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Class 172/23 - DRIVEN FROM OR GUIDED BY STATIONARY OBJECT, OR ANCHORED


Subclass of Class 172 - Earth working
Definition: Apparatus comprising an earth working means adapted (1)
No. of patents: 8
Last issue date: 01/07/1992


NumberTitleIssue Date
5078214Method of amelioration of soil for tree planting
A method of preparing land for tree planting includes the step of ameliorating small zones of the land required for planting. These zones may be between the rows of stumps after tree felling and are of the order of one meter square and 25 to 75 cms deep. ...
01/07/1992
4944353Agricultural machine
An agricultural machine comprises a self-propelled chassis (1) and an arrangement for displacement of the working member (9) over the field surface, comprising a hermetic chamber (3) with a port (4), a source (2) of a fluid agent pumped into the chamber (...
07/31/1990
4944140Guidance system for a self-propelled machine
An automatic guidance system for a lawn mower comprises four tension cables (10 to 13) each anchorged at a point (15) adjacent one of the corners of a quadrilateral area and each wound round a winch drum (16 to 19) on the mower, a motor (60) on the mower ...
07/31/1990
4936708Apparatus for directing forward movement of a rod
An apparatus for directing the forward movement of a rod as it is moved through a loose medium has the versatility either to direct or not direct such movement. The apparatus has a directing member that is disabled in a first position wherein movement of ...
06/26/1990
4756260Sub-surface sludge injector apparatus
The combination of a self-powered reel dolly and a traveling plow injector carriage joined together by a traveling hard hose supply line is disclosed. The plow injector carriage carries a multiple shank plow and a plurality of injector pipes which, when t...
07/12/1988
4389799Scrub crusher
A dual winch for mounting on a tractor comprises a pair of winch drums separately connected via a clutch to a common drive shaft. Each winch drum typically incorporates a planetary gear unit. The cables on the winches are connected to a roller preferably ...
06/28/1983
4339908Vegetation clearing devices
The invention relates to vegetation clearing devices and more particularly to a gravity roller means for use in vegetation clearing. The invention provides a vehicle for use in vegetation clearing which comprises a winch arrangement mounted on the vehicle...
07/20/1982
4161143Automatic steering mechanism
An automatic steering mechanism is provided for causing a large farm tractor or other prime mover to selectively follow a predetermined path such as a furrow previously formed in a field. It is contemplated that the prime mover is provided with a steering...
07/17/1979
 
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