Browse Prior Art Database

Exhaust Air Seal for Linear Electric Motor

IP.com Disclosure Number: IPCOM000046904D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Schopp, RE: AUTHOR

Abstract

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.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 64% of the total text.

Page 1 of 2

Exhaust Air Seal for Linear Electric Motor

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. Seal 50 is held in position adjacent flat surface 56 of motor 12 by means of screw 58 which passes through ring-shaped seal guard 60, seal 50 and washer 62 in contact with surface 56. Seal 50 in free condition has a height b greater than its height a as mounted on motor 12, and this ensures that seal 50 is biased against face 56 of motor 12. During operation, disk 28 is driven in direction 54, and air moving through the file cools disk 28 and other parts of the file including motor 12. The cooling air flows through gap 18 about coil 24, through holes 52 and beneath seal 50 to the outside. The force of the air thus flowing ...