Exhaust Air Seal for Linear Electric Motor
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
The exhaust seal 50 for linear electric motor 12 yieldably seals exhaust holes 52 through which air exhausts during operation of motor 12 so that ambient air and any contamination carried thereby cannot re-enter motor 12 after operation has ceased. Motor 12 comprises magnets 14 which are in a magnetic circuit including outside ring 20a, end ring 20b, core 20c and magnet support ring 20d. A gap 18 is provided between core 20c and ring 20d, and a self-supporting electric coil 24 is movably disposed in gap 18 and has clearance with core 20c and ring 20d. Carriage 25 is mechanically connected to coil 24 and carries transducer 26 disposed in close proximity to magnetic disk 28. Seal 50 is a cone of silicon rubber having a relatively thick center portion 50a and a relatively thin marginal portion or lip 50b.