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:
Aug. 02, 1988
Filed:
Oct. 06, 1986
Kobashi Kogyo Co., Ltd., Okayama, JP;
Fuji Robin Kabushiki Kaisha, Tokyo, JP;
Abstract
A cultivator has a blade downwardly projected from a frame, an injector provided at a lower portion of the blade, a compressor mounted on the frame and an air tank for storing air compressed by the compressor. An unloading valve provided in a hydraulic circuit for supplying compressed air in the air tank to the injector. The unloading valve is arranged to be opened when the pressure in the air tank is higher than a predetermined value. A master valve is provided in the circuit means, for passing the compressed air to the injector. A mechanical valve is provided to be opened when the depth of the injector reaches a predetermined value, so that the compressed air is supplied to the master valve to open it, whereby air is injected from the injector when the pressure in the air tank is higher than the predetermined value at the predetermined position of the injector.