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Browse Prior Art Database

Plastic Insert

IP.com Disclosure Number: IPCOM000089985D
Original Publication Date: 1969-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Trammell, RI: AUTHOR

Abstract

When assembling a threaded part to a reciprocating threaded part, there is a problem of stripping the threads, particularly when one part is dropped onto the other for assembly. This problem arises in the operation of disk files, when removing a disk pack from the disk drive. A disk pack cover, which has knob assembly 10 having threaded element 12, is lowered onto the disk drive spindle assembly. To alleviate the thread stripping problem, resilient spring 14 is incorporated in the knob assembly to absorb the shock of the axial force experienced during assembly. To maintain spring 12 within assembly 10, slotted plastic cap 16 having annular groove 18 is placed into the knob opening. Groove 18 engages a projection or ledge 20 formed on the inner wall of the knob.

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Plastic Insert

When assembling a threaded part to a reciprocating threaded part, there is a problem of stripping the threads, particularly when one part is dropped onto the other for assembly. This problem arises in the operation of disk files, when removing a disk pack from the disk drive. A disk pack cover, which has knob assembly 10 having threaded element 12, is lowered onto the disk drive spindle assembly. To alleviate the thread stripping problem, resilient spring 14 is incorporated in the knob assembly to absorb the shock of the axial force experienced during assembly. To maintain spring 12 within assembly 10, slotted plastic cap 16 having annular groove 18 is placed into the knob opening. Groove 18 engages a projection or ledge 20 formed on the inner wall of the knob. Slotted portion 22 of the plastic cap expands to lock the cap into position. No tapping or screws are required.

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