Invention Grant
- Patent Title: Mast with hydraulic circuit for assist cylinder
-
Application No.: US16028498Application Date: 2018-07-06
-
Publication No.: US10774589B2Publication Date: 2020-09-15
- Inventor: Friedrich K. Diecke
- Applicant: Caterpillar Global Mining Equipment LLC
- Applicant Address: US TX Denison
- Assignee: Caterpillar Global Mining Equipment LLC
- Current Assignee: Caterpillar Global Mining Equipment LLC
- Current Assignee Address: US TX Denison
- Agency: Oblon, McClelland, Maier & Neustadt LLP
- Main IPC: E21B7/02
- IPC: E21B7/02 ; E21B15/04 ; F15B11/20 ; E21B15/00 ; E04H12/34 ; F15B15/06 ; F15B13/02

Abstract:
A mast assembly that includes a mast and a hydraulic circuit for moving the mast. The hydraulic circuit includes a primary hydraulic cylinder coupled to the mast to rotate the mast about a pivot axis and a secondary hydraulic cylinder extending from a rod end to a cap end that is fluidly coupled to the primary hydraulic cylinder. A directional valve is fluidly coupled between the primary hydraulic cylinder and secondary hydraulic cylinder to keep a pressure on the cap end of the secondary hydraulic cylinder greater than the pressure on the rod end of the secondary hydraulic cylinder during all operating conditions.
Public/Granted literature
- US20200011353A1 MAST WITH HYDRAULIC CIRCUIT FOR ASSIST CYLINDER Public/Granted day:2020-01-09
Information query