Matches 51 - 100 out of 253 < 1 2 3 4 5 6 >


Match Document Document Title
5186095 Piston assembly and method  
A piston assembly employs a central velocity tube which provides an increase in speed of the initial downward stroke phase while requiring less power than conventional hydraulic cylinder...
5174191 Pneumatically actuatable linear drive for automatic spot welding machines  
A pneumatically actuatable linear drive for automatic spot welding machines includes a cylinder, a piston rod with segments and pistons and an intermediate bottom between the pistons for dividing...
5115720 Hydraulic valve bank  
An industrial truck has a hydraulic fluid supply and at least one double-acting hydraulic cylinder assembly for moving a movable element of the vehicle. The cylinder assembly includes a cylinder...
5094080 Double brake-booster and master cylinder assembly with relatively movable power pistons  
In the double brake-booster and master cylinder assembly, the booster comprises, in an outer casing 10, a fixed partition 11 defining, inside the casing 10, a front space A and a rear space B,...
5062268 Fluid actuator  
A hydraulic actuator is formed by a first element incorporating a plurality of different sized piston cavities by a first set of piston elements which cooperate with a second set of piston...
5058384 Digital actuator  
A hydraulic actuator is formed by an assembly including a first element, a cylinder, a body section and a chamber. The first element is provided with a first set of a plurality of different sized...
5048292 Dual pump traverse and feed system  
A single rod three chamber fluid motor is driven in a forward stroke which includes a rapid initial advance followed by a relatively short and slow feed stroke under high pressure. The rapid...
5044255 Brake regulator with second boost chamber  
The vacuum servomotor comprises a main casing (12) divided sealingly on the inside into first and second chambers (10, 20) by a flexible membrane (9) bearing on a rigid disk (7) integral with an...
5001964 Pressurized fluid mechanism with two cubic capacities and closed circuit applying same  
The present invention relates to a hydraulic motor capable of presenting two active cubic capacities of different values, as described in FR-A-2 481 755, and comprising in particular a shuttle...
4995302 Negative pressure booster equipment  
The negative pressure booster equipment according to the present invention is provided with a variable orifice, by which the area of the air passage in the pathways other than one pathway, of two...
4976187 Fast sweep power cylinder for refuse trucks  
Power fluid from a pump are provided through one power fluid branch conduit to an extend port for activating the smallest cylinder of a multi-stage packing cylinder and fluid is conducted through...
4970942 Device designed for the control of a gearbox synchronized by an electronic calculator  
A device designed to actuate the positive clutches of gearbox sliding gears following synchronization of the respective pairs of gears. A cylinder mechanism is provided on each sliding plate of...
4967644 Clutch control pneumatic boost device  
A pneumatic boost device includes a booster input including a manually actuatable upstream pusher and a downstream pusher positioned such that the movement of the upstream pusher towards the...
4936402 Hydrostatic steering device including a gerotor set  
An improved hydrostatic steering mechanism is disclosed having the operation valve for the steering mechanism located within the rotor of the metering and feedback operational gerotor set.
4899642 Pneumatic combined with hydraulic brake chamber  
The present invention provides a kind of pneumatic combined with hydraulic brake chamber, especially relating to a powerful hydraulic brake chamber which is highly stable, ready to provide...
4896594 Drawing installation for a press  
A drawing installation for a press which has to produce the holding force for the counter-holding during the drawing. The drawing ram displaces the sheet metal part and the sheet metal holder...
4861259 Mold clamping device  
A mold clamping device is disclosed. The device includes a clamping ram, whose front end is connected to a moveable board of an injection molding machine, slidably fitted in a clamping cylinder,...
4833971 Self-regulated hydraulic control system  
A self-regulating hydraulic control circuit for controlling the flow of fluid to and from the cylinder of a double-acting hydraulic motor employs two pumps, one of which supplies fluid at a...
4827830 Chassis towveyor cart  
A towveyor cart for use in hoisting an object and in particular an object having first and second interconnected portions from a first level to a fully raised level. The towveyor cart has control...
4823658 Punch presses  
An improved punch assembly (10) for a punch press comprises a main piston (13) driving a punching tool (11) and an auxiliary piston (17) which can be selectively enabled to cooperate with the main...
4807519 Piston machine with changeable displacement  
The invention relates to a piston machine comprising a plurality of pistons and changeable piston displacement for varying the torque and speed. The pistons are connected via control bores and...
4785715 Hydraulic control means for a sweeping roller held by two cylinders in a sweeping machine  
The sweeping roller of a sweeping machine is held on the ground in sweeping operation by two hydraulic cylinders in such a manner that the degree of wear is small. For this purpose in each...
4768841 Brake control device  
A brake booster which is capable of appropriately varying the amplifying ratio thereof according to information on a brake pedalling force obtained as an input of a brake system and information on...
4753136 Hydraulic control of transmission  
A fluid pressure actuator for a frictionally engaged unit of a vehicular transmission includes a first transmission and a second transmission coupled to the output side of the first transmission...
4742677 Controls for hydrostatic drive units  
A control for a hydrostatic unit is provided in which control mechanism is provided between the feed line of the hydrostatic unit and a servo piston controlling the drive unit whereby the pressure...
4739694 Apparatus for performing automatic changeover of winding of a thread in a thread winding machine and including a piston and cylinder unit for a thread winding machine  
The thread winding machine includes a piston and cylinder unit, comprising a cylinder housing with first and second chambers and a dividing structure between said first and second chambers. A...
