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Six-year-old Robert W. Patch granted a patent for a "toy truck".
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| Number | Title | Issue Date |
| 5009291 | Brake piston assembly An actuator is described for a disc brake system of the type which includes a piston whose front end is pressed against a disc by pressured hydraulic fluid that is applied to the rear of the piston and that is prevented from leaking by an elastomeric seal... | 04/23/1991 |
| 4973041 | Sorter for accommodating copy paper sheets A sorter for accommodating copy paper sheets which is arranged to receive copy paper sheets from a copying apparatus main body for classification and successive accommodation of the copy paper sheets onto a large number of trays, and characterized in that... | 11/27/1990 |
| 4969541 | Vehicle bump-avoiding brake machine capable of directly pushing a brake pedal and a structure affixed The present invention relates to a vehicle bump-avoiding brake machine and a structure affixed to a brake pedal for the brake machine to push the brake pedal, wherein a motor drives gears, which then drive a rack. it can be easily mounted in various vehic... | 11/13/1990 |
| 4968010 | Slotted disc and elastomeric matrix damper assembly A mechanical connection for providing desirable stiffness and damping of mechanical energy. The connection includes at least one frusto-conical annular disc element having a radial discontinuity extending from inner to outer peripheral edges, and a visco-... | 11/06/1990 |
| 4964516 | Damped extended-motton strut A strut assembly for connecting and damping motion between relatively movable objects. The strut assembly includes a casing containing a pair of movable connecting members which cooperate with ribbed slide elements and elastomeric layers in the casing to ... | 10/23/1990 |
| 4964677 | Vehicle anti-theft system Three stacked components are bolted together. The uppermost component supports a key-controlled actuator which vertically shifts three rods. One of the rods operates a switch. Each of the other two rods controls the flow of fluid in a brake line. Each bra... | 10/23/1990 |
| 4962972 | Cycling automatic wheel lockup control apparatus An automatic wheel lock-up control apparatus alternately and cyclically applies brake-pedal controlled pressure to the primary and secondary brake lines driving the slave cylinders of a vehicle's wheel brakes when the brake-pedal pressure exceeds a predet... | 10/16/1990 |
| 4958706 | Adjustable shock absorbers An adjustable shock absorber includes a valve in the piston which has a flow path. The valve can be adjusted both rotationally and longitudinally to alter different characteristics of the flow path.... | 09/25/1990 |
| 4957331 | Hydraulic anti-skid vehicle braking system In an hydraulic anti-skid braking system (FIG. 1), a valve controlling the flow of braking fluid to a brake actuator is actuated by a pulse-driven stepper motor in response to signals emanating from a skid sensor. In a practical arrangement (FIG. 3), a mo... | 09/18/1990 |
| 4955458 | Blind assembly of parking brake cable to parking brake lever A drum brake assembly having a parking brake actuating lever is so arranged that the parking brake cable end may be assembled in a blind fashion to the end of the actuating lever. The cable is provided with an enlarged end or button. The cable and spring ... | 09/11/1990 |
| 4955671 | Antiskid control device An antiskid control device is for use with the brake assembly of a motor vehicle. It includes a program for detecting any malfunction of wheel speed sensors of the non-driven wheels. The program is adapted to judge when the non-driven wheel sensors are ou... | 09/11/1990 |
| 4953671 | Damping force adjustable hydraulic shock absorber A hydraulic shock absorber is used, for example, in a vehicle, wherein the level of damping force is adjustable in accordance with the road surface conditions or the like during operation of the vehicle. The hydraulic shock absorber includes a piston atta... | 09/04/1990 |
| 4953747 | Table model napkin dispenser A napkin dispenser (10) is disclosed that is a self-contained unit that may be set upon a surface such as a table, counter, or the like. The napkin dispenser (10) has a front (14) and back (16) that oppose one another, each end having hinged doors (26) th... | 09/04/1990 |
