Self-propelled trenching machine
United States Patent D266765
US Patent References:
Power steering means for wheeled vehicles
Wagner - February, 1959 - 2874793

/3006427.html
Van Der Lely - October, 1961 - 3006427

Digging attachment
Golden - August, 1966 - 3266179

METHOD OF MAKING A CUTTER FOR A TRENCHING DEVICE
Allds et al. - October, 1970 - 3533311

SPEED CONTROL SYSTEM FOR VEHICLE MOUNTING A WORK PERFORMING DEVICE
Eaton - August, 1973 - 3750762


Inventors:
Clune, Charles A. (Minster, OH)
Application Number:
D/129522
Publication Date:
11/02/1982
Filing Date:
03/12/1980
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Assignee:
Midmark Corporation (Minster, OH)
Primary Class:
D15/21
Other Classes:
D15/22
Field of Search:
D15/21, D15/22, 37/86, 37/191A, 37/192A
US Patent References:
3754341CHAIN TRENCHER WITH SHOCK-RESISTANT SILENT DRIVEAugust, 1973Caldwell et al.371/91A
3788415HYDRAULIC FRONT-WHEEL PROPULSION SYSTEM FOR HARVESTING VEHICLESJanuary, 1974Tilley180/161
3834049TRENCHING ATTACHMENT FOR A TRACTOR OR THE LIKESeptember, 1974Bond371/91A
3911602Hydraulic and mechanical no-cut earth working machineOctober, 1975Trevathan37/86
Other References:
"Model 1500 Trencher", The Charles Machine Works, Inc. May 1978.
"Davis Trimline 120", J. I. Case, 1977.
Bulletin T2/320, "Arps Model 2000 Trench Devil", Arps Corp.
"Ditch Witch C & M", Charles Machine Works, Inc.
Primary Examiner:
Tung T.
Attorney, Agent or Firm:
Biebel, French & Nauman
Claims:
1. The ornamental design for a self-propelled trenching machine, substantiallyas shown and described.

Description:

FIG. 1 is a perspective view from the left front side of the self-propelled trenching machine showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a front view thereof; and

FIG. 6 is a rear view thereof.