4736588 Hydraulic brake booster with coaxial axially spaced booster pistons  
A brake booster has a first booster cylinder and a booster piston disposed in it for displacing a rod-like master cylinder piston of a master cylinder which supplies at least one brake circuit (I,...
4727781 Supercharged power tongs  
A supercharged power tongs for making up or breaking apart drill tools used in oil or geologic drilling engineering is designed to take the place of B-type tongs. Supercharger and assist fluid...
4713984 Drive stage control mechanism for automatic transmission  
In an automatic transmission having a four-element two-stage torque converter and a planetary gear transmission which carries out a change-over operation of drive stage of plural planetary gear...
4700611 Pneumatic cylinder motor with end-of-travel cushioning mechanism  
A cushioning mechanism in a pneumatic cylinder utilizing a supplied air pressure, and a method of cushioning a piston in the pneumatic cylinder. Cushioning chambers are provided at opposite ends...
4667473 Low compensating accumulator and bungee  
In an actuator (102), a piston head portion (108) reciprocates in a large diameter section of a cylinder casing (102), dividing such section into first and second variable volume chambers (112,...
4649802 Control valve  
A control valve (81) for a vacuum brake booster (10) having a sleeve member (96) for positioning a poppet valve (92) in a bore (74) of a hub (28) and defining the limits for a continuous flow path...
4631980 Hydraulic circuit construction for a tractor having a hydraulic stepless change speed apparatus  
A hydraulic circuit construction for a tractor having a hydraulic stepless change speed apparatus wherein pressure oil is supplied to the charge oil line regardless of whether the main clutch is...
4630442 Apparatus and method for pre-filling a hydraulic motor  
A reservoir for holding pre-fill hydraulic fluid is connected at its bottom to the power input side of a hydraulic motor. A stand pipe within the reservoir is connected to a hydraulic fluid drain...
4610483 Vehicle brake system  
In a vehicle brake system including a pneumatic force multiplier apparatus in which a power piston moves by virtue of a pressure difference between atmospheric and negative pressure, a manual...
4602481 Fluid actuator for binary selection of output force  
The actuator (12) comprises three main parts, an outer casing (20), a movable piston (28) and a fixed piston (36). A stepped outer portion (50, 52, 54) of the movable piston (28) cooperates with a...
4598629 Compact assisted steering mechanism  
Two pistons (5, 8) are mounted in the same casing (1) so as to slide in a sealed manner, the two pistons (5, 8) being firmly fixed to one another and having corresponding actuating chambers (21,...
4586591 Pressure-fluid-operable vehicle brake system  
A pressure-fluid-operable vehicle brake system is proposed, which is fed by an auxiliary energy supply system (3) and which comprises a master cylinder device (1), in which a booster piston (40)...
4579044 Two-speed shift valve  
A two-speed, pilot-operated selector valve which directs hydraulic fluid to two motor elements with a common output shaft to obtain a high-torque, low-speed mode, or to one motor element, while...
4577484 Hydraulic safety device for a mechanism for closing up the rolls of a rolling mill  
Hydraulic safety device for the mechanism for closing up the rolls of a rolling mill, comprising an hydraulic safety valve (20) which is accommodated directly inside the jack (1) for closing up...
4571943 Tandem brake booster with hydraulic mechanism for rear diaphragm force reversal  
A vacuum brake booster includes a pair of diaphragms which move in opposite directions during a brake application. One of the diaphragms is connected to a valve assembly to generate a first force...
4565116 Hydraulic speed controls for die closing unit of injection molding machine  
A hydraulic actuator assembly for a push-type die closing unit of an injection molding machine which has a central, internally bypassable power piston, lateral cylinders for rapid opening travel...
4562902 Brake system  
A brake system for an off-highway vehicle which includes a fluid pressure actuated multi-disc brake and a fluid pressure control system. Engagement of the multi-disc brake is effected by a fluid...
4557181 Brake cylinder/air reservoir device  
A combined brake cylinder/air reservoir device in which a relatively small, tubular-shaped piston in a positioning chamber is connected to a larger power piston having an application chamber on...
4538505 Extracting screw apparatus  
An extracting screw apparatus comprises a hydraulic control which operates during starting of the extracting screw after a period of nonuse. The hydraulic control comprises a double-acting...
4531451 Multiple chamber coaxial hydraulic jack and control system therefor  
An hydraulic jack having more than two chambers is disclosed and is intended for use in a system of jacks, the displacement of which is to be synchronized. Each jack has a cylindrical center...
4531548 Apparatus to vary the force exerted on an actuator mechanism  
A force transmitting fluid actuator for use with a control device wherein an actuator member, movable within an actuator housing, actuates the control device due to the urging force of a plurality...
4527461 Rotating servomotor apparatus  
A rotating servomotor apparatus for use in rotating guide vanes in a hydraulic machine, wherein for the purpose of suppressing occurrence of flow-induced vibrations, there is provided a bearing to...
4516474 Tandem diaphragm brake booster  
A tandem diaphragm brake booster includes a housing, first and second diaphragms disposed in said housing, a partition wall disposed between said first and second diaphragms within said housing...
4506867 Jacking apparatus having a fast repositioning stroke  
A jacking apparatus and method for effecting movement of loads. At least two double-acting hydraulic cylinders including a first and a second cylinder arranged in tandem provide increased force...

Matches 51 - 100 out of 253 < 1 2 3 4 5 6 >