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:
Jul. 29, 1980
Filed:
Feb. 16, 1978
Boris V Sudnishnikov, Novosibirsk, SU;
Khaim B Tkach, Novosibirsk, SU;
Alexandr D Kostylev, Novosibirsk, SU;
Veniamin V Kamensky, Novosibirsk, SU;
Konstantin K Tupitsyn, Novosibirsk, SU;
Vladimir M Terin, Novosibirsk, SU;
Other;
Abstract
A percussive device operable in a forward mode for making a hole in soil and operable in a reverse mode to retract the device from the hole. The device is provided with control means that change the mode of operation alternatively under control of a valve that turns air pressure on and off in a supply or feed line to the device. When the air is turned off from the device the valve establishes connection to an aspirator for establishing a suction condition to the device that will reverse the mode so that upon turning on of air back to the device will make it operate in the changed-over mode.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile