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Class 172/294 - Sequentially operated servo-motors


Subclass of Class 172 - Earth working
Definition: Apparatus in which the actuating means comprises a plurality
No. of patents: 3
Last issue date: 02/19/1991


NumberTitleIssue Date
4993499Wing packer
A wing packer has a middle frame section and two wing frame sections to which rollers are attached. The packer can be converted to a transport position by a hydraulic system which lifts the middle section and pivots the wing sections upward. The rollers a...
02/19/1991
4626032Rock ditcher
Apparatus for excavating hard soils comprising support means, an endless chain capable of movement relative to said support means, drive means for moving said endless chain, means integral with said endless chain operable to contact said hard soils, and m...
12/02/1986
4320589Snowplow apparatus
An improved snowplow apparatus provided with articulated quadrilateral means permitting vertical movement of a snow clearing blade which is kept in a lowered position by a compressed gas accumulator communicating with one or two hydraulic cylinders connec...
03/23/1982
 
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