Back to results
US 4,306,209 AGranted
Sound-proofed choke
AssigneeSiemens Aktiengesellschaft
InventorsJoachim Choschzick, Helmut Nieke
Life of this patent
Estimating the term…
Abstract
A choke for use with alternating current has a ventilated housing with a perforate inner wall and an imperforate outer wall to which the choke is connected vibration-elastically. The space between the inner wall and the jacket is filled with a sound-absorbing material.
Claims2
A sound-damped electric choke comprising:
- a choke having a winding adapted for use with alternating currents and having a mount;
- a housing through which ventilating air can pass, the housing comprising a perforate inner wall and an imperforate outer wall;
- sound dampening means connecting the mount to the outer wall;
- and
- sound damping material in the space between the inner wall and the outer wall.
2 more elements
Dependencies are inferred from the claim text.