Surety is performing system maintenance this weekend. Electronic date stamps on new Prior Art Database disclosures may be delayed.
Browse Prior Art Database

Torque direction indicator

IP.com Disclosure Number: IPCOM000247543D
Publication Date: 2016-Sep-15
Document File: 2 page(s) / 150K

Publishing Venue

The IP.com Prior Art Database


A series of concepts which would make the user aware of the direction of rotation of the cutting instrument, making the torque applied perceptible by visual, auditory and/or tactile means.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 83% of the total text.

Page 01 of 2

  Users who are using a rotating cutting device which is powered by a battery or pneumatic powered  driver instrument (e.g. drill or reamer driver) find it difficult to tell which way the instrument it spinning.  They can easily tell when the instrument is spinning but the speed of spin is too fast for the user to  visualise. This means that sometimes users attribute the lack of cutting progress of an instrument to its  bluntness, whereas actually the instrument is spinning  backwards, compressing bone rather than cutting it. 


  The invention is a series of concepts which would make the user aware of the direction of rotation of  the cutting instrument, making the torque applied perceptible by visual, auditory and/or tactile  means.  Ideally, the instrument would disclose its direction of rotation without preventing rotation in either  direction as there will be times when the user deliberately runs the instrument backwards.  the concepts shown in the attachments are: 
1) a ratchet that disengages and makes a noise when running backwards against resistance. 
2) a threaded collar that retracts to reveal a visual indicator 
3) a silicone tube which distorts when under torque and reveals a visual indicator or changes shape  in some noticeable way. ...