U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 5421089

Fork With Timer

A fork with timer for providing a cue to a user after an elapsed period of time for indicating that another bite of food using the fork may be taken.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 60/555 - Master movement of master produces a pressure that controls the power fluid


Subclass of Class 60 - Power plants
Definition: Apparatus including a manual actuator that moves either
No. of patents: 37
Last issue date: 01/29/2008


NumberTitleIssue Date
7322657Stroke simulator
A second piston includes a first protruding portion that protrudes toward a first piston and a second protruding portion that protrudes toward a stopper. By changing a height of the first protruding portion and a height of the second protruding portion it is possibl...
01/29/2008
7219966Brake pedal feel simulator
A brake pedal feel simulator is provided which eliminates the simulation force during emergency, non-assisted and failure conditions. The brake pedal feel simulator generally comprises a spring, a spring seat and a spring stop. The spring is operatively connected to...
05/22/2007
7194946Pneumatic servomotor for power-assisted braking, the servomotor having a crimped diaphragm
A pneumatic servomotor (12) for power-assisted braking for a motor vehicle, which servomotor is of the type having a substantially cylindrical rigid casing (16) inside which a moving transverse partition (18) is movably mounted that has a periph...
03/27/2007
6732518Hydraulic brake booster
A hydraulic brake booster for use in a brake system having a housing with a power piston located in a first bore and a control valve located in a second bore. An input member is connected to the power piston and linked to the control valve by a lever arrangement. Th...
05/11/2004
6668552Hydraulic brake booster
A hydraulic brake booster has a housing with a stepped bore for retaining a cylindrical piston and a control bore for retaining a control valve. The cylindrical piston defines, with the stepped bore, an output chamber, a relief chamber and a power chamber...
12/30/2003
6418716Hydraulic brake booster
In a proportional booster valve V, a primary reaction piston 37 and a secondary reaction piston 38 are provided between a control piston 23 which faces at one end thereof toward a control pressure chamber 25 into which hydraulic pressure outputted from a ...
07/16/2002
6223533Pressurized fluid device
A primary pipe system includes a master cylinder with corresponding pressure sensor that produces a primary electrical signal. A secondary pipe system includes a working cylinder with a pressure sensor that produces a secondary electrical signal. The seco...
05/01/2001
5337564Force or pressure augmenting device
A clutch-servo for vehicles which constitutes a working device arranged for fluid connection with a master cylinder to be operated by the vehicle's driver. The servo comprises a working cylinder unit (50) with a piston (5) arranged in a working cylinder (...
08/16/1994
5330259Electrohydraulic braking system with remote booster
A brake system (10) comprising: a master cylinder (20) including a primary (24) and a secondary (26) chamber and a reservoir (26); an accumulator (40), a pump (42) having first inlet port connected to a reservoir (26) of the master cylinder (20) and the s...
07/19/1994
5186003Integrated pressure amplification and modulation system for a hydraulic circuit
The invention relates to an integrated pressure amplification and modulation system for a hydraulic brake circuit, comprising at least one master cylinder (10), a hydraulic motor, a source of fluid under high pressure (48) and a reservoir of fluid under l...
02/16/1993
5142865Hydraulic booster
There is disclosed an automotive hydraulic brake booster in which a driver feels a brake pedal moving smoothly as he or she pushes down on the brake pedal. The booster includes a housing connected with a master cylinder, an input rod, a booster chamber fo...
09/01/1992
5065573Hydraulic power booster including backup actuator in addition to lever device, for booster control valve
A hydraulic power booster having a lever device disposed in operative association with a reaction piston, a power piston and a valve spool, for moving the valve spool in one of opposite axial directions thereof for applying a pressure of a pressure source...
11/19/1991
5061016Brake fluid pressure control apparatus
Disclosed is a brake fluid pressure control apparatus in which an anti-lock control mechanism is connected to a hydraulic booster. A large-diameter piston is combined with a small-diameter piston so that the pressurization effected by the master cylinder ...
10/29/1991
5046314Control device of a brake booster, applying additional force when a pressure difference between a front and rear booster chamber exceeds a pre-determined threshold
In order to increase the efficiency of a booster (10), the rear chamber (18) of which contains an auxiliary drive member (28) having a pressure chamber (30) connected to a pressure source (34) via a control device (36), the latter comprises a normally clo...
09/10/1991
5038564Pulsator-operated valving with reaction chamber accumulator for hydraulic booster system
A fluid pressure booster device includes a booster body, a control piston in the booster body for forward and rearward movements to define a boosting chamber between the control piston and a rear surface of a master piston of a master cylinder, a valve pi...
08/13/1991
4902075Braking apparatus for vehicle
A braking apparatus for a vehicle has a booster for receiving, as a pilot pressure, a pressure of a master cylinder and for regulating a pressure from an auxiliary pressure source to a level predetermined times the pilot pressure. The booster is provided ...
02/20/1990
4884403Modular brake actuator
A modular brake actuator useful in automotove vehicles includes a mounting base adapted to fit into a complementary opening in and form part of the fire wall between the engine compartment and the driver's cockpit. On one side of the mounting base there a...
12/05/1989
4874207Hydraulic braking system for an automotive vehicle
A hydraulic braking system for an automotive vehicle having a power source for generating a hydraulic power pressure, a reservoir, a master cylinder, a regulator and a plurality of wheel brake cylinders for braking respective road wheels, which are divide...
