Load indicator for material handling vehicle

• US 3,154,160 A
• Filed: 06/14/1962
• Issued: 10/27/1964
• Est. Priority Date: 06/14/1962
• Status: Expired due to Term

• Current Assignee: Harvey W. Roekwell
• Original Assignee: Harvey W. Roekwell
• Inventors: Roekwell, Harvey W.
• Application Number:
  US04/202,599
• Time in Patent Office: 866 Days
• US Class Current: 177/141
• CPC Class Codes: G01G 19/083 lift truck scale
• CPC Class Codes: Y10S 280/90 Runner vehicle attachments
• CPC Class Codes: Y10S 37/906 Visual aids and indicators for excavating tool

Claims

1. A LOAD INDICATING MECHANISM FOR A MATERIAL HANDLING VEHICLE OF THE TYPE HAVING FRONT AND REAR WHEELED UNITS PIVOTALLY INTERCONNECTED ON A TRANSVERSE AXIS AND AT LEAST ONE HYDRAULIC RAM BETWEEN SAID UNITS FOR CAUSING RELATIVE PIVOTING OF THE LATTER ABOUT SAID AXIS BETWEEN RAISED AND LOWERED POSITIONS, SAID MECHANISM COMPRISING:

HYDRAULIC FLUID SUPPLY AND CONTROL MEANS FOR SAID RAM INCLUDING A VALVE MOVABLE FROM A NEUTRAL POSITION, IN WHICH FLUID IS BLOCKED IN SAID RAM, TO RAISE AND LOWER POSITIONS, MEANS FOR INDICATING THE WEIGHT OF THE MATERIAL BEING TRANSPORTED IN SAID VEHICLE INCLUDING AN INDICATOR RESPONSIVE TO THE PRESSURE IN THE LOAD SUPPORTING END OF SAID RAM, MEANS PREVENTING SAID INDICATOR FROM BEING OPERATIVE TO INDICATE THE WEIGHT OF MATERIAL CARRIED BY SAID VEHICLE WHEN SAID UNITS ARE PIVOTED OUT OF THEIR RAISED POSITION, AND MEANS PREVENTING SAID INDICATOR FROM BEING OPERATIVE TO INDICATE THE WEIGHT OF MATERIAL CARRIED BY SAID VEHICLE WHEN SAID VALVE IS MOVED OUT OF ITS NEUTRAL POSITION.