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:
Jun. 10, 2025
Filed:
May. 08, 2024
Caterpillar Inc., Peoria, IL (US);
Cody Moore, Robinson, TX (US);
Curtis A. Henning, Dunlap, IL (US);
John Kevin Clemons, Wamego, KS (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A hydraulic hammer includes a housing and a plurality of splines. The housing defines a chamber extending along a longitudinal axis configured to receive a tool. The splines are disposed on an inner surface of the chamber and extend parallel to the longitudinal axis. Each of the splines has a contact surface configured to slidably guide the tool when disposed within the chamber. A treated layer is applied to the contact surface of each spline, the treated layer configured to withstand approximately between 100 MPa to 320 MPa of pressure applied during an operation of the hydraulic hammer without galling. An interface is defined between the contact surface of the splines and a surface of the tool and is configured to facilitate sliding engagement between the treated layer of the contact surface of the splines and the surface of the tool without lubricant during the operation of the hydraulic hammer.