Excavating – Snow or ice removing or grooming by portable device – Including specific hydraulic control system to position...
Patent
1980-09-02
1982-10-12
Eickholt, E. H.
Excavating
Snow or ice removing or grooming by portable device
Including specific hydraulic control system to position...
200 6A, E01H 504
Patent
active
043531776
ABSTRACT:
Control apparatus for a snowplow blade or the like, includes a control shaft movably mounted to a housing, so as to have first and second end portions extending respectively inwardly and outwardly of the housing. A control circuit is mounted in the housing and a plurality of momentary contact switches are electrically coupled with the control circuit and mounted in the housing for selective actuation by the control shaft end portion in the housing. A resilient member is in engagement with said control shaft end portion in the housing for resiliently returning the control shaft to a predetermined neutral position. The control circuit comprises solenoid control circuits for energizing a plurality of solenoids to effect movement of the snowplow blade. A first circuit portion is responsive to ones of the switches for energizing ones of the solenoids for respectively controlling the snowplow blade in left and right turning motions and in upward lifting motion. A second circuit portion is responsive to ones of the switches for energizing at least one of the solenoids for controlling downward motion of the snowplow blade. The second circuit portion also includes a timing circuit for effecting energization of the associated solenoids for a predetermined time period following actuation thereof and thereafter for de-energizing the associated solenoid.
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MTE, "Permanent Magnet D.C. Hydraulic Systems", brochure, 2 pages, 1978, MTE Hydraulics, Inc., Div. of Mechanical Tool & Eng. Co.
Monarch, "Wiring/Installation Instructions for the Monarch Dyna-Ramic" brochure, 6 pages, 5-1-73, Monarch Road Machinery Co.
Eickholt E. H.
Swenson Spreader Company
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