The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2026
Filed:
May. 13, 2024
Caterpillar Inc., Peoria, IL (US);
Anand Subbiah, Chennai, IN;
R Prasana, Chennai, IN;
Jegatheesh Chidambaram, Nagercoil, IN;
Partiban Chengalvarayan, Chennai, IN;
Caterpillar Inc., Peoria, IL (US);
Abstract
A system for moving a mast of a drilling machine includes a hydraulic actuator defining a rod end and a head end. The rod end of the hydraulic actuator is coupled to the mast to move the mast about a pivot axis. The system also includes a fluid line in fluid communication with the head end of the hydraulic actuator. The system further includes a counterbalance valve disposed in the fluid line. The counterbalance valve is disposed in fluid communication with the head end of the hydraulic actuator. The counterbalance valve includes an atmospheric vent passage. During a lowering operation of the mast, a back pressure in the hydraulic actuator is alleviated, via the atmospheric vent passage.