Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7415909 | Support structure for pedal of vehicle A support structure for a pedal of a vehicle pivotablly supports a pedal assembly (34) to a pedal bracket (38) mounted on a vehicle dash panel (6). The support structure for a pedal of a vehicle includes a reinforce member (14) for the ve... | 08/26/2008 |
| 7360360 | Vehicle braking device A vehicle braking device includes a stroke simulator provided between a control piston of a fluid pressure booster and a brake operation member, wherein the control piston has an inner peripheral surface partially including a tapered surface with a decreasing diamet... | 04/22/2008 |
| 7293413 | Vehicle braking device There is provided a vehicle braking device in which a front outer periphery of a backup piston that can directly press a master piston from behind when output fluid pressure from a fluid pressure generation source is reduced is fluid-tightly and slidably fitted to a... | 11/13/2007 |
| 7267040 | Booster with reduced dead travel and a braking system comprising such a booster A pneumatic brake booster with short actuating travel, comprising a skirt and a pneumatic piston that are rigidly connected and slideably mounted in a sealed casing to delimit a low-pressure chamber and a variable-pressure chamber and a three-way valve arrangement t... | 09/11/2007 |
| 7159953 | Brake servo unit comprising a reaction disc device This invention mainly relates to a reaction-disk device, to its manufacturing process and to a pneumatic servomotor for an assisted braking, including such reaction device. A reaction device according to the present invention comprises a receiving cavity, fit... | 01/09/2007 |
| 7104058 | Vehicle braking system In a vehicle braking system, a backup piston pushes a master piston directly from behind when hydraulic pressure of a boosted hydraulic pressure chamber decreases. The backup piston has a piston body which is slidably fitted in a casing, and a pusher which is slidab... | 09/12/2006 |
| 7083240 | Vehicle braking system A vehicle braking system includes: a hydraulic booster which applies output hydraulic pressure of a hydraulic power source to a boosted hydraulic pressure chamber after regulating the output hydraulic pressure as a control piston operates to balance reaction force g... | 08/01/2006 |
| 7043911 | Vehicle braking system master cylinder A master cylinder suitable for a vehicle braking system has an unusual capability to supply quantities of fluid and fluid pressures at its output in differentiated manner in dependence on the braking stage, preventing long transitory stages between an approach stage... | 05/16/2006 |
| 6966615 | Hydraulic braking pressure generating apparatus for a vehicle and a hydraulic brake device for a vehicle including a hydraulic braking pressure generating apparatus A hydraulic braking pressure generating apparatus for a vehicle includes a hydraulic pressure generator for generating a predetermined hydraulic pressure irrespective of a braking operation of a brake operation member and for outputting the predetermined hydraulic p... | 11/22/2005 |
| 6955407 | Negative pressure type brake hydraulic pressure generating device A negative pressure type brake hydraulic pressure generating device is proposed in which the stroke on the operating side can be set independently of the stroke on the output side. A slide resistance imparting means is provided between the fixed shell and a piston h... | 10/18/2005 |
| 6655140 | Fluid pressure boosting device In a fluid pressure boosting device 1 of the present invention, a control valve 4 is composed of a supply valve 44 and a discharge valve 45, the supply valve 44 comprises an annular valve cone 46 of a poppet type and a first valve seat 7 and the discharge... | 12/02/2003 |
| 6561075 | Power booster with mechanical panic assist function A power booster for a brake system including a housing having an interior and a diaphragm separating the interior of the housing into at least two chambers. A power piston is coupled for movement with the diaphragm and includes an output member. A reactio... | 05/13/2003 |
| 6542793 | Pedal apparatus for vehicles and a vehicle equipped with the same There is provided a pedal apparatus for vehicles, which comprises a pedal reaction-force addition means 4 for adding a reaction force to a pedal 1 of a vehicle, a pedal force detection means 2 for detecting a force added to the pedal 1, a pedal reaction-f... | 04/01/2003 |
