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(11)    Patent No :    AP 2177   
(21)    Application No :    AP/P/2007/004085   
(22)    Filing Date :    22.12.2005   
(24)    Date of Grant &    24.11.2010   
           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
NZ    533840    30.12.2004

(84)    Designated State

BW    GM    GH    KE    LS    MW  MZ   NA   SL
SD    SZ    T Z    UG    ZM    ZW

73) Applicant(s)

ECOLOGICS (NZ) LIMITED, 29 Lunns Road, Christchurch,

New Zealand

(72) Inventors

McNEIL George, Roderick, New Zealand

(74) Representative

FISHER CORMACK & BOTHA
 

(51)  International  Classification   F04B 43/02 (2006.01)    F04B 33/00 (2006.01)
F16K 15/14 (2006.01)    F04B 45/04 (2006.01)

(54)    Title

Reciprocating pump

(57)    Abstract

A pump 60, 160 has a pair of working members (preferably diaphragms 1, 2, 101, 102) and a pump chamber 3, 4, 103, 104 associated with each working member is communicated via check valves 32-35, 132-135 to a suction manifold 30, 130 and to an outlet manifold 31, 131. A drive mechanism 10,
110    couples the working members so that they reciprocate together and a first of the working members performs an outlet stroke while a second of the working members performs a suction stroke. The suction and outlet manifolds

30, 130, 31, 131 are incorporated ina manifold assembly that connects the pair of diaphragms 1, 2, 101, 102 for coordinated reciprocation. A pair of manually-operated levers 7, 8, 107, 108 are connected together for opposite reciprocation and are drivingly connected to the working members 1, 2, 101,

102.    A flapper check valve 32-35, 132-135 has a valve seat 40, 140 with a plurality of flow openings 41, 141 extending therethrough; the valve member

25, 125 includes a plurality of contiguous flaps of resilient material, each supported by the valve seat 40, 140 around the periphery of each opening

(56)    Documents Cited :    GB 1379594 A    US 4472115 A    US 5445505 A

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