Chunhui Pan

US Patent:

8265912, Sep 11, 2012

Filed:

Dec 19, 2008

Appl. No.:

12/318005

Inventors:

Ashok Rajendran - Tamil Nadu, IN
Chijie Lin - Houston TX, US
Chunhui Pan - Dunlap IL, US

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

G06G 7/48

US Classification:

703 7, 703 1, 73804, 702 34

Abstract:

The present disclosure is directed to a computer-implemented method for modeling a mounting assembly having a mounting strap configured to couple a component to a bracket. The method includes modeling a loosened configuration of the mounting strap, wherein the loosened configuration provides a first substantially continuous curvature of portions of the mounting strap engaged with the bracket and the component. The method also includes applying simulated stresses to the mounting strap in the loosened configuration and outputting failure mode information of the mounting strap based on the simulated stresses on the mounting strap.

US Patent:

20060283615, Dec 21, 2006

Filed:

Jun 14, 2006

Appl. No.:

11/452377

Inventors:

Lauritz Pillers - Shorewood IL, US
Chunhui Pan - Dunlap IL, US

International Classification:

B23B 45/16

US Classification:

173210000, 173128000

Abstract:

A tool assembly (), for example a hydraulic or pneumatic hammer assembly, comprises a housing () defining a chamber (), a reciprocating work tool () arranged in the chamber for cyclical movement in a work stroke and a return stroke, and a tool retention member () arranged to restrain the work tool at the end of the work stroke. The tool assembly () includes a shock absorber arranged to absorb impact from the work tool at the end of a stroke. The shock absorber comprises an annular resilient flange (), which may be cantilevered from the tool retention member () to absorb impact at the end of the work stroke or may be provided on a bushing () arranged to absorb impact at the end of the return stroke. The shock absorbing flange reduces the transmission of shocks into the tool assembly, thereby providing increased life for tool assembly components.

US Patent:

20190353557, Nov 21, 2019

Filed:

May 21, 2018

Appl. No.:

15/984539

Inventors:

- Deerfield IL, US
Yong Sun - Dunlap IL, US
Mingang Wang - Dunlap IL, US
Xuefei Hu - Dunlap IL, US
Zhaoxu Dong - Dunlap IL, US
Chunhui Pan - Edwards IL, US

Assignee:

Caterpillar Inc. - Deerfield IL

International Classification:

G01M 13/04
E21B 43/26
G01M 13/02

Abstract:

A rig management system is disclosed. The rig management system may be configured to receive vibration data from a set of sensors installed on one or more elements of a hydraulic fracturing rig. The rig management system may be configured to perform a first processing of the vibration data utilizing a moving window technique to identify a possible failure of a set of bearings. The rig management system may be configured to perform a second processing utilizing a set of processing techniques after identifying the possible failure of the set of bearings. The rig management system may be configured to determine that the possible failure is an actual failure based on a result of performing the second processing. The rig management system may be configured to perform an action after determing that the possible failure is the actual failure.