| 摘要 |
PCT No. PCT/GB94/02390 Sec. 371 Date Jul. 15, 1996 Sec. 102(e) Date Jul. 15, 1996 PCT Filed Oct. 31, 1994 PCT Pub. No. WO95/12758 PCT Pub. Date May 11, 1995A central impeller is sandwiched between fixed walls and is driven through a circular path of small radius, but prevented from rotating by a ring-shaped shutter or slider which surrounds and guides it. The shape of the impeller and slider are such that displacement chambers are formed between them, which expand and contract as the impeller follows a circular path and imparts a reciprocating motion to the slider. The two fixed walls contain suction and discharge ports which are covered and uncovered by the impeller and the slider as they perform their motions. |
