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:
Apr. 11, 2000
Filed:
Jun. 12, 1998
Applicant:
Inventor:
Frank Hofmann, Hamburg, DE;
Assignee:
Walter Hofmann GmbH, Rellingen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A01G / ;
U.S. Cl.
CPC ...
239172 ; 239 62 ; 239146 ; 239332 ; 417-5 ; 417533 ; 417539 ; 222278 ; 222614 ; 222621 ;
Abstract
A road marking machine comprising a spray gun and a combination of two displacement pumps for supplying the marking substance to the spray gun, wherein the combination is driven in proportion with the traveling speed and wherein the pumps, each after starting the positive displacement operation thereof, which starts during the supply operation of the corresponding other displacement pump, pre-compress the marking substance, then stops and continues the pressure stroke when the other displacement pump ends its supply, with hydraulic cylinders for driving the displacement pumps.