Patent ID: 11925296
Assignee: J.M. DE JONG DUKE AUTOMATENFABRIEK B.V.
Field: Furniture, games (Other fields)
Classification: CPC A | IPC A

Claim 0:
1. A grinding device comprising a drive means and a grinding housing,
wherein the grinding housing comprises a set of mutually co-acting grinding bodies with mutually facing grinding surfaces which maintain a mutual clearance,
wherein at least a driven grinding body of the set of grinding bodies is suspended rotatably about a central axis thereof in the grinding housing and is coupled, or at least can be coupled, operatively to the drive means for performing a rotation about the central axis during operation,
wherein adjusting means are provided whereby at least an adjustable grinding body of the set of grinding bodies is axially adjustable for imposing a desired mutual clearance between the grinding surfaces,
wherein an adjustment of the adjustable grinding body is limited from a first extreme position to a second extreme position, corresponding to a fixed setting range between a minimal clearance between the two grinding surfaces and a maximum clearance between the two grinding surfaces,
wherein at least one of the first extreme position and the second extreme position of the adjustable grinding body is imposed by a stop which is encountered by the adjusting means in one of the first and second extreme position,
wherein the adjusting means comprise a controllable actuator which is or at least can be operatively coupled to the adjustable grinding body in order to impart thereto a controlled axial adjustment along the central axis,
wherein the adjustable grinding body comprises a primary screw thread which is operatively engaged with a secondary screw thread of the grinding housing,
wherein the actuator comprises an electric motor with an output drive shaft, and
wherein a transmission is provided between the drive shaft of the electric motor and the adjustable grinding body so as to impart to the adjustable grinding body a controlled rotation about a collective screw shaft of the primary and secondary screw thread.