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:
Jun. 30, 1987
Filed:
Aug. 28, 1984
Applicant:
Inventors:
Pauli Rajakallio, Tampere, FI;
HaLeo, Tampere, FI;
Assignee:
Oy Tampella AB, Tampere, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21C / ;
U.S. Cl.
CPC ...
173 36 ; 173 32 ; 173 34 ;
Abstract
A supporting arrangement for a feed device for a drilling machine of a rock drilling unit (2) comprising a feed device (3) for a drilling machine (4), a cradle (5) supporting the feed device longitudinally displaceably and a supporting device (10) which is extendable in parallel with the feed device for supporting the feed device against a tunnel wall. The supporting device is supported by the cradle so that it remains stationary with respect to the cradle when the feed device is displaced.
Rajakallio, Pauli. (1987). Supporting arrangement for a feed device for a rock drilling machine (U.S. Patent No. 4676322). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4676322
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