| 4953670 | Vehicle wheel speed sensor An apparatus for sensing the angular velocity of a vehicle wheel includes a sleeve, a tone wheel detachably coupled to the sleeve, and an electromagnetic sensor. The sleeve can be rotatably mounted on bushings inside a differential housing. The electromag... | 09/04/1990 |
| 4953834 | Pendulum with bending spring joint A micromechanical bending spring joint is formed of selectively etched wafer material. The joint includes a pair of leaf springs arranged alongside each other. Each spring is inclined at an oblique angle to the opposed surfaces of the wafer and such sprin... | 09/04/1990 |
| 4950028 | Hydraulic braking system An hydraulic braking system includes a primary pressure source connected to a brake actuator and operable by a force input device, a fluid displacer actuated by an electrical stepper motor operated by a controller in response to action of the force input ... | 08/21/1990 |
| 4950027 | Brake pressure regulator In a brake pressure regulator for a hydraulic brake system of automotive vehicles having an anti-locking control and/or a traction skid control and including a master cylinder and a hydraulic brake force booster, the actuating piston of the brake force bo... | 08/21/1990 |
| 4946147 | Fluid-filled elastic mounting structure having orifices A fluid-filled elastic mounting structure including a first fand a second support members disposed in spaced-apart relation with each other in a load-receiving direction, an elastic body elastically connecting the support members, a closure member secured... | 08/07/1990 |
| 4946009 | Electromagnetic valve utilizing a permanent magnet A valve has a magnetic drive unit axially spaced from a valve section. An axially movable armature is moved by an electromagnet and an annular permanent magnet having radial magnetization. Reciprocation of the armature opens and closes a poppet valve to r... | 08/07/1990 |
| 4944370 | Drum drive for use with multiple disc brakes The drum drive (100, 200) comprises a generally annular-shaped drum (100, 200) which extends axially within an axial opening in an inboard half (140, 240) of a wheel (130, 230). The drum drive (100, 200) has end openings (112, 114; 212, 214) at opposite e... | 07/31/1990 |
| 4944372 | Electrically actuated braking system The electrically actuated braking system (10) comprises a controller mechanism (14) that may be activated by a switch (12). The controller mechanism (14) sends a signal to an electric drive motor (20), and receives braking force signals from a sensor (16)... | 07/31/1990 |
| 4941552 | Castor with brake mechanism A castor has a two-armed integrally formed spring metal brake member which is pivoted on the castor body for selective movement between a braking position, in which a detent portion on one arm brakingly engages teeth on the castor wheel, to prevent wheel ... | 07/17/1990 |
| 4941712 | Brake fluid pressure control apparatus in an anti-lock control system A brake fluid pressure control apparatus comprises a fluid pressure control valve provided in a supply passage communicating a master cylinder with wheel cylinders, a stepped piston slidably fitted into the fluid pressure control valve and urged by a retu... | 07/17/1990 |
| 4941554 | Hydraulic torque resistance device A torque resistance device includes a rotor, a vane, and a valve device for regulating the resistance at which the rotor operates. The valve device is mounted to the housing for the rotor and vane assembly. The valve device includes a valve member which i... | 07/17/1990 |
| 4938468 | Non-rotating paper path idler An apparatus in which an advancing sheet is guided along a paper path. The apparatus includes a non-rotating, arcuate member, positioned closely adjacent to a drive roller, defining a nip through which the advancing sheet moves. The arcuate member resilie... | 07/03/1990 |
| 4938542 | Braking system and break-away braking system The present invention provides an electric braking system and an electric break-away braking system which provide sufficient power, i.e. both current and voltage, to all the electric brakes of a truck or trailer to fully activate them when braking is requ... | 07/03/1990 |
| 4938545 | ABS solenoid/isolation valve integration into single-ended solenoid body, using pump pressure actuation An anti-lock braking system (ABS) solenoid/isolation valve integration is provided. When ABS is entered, the ABS supply pump is turned on and the solenoid normally open port is closed to prevent fluid from entering the wheel brake area from either the mas... | 07/03/1990 |
