Dosage equipment

• US 4,995,432 A
• Filed: 10/13/1988
• Issued: 02/26/1991
• Est. Priority Date: 02/20/1987
• Status: Expired due to Term

• Current Assignee: Labsystems Oy (Thermo Fisher Scientific Incorporated)
• Original Assignee: Labsystems Oy (Thermo Fisher Scientific Incorporated)
• Inventors: Heinonen, Mauno, Koivisto, Juha, Priha, Matti, Tervamaki, Jukka
• Primary Examiner(s): Recla, Henry J.
• Assistant Examiner(s): Jacyna, Casey
• Application Number:
  US07/265,876
• Time in Patent Office: 866 Days
• Field of Search: 417/474-477, 141/67, 141/130, 141/156, 141/163, 422/63, 422/81, 422/82, 604/153, 128/DIG. 12
• US Class Current: 141/130
• CPC Class Codes: B67D 7/66 of rotary type
• CPC Class Codes: F04B 43/1215 having no backing plate (deforming of the tube only by rollers)
• CPC Class Codes: G01F 11/125 of the peristaltic pump type peristaltic pumps per se F04B43/12
• CPC Class Codes: Y10S 128/12 Pressure infusion

Abstract

Dosage equipment, which includes a peristaltic pump for the dosage of liquid. The set of hoses (17) of the peristaltic pump includes an upper piece (18) and a lower piece (19). The body of the pump includes an attaching piece (13), to which the upper piece and the lower piece can be attached.

Claims

1. A dosage equipment for feeding liquid doses to a plurality of receiving vessels which comprises:

a frame 1,

a peristaltic pump having a stationary part 2 including a stepping motor 11 mounted on said frame 1 and having a motor shaft 7 extending therefrom,

a body piece 12 spaced from said motor and fixed with respect to said frame 1,

said shaft 7 being journalled to said body piece 12,

said peristaltic pump having a two-part hose cassette 3 cooperatively associated therewith,

a pair of spaced end flanges 8 and 9 fixedly mounted on said shaft 7 between said motor and said body piece 12,

a plurality of revolvable shafts 10 spaced about motor shaft 7, each being journalled to said pair of spaced apart end flanges 8 and 9

a counter-piece 13 mounted on said frame 1 and connected to said body piece 12 to fixedly secure said body piece with respect to motor shaft,

said counter-piece further being adapted to support said two-part hose cassette,

said two-part hose cassette 3 comprising cooperatively associated upper part 18 and a lower part 19 connected along adjacent sides thereof solely by unstretchable strands 33 such that the two parts 18, 19 fit together about and are supported by said counter-piece 13,

said counter-piece 13 including a free end and having means for engaging with locking means on said upper and lower parts 18, 19 for cooperatively holding said upper and lower parts about said counter-piece 13,

a plurality of spaced-apart elastic hoses 17 passing continuously through said upper and lower parts 18, 19 and providing a loop 17A thereof outside said upper and lower parts for passing around said revolvable shafts 10 in tension engagement therewith to compress said hose and maintain said upper and lower parts in contact with said counter-piece 13,

a set of receiving vessels 39 arranged to receive dosed liquid therein,

each of said hoses 17 being connectable to a source of liquid to be dosed and having a nozzle 20 at one end for feeding dosed liquid to said receiving vessels 39; and

a carriage 36 supporting said vessels 39 and displaceable relative to said peristaltic pump and located beneath said nozzles 20.

2. The dosage equipment as in claim 1 wherein said strands 33 are unstretchable and of sufficient length to permit tensioning of hoses 17 when said cassette 3 is attached to counter-piece 13 when said hoses 17 are wound about revolvable shafts 10 via loop 17A.

3. The dosage equipment as in claim 2, wherein the number of connecting strands 33 is at least two.

4. The dosage equipment as in claim 3, wherein the engaging means on the free end of said counter-piece 13 is a groove 16 which cooperates with locking means on said upper and lower parts 18, 19, said locking means comprising locking cams 24 and 30 on said upper and lower parts 18, 19.

5. The dosage as in claim 4, wherein the upper part 18 is provided with tension adjusting means 27, 28 and 29 for adjusting tension on hoses 17.

