Patent ID: 8631554
Filing Date: 2014-01-21
Classification: B25B,Y10T

Abstract:
1. A blind rivet nut setting device comprising: a housing; a tension bolt rotatably and axially movably arranged in the housing, such that a least a portion of the tension bolt projects out of the housing, the at least a portion having a threaded region; a pneumatic/hydraulic pressure booster having a pneumatic cylinder and a hydraulic cylinder; a pressure-controlled switch valve structured so that, in a first position, connects the pneumatic cylinder to an outlet channel and, in a second position, connects the pneumatic cylinder to a pressure supply; an actuating element structured to switch the switch valve into the second position, so that a control line, which has a passage connected to the environment until closed by reaching at least one of a setting stroke and a setting force, is connected to a pressure supply via a passage throttle and the switch valve; and a pressure control valve having a control chamber that is connected to the pressure supply via a control throttle, the pressure control valve is structured so that a pressure in the control chamber acts on a first control surface in a direction of a first switch position and so that a pressure in the control line acts on a second control surface in a direction of a second switch position, wherein the actuating element is further structured to relieve pressure on the control chamber, whereby the pressure control valve is moved into the second switch position to connect a motor line and a switch channel of the switch valve to the pressure supply, which switches the switch valve into the first position.