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. 19, 1984
Filed:
Aug. 07, 1981
Johann L Frohlich, Vienna, AT;
Josef Gamperl, Vienna, AT;
Peter Hanak, Vienna, AT;
Gerhard Wawra, Prottes, AT;
OMV Aktiengesellschaft, Vienna, AT;
Abstract
The invention relates to a swab hoist for use in conveying crude oil and natural gas having a cable drum and a driving motor for the cable drum. It is the object of the invention to provide a swab hoist of improved properties. This is achieved according to the invention by providing a hydraulic drive for the transmission of force from the driving motor to the cable drum. The hydraulic drive consists of a hydraulic pump driven by the driving motor, a hydraulic motor connected to the cable drum and a control means, in particular a pressure-reducing means, all connected to one another by means of pressure lines.