Bizarre Patents
An electrified table cloth for preventing crawling insects from gaining access to the consumer's food or drink.
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.
| Number | Title | Issue Date |
| 7114599 | Protective sleeve A protective sleeve made of an elastic material for a piston-cylinder unit with a piston disposed in a cylinder bore in an axially displaceable manner. The protective sleeve is provided with annular end segments that can be supported on the outer piston wall on one ... | 10/03/2006 |
| 6276500 | Brake wheel cylinders A drum brake backplate assembly including a wheel cylinder (30) having a tubular body (31) having an axially extending bore (32) within which two brake shoe operating pistons (33) are in sealed sliding contact to define a working chamber (48) therebetween... | 08/21/2001 |
| 5713437 | Brake cylinder having efficient air bleeding A device and method to improve the bleeding of air from a brake cylinder usable in a drum brake. A first cylinder cavity 3 and a second cylinder cavity 4 are bored in the upper and lower sections respectively of the cylinder body 2, and a first piston 31 ... | 02/03/1998 |
| 5531298 | Brake actuator A drum-type brake actuator provides increased force transmission efficiency and assembly simplicity. An anchor carries two pistons which are moved to apply a brake shoe by the cooperative operation of a lever and strut arrangement. The utilization of thre... | 07/02/1996 |
| 5236251 | Vehicle braking systems A vehicle braking system has a master cylinder, a first brake associated with a front wheel of the vehicle and a second brake (11) associated with a rear wheel of the vehicle, the master cylinder being connected to the first and second brakes in a common ... | 08/17/1993 |
| 5219052 | Wheel cylinder boot with annular rings The present invention provides a vehicle wheel cylinder for a drum type brake. The sealing boot which seals the wheel cylinder frame and piston is provided in a preferred embodiment with annular rings which help protect the integrity of the sealed relatio... | 06/15/1993 |
| 5080202 | Wheel cylinder The invention relates to a wheel cylinder for a drum brake, comprising a body (2) provided with a longitudinal bore, two pistons (4,6) sliding in opposite directions outwards in the bore under the action of a pressurized fluid introduced between the pisto... | 01/14/1992 |
| 4986394 | Brake actuator A brake actuator has a body containing a pair of brake-applying members which may be actuated hydraulically to separate the friction elements of a brake into engagement with a rotatable braking surface. The members are interconnected by a mechanism in the... | 01/22/1991 |
| 4809588 | Hydraulic piston and cylinder assemblies A piston and cylinder assembly for a vehicle hydraulic system has a retaining device comprising an insert acting between a piston and the cylinder bore in which it works, the insert having a releasable frictional engagement in the bore and acting as an ab... | 03/07/1989 |
| 4781276 | Hydraulically actuated wheel brake with a built-in pressure control device A hydraulically actuated wheel brake with a built-in control device comprising a brake piston including two pressure surfaces each of which defines a different one of two working chambers. The pressure fluid inlet is connected directly to one of the two w... | 11/01/1988 |
| 4742897 | Wheel cylinder with self-contained auto-adjuster A self adjusting wheel cylinder for a drum brake including a brake drum and a brake shoe for exerting braking pressure on the drum with a shoe gap formed therebetween comprising a cylinder including an opening therein, hydraulic piston slidably mounted in... | 05/10/1988 |
| 4664232 | Brake device for robot arm A brake device for use in an arm of a robot or manipulator cmprises a brake drum, a lever pivotally supported at its intermediate portion, a brake shoe provided on the lever between its pivotally supported point and its one end, a pneumatic actuator axial... | 05/12/1987 |
| 4637499 | Expander mechanism for an internal shoe drum brake An expanding mechanism for an interior shoe drum brake, such as a simplex "expander-wedge" type brake, comprises a cylinder housing affixed to a brake support, coaxially mounted pressure pistons slidable in the housing, expander members adjoining the resp... | 01/20/1987 |
| 4553471 | Wheel cylinder assembly with proportioner A wheel cylinder assembly has telescoping brake actuating pistons with a brake pressure proportioner in the larger actuating piston to proportion brake actuating pressure.... | 11/19/1985 |
| 4544049 | Wheel cylinder assembly and seal arrangement therein A drum brake assembly having a wheel cylinder mounted on arms of a center guide backing plate by means of notches receiving the arms. The cylinder has pistons with low drag O-ring seals in grooves configured to provide seal forces which are aided by brake... | 10/01/1985 |
| 4537293 | Hydraulic cylinder assemblies A drum brake hydraulic wheel cylinder assembly comprises a pair of piston assemblies and an abutment member. The piston assemblies are of the kind comprising an adjustable variable length tappet assembly having interengaged screw-threaded components. To e... | 08/27/1985 |
| 4535875 | Actuator for an internal shoe drum brake An actuator for a shoe drum brake has a body containing a tappet engaging one of a pair of brake shoes, and a split tappet of which the outermost piston engages the other brake shoe. A mechanical wedge actuator acts between the tappets for emergency and p... | 08/20/1985 |
