| 摘要 |
1,107,533. Washing machines. LICENTIA PATENT - VERWALTUNGS G.m.b.H. 14 April, 1965 [14 April, 1964; 11 March, 1965], No. 16029/65. Heading D1A. A rotary drum washing machine comprises a piston of smaller cross-section than the drum 2 and connected thereto by a diaphragm 55 the piston being moved along the axis of the drum by a pressure medium flowing in behind the diaphragm which at the same time squeezes out washing thrown against the drum wall when the drum rotates. The drum 2 is rotated in a fixed tub 21 by motor 23 through worm and toothed gearing 25, 26, comprising steel gears paired with plastics gear to reduce noise and engaging a toothed ring 11 on drum 2. The perforated middle part 1 of drum 2 is of stainless steel or plastic and is connected to first conical part 13 and a second conical part, e.g. of plastic, stainless steel or stainless steel coated in plastic. The three parts of drum 2 are secured together by four bolts 8. A heating coil 85 heats suds in the drum and the suds and rinsing water are pumped out by pump 30. Operating water is pumped in under the cylindrical piston 38 by pump 28 through conduit 104 and cylinder 103 which may also be of plastics, stainless steel or stainless steel coated with plastics and carries a hollow body 102 integral with part of the drum so that cylinder 103 acts as a stub shaft to carry the slidable drum. Body 102, which has four slots 107, 108, is the slotted hub 37 of piston 38 which comprises the annular portion 45, 47, 56 connected by radial ribs forming inner spaces, e.g. 39, 41 and end wall 43 to hubs 37. Operating water passes through slots 105, 106 to the space behind piston 38 and diaphragm 55 to force the piston 38 to the right as drawn in Fig. 1a, against the action of springs 48. Ribs 14a, 14b, 14c in part 13 guide wall 47 when hubs 37 slides off body 102. A filling opening is provided between ribs 14a, 14b and the end of the drum is mounted in a simple bearing. In operation, after washing with continuous reversing at 40-50 r.p.m. operating water is fed behind the piston 38 and the speed is increased to 80-100 r.p.m. e.g. by a 1:2 pole changing motor so that the washing is distributed round the outside of drum 2. As piston 38 advances diaphragm 55 presses the washing against the perforated part 1 and when piston 38 reaches its right hand position the pressure of the operating water increases and when the pressure is removed springs 48 return the piston. Squeezing out may be repeated and in between the drum speed may be reduced and it may be reversed. The operating water may be held in a special reservoir and continuously re-used, being topped up when necessary. In a modification, Fig. 2, two diaphragms 55a, and i and two pistons 38a and i are provided, the pistons being biassed to the left by springs. Both diaphragms are connected to the base of piston 38a and their other ends are secured respectively to parts 2, 2<SP>1</SP>. |