| 6477839 | Hydraulic brake for a vehicle A hydraulic brake device for a vehicle includes a master piston, an auxiliary piston having first and second pistons, and an assisting device for assisting actuation of the master piston through the auxiliary piston. The brake pressure increase gradient i... | 11/12/2002 |
| 6389812 | Hydraulic brake apparatus A hydraulic pressure brake apparatus which smoothly adds the assistance force of a hydraulic pressure booster to a master cylinder piston after the assistance limitation by a negative pressure booster includes a negative pressure booster that assists a ma... | 05/21/2002 |
| 6367254 | Master cylinder A master cylinder which includes a primary piston and a thrust piston disposed within a housing, and defines an intensifying chamber at a location rearward of the thrust piston. An input shaft has a front end which is disposed within the intensifying cham... | 04/09/2002 |
| 6233932 | Fully hydraulic brake power generator/master cylinder unit with improved brake pressure feedback A fully hydraulic brake power generator/master cylinder unit (10) for a vehicle brake system has a housing (12) with a bore (14) which is formed therein and in which a primary piston (16) is arranged sealingly and displaceably. Located in the bore (14) is... | 05/22/2001 |
| 6052994 | Hydraulic brake apparatus for a vehicle The present invention is directed to a hydraulic brake apparatus for applying braking force to each wheel of a vehicle in response to depression of a brake pedal. An auxiliary pressure source is provided for pressurizing the brake fluid in the reservoir t... | 04/25/2000 |
| 5941071 | Boosted braking device with hydraulic reaction and improved safety A boosted braking device for a motor vehicle having a master cylinder (200) and a pneumatic booster (100). The master cylinder (200) is equipped with a primary piston (30) which receives an actuating force to increase pressure in a primary hydraulic circu... | 08/24/1999 |
| 5927821 | Hydraulic automotive vehicle brake system A hydraulic automotive vehicle brake system with an actuating assembly that is attached to the splashboard of the automotive vehicle and is operable by the vehicle brake pedal. In order to reduce the possibility of risk to the driver during a collision (e... | 07/27/1999 |
| 5873296 | Booster apparatus of vacuum type A booster apparatus of a vacuum type for a brake device has a housing including therein a chamber, a diaphragm for dividing the chamber of the housing into a constant pressure chamber and a variable pressure chamber, an input shaft including a distal end,... | 02/23/1999 |
| 5634337 | Assembly of a pneumatic brake booster and of a master cylinder An assembly of a pneumatic brake booster (100) and a master cylinder (200) for a motor vehicle. The pneumatic brake booster (100) has a casing (20) fixed to the bulkhead (10) of the vehicle. The casing is divided in leaktight fashion by a movable wall str... | 06/03/1997 |
| 5572870 | Boosted brake device with concealed travel and guaranteed gain A brake device having a pneumatic brake booster and a master cylinder. The master cylinder operates in response to a combined actuation force derived from a boost force and an input force. The input force is applied to a control rod for opening a valve to... | 11/12/1996 |
| 5487271 | Brake-booster with hydraulic reaction and adjustable kick This brake-booster device comprises a pneumatic brake-booster (1) associated with a master cylinder (2). The booster comprises a movable pneumatic piston (5) bearing a valve (7) and functions according to a hydraulic reaction principle, the hydraulic pist... | 01/30/1996 |
| 5442917 | Force transmission device with flat support A pneumatic brake booster has a thrust rod (13) guided by a sleeve (16) supported by a hydraulic piston (14) of a master cylinder (2). The thrust rod has a thrust washer (15) fixedly attached, which bears against a flat bottom of a cup (12) housing a reac... | 08/22/1995 |
| 4819996 | Automotive vehicle braking device An automotive vehicle braking device comprises a hydraulic master cylinder (11) having at least one piston (21) for pressurization of the wheel cylinders connected thereto with hydraulic pressure and also having a vacuum brake force booster (12) inserted ... | 04/11/1989 |
