Title:
POSITIVE DISPLACEMENT PUMP
Document Type and Number:
WIPO Patent Application WO/1998/027317
Kind Code:
A1
Abstract:
The present invention pertains to a positive displacement pump comprising a casing (1) with inlet and outlet apertures (14, 15) which connect with working chambers (10, 11) of varying volume, a hub (2) with a double acting piston (3) united therewith and a device intended to enable a rotary-oscillatory movement by both the hub (2) and the piston (3). In a first embodiment, said device includes a separating partition (9) fixedly attached to the inner wall of the casing (1) as well as a slot (7) provided in the piston (3). The separating partition (9) is located in the slot (7), and the piston (3) is ring-shaped and mounted transversally to the hub (2) axle (5). In a second embodiment, a pair of pistons (45) facing each other is installed on the hub (2), and the device intended to enable a rotary-oscillatory movement comprises a ring-shaped plate (49) with a slot (48), fixedly attached in the equatorial plane of the pump casing (1) transversally to the pump shaft (6), as well as a separating partition (47) located in the slot (48) and fixedly attached to the hub (2) or both the hub (2) and the pistons (45).
Inventors:
MATVEEV SERGEI BORISOVICH (RU)
Application Number:
PCT/RU1997/000268
Publication Date:
June 25, 1998
Filing Date:
August 20, 1997
Export Citation:
Assignee:
MATVEEV SERGEI BORISOVICH (RU)
International Classes:
F01C3/06; F01C9/00; F02B53/00; (IPC1-7): F01C9/00; F02B53/00
Foreign References:
| US5251594A | 1993-10-12 | |||
| US3816037A | 1974-06-11 | |||
| US4441869A | 1984-04-10 | |||
| US4024841A | 1977-05-24 | |||
| SU1372072A1 | 1988-02-07 |
Attorney, Agent or Firm:
PATENT SERVICES CENTRE 'PATIS' (55a Moscow, 9, RU)
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