Variable-restriction valve

• US 3,093,155 A
• Filed: 06/20/1960
• Issued: 06/11/1963
• Est. Priority Date: 06/20/1960
• Status: Expired due to Term

• Current Assignee: Leslie J. Dawes
• Original Assignee: Leslie J. Dawes
• Inventors: Dawes, Leslie J.
• Application Number:
  US04/037,217
• Time in Patent Office: 1,086 Days
• US Class Current: 137/269
• CPC Class Codes: F15B 11/04 for controlling the speed F15B11/024 takes precedence
• CPC Class Codes: F15B 2211/30525 Directional control valves, e.g. 4/3-directional control valve
• CPC Class Codes: F15B 2211/40515 with variable throttles or orifices
• CPC Class Codes: F15B 2211/7052 Single-acting output members
• CPC Class Codes: F15B 2211/75 Control of speed of the output member
• CPC Class Codes: F15B 2211/7716 with automatic return
• CPC Class Codes: Y10T 137/5109 Convertible
• CPC Class Codes: Y10T 137/7834 Valve seat or external sleeve moves to open valve
• CPC Class Codes: Y10T 137/7859 Single head, plural ports in parallel

Claims