| 4938319 | Linearly adjustable force transfer element with stepless inertia-sensitive blocking A linearly adjustable force transfer element with one or more inertia-sensitive triggering mechanisms for one or two stepless, activatable blocking devices especially adapted for use with a car seat. A vertically adjustable seat frame and optionally safet... | 07/03/1990 |
| 4938324 | Automatic derailleur shifter An automatic derailleur shifter is disclosed which includes a hollow cylinder body and a piston rod movable within the cylinder. The piston rod carries a dual element piston within the cylinder body in a manner to permit substantially unrestricted fluid f... | 07/03/1990 |
| 4936223 | Segmented rail assembly for closed loop work station conveyor system A subsidiary work station loop for a work station conveyor system has a gravity fed rail assembly for trolleys shunted from the main conveyor. An elevator returns the trolleys from the lower end of the rail assembly. Four rail segments define this rail as... | 06/26/1990 |
| 4936425 | Method of operating a vibration attenuating system having semiactive damper means The system includes at least one semiactive damper whose switching between high damping and low damping states is at times delayed until the relative velocity across the damper is no greater than a preselected low magnitude, or until the energy stored by ... | 06/26/1990 |
| 4936554 | Device for automatically raising and lowering of mobile elements of chairs and beds A device raising and lowering bed or chairs including a pneumatic spring associated with each mobile element of the chair or bed and placed to allow, by its extension, raising of this mobile element. Each pneumatic spring is associated with a weight actin... | 06/26/1990 |
| 4936557 | Hydraulically damped rubber cartridge spring A hydraulically damped rubber cartridge spring in which a rubber spring body is surrounded at each lateral end by a permanently vulcanized supporting ring and, in the region between them, by a ring body which consists of two half shells. The ring body and... | 06/26/1990 |
| 4936635 | Brake booster An improved diaphragm is disclosed which partitions the interior of a shell of a brake booster into a constant pressure chamber and a variable pressure chamber. The diaphragm includes a bead which extends around its inner periphery, and which is formed wi... | 06/26/1990 |
| 4934489 | Tandem tire brake An auxiliary locking brake for tandem tires is formed by upper and lower wedge members centrally joined by a threaded shaft moving the wedge members toward and away from each other for impinging confronting thread surfaces of tandem tires when disposed th... | 06/19/1990 |
| 4932636 | Hydraulic-elastomeric mount with bypass through decoupler A hydraulic-elastomeric mount has a pair of liquid filled chambers formed by elastomeric walls and separated by a rigid partition having an orifice that connects the chambers to effect damping. The partition supports a damping decoupler for limited recipr... | 06/12/1990 |
| 4932535 | Formed wire spring element for box spring assemblies A limited deflection spring for use in a box spring assembly has a unitary wire body having a foot portion, an upright yieldable portion on the foot portion and a loading bearing portion at the upper end of the upright portion. The upright yieldable porti... | 06/12/1990 |
| 4932503 | Blind assembly of parking brake cable to parking brake lever A drum brake assembly having a parking brake actuating lever is so arranged that the parking brake cable end may be assembled in a blind fashion to the end of the actuating lever. The cable is provided with an enlarged end or button. The cable and spring ... | 06/12/1990 |
| 4932725 | Mounting device for a wheel cap or a magnet wheel for sensing anti-skid systems on the wheel hub of a vehicle wheel A mounting device for a wheel cap or a magnet wheel for sensing anti-skid systems on a wheel hub of a vehicle, creates a secure seat and greater ease of mountability and dismountability on the wheel hub by having on its outer end section a circumferential... | 06/12/1990 |
| 4932816 | Connecting device for aircraft seats and the like A device for connecting the feet of an aircraft seat to a perforated rail with a C-shaped cross-section includes a base unit on which two feet are centrally arranged at a spacing distance from each other that is equal to the space between the holes. A bri... | 06/12/1990 |