| 4519482 | Wedge actuated drum brake assembly A wedge actuated drum brake assembly uses a wedge-shaped actuating rod and a roller cage slidably mounted thereon to transmit actuating forces from a fluid pressure actuator to a pair of friction elements. The actuating rod and roller cage are provided wi... | 05/28/1985 |
| 4503954 | Drum brake with controlled torque and torque control valve for such a brake The brake comprises a torque control valve comprising a main piston which cooperates via a bearing piece with a shoe of which the bearing force is representative of the torque supplied by the brake during operation of the brake motor. The main piston cont... | 03/12/1985 |
| 4449757 | Hydraulic actuator for a vehicle internal shoe-drum brake An hydraulic actuator comprises a first piston and a second piston both working in a bore in a housing and the actuator incorporates a pressure proportioning valve. The valve comprises a valve head for engagement with a seating, first and second stems pro... | 05/22/1984 |
| 4416356 | Hydraulic wheel cylinder assemblies and drum brakes incorporating same A hydraulic wheel cylinder assembly is particularly for use in a drum brake of the kind in which the wheel cylinder assembly is interposed between one pair or adjacent ends of a pair of brake shoes and a mechanical expander and fixed abutment is interpose... | 11/22/1983 |
| 4415209 | An integral wheel brake cylinder and pressure regulating valve A brake pressure regulating valve inserted inside the pressure chamber of a wheel brake cylinder of a vehicle comprises a differential or stepped piston having its smaller diameter section slidably supported in a bore of a wheel brake cylinder piston and ... | 11/15/1983 |
| 4374554 | Duo-servo drum brake A drum brake (10) includes a light-weight backing plate (12) which carries a pair of brake shoes (44, 46). The backing plate comprises a pair of stamped plates (18,20) having a plurality of radially extending arms (22-28) which cooperate to guide the brak... | 02/22/1983 |
| 4369863 | Internal shoe drum brakes for vehicles An internal shoe-drum brake is disclosed in which a pair of arcuate shoes can be applied to a rotatable drum by an hydraulic actuation system for normal service braking when the brake acts as a brake of the "two-leading" shoe type and a mechanical actuati... | 01/25/1983 |
| 4363387 | Wheel cylinder and torque plate construction A wheel cylinder and torque plate construction is provided for a drum brake. The wheel cylinder comprises a molded plastic cylindrical member in a steel shell. The steel shell can be part of a torque plate which can be stamped in two parts which are subst... | 12/14/1982 |
| 4353439 | Drum brake with combined adjuster and wheel cylinder A drum brake assembly includes a wheel cylinder (36) and extendible assembly (60) disposed between adjoining ends of a pair of brake shoes. The wheel cylinder includes a pair of pistons (40,42) which are in abutting relation with each other and with the e... | 10/12/1982 |
| 4286504 | Drum brake actuating device A wheel cylinder comprises a bore closed by two pistons which define a pressure chamber therebetween. The pressure chamber is divided into two compartments by a partition member placed in the bore and which comprises a passage communicating the two compar... | 09/01/1981 |
| 4227594 | Backing plate-wheel cylinder retaining clip A brake assembly includes a backing plate, a pair of brake shoes slidably mounted on the backing plate, and a wheel cylinder supported on the backing plate between contiguous ends of the shoes. A retaining clip attaches the wheel cylinder to the backing p... | 10/14/1980 |
| 4203508 | Wheel cylinder attachment A drum brake includes a wheel cylinder which cooperates with a pair of brake shoes to urge the latter to a braking position. In order to attach the wheel cylinder to a backing plate, a flange is disposed in abutment with the backplate and the wheel cylind... | 05/20/1980 |
| 4182439 | Torque member for a drum brake A drum brake assembly includes a torque member which supports a hydraulic actuator. The hydraulic actuator is engageable with a pair of brake shoes and is operable to move the pair of brake shoes into a braking position. The torque member comprises a cent... | 01/08/1980 |
| 4174026 | Dash pot for a hydraulic actuator for a drum brake A drum brake assembly provides a pair of brake shoes which are movable by a hydraulic actuator to a braking position. The hydraulic actuator is carried by a backing plate and the pair of brake shoes is movable relative to the backing plate. A piston is sl... | 11/13/1979 |
| 4150736 | Wheel brake assembly A wheel brake assembly in which the webs of brake shoes are held in a planar alignment between and supported by a pair of parallel-spaced interconnected supporting plates, in turn supported by an axle or spindle. A pair of brake contracting springs interc... | 04/24/1979 |
| 4113073 | Wheel cylinder A wheel cylinder body is made from a constant cross section extrusion having a bore forming the working chamber of the wheel cylinder without further finishing of the chamber wall. A block-like step section, formed as part of the extrusion on the outside ... | 09/12/1978 |
| 4042080 | Wheel cylinder piston construction A wheel cylinder piston made of powdered metal is provided with a through hole and a steel or powdered metal insert of hard metal received in and fills the hole. The hardened insert acts directly against a tang of the brake shoe, eliminating the need for ... | 08/16/1977 |
| 4039056 | Brake shoe assembly Integrally formed brake shoe for use with cylindrical automotive brake drums in hydraulic brake systems are fabricated by bending and shaping sections of extruded lengths of the material having a T-shaped cross-sectional configuration. Connector pins for ... | 08/02/1977 |
