PNEUMATIC CONTROL SYSTEM AND VENT VALVE THEREFOR

• US 3,424,090 A
• Filed: 06/26/1967
• Issued: 01/28/1969
• Est. Priority Date: 06/26/1967
• Status: Expired due to Term

• Current Assignee: Paul E. Hyde
• Original Assignee: Paul E. Hyde
• Inventors: Hyde, Paul E.
• Application Number:
  US04/648,801
• Time in Patent Office: 582 Days
• US Class Current: 417/36
• CPC Class Codes: F04D 15/0066 by changing the speed, e.g. of the driving engine
• CPC Class Codes: G05D 13/00 Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
• CPC Class Codes: G05D 9/12 characterised by the use of electric means
• CPC Class Codes: Y10T 137/7287 Liquid level responsive or maintaining systems
• CPC Class Codes: Y10T 137/7339 By weight of accumulated fluid

Claims