초록 ▼

A wet type friction clutch and an electromagnetic clutch is disclosed wherein a pilot clutch 61 is disposed in a magnetic flux path 95 of an electromagnet 57 and is kept between an armature 71 and the electromagnet 57. Upon excitation of the electromagnet 57, the armature 57 is retracted to allow th

A wet type friction clutch and an electromagnetic clutch is disclosed wherein a pilot clutch 61 is disposed in a magnetic flux path 95 of an electromagnet 57 and is kept between an armature 71 and the electromagnet 57. Upon excitation of the electromagnet 57, the armature 57 is retracted to allow the pilot clutch 61 to be coupled. The pilot clutch 61 includes a plurality of clutch plates 87, 89 which are interleaved with respect to one another for sliding movements. Adjacent clutch plates 87, 87A, 87B, 89, 89A, 89B, 89C, 89D, 89E, 89F are formed with oil guide passageways 86, 96, 98, 106, 108, 110, 114 to create a hydrodynamic pressure effect to allow the clutch plates to be separated with a limited drag torque. Further, the clutch plate has magnetic flux path forming portions 89b, 89c, at inner and outer peripheral sides, between which through-bores 112 are formed to allow bridge portions 120 to be intervened between the through-bores, with each of the bridge portions being configured such that opposing walls of the bridge portions of adjacent clutch plates have reduced contact surface areas to eliminate a leakage of a magnetic flux.

대표청구항 ▼

A wet type friction clutch and an electromagnetic clutch is disclosed wherein a pilot clutch 61 is disposed in a magnetic flux path 95 of an electromagnet 57 and is kept between an armature 71 and the electromagnet 57. Upon excitation of the electromagnet 57, the armature 57 is retracted to allow th

A wet type friction clutch and an electromagnetic clutch is disclosed wherein a pilot clutch 61 is disposed in a magnetic flux path 95 of an electromagnet 57 and is kept between an armature 71 and the electromagnet 57. Upon excitation of the electromagnet 57, the armature 57 is retracted to allow the pilot clutch 61 to be coupled. The pilot clutch 61 includes a plurality of clutch plates 87, 89 which are interleaved with respect to one another for sliding movements. Adjacent clutch plates 87, 87A, 87B, 89, 89A, 89B, 89C, 89D, 89E, 89F are formed with oil guide passageways 86, 96, 98, 106, 108, 110, 114 to create a hydrodynamic pressure effect to allow the clutch plates to be separated with a limited drag torque. Further, the clutch plate has magnetic flux path forming portions 89b, 89c, at inner and outer peripheral sides, between which through-bores 112 are formed to allow bridge portions 120 to be intervened between the through-bores, with each of the bridge portions being configured such that opposing walls of the bridge portions of adjacent clutch plates have reduced contact surface areas to eliminate a leakage of a magnetic flux. profile of the door further includes a cable-receiving notch configured to receive a portion of the loop of the cabling. 6. The system of claim 5, further comprising a guide disposed to direct the portion of the loop of the cabling into the notch. 7. The system of claim 5, further comprising a guide fixed in opposition to the leading edge profile and configured to direct the portion of the loop of the cabling into the notch. 8. The system of claim 5, further comprising a guide movably mounted on the door and configured to direct the portion of the loop of the cabling into the notch. 9. The system of claim 8, wherein the movably mounted guide comprises a guide arm connected to the door with a linkage mounted to the frame. 10. The system of claim 5, wherein the leading edge profile of the door further includes a second cable-receiving notch configured to receive a further portion of the loop of the cabling. 11. The system of claim 10, further comprising a first guide disposed to direct the portion of the loop into one of the cable-receiving notches and a second guide disposed to direct the further portion of the loop into another of the cable-receiving notches. 12. The system of claim 1, wherein the vertical transport system further comprises a semiconductor wafer transport system. 13. The system of claim 1, wherein the door assembly further comprises a closure mechanism disposed to bias the door into a closed position to cover the opening. 14. The system of claim 13, wherein the closure mechanism comprises a spring member having one end mounted near a trailing edge of the door and another end mounted to the frame near the leading edge of the door when the door is in the open position, the spring member biased to pull the door closed. 15. The system of claim 1, wherein the door assembly further comprises an anchorage mechanism disposed to releasably retain the door in an open position uncovering the opening. 16. The system of claim 15, wherein the anchorage mechanism comprises an arm movably mounted to the door and a counterweight movably mounted to the frame, the arm disposed to latch to the counterweight when the door is in the open position. 17. The system of claim 1, further comprising an actuator operative to move the door to a closed position. 18. The system of claim 1, wherein the horizontal door system further comprises: a plenum mounted to the door assembly and suspended to depend below the opening in the floor or ceiling; and a lower door assembly connected to a lower end of the plenum and including a door movably mounted to close a lower end of the plenum. 19. The system of claim 1, wherein the door assembly further comprises a second door movably mounted to the frame in opposition to the door, the door and the second door disposed to converge around the vertical transport system. 20. The system of claim 1, wherein the horizontal door system comprises a fire door system. 21. The system of claim 1, further comprising intumescent fire sealing material disposed within a recess along the leading edge profile of the door. 22. The system of claim 1, further comprising intumescent fire sealing material disposed within channels between the door and the frame. 23. The system of claim 1, wherein the frame further comprises guide tracks, the door disposed to travel along the guide tracks of the frame. 24. An interfloor vertical transport and horizontal closure system comprising: a vertical transport system extendable through an opening in a floor or ceiling, the vertical transport system comprising a drive column comprising vertical elements defining a fixed horizontal cross-section within the opening, the vertical transport system further comprising a robot assembly operable to travel vertically along the drive column; and a horizontal door system operative to seal the opening in the floor or ceiling comprising a door assembly comprising a frame mountable adjacent the opening surrounding the vertical transport system