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:
Feb. 14, 1978
Filed:
May. 18, 1977
Applicant:
Inventor:
Josef Welzel, Wuppertal, DT;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D / ;
U.S. Cl.
CPC ...
61 4 / ; 61 63 ; 248357 ;
Abstract
A multiple valve control device is suspended by means of a chain or other flexible supporting means such as a cable from a rod or bar carried on a walking mine-roof support frame, the chain or other flexible supporting means being movable with and/or along the rod or bar and being adjustably hooked or otherwise releasably fastened in any one of a line of recesses in a balance beam secured to the control device.