114results about How to "Constant resistance" patented technology

The present invention relates to an improved cerebrospinal fluid shunt system comprising a coating covering at least part of the system and a flow restricting component exerting a passive and essentially constant resistance to flow. The present invention also relates to methods for implanting different catheters of a cerebrospinal fluid shunt system into a brain ventricle and the sinus system, respectively, of an individual. The present invention further relates to methods for shunting cerebrospinal fluid from a brain ventricle to the sinus system of an individual.

Disclosed is a low cost LED string circuit design that uses an inexpensive half-wave rectification and low-pass filter circuit that is designed to produce minimal flicker in the LED string that is connected to the circuit. The components of the half-wave rectification and low-pass filter circuit are selected in accordance with design principles that prevent glittering and flickering of the LED string. The circuit components of the half-wave rectification and low-pass filter circuit can be embedded in an outlet plug or as a separate independent unit between an AC power plug and the LED string.

An exercise device capable of simultaneously exercising a plurality of muscle groups, which includes an exercise chair mounted to a base, the exercise chair having a pivotally-resistant seat back. The exercise device further includes large, curvilinear conduits through which pass adjustably-resistant elastic bands with grips fixedly attached to the elastic bands proximate the upper and lower ends of the curvilinear conduits, which curvilinear conduits are laterally spaced, one on each side of the exercise chair. The exercise device further includes a resistive foot platform positioned at the front end of the base, which resistive foot platform is moveably engaged with the exercise chair. The exercise device further includes a resistive seated-row grip positioned at the front end of the base that permits cardiovascular exercise.

A tandem-wheeled riding device includes first and second riding wheel assemblies secured to a bottom surface of a platform for supporting a rider. At least one of the riding wheel assemblies is swivelly coupled to the platform to provide aggressive turning agility to the device. The device further includes at least two outrigger wheel assemblies coupled to the platform and biased toward the riding surface to improve stability of the riding device during sharp turns.

A sport performance enhancing system includes a left glove, a right glove, a vest, a belt, a left shoe, a right shoe, and a plurality of resistance bands. The left glove and the right glove each consist at least one D-ring which provide the attachment of the left and right glove with the plurality of resistance bands. The vest also consist a plurality of vest rings that attaches with the plurality of resistance bands, attaching the left and right glove. A plurality of O-rings and a shoe D-ring in the left and right shoe are attached to the plurality of resistance band from one end, and the free end of the plurality of resistance bands attaches with a plurality of vertical rings and a plurality of horizontal rings which are positioned around the belt.

In an output buffer circuit including Inverter 1 to Inverter 3, Delay Circuit 1 to Delay Circuit 3 for delaying an input signal for a specific time, Buffer 1 to Buffer 3, and a function for transmitting a logic signal to a transmission path and in accordance with an amount of signal attenuation in the transmission path, creating at a transmission side a waveform including four or more kinds of signal voltages, the preemphasis amount is made variable and the ON resistance Rs of the buffer is made constant. Selector circuit 1 to Selector circuit 3 are situated before the buffers, the inverter, capable of selecting through selector logic a signal to be inputted to the buffer, inverts a data signal, and the preemphasis amount and the number of preemphasis taps are adjusted through a selection signal for the selector logic.

A resistor device includes a resistor plate having opposite first and second surfaces; a first metal layer including first and second portions which are disposed on the first surface of the resistor plate at opposite first and second sides, respectively; and a second metal layer including a first sensing pad, a second sensing pad, a first current pad and a second current pad, separate from one another, wherein the first sensing pad and the first current pad are disposed on the first portion of the first metal layer and the second sensing pad and the second current pad are disposed on the second portion of the first metal layer. A protective layer is preferably provided, overlying the resistor plate and the first metal layer uncovered by the second metal layer.

An automated transaction machine (10) includes a thermal printing apparatus for printing account statements for a user. A paper drive (36) moves a paper web (44) from a paper roll (42) through a printer (40). After indicia is printed on the paper, the paper is cut by a cutter (37) into sheets and delivered to a user by a presenter drive (30). After paper cutting, the paper is moved a short distance in a direction opposed to the direction that the paper normally moves during printing. A paper control device (49) operates to maintain a relatively constant resistance force to movement of the web in the printing direction after the paper has been retracted. The paper control device limits application of resistance forces to below a threshold as well as sudden fluctuation of resistance forces on the paper web which may otherwise cause the paper to slip relative to the drive and cause distortion of printed indicia or damage to the web.

