Browse Prior Art Database

Fluid Jet Operated Reciprocating Actuator

IP.com Disclosure Number: IPCOM000090496D
Original Publication Date: 1969-May-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Mack, WA: AUTHOR

Abstract

In instruments such as microdrilling devices, it is sometimes desirable to provide a gentle, highly controlled reciprocating action, such as is used to give a pecking motion to a microdrill.

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Fluid Jet Operated Reciprocating Actuator

In instruments such as microdrilling devices, it is sometimes desirable to provide a gentle, highly controlled reciprocating action, such as is used to give a pecking motion to a microdrill.

Spade drill 10 is journaled at 12 for reciprocating motion 14 and is provided with pulley 16 having belt 18 which normally urges drill shaft 20 upwardly. Sever 22 is operable in direction 24 to contact the end of shaft 20 for reciprocating it downwardly. Lever 22 executes motion 24 against the force of spring 26 under the urge of a free air jet issuing from orifice 28 through aperture 30 of disk 32. This air jet bears against the paddle-shaped end 34 of lever 22 so long as aperture 30 is in registry with the jet. However, disk 32 is rotated as indicated at 36 by motor 38 and moves aperture 30 out of registry with the jet from orifice 28 so that disk 32 interrupts the jet.

Spring 26 is then operative to lift lever 22 so as to allow shaft 20 to rise. Shortly afterward, however, aperture 40 comes into registry with orifice 28 so that the jet is once again operable against paddle 34, yieldably deflecting lever 22 downwardly to contact shaft 20 once again and urge drill 10 into cutting position against the work 42. Successive apertures 44 and 46 come into registry with the jet so that there is a continuously pulsating force brought to bear against lever
22.

The apertures in disk 32 can be given an arcuate shape so as to provide longer puls...