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Torsion Bar Dampening Device

IP.com Disclosure Number: IPCOM000097574D
Original Publication Date: 1961-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Mukai, S: AUTHOR

Abstract

This device dampens the overtravel of a torsion bar when the load is suddenly removed and the bar returns to its unstressed position.

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Torsion Bar Dampening Device

This device dampens the overtravel of a torsion bar when the load is suddenly removed and the bar returns to its unstressed position.

A torsion bar 1 is secured at one end to a cross member 2 which restrains the bar against rotation. A cam 3 is fixed to the bar adjacent its opposite end. The cam 3 faces a second cam 4 having a similar surface contour and which is rigidly fixed to one end of a support block 5. A rubber bushing 6 is mounted on the torsion bar at the other end of the block. One end of the bushing is received within a bore in the block and the other end bears against a retaining ring 7 secured to the bar.

When load is applied (upper) through arm 8, the bar is twisted in a direction to cause minimum surface contact between the cam faces. When the load is removed (lower) the two cam faces engage and cause the torsion bar to move axially to compress the bushing between the block and the retaining ring. The deformed bushing acts as a brake against rotation of the bar and the sliding contact between the cam faces provides additional frictional dampening.

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