Patent ID: 11925295
Assignee: J.M. DE JONG DUKE AUTOMATENFABRIEK B.V.
Field: Furniture, games (Other fields)
Classification: CPC A | IPC A

Claim 15:
16. A grinding device comprising drive means and a grinding housing, which 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, and 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 a first and lower of the set of mutually co-acting grinding bodies is both driven and adjustable, wherein a second and upper grinding body of the set of mutually co-acting grinding bodies is arranged in stationary manner, wherein the second grinding body is connected to the grinding housing in manually detachable manner, wherein the adjusting means comprise a controllable actuator which is or at least can be operatively coupled to said adjustable grinding body in order to impart thereto a controlled axial adjustment along the central axis, wherein said 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.