| 4773223 | Master cylinder and oil-hydraulic booster assembly In the assembly of a master cylinder and an oil-hydraulic booster connected to the rear thereof, the master cylinder has an axial bore consisting of a forward, small-diameter bore section and a rearward, large-diameter bore section and the master cylinder... | 09/27/1988 |
| 4724674 | Hydraulic brake booster The hydraulic brake booster (12) includes a resilient member (96) disposed between an input member (94, 194, 294) and a pair of valve members (98, 101; 112) which control fluid pressure flow from an accumulator (14). When the input member (94, 194, 294) i... | 02/16/1988 |
| 4704867 | Hydraulic brake booster with cam and lever ratio changer The brake booster (12) includes a housing (30) with at least one piston (38) disposed in a bore (32) between a pressure chamber (42) and a work chamber (76). The piston (38) is disposed adjacent a valve housing (79) containing therein a valve assembly (80... | 11/10/1987 |
| 4697497 | Hydraulic amplifier valve assembly A hydraulic amplifier valve assembly having an input end (where, for example, a brake pedal force may be applied) and an ouput end includes a valve housing and an amplifier piston which is slidably received in the housing only along that end portion which... | 10/06/1987 |
| 4693083 | Vacuum brake force booster A vacuum brake force booster is provided wherein the pressure column above the immersing valve plunger of the dual valve contained in the piston chamber, in the applied position, generates a reaction force imparting to the vehicle drive the feeling of the... | 09/15/1987 |
| 4671066 | Hydraulic power booster A hydraulic power booster, for the actuation of a master cylinder in an automotive vehicle brake system, in which a booster piston and a brake valve are essentially arranged in parallel with the booster piston. In dependence on the actuation force applied... | 06/09/1987 |
| 4653382 | Pull-type pneumatic booster A pull-type pneumatic booster comprises an elongated plunger received in a body for sliding movement along an axis thereof. A movable member is slidably received in the body and defines a low and a high pressure chamber therein. The high pressure chamber ... | 03/31/1987 |
| 4653814 | Power brake booster for a hydraulic vehicle brake system A power brake booster including booster pressure acting upon a booster piston and controlled by a brake valve which is actuated by an actuating element supported in the booster housing is disclosed. A travel simulator is interposed between the actuating e... | 03/31/1987 |
| 4642990 | Master cylinder and oil-hydraulic booster assembly In the assembly of a master cylinder and an oil-hydraulic booster connected to the rear thereof, the master cylinder has an axial bore consisting of a forward, small-diameter bore section and a rearward, large-diameter bore section and the master cylinder... | 02/17/1987 |
| 4640097 | Brake booster A brake booster having a constant pressure chamber and a variable pressure chamber formed respectively at both front and rear sides of a power piston within a housing, characterized in that a hollow expansion body expansible axially of the power piston is... | 02/03/1987 |
| 4625516 | Brake booster A brake booster includes a housing with at least three bores to movably carry a pair of pistons and a valve assembly. A diaphragm is exposed to a fluid pressure differential to pull the pair of pistons and the valve assembly to a brake applied position wh... | 12/02/1986 |
| 4569201 | Brake actuation assembly and method of assembly A brake actuation assembly (10) and its method of assembly wherein a connecting pin (173) between a movable wall (101) and a torque tube (66) is retained by a keyway (141) in a plunger (140). The pin (173) moves in a slot (69) in the tube (66) in response... | 02/11/1986 |
| 4566275 | Hydraulic boosters for vehicle braking systems An hydraulic booster has a boost piston which works in a bore and is subjected to boost pressure in a boost chamber to actuate a master cylinder assembly, and a control valve assembly controls pressurization of the boost chamber in response to an input lo... | 01/28/1986 |
| 4562696 | Fluid pressure servomotor A fluid pressure servomotor for automotive vehicle wheel brake system including a housing having a movable wall therein for reciprocable movement, the movable wall dividing the housing into two compartments, one on each side of the movable wall. The two c... | 01/07/1986 |
