Patent GB-429259-A (GB)
Title: Improvements in friction clutches
IPC: F16D25/04
Filed: 1933-10-19
Abstract: 429,259. Friction clutches; variablespeed and reversing gearing. KREUSER, A. H. K., 33, Jõgerallee, Hamm, Westphalia, Germany. Oct. 19, 1933, Nos. 28995, 28996, 28997, 28998, and 28999. Convention dates, Oct. 19, 1932, Feb. 2, 1933, March 28, 1933, March 28, 1933, and June 27, 1933. [Class 80 (ii)] In a friction clutch, a hollow chamber in one of the clutch members is adapted to be supplied with fluid under pressure whereby a tubular wall of the chamber is distended radially into frictional contact with the other clutch member, the tubular wall being an integral part of its clutch member or comprising a sleeve rigidly secured thereto at its ends in a fluid-tight manner, as by welding or shrinking. In the reversing gear shown in Fig. 4, employing two such clutches, the hollow chamber 33 of each clutch is formed in the inner clutch member 27, the outer tubular wall 29 of the chamber being adapted to be distended radially into contact with the inner surface of the encircling gear 24 by pressure fluid supplied through a passage 32. As shown in Fig. 5, a sleeve 47, between which and the inner clutch member 46 a pressure space 50 is formed, is at one end secured to the member 46 by a shrunk-on collar 48 and is at the other end 49 shrunk on to a reduced portion of the member 46. The friction surfaces are conical and the outer member 52 is in threaded engagement with a disc 55 which is disposed between the end 49 and a nut 56 and which serves to position the gear 54 and by rotation of which the member 52 may be adjusted axially within the gear. Where the pressure space is large, it may be partially filled by a divided ring. As shown in Fig. 8, the sleeve 73 is secured within the outer clutch member 74 at one end by a shrunk-on ring and at the other end by a collar 75 which is forced into the conical end of the sleeve and which is held by a ring 77. Where the clutch surfaces are lubricated, one or both of the surfaces may be subdivided by means of grooves, whereby clutch engagement is accelerated. In the reversing gear for a press shown in Fig. 15, employing two clutches 105, 106, the latter are controlled by inlet and exhaust valves 116, 117 and 118, 119 controlled by a single hand lever 129. The valves may also be controlled automatically by adjustable stops 132, 133 on the cross-head 131 co-operating with a lever 135. In the combined changespeed and reversing gearing shown in Fig. 16, the gear pairs 137, 139, 141 of the changespeed gear are brought into operation by the selective engagement of clutches by supply of pressure fluid through conduits 143, 144, 145, and the reversing gear also employs two such clutches 149, 153, to the friction surfaces of which lubricating oil is separately supplied. The Specification as open to inspection under Sect. 91 comprises also a construction wherein a sleeve 37, Fig. 5 (Cancelled), between which and the inner clutch member 38 a pressure space 42 is formed, is secured at its ends to the member 38 by shrinking, the ends of the sleeve being enlarged and the large space 42 thus created being partially filled by a divided ring 43. The friction surfaces are conical, the outer clutch member 39 being adjustable axially within the axially-positioned gear 35 by rotation of an end cap C relative to the gear. Alternatively, the inner clutch member may be axially adjustable. This subject-matter does not appear in the Specification as accepted.