Magnetically damped pneumatic control devices

• US 3,301,141 A
• Filed: 10/20/1964
• Issued: 01/31/1967
• Est. Priority Date: 10/20/1964
• Status: Expired due to Term

• Current Assignee: Robert S. Griffing
• Original Assignee: Robert S. Griffing
• Inventors: Griffing, Robert S.
• Application Number:
  US04/405,097
• Time in Patent Office: 833 Days
• US Class Current: 92/143
• CPC Class Codes: F16F 15/03 using magnetic or electromagnetic means F16F9/53, F16F15/005 take precedence
• CPC Class Codes: H01F 7/08 with armatures

Claims

1. A PNEUMATIC CONTROL DEVICE COMPRISING:

PRESSURE RESPONSIVE MEANS ADAPTED TO BE MOVED IN RESPONSE TO CHANGES IN PRESSURE OF A PNEUMATIC FLUID, A HEAD ON SAID PRESSURE RESPONSIVE MEANS, AT LEAST A PORTION OF SAID HEAD BEING OF A MAGNETICALLY RESPONSIVE MATERIAL, A MAGNET FOR DAMPING THE MOTION OF SAID HEAD LOCATED WITH RESPECT TO SAID HEAD SO THAT AT LEAST A PORTION OF THE MAGNETIC FLUX PRODUCED BY THE MAGNET EXERTS A FORCE ON THE HEAD THROUGH A VARIABLE DISTANCE GAP BETWEEN SAID HEAD AND SAID MAGNET, MEANS ON SAID MAGNET ESTABLISHING A SHUNT GAP FOR FLUX OF THE MAGNET, THE FLUX THROUGH SAID SHUT GAP TENDING TO BE TRANSFERRED TO SAID VARIABLE GAP AS SAID HEAD MOVES CLOSER TO SAID MAGNET, AND MEANS FOR IMPEDING THE TRANSFER OF FLUX FROM SAID SHUT GAP TO SAID VARIABLE GAP.