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Pulley

About: Pulley is a research topic. Over the lifetime, 51636 publications have been published within this topic receiving 178220 citations. The topic is also known as: drum & block.


Papers
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Patent
22 May 2001
TL;DR: In this article, a belt-type continuously variable transmission of a vehicle having a continuously variable speed ratio is controlled by changing a groove width of each of the pulleys, and a belt clamping pressure applied to at least one pulley to clamp the torque transfer belt also is controlled.
Abstract: An apparatus and a method control a belt-type continuously variable transmission of a vehicle having a continuously variable speed ratio, which is a ratio of a rotation speed of an input shaft to a rotation speed of an output shaft. The speed ratio of the transmission is controlled by changing a groove width of each of the pulleys, and a belt clamping pressure applied to at least one of the pulleys to clamp the torque transfer belt also is controlled. Furthermore, the speed ratio of the transmission is set to a low-load speed ratio when it is determined that control of the belt clamping pressure has failed and the belt clamping pressure is raised to a high level. The low-load speed ratio is predetermined so that a load applied to the torque transfer belt is substantially minimized.

30 citations

Patent
Knutson Paul S1
09 Nov 2000
TL;DR: A power transmission belt using an open mesh textile material in the belt overcord which is stabilized with a material promoting permeation of an underlying gum rubber layer through interstices in the textile material during vulcanization of the belt is described in this paper.
Abstract: A power transmission belt (11) using an open mesh textile material (15) in the belt overcord which is stabilized with a material promoting permeation of an underlying gum rubber layer (17) through interstices in the textile material (15) during vulcanization of the belt. The coefficient of friction of the backside of the belt is sufficient to enable the belt to drive backside pulleys, tensioners and other mechanical devices.

30 citations

Patent
29 Oct 1999
TL;DR: A pulley for use with an endless metal belt, including pulley halves rotatable about an axis, is described in this article, where the outer surface of each pulley half has a centerline average roughness of 0.1 to 0.5 μm, a Vickers hardness of not less than 850 at a load of 200 g, and a microstructure with random fine irregularities in which a great number of recesses and projections are randomly located.
Abstract: A pulley for use with an endless metal belt, including pulley halves rotatable about an axis. The pulley halves include truncated conical portions symmetrically opposed to each other and outer surfaces disposed on the truncated conical portions so as to be engageable with the belt. The outer surface of each pulley half has a centerline average roughness (Ra) of 0.1 to 0.5 μm, a Vickers hardness (Hv) of not less than 850 at a load of 200 g, and a microstructure with random fine irregularities in which a great number of recesses and projections are randomly located. A continuously variable transmission including the pulley is also disclosed.

30 citations

Patent
26 Jul 2007
TL;DR: In this article, a lift system is configured to provide a constant force to the first tension member during a defined angle of rotation of the first pulley, which can be used to counterbalance the weight of a display supported by a stand.
Abstract: A lift system having a first pulley and a biasing member having a first portion operatively coupled to the first pulley. A first tension member can be operatively coupled to the first pulley. The lift system may be configured to provide a constant force to the first tension member during a defined angle of rotation of the first pulley. Such a constant force can be used to counterbalance the weight of a display supported by a stand.

30 citations

Patent
07 Apr 1953

30 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023104
2022235
2021173
20201,029
20191,981
20183,674