10/17/1989
4787685Slip-controlled brake device for automotive vehicles including vacuum power generator assembly used both as brake power booster and as modulator
A brake power-controlled brake device for automotive vehicles is provided with a hydraulic master cylinder (11) which is, via a pneumatically actuated pressure modulator (12), connected to at least one wheel cylinder brake circuit I. The pressure modulato...
11/29/1988
4779422Master-cylinder-actuated plunger for hydraulic brake booster valve
A brake system wherein an input from an operator operates a first master cylinder (12) produces first and second hydraulic fluid pressures. Flexible conduit (22 and 24) carries the first and second hydraulic fluid pressures to an actuator (26) for a hydra...
10/25/1988
4732001Hydraulic booster with boost-pressure responsive valve
A braking pressure generator (1,21) for a vehicular hydraulic brake system, wherein a booster piston (15) which is slidable by hydraulic pressure is displaceable in the actuating direction. The booster piston (15) is arranged as a stepped piston with a sm...
03/22/1988
4732002Servo-assisted master cylinder assemblies
A servo-assisted master cylinder assembly for a vehicle hydraulic braking system has a tandem master cylinder with primary and secondary pistons operative to pressurise primary and secondary pressure spaces for primary and secondary brake circuits. A serv...
03/22/1988
4706545Brake valve infinitely variable pressure intensification
In a brake valve of the type in which a given ratio is maintained between a master pressure developed by a brake pedal and an actual brake pressure, an arrangement is provided for continuous, rather than stepwise, adjustment of this ratio. The brake valve...
11/17/1987
4660897Brake system with brake booster
A brake system having a master cylinder for generating brake pressures in at least one closed brake circuit (I, II) and having an associated brake booster including a booster cylinder, a displaceable booster piston having a piston rod oriented into the ma...
04/28/1987
4622814Hydraulic assistance device
Hydraulic assistance device of the mixed hydrodynamic/hydrostatic type incorporating a body (10) in which a first piston (18) is slideably mounted and moveable between a first position allowing the communication of a first chamber (53), joined to a brakin...
11/18/1986
4494377Brake booster operated also by solenoid
A brake booster is operated both by braking actuated by a brake pedal and by a solenoid. A moving core of the solenoid and a relay valve piston of the brake booster are linked by a balance lever, and the moving core of the solenoid has a much larger mobil...
01/22/1985
4463562Booster assisted hydraulic master cylinders for vehicle braking systems
In a master cylinder assembly the pressure spaces in advance of pedal-operated pistons of two separate master cylinders are interconnected by a transfer passage, and each master cylinder incorporates a boost chamber to which hydraulic fluid from a pressur...
08/07/1984
4378676Booster for a hydraulic clutch system
An air/hydraulic servomotor unit for providing power assistance for a clutch hydraulic operating system and comprising a compressed air cylinder, a hydraulic slave cylinder, a load proportioning means that determines what ratio of the unit output is deriv...
04/05/1983
4362019Motor vehicle hydraulic system
A motor vehicle provided with servo-assisted controls for the brakes and steering, has an hydraulic system of the type comprising a volumetric pump the input of which is connected to a reservoir, and first and second distributor devices the first of which...
12/07/1982
4241583Fluid-pressure operated servo-motor assemblies for vehicle braking systems
In a servo-motor assembly for a vehicle braking system a valve controlling the servo pressure is operated by an operating assembly including a rotary valve actuator positioned between a pedal-operated input member and an abutment member. The valve actuato...
12/30/1980
4223533Device for the power-assisted control of a hydraulic transmitter
A device for the power-assisted control of a hydraulic transmitter is disclosed which includes a transmitter cylinder having a first and second bore provided therein, a main piston with a bore hole, disposed in the cylinder, valve means disposed in the bo...
09/23/1980
4182427Control mechanism for an integrated brake and steering system
A control mechanism through which pressurized fluid from a source is communicated into a brake system and a steering system in response to independent operator brake and steering signals. The control mechanism has a housing with a first bore and a second ...
01/08/1980
4123908Hydraulic servo assisted braking system
A servo-assisted hydrodynamic braking system of the type in which brake pedal pressure is used to control a modulating valve which restricts an output line of a pump thereby increasing the pressure in the output line which is connected to the master cylin...
11/07/1978
4117681Tandem master cylinder with integral proportioning valve
A tandem brake master cylinder has a proportioning valve between two pressure regions therein. The pressure in a second pressure region changes by a proportion of the change in a first pressure region at least over a part of the pressure range of the firs...
10/03/1978
4114376Servo-assisted hydraulic braking system
Servo-assisted hydraulic braking system of the type in which brake pedal pressure is reinforced by a pressure dependent thereon and fed to a master cylinder driving piston by a distributor device which is fed with fluid under pressure from a pressure sour...
09/19/1978
4106818Braking system for vehicle
A powered assist braking system having a pressurized fluid source which also supplies fluid to the steering system of a vehicle is disclosed herein. The braking system includes left and right-hand brake actuators that cooperate with a power brake valve an...
08/15/1978
4072011Hydraulic brake booster
A brake booster for use in a braking system having a control valve which is responsive to a hydraulic output force created by manually moving a piston in a bore of a master cylinder. The hydraulic output force actuates the control valve which proportional...
02/07/1978
 
Sign InRegister
Username  
Password   
forgot password?