The invention discloses a heating control method for a nitrogen oxygen sensor. The nitrogen oxygen sensor comprises a signal function layer and a heater, wherein the heater is of a three-line type heater structure. The heating method comprises the following specific steps of: a, drawing a graph of a temperature value T of a nitrogen oxygen sensor chip and a head resistance value of the heater; b, when the temperature of the nitrogen oxygen sensor chip is determined to be 800DEG C, determining a resistance calibration value of the heater head to be R 800 and a voltage calibration value of the heater to be V800; and c, adjusting a heating voltage value of the heater for enabling a temperature value of the nitrogen oxygen sensor chip to be maintained at 800DEG C. According to the heating control method disclosed by the invention, the temperature value change of the head of the nitrogen oxygen sensor chip is characterized by adopting the amplitude of the head resistance value of the heater; and a work temperature value of the nitrogen oxygen sensor chip is enabled to be controlled at about 800DEG C by changing voltage values applied to two ends of the heater, and thus the measurement precision of the nitrogen oxygen sensor for NOx is further improved.

Provided are resistive random access memory (ReRAM) cells and methods of fabricating thereof. The resistive switching nonvolatile memory cells may include a first layer disposed. The first layer may be operable as a bottom electrode. The resistive switching nonvolatile memory cells may also include a second layer disposed over the first layer. The second layer may be operable as a resistive switching layer that is configured to switch between a first resistive state and a second resistive state. The resistive switching nonvolatile memory cells may include a third layer disposed over the second layer. The third layer may be operable as a resistive layer that is configured to determine, at least in part, an electrical resistivity of the resistive switching nonvolatile memory element. The third layer may include a semi-metallic material. The resistive switching nonvolatile memory cells may include a fourth layer that may be operable as a top electrode.

The present invention provides a variable runner length intake air manifold operative to optimize the performance of an internal combustion engine over a wide range of engine speeds. The manifold includes a housing formed of upper and lower halves fixedly attached via conventional fastening means. The upper and lower halves define a plurality of runners having constant cross-sectional areas but different cross-sectional shapes. A tapered drum is disposed within the housing and includes one open end and a plurality of openings formed in the outer surface that communicate with corresponding runners of the housing. The tapered drum is rotatably mounted within the housing such that the effective runner length or airflow path of the manifold is made adjustable by varying the angular position of the tapered drum disposed within the housing.

The present invention relates to a self-regulating electrical resistance heating element, to an appliance containing same, and to processes for their manufacture. The self regulating electrical resistance heating element (10) comprises a substrate (12) comprising an electrically conductive coating (12a) which serves as a first electrical contact (18) on one side of the composite metal oxide layers. Disposed on said electrically conductive layer (12a) is a first metal oxide (14) which has a positive temperature coefficient of resistance. Overlaying the first metal oxide layer, and in electrical series thereto, is a second metal oxide layer (16) having a negative temperature coefficient of resistance and overlaying this layer is a second electrical contact (20). The second metal oxide layer (16) having a negative temperature coefficient of resistance is applied to the element in a manner which ensures it's resistive characteristics are not altered.

A two terminal transmit receive device passes small analog signals with a constant low resistance value to the input of a low noise, low voltage receiver amplifier and can protect the input against the high voltage transmit signals in ultrasound applications without the aid of any power supplies. The device uses depletion-mode transistors that are normally on to pass small analog signal and a voltage detection circuit that quickly turns off the depletion-mode transistors when the presence of high voltage is detected.

The invention relates to a tubular product rolling device. The tubular product rolling device comprises a rack, a motor arranged on the rack and a rotating shaft rotatably arranged on the rack. The motor drives the rotating shaft to rotate at a uniform speed, a sleeve is further rotatably connected on the rotating shaft in a sleeving manner, and a friction pair is formed between the inner circumference of the sleeve and the rotating shaft. With a tubular product being rolled, the actual rolling radius of the tubular product is increased gradually, the tubular product blocks rotation of the sleeve, and the sleeve and an elastic part slide relatively, that is, the rotating speed of the sleeve is lower than that of the rotating shaft, so that the rolling linear speed of the tubular product isconstant. The rolling linear speed of the tubular product is equal to an output speed of a first extruder, the tubular product is prevented from being deforming as a result of a too large tensile force, and follow-up normal production is guaranteed, so that a product part is relatively high in production quality.

A trolley includes a housing, at least one sheave rotatably mounted at least partially within the housing, and a braking mechanism. The braking mechanism includes a rotor assembly coupled to the at least one sheave, at least one conductive element, and at least one magnetic element. The rotor assembly is rotatable with the at least one sheave, and when the rotor assembly rotates, the at least one conductive element overlaps with the at least one magnetic element based at least in part on a rotational speed of the rotor assembly.

The invention provides a vertical injection molding machine capable of periodically feeding lubricant to sliding portions of the turntable to maintain a substantially constant turntable slide resistance and also capable of determining the position of the repeatedly revolving turntable. During operation of a vertical injection molding machine 1, lubricant is periodically fed from a pump 30 to slide portions S of the revolving turntable 14 so as to maintain the slide resistance of the sliding portions S substantially constant. Further, a motor control means 51 resets the count of pulses output from an encoder 29 at a timing at which the number of revolutions of a servomotor 25 and the number of revolutions of the turntable 14 are integers, so that it is possible to prevent pulse errors from accumulating even when the turntable 14 is revolved many times in the same direction.