 ), the inside of the coupling bell also having multiple angularly equally-spaced partitions ( 9 ) that extend radially between said nut portion ( 10 ) and the body of the coupling bell ( 8 ) to form a succession of hollow interior sectors, which is characterised in that the motor assembly ( 1 ) additionally includes a screwing means ( 6 ) on its underside or coupling end, in a position closely adjacent to said nozzle formation ( 3 ), said screwing means ( 6 ) being able to pass through a hole ( 7 b ) formed in the end of a retaining click-in piece ( 7 ), which is kept in place by said screwing means ( 6 ), and in that said retaining click-in piece ( 7 ) consists of a laminar body made from a plastic material formed in such a way that it has a rounded-edged transversal v-shaped bend ( 7 a ) that is designed so that when the piece ( 7 ) is coupled to the end of the motor assembly ( 1 ), the bent portion ( 7 a ) substantially projects from the plane of the base on which it is mounted, thus constituting a means of retaining and maintaining the connection between the tool shank ( 2 ) and the motor assembly ( 1 ) thanks to said bend being housed inside any of the sectors of the bell ( 8 ) that are delimited by two of said successive partitions ( 9 ).