Compact mechanical pump
View Patent ↗A compact mechanical pump is provided. The pump is adjustable between a compact form and an expanded form, where the pump can be reduced to a compact form for ease of portability and storage and to the expanded form for use as a pump.
1. A pump enclosure assembly comprising:
an expandable base having a proximal end and a distal end, the base comprising: a first base section and a second base section, wherein the first base section is in sliding engagement with the second base section such that the first base section and the second base section are slidably movable relative to each other between a compacted position and an expanded position, wherein the base in the expanded position is adapted to seat a chamber body having a plunger, wherein the chamber body defines a bore and an outlet, and the plunger is slidably disposed within the bore;
a pusher in sliding engagement with the base, wherein the pusher is dimensioned to contact the head of the plunger;
a puller in sliding engagement with the base;
a spring comprising a first end portion and a second end portion, wherein the first end portion is connected to the puller and the second end portion is connected to the pusher, whereby slidably moving the puller distally when the chamber body having the plunger is seated in the base causes the pusher to contact and exert force on the head of the plunger; and
an expandable cover pivotally connected to the proximal end of the base, a linkage pivotally coupled between the cover and the puller and structured and arranged to translate the opening of the cover to the movement of the puller and pusher towards the proximal end, and the closing of the cover when the chamber body has been disposed engages the pusher against the plunger and moves the puller towards the distal end and tensions the spring;
wherein the expandable base and expandable cover enclose the chamber body, the spring, puller, and pusher structured and arranged to provide force to the plunger of the chamber body providing a pressure pump.
2. The pump assembly of claim 1 , wherein the chamber body comprises a syringe barrel and the plunger is a syringe plunger.
3. The pump assembly of claim 1 , wherein the pressure pump operates in equilibrium based on back pressure and flow rate.
4. A pump enclosure assembly, comprising:
a housing having a distal end and a proximal end, the housing comprising:
(a) an expandable base comprising a first base section and a second base section, wherein the first base section is in sliding engagement with the second base section such that the first base section and the second base section are slidably movable relative to each other between a compacted position and an expanded position, wherein the base in the expanded position is adapted to seat a chamber body having a plunger, wherein the chamber body defines a bore and an outlet, and the plunger is slidably disposed within the bore;
(b) an expandable cover comprising a first cover section and a second cover section, wherein the first cover section is in sliding engagement with the second cover section, and wherein the cover is pivotally connected to the base at a position allowing the cover to open and close, and such that slidably moving the second base section relative to the first base section moves together the second cover section relative to the first cover section when the cover is in the closed position;
a pusher in sliding engagement with the base, wherein the pusher is dimensioned to contact the head of the plunger;
a puller in sliding engagement with the base;
a spring comprising a first end portion and a second end portion, wherein the first end portion is connected to the puller and the second end portion is connected to the pusher; and
a first linkage pivotally coupled to the cover and the puller, wherein the pivots of the first linkage are located to move the puller towards the distal end when the cover is lowered and move the puller towards the proximal end when the cover is raised,
whereby moving the puller towards the distal end by lowering the cover when the chamber body having the plunger is seated in the base causes the pusher to contact and exert force on the head of the plunger, the spring, puller, and pusher structured and arranged to providing force to the plunger of the chamber body providing a pressure pump.
5. The pump assembly of claim 4 , wherein the chamber body comprises a syringe barrel and the plunger is a syringe plunger.
6. The pump assembly of claim 4 , wherein the cover is dimensioned to cover the base in the compacted and expanded positions.
7. The pump assembly of claim 4 , wherein the first linkage is rigid.
8. The pump assembly of claim 4 , further comprising a second linkage pivotally coupling the cover to the puller, wherein the pivots of the second linkage are located such that the second linkage together with the first linkage pushes the puller towards the distal end when the cover is lowered, and the second linkage together with the first linkage pulls the puller towards the proximal end when the cover is raised.
9. The pump assembly of claim 8 , wherein the second linkage is rigid.
10. The pump assembly of claim 4 , comprising a base guide system disposed on the first base section or the second base section for guiding the first base section and second base section slidably movably between the compacted position and the expanded position.
11. The pump assembly of claim 10 , wherein the base guide system comprises a base guide rail on the first base section or the second base section, and a corresponding complementary base guide track on the second base section or the first base section, wherein the base guide rail mates slidably with the corresponding complementary base guide track.
12. The pump assembly of claim 4 , further comprising a base stop on the first base section or the second base section for preventing the first base section and the second base section from separating when the first base section and the second base section are in the expanded position.
13. The pump assembly of claim 4 , comprising a cover guide system disposed on the first cover section or the second cover section for guiding the first cover section and the second cover section slidably movably between the compacted position