Max D Fryrear

US Patent:

40416240, Aug 16, 1977

Filed:

Apr 17, 1974

Appl. No.:

5/461608

Inventors:

Max Dennis Fryrear - Joliet IL

Assignee:

Caterpillar Tractor Co. - Peoria IL

International Classification:

E02F 376

US Classification:

371175

Abstract:

An excavator bucket includes a pair of guide socket structures, each positioned inwardly of and adjacent a sidewall and the rear wall of the bucket. A pair of ripper shanks are included, one associated with each of the guide sockets, to be extended and retracted relative to the bucket. Each ripper shank may be selectively held in a retracted or an extended position relative to the bucket, and may be completely removed from the bucket if desired.

US Patent:

59880139, Nov 23, 1999

Filed:

Dec 1, 1997

Appl. No.:

8/982094

Inventors:

Charles W. Carr - Naperville IL
Max D. Fryrear - Oswego IL
Derek D. Greving - Morton IL
Mary A. Kuhn - Brookfield IL

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

G05G 505

US Classification:

74532

Abstract:

In the operation of construction machines having multiple functions it has been a problem to provide a mounting arrangement for the levers that incorporates low lever effort operational detents without experiencing undue wear within the components. The present invention provides a mounting arrangement for a control lever that has a plurality of upraised ribs defined thereon in a preselected array. A plurality of grooves are positioned on an adjacent bearing member that are positioned to engage the upraised ribs in a first condition of the control lever. The control lever may be rotated out of engagement with the ribs to operate in a second condition while at the same time being engageable with a plurality of operational detents to provided feedback to an operator as to impending operational conditions.