NZ524871A - Pneumatic pinch mechanism for a deformable tube - Google Patents

Pneumatic pinch mechanism for a deformable tube

Info

Publication number
NZ524871A
NZ524871A NZ524871A NZ52487101A NZ524871A NZ 524871 A NZ524871 A NZ 524871A NZ 524871 A NZ524871 A NZ 524871A NZ 52487101 A NZ52487101 A NZ 52487101A NZ 524871 A NZ524871 A NZ 524871A
Authority
NZ
New Zealand
Prior art keywords
chamber
deformable tube
pinch mechanism
pneumatic pinch
piston
Prior art date
Application number
NZ524871A
Inventor
Robert Donald Grapes
Original Assignee
Prec Dispensing Systems Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Prec Dispensing Systems Ltd filed Critical Prec Dispensing Systems Ltd
Priority to NZ524871A priority Critical patent/NZ524871A/en
Priority claimed from PCT/NZ2001/000172 external-priority patent/WO2002018790A1/en
Publication of NZ524871A publication Critical patent/NZ524871A/en

Links

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  • Reciprocating Pumps (AREA)

Abstract

A pinch mechanism, which can be used as part of a pump, includes a deformable tube (10) enclosed within a body (11) which has a first chamber (11a). The deformable tube (10) defines a flow passage. A second chamber (19) is coupled via passage (17) to the first chamber (11a). A piston (20) is located within the second chamber (19) and movable between first and second positions. Upon moving to the first position a pressure increase occurs in the first chamber (11a). Upon moving to the second position a negative pressure is created in the first chamber (11a). A vent means (25) is located at a point during movement of the piston (20) between the first and second positions which enables pressure equalisation within the second chamber (19) to occur.
NZ524871A 2000-08-28 2001-08-24 Pneumatic pinch mechanism for a deformable tube NZ524871A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NZ524871A NZ524871A (en) 2000-08-28 2001-08-24 Pneumatic pinch mechanism for a deformable tube

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NZ50655200 2000-08-28
NZ51025601 2001-03-01
NZ524871A NZ524871A (en) 2000-08-28 2001-08-24 Pneumatic pinch mechanism for a deformable tube
PCT/NZ2001/000172 WO2002018790A1 (en) 2000-08-28 2001-08-24 Pneumatic pinch mechanism for a deformable tube

Publications (1)

Publication Number Publication Date
NZ524871A true NZ524871A (en) 2006-03-31

Family

ID=36293217

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ524871A NZ524871A (en) 2000-08-28 2001-08-24 Pneumatic pinch mechanism for a deformable tube

Country Status (1)

Country Link
NZ (1) NZ524871A (en)

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