The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 1976
Filed:
Nov. 22, 1974
Applicant:
Inventors:
Stig-Gunnar Lofgren, Jarved, S;
Fride Moberg, Ornskoldsvik, S;
Assignee:
Mo och Domsjo, Ornskoldsvik, S;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A01C / ;
U.S. Cl.
CPC ...
111-2 ; 111 89 ;
Abstract
A planting machine is provided having a pneumatic depth indicator on the digging tool and comprising at least one gas conduit for conveying a gas under superatmospheric pressure from one end to the other end thereof, the one end being connected to a gas supply source, and the other end being open to atmosphere and spaced a distance from the digging tool end equal to the depth of the hole dug by the tool for a plant, the other end being so arranged that the opening to atmosphere is plunged into blocking contact to the earth when the predetermined hole depth is reached, thereby halting flow of gas from the conduit.