| 20120107121 | SWITCHABLE COOLANT PUMP - The invention relates to a switchable coolant pump for combustion engines which is driven by a pulley, wherein the impeller can be driven switchably by the pulley by way of a friction pairing. It is the aim of the invention to develop a switchable coolant pump for combustion engines of the above type, which is simple to manufacture in terms of the manufacturing engineering thereof, driven by a pulley, and which is suited particularly for smaller coolant pumps (which is to say, coolant pumps in which the distance between the pulley and the impeller is smaller than 15 mm and the pulley diameter of which is smaller than 50 mm). The switchable coolant pump according to the invention, comprising a connecting flange ( | 05-03-2012 |
| 20110293458 | VANE CELL PUMP - The invention relates to vane cell pumps having a rotor mounted in a pump housing and driven by a shaft, multiple vane plates mounted in the outer circumference of this rotor, and an outer ring that surrounds the rotor and the vane plates, whereby this ring is disposed either directly in the pump housing, or in a setting ring that can be moved in the pump housing, along predetermined paths. The purpose is to develop a new type of vane cell pump having a new type of pump chamber geometry, which guarantees optimal, complete filling, in terms of flow technology, of the pump chambers, particularly at speeds of rotation in the range from 4500 rpm to beyond 6000 rpm, and furthermore is easy to manufacture, in terms of production technology. The vane cell pump according to the invention, having transverse grooves disposed in the cylinder mantle surface of the rotor, between the bearing grooves of the vane plates, running over the entire rotor width, disposed parallel to the bearing grooves of the vane plates, spaced apart from the bearing grooves by a bearing crosspiece, is characterized in that these transverse grooves have a non-symmetrical cross-section progression, which has a low point in each cell chamber, which point is always disposed behind the cell chamber center axis, seen in the direction of rotation. | 12-01-2011 |
