HYDRAULIC POWER UNIT FOR A DOUBLEACTING CYLINDER

• US 3,425,574 A
• Filed: 01/25/1967
• Issued: 02/04/1969
• Est. Priority Date: 01/25/1967
• Status: Expired due to Term

• Current Assignee: Becor Western, Inc. (Caterpillar Incorporated)
• Original Assignee: Learmont Tom, Theodore M. Willgrubs, William H. Smith
• Inventors: Willgrubs, Theodore M., Smith, William H., LEARMONT TOM
• Application Number:
  US04/611,663
• Time in Patent Office: 741 Days
• US Class Current: 414/690
• CPC Class Codes: E02F 3/30 with a dipper-arm pivoted on a cantilever beam , i.e. boom
• CPC Class Codes: E02F 3/308 working outwardly
• CPC Class Codes: E02F 3/427 with mechanical drives by cables or hoisting ropes E02F3/46 take precedence

Claims