6. The dosage equipment as in claim 5, wherein tensioning means 27 with screw 29 therein is adapted to move along and within upper part 18 via screw 29 against limiter 28 to adjust tension on hoses 17.

7. The dosage equipment as in claim 6, wherein tension adjusting means 27, 28 and 29 located within upper part 18 also includes a window 31 located at the bottom of upper part 18 through which the adjustment of said tensioning means can be monitored.

8. The dosage equipment as in claim 1, wherein said deplaceable carriage 36 includes a bleeding vessel 40 into which liquid can be dosed for adjusting the equipment.

9. The dosage equipment as in claim 1, wherein said displaceable carriage 36 located below said nozzles also contains a bleed vessel 40 together with said plurality of dose-receiving vessels 39, wherein said carriage is actuated by a steering system 5 which is in turn actuated by control means 6, said system also including a stepping motor 3 and an endless belt 38 coupled to said carriage 36 mounted on track 34, the system including detectors 42 and 43 for sensing the location of carriage 36 and detector 41 for sensing the position of said bleeding vessel 40.

10. A dosage equipment for feeding liquid doses to a plurality of receiving vessels which comprises:

a frame 1,

a peristaltic pump having a stationary part 2 including a stepping motor 11 mounted on said frame 1 and having a motor shaft 7 extending therefrom,

a body piece 12 spaced from said motor and fixed with respect to said frame,

said shaft 7 being journalled to said body piece 12,

said peristaltic pump having a two-part hose cassette 3 cooperatively associated therewith,

a pair of spaced end flanges 8 and 9 fixedly mounted to said shaft 7 between said motor and said body piece 12,

a plurality of revolvable shafts 10 spaced about said motor shaft 7, each being journalled to said pair of spaced apart end flanges 8 and 9,

a counter-piece 13 mounted on said frame 1 and connected to said body piece 12 to fixedly secure said body piece with respect to said motor shaft 7,

said counter-piece 13 having upper and lower faces 14, 15 against which the two-part cassette is supported, and a groove 16 at its free end for engaging locking means located on said hose cassette,

said two-part hose cassette comprising an upper part 18 and a lower part 19 attached one to the other along adjacent sides thereof solely by unstretchable strands 33 of sufficient length such that said upper and lower parts 18, 19 of said cassettes can be fitted together about said counter-piece 13,

a plurality of spaced-apart elastic hoses 17 passing continuously through said upper and lower parts 18, 19 with each providing a loop 17A thereof outside said upper and lower parts for passing around said revolvable shafts 10 in tension engagement to compress said hoses and maintain said upper and lower parts in contact with said counter-piece 13,

a set of receiving vessels 39 arranged to receive dosed liquid therein,

one end of each hose being connectable to a source of liquid 47 to be dosed and the other end of each thereof being provided with a nozzle 20 used for feeding dosed liquid to said receiving vessels 39; and

a carriage 36 displaceable relative to said peristaltic pump and disposed beneath said nozzles 20, said carriage also containing a bleeding vessel 40 and said plurality of dose receiving vessels 39 for receiving said dose from said nozzles 20.

11. The dosage equipment as in claim 10, wherein the number of connecting strands 33 is at least 2.

12. The dosage equipment as in claim, 10 wherein the upper part 18 is provided with tension adjusting means 27, 28 and 29 for adjusting tension on hoses 17.

13. The dosage equipment as in claim 12, wherein tensioning means 27 with screw 29 therein is adapted to move along and within upper part 18 via screw 29 against limiter 28 to adjust tension on hoses 17.

14. The dosage equipment as in claim 13, wherein tension adjusting means 27, 28 and 29 located within upper part 18 also includes a window 31 located at the bottom of upper part 18 through which the adjustment of said tensioning means can be monitored.

15. The dosage equipment as in claim 10, wherein said displaceable carriage 36 includes a bleeding vessel 40 into which liquid can be dosed for adjusting the equipment.

16. The dosage equipment as in claim 10, wherein said displaceable carriage 36 located below said nozzles 20 contains a bleed vessel 40 together with said plurality of dose-receiving vessels 39, wherein said carriage is actuated by control means 6, said system also including a stepping motor 35 and an endless belt 38 coupled to said carriage 36 mounted on track 34, the system including detectors 42 and 43 for sensing the location of carriage 36 and detector 41 for sensing the position of said bleeding vessel 40.