Pressure rise delaying valve for hydraulically actuated clutches

• US 3,215,236 A
• Filed: 08/01/1963
• Issued: 11/02/1965
• Est. Priority Date: 08/04/1962
• Status: Expired due to Term

• Current Assignee: Pietro Pensa
• Original Assignee: Pietro Pensa
• Inventors: PIETRO PENSA
• Application Number:
  US04/299,402
• Time in Patent Office: 824 Days
• US Class Current: 192/85.63
• CPC Class Codes: F16D 25/12 Details not specific to one of the before-mentioned types
• CPC Class Codes: Y10T 137/7768 Pilot controls supply to pressure chamber
• CPC Class Codes: Y10T 137/7781 With separate connected fluid reactor surface

Claims

1. THE COMBINATION COMPRISING:

A FRICTION CLUTCH INCLUDING A HYDRAULIC ACTUATOR;

A SUPPLY PASSAGE CONNECTED TO SAID ACTUATOR;

AND A DEVICE FOR REGULATING THE TIME REQUIRED TO REACH A PRESSURE OF PREDETERMINED VALUE IN SAID SUPPLY PASSAGE INCLUDING A HOUSING HAVING A PRESSURE CHAMBER, AN INLET CONNECTED TO SAID SUPPLY PASSAGE, AN OUTLET ADAPTED FOR CONNECTION OT A RESERVOIR AND A VALVE SEAT INTERMEDIATE SAID INLET AND OUTLET, A MOVABLE VALVE MEMBER HAVING A CLOSED POSITIONWHEN SEATED ON SAID SEAT, A PLUNGER RECIPROCABLY MOUNTED IN SAID PRESSURE CHAMBER, A BIASING SPRING INTERPOSED BETWEEN SAID PLUNGER AND SAID MOVABLE VALVE MEMBER, AND FLOW RESTICTING MEANS BETWEEN SAID SUPPLY PASSAGE AND SAID PRESSURE CHAMBER INCLUDING A BIASED ONE WAY PILOT VALVE MOVING FROM A CLOSED POSITION TO AN OPEN POSITION UPON THE PRESSURE IN SAID SUPPLY PASSAGE EXCEEDING THE PRESSURE IN SAID PRESSURE CHAMBER BY A PREDETERMINED VALUE, SID PILOT VALVE PREVENTING FLOE THROUGH SAID FLOW RESTRICTING MEANS IN THE DIRECTION FROM SAID PRESSURE CHAMBER TO SAID SUPPLY PASSAGE.