Back to results
US 5,631,511 AGranted
Gear motor with an electric motor having a hollow shaft
AssigneeLeybold Aktiengesellschaft
InventorsWinfried Schulmann, Franz Thimm, Helmut Kaiser
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeLeybold Aktiengesellschaft
InventorsWinfried Schulmann, Franz Thimm, Helmut Kaiser
Estimating the term…
A gear motor (1), with an electric motor (4) whose rotor (7) has a hollow shaft (8), drives, through at least one gear box (26) with at least one drive step, at least one load. For the purpose of compact configuration combined with low vibration, there is coaxially disposed in the hollow shaft (8) an output shaft (19) which can be shifted selectively by means of a first clutch (24) to the hollow shaft (8), and by means of a second clutch (16) via the gear box (26) to the hollow shaft (8). Preferably the clutches are configured as magnetic clutches, and again preferably the first clutch (24) is disposed for the direct shifting of the hollow shaft (8) to the output shaft (19) at the one end of the hollow shaft (8), and the second clutch (16) at the other end of the hollow shaft (8). The gear motor (1) is used preferentially for driving rotary parts in crystal pulling apparatus.
Gear motor (1, 1a) with an electric motor (4) whose rotor (7) has a hollow shaft (8) which is disposed on an output shaft (19, 19a, 19b) and whose torque can be transmitted to the output shaft (19, 19a, 19b) through a transmission (26) with at least one transmission speed and through a first clutch (16), characterized in that the hollow shaft (8) can be engaged with the output shaft (19, 19a, 19b) as desired, so as to produce various speeds of the output shaft (19, 19a, 19b), while circumventing said transmission (26) when desired, by means of a second clutch (24) which can be operated independently of the first clutch.
Gear motor for driving an output shaft, said gear motor comprising
Apparatus for pulling a crystal from a melt according to the Czochralski process, said apparatus comprising
Dependencies are inferred from the claim text.