Abstract: The present invention relates to automotive vehicle brake lathes configured for resurfacing brake rotor components, and in particular, to an improved on-car brake lathe apparatus and a method for compensating for runout between an on-car brake lathe and a vehicle wheel hub to which the on-car brake lathe is secured for a brake rotor resurfacing operation

Abstract: An apparatus which reduces energy consumption in a wireless client interface by decreasing the amount of time the wireless client interface spends in the awake state and which increases the amount of time it spends in the sleep state. The apparatus comprises: at least one processor for running software configured to communicate with at least one wireless client. The software is configured to: alert the wireless client of the configuration of the apparatus; use a memory space for buffering network application data destined for the wireless client; and release the network application data to the wireless client, based on at least one occurrence of a specified condition that promotes energy savings.

Abstract: A method and apparatus are disclosed for managing power consumption of a processing unit having an operating system (OS) or software system and access to at least one hardware timer. Power is saved by putting the processing unit into one of at least two low power states when the OS or software system is not expected to do work. A time period for which the software system is not expect to perform work is determined, and a determination is made as to which one of at least two low power states to put the processing unit in, in response to said time period. The hardware timer is configured to facilitate waking up the software system or OS in time for it to perform expected work. The processing unit and software system are transitioned into the chosen low power state. They are transitioned out of the low power state in response to a hardware interrupt.

Abstract: Rate management in adaptive data rate wireless communication systems in which communicating stations move with respect to one another implements algorithms for calculation of the repetition rate. A rate management module is used for selecting a proper value of repetition rate to be communicated back to sending station and for a selecting proper value of repetition rate to encode the data at the sending station. The repetition rate calculation procedure enables each station to dynamically calculate the optimum rate with which each station should be receiving information from another station. The repetition rate calculation procedures take into consideration past and present measurements of the link quality, age of the link quality measurements, speed of change in the link quality, packet types, packet lengths, received signal strength, and pattern and correlation in the link quality measurements. The rate management module utilizes one or more tables which are accessible from either hardware or software.

Abstract: A hydraulic control circuit comprises a power unit, a central processing unit, at least one feedback sensor, a valve manifold, and two or more hydraulic lifting cylinders interconnected with miscellaneous hydraulic hoses and electrical wiring. Basic lifting is regulated by a flow divider unit configured to distribute a flow of pressurized hydraulic fluid pumped from a fluid reservoir through the valve manifold to each of the lifting cylinders during a lifting operation. To compensate for any imbalance between the lifting cylinders, the central processing unit monitors the movement of the lifting cylinders, and is configured to divert, through a three-way valve in the valve manifold, an additional portion of the pressurized fluid flow to a lagging lifting cylinder.

Abstract: A repeater that has a receiver for receiving a signal. A validation module determines whether a signature is present in the received signal. An invalidation module determines whether undesired signal components are present in the received signal. The received signal is transmitted if the signature is present and if the undesired signal components are not present.

Abstract: Fairness algorithms and access methods enable non-zero channel access for wireless communication systems operating in a random access channel environment. Fair access to a random access channel for each station in a wireless network is assured by each station calculating a priority or probability for accessing the channel based on logical connections among certain stations, based on other stations perception of the channel and based on each calculating station's own perception of the channel properties.

Abstract: The throughput of a Request-to-Send and Clear-to-Send (RTS/CTS) based distributed media access control protocol is improved by reserving the medium in a hierarchical fashion. The shared medium is reserved for two stations called the participants. During the reserved period, a master (or primary) attribute and a slave (or secondary) attribute are given to the participants and the medium is shared between them using any suitable coordination algorithm. During the reserved time, the secondary can signal the primary station that it has data to send to the primary station and request that the primary and secondary roles or attributes be exchanged. In the case that a role exchange takes place, control of the medium is transferred from one station to another and data transfer in an opposite direction can take place without requiring another reservation.

Abstract: In a wireless multi-rate communications system, a method for extending the range of communications in the system by dividing the physical layer frame into two portions: a robust header portion and a body, where the repetition rate of the data symbols in the header portion is greater than or equal to the repetition rate of the data symbols in the body of the frame. In this way the header can be received and decoded by all stations in the system with a high probability, while the body of the frame need only be received and decoded by the destination station to which the body of the frame is intended to be received and decoded.

Abstract: A method and apparatus for expanding the physical coverage area of a wireless communications network. More specifically, a number of transceivers are connected in a series configuration to a single base station, and each transceiver transmits signals to selected portions (subcells) of the physical coverage area. Each transceiver is connected to a delay unit where all of the delay units are adjusted so that downlink signals transmitted from the single base station will be transmitted from the transceivers to their respective subcells in phase with each other. Since all of the downlink signals from each of the transceivers result from the same downlink signal from the base station and since they are in phase with each other, a wireless unit anywhere in the physical coverage area will receive a downlink signal which is error free.

Abstract: An improved hydraulic circuit for a two-post lift having a master cylinder hydraulically connected to a slave cylinder. The master cylinder and slave cylinder are sized so fluid volume displaced at the rod end of the master cylinder is equal to the volume displaced at the piston side of the slave cylinder. The hydraulic circuit employs an automatic leveling valve assembly disposed to open when the lift reaches a fully lowered position to automatically equalize the displaced fluid volume of the master and slave cylinders so as to relevel the lift each time the lift is fully lowered. A sequence valve is positioned to pre-pressurize the slave cylinder before raising to compensate for any air in the circuit and fluid compressibility. A pilot operated check valve is designed to close and stop the descent of the lift in a level position if an obstruction is encountered under a side of the lift.