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. 28, 1978
Filed:
Aug. 20, 1976
Viktor Senderovich Lifshits, Moscow, SU;
Alexandr Alexandrovich Sukhanov, Elektrostal Moskovskoi oblasti, SU;
Nikolai Makarovich Dergachev, Elektrostal Moskovskoi oblasti, SU;
Arkady Alexeevich Pevnev, Elektrostal Moskovskoi oblasti, SU;
Vladimir Nikitich Baranov, Elektrostal Moskovskoi oblasti, SU;
Leonid Pavlovich Shklyanov, Elektrostal Moskovskoi oblasti, SU;
Other;
Abstract
A welding apparatus employing a self-contained pumping accumulator plant hydraulically associated with a hydraulic ram of a moving clamp transfer gear for gripping pipes being welded. The apparatus employs a device for decreasing the pressure in the hydraulic ram and in a pilot valve during flashing and for increasing pressure during upsetting. The apparatus also employs a a low-pressure high-capacity pump with a filter, a relief valve, a nonreturn valve and an unloading slide valve, two high-pressure low-capacity pumps and a device for cutting the pumps and the unloading slide valve in and out. The pumping accumulator plant and the high-pressure pumps communicate with a main oil plant; a hydraulic control of the slide valves of the clamp hydraulic drives is connected to the pumping accumulator plant. The pilot valve is controlled by a welding process program control actuator.