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. 20, 1991
Filed:
Jun. 22, 1990
Eiji Maeba, Hiroshima, JP;
Kabushiki Kaisha Kobe Seiko Sho, Kobe, JP;
Abstract
A pneumatic circuit for a wheel mounted shovel wherein an air passage which extends through a swivel joint of the wheel mounted shovel is communicated commonly with a parking brake device and a suspension locking device of the wheel mounted shovel. The pneumatic circuit comprises a solenoid operated control valve communicated with a pressure source by way of a first air passage. The control valve is communicated with a working/service brake device by way of a second air passage. A third air passage is also connected to the control valve and is branched at a location on the downstream side of a swivel joint of the wheel mounted shovel into fourth and fifth air passages connected to the parking brake device and suspension locking device, respectively. An electric circuit is connected to the pneumatic circuit and includes a manually operable change-over switch for controlling the control valve to selectively connecting the first air passage to either one or neither one of the second and third air passages.