The Recumbent & HPV Information Center Project346 - home WILD MOTION San José Bike Party | Building community through bicycling Hydraulic brake device patent - Ashima Ltd. 1. Field of the Invention The present invention relates to a hydraulic brake, and more particularly to a hydraulic brake assembly used to apply opposing brake loads on the wheel rim of a vehicle such as a bicycle, a motorcycle, and the like. 2. A conventional rim brake in accordance with the prior art comprises a pair of left and right arms pivotally attached to a frame of a bicycle, each having on its distal end portion a brake shoe, and a spring for energizing the arms to move toward brake releasing direction. A conventional hydraulic brake in accordance with the prior art comprises a hydraulic cylinder, a piston movably received in the axial direction of the cylinder, and a brake pad connected to the piston. The present invention has arisen to mitigate and/or obviate the disadvantages of the conventional rim brake and disk brake. The main objective of the present invention is to provide an improved hydraulic brake device of a vehicle such as a bicycle, a motorcycle, and the like.
urbazstyle Improving Chain Lubrication The majority of chains used in industry suffer unnecessarily short lives. This leads many companies to forego chains all together and replace them with belts. In most cases, however, the problem is not the fault of the chains but rather the method in which they are lubricated. The current chain lubrication practice consists of applying a heavy oil or grease to the outside of the chain. The majority of chains fail from the inside. Figure 1. A penetrating-type chain lubricant not only displaces water, but also cleans dirt and wear metals out of the pins of the chain and off of the sprockets. The operating conditions (including load, environment, temperature and speed) must also be considered. The method of lubrication is equally important. Lubrication is required between the rollers and bushings, but other important areas to lubricate are the pin and bushing surfaces, which articulate with each other while the chain is under full load.
Chopper Style Bicycles Grease Selection: Lithium vs. Lithium Complex According to a recent NLGI Grease Production Survey, approximately 70 percent of the grease sold worldwide is based on either simple lithium soap or lithium complex thickener. You might ask, “Why are those thickener types so popular?” and “How do I decide which one is best for my application?” This article will provide answers to these and a few other questions. First, let us take a historical perspective. Greases based on lithium soap possess many improved properties compared to the other alkali metal soaps that existed in 1942. Lithium complex greases were developed in the late 1940s. Lithium complex greases possess many of the properties of simple lithium soap greases and also have higher dropping points, allowing the greases to be used at higher temperatures. The dropping point of lithium complex greases is higher than that of simple lithium soap greases due to the presence of a second thickener component, known as the complexing agent. Table 1.
Fietshandel Chain Maintenance Chain Maintenance A Religious Question Chain maintenance is one of the most controversial aspects of bicycle mechanics. This article is based on my personal and professional experience and my own theories. [And a comment from John Allen: the problem becomes religious because it addresses mysteries of existence, life and death (of chains...) to which there is no clear and obvious answer -- as long as the chain is exposed to dirt. On the other hand...the Sunbeam oil-bath full chain case solved this problem in 1908. Chain cases have only ever been marketed for single-sprocket utility bicycles, they are an extra-cost item and they add weight and complication. Name your poison, as the saying goes. Man is born free but everywhere he is in chains. Jean-Jacques Rousseau Chains: Old And New The past fifteen years [as of Sheldon's writing, in 1996] have seen many revolutions in bicycle design. There has also been an invisible and little noted revolution in the construction of bicycle chains.