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Class 60/474 - Valve or restriction controls gravity or spring return of output


Subclass of Class 60 - Power plants
Definition: Apparatus in which the pump moves the piston in one direction
No. of patents: 14
Last issue date: 08/21/2007


NumberTitleIssue Date
7258242Mobile crane boom having an autarchic hydraulic power unit mounted thereon
The present invention relates to a mobile crane boom having a self-sufficient energy supply arranged on it for supplying hydraulic energy to at least one hydraulic load arranged on the mobile crane boom. The supply of the hydraulic load arranged on the mobile crane ...
08/21/2007
7140631Automatic kick stand for two-wheeled vehicle
An automated side stand for a two wheeled vehicle. A side stand assembly comprises a rotatable strut and an actuator attachable to the frame of a vehicle having two wheels. The actuator operates to rotate the strut between an up position and a down position. In the ...
11/28/2006
6993905Oil hydraulic cylinder
An oil hydraulic cylinder configured to allow an object to be smoothly and continuously lifted without being clatteringly swayed and unnecessarily rotated by the oil hydraulic while supply of the oil hydraulic remains uninterrupted when an adjusting lever is manipul...
02/07/2006
6715282Actuator device, in particular for operating the stand of motorcycles, and automatically releasable hydraulic valve
A valve and a device for actuating the rotation of a stand (4) of a motorcycle (2) comprising an hydraulic actuator (1) operating an actuating member (7) between a first and a second position bringing the stand (4) from a rest posi...
04/06/2004
6679054Electro-hydraulic actuator of a motorcycle stand
An actuating device (1) for the rotation of a stand (4) of a vehicle, such as a motorcycle or scooter, between a standing position and a rest position, and allowing also the reverse maneuver in order to rotate the stand from the position of vehicle on the...
01/20/2004
6454033Electro-hydraulic vehicle with energy regeneration
A vehicle including a battery (61) powering an electrical motor (60), the electric motor (60) operating when the vehicle is driving at a nominal speed in order to drive, at a constant speed, a variable displacement hydraulic pump (4) which is connected to...
09/24/2002
5749224Extended range thruster system and method of determining thrust
An electrohydraulic actuator has a housing divided into pump and cylinder portions respectively containing a centrifugal impeller driven through a hub by an externally mounted motor, and a pushrod actuated by a piston and arranged to advance the piston an...
05/12/1998
5375418Controlled convertible top hydraulic lock
A vehicle convertible top is moved by hydraulic cylinders between extreme raised and lowered positions. The cylinder ends are connected to ports in a reversible hydraulic pump in one end of an elongated housing, which has a reservoir in the other end, sep...
12/27/1994
5291918Safety valve actuator assembly
An emergency shut-down system to close a gate valve in a pipeline and therefore terminate flow. The closing action is initiated when a pilot valve senses pressure in the pipeline outside predetermined limits. This reduces the signal pressure in the system...
03/08/1994
5251445Hand operated hydraulic pump having pressurized reservoir within piston
An airless hand held hydraulic pump unaffected by gravity continuously maintains pressure on the fluid in a dynamic reservoir chamber to enable pumping into a dynamic pressure chamber for actuating a forcing rod irrespective of the orientation of the pump...
10/12/1993
5107678Floating fluid-operated actuator
The piston of a reciprocating hydraulic actuator carries a pump which is driven by an electric motor and which supplies oil from the low pressure chamber of a cylinder to the high pressure chamber thereof in order to advance the piston. An exhaust valve i...
04/28/1992
5070900Safety valve actuator assembly
An emergency shut-down system to close a gate valve in a pipeline and therefore terminate flow. The closing action is initiated when a pilot valve senses pressure in the pipeline outside predetermined limits. This reduces the signal pressure in the system...
12/10/1991
5065664Control circuit for a cylinder allowing flow between an upper and a lower chamber
A hydraulic control circuit arrangement for a single-acting cylinder provided with bottom and rod chambers separated by a piston having a piston rod extending the rod chamber, the arrangement including a directional control valve for controlling a supply ...
11/19/1991
4642986Hydraulic servo motor
(a) Hydraulic servo motor comprising a jack (1, 14) intended to be connected by its rod (31, 32, 151) to a moving member to be displaced and accurately positioned, said jack being completely filled with liquid; (b) Servo m...
02/17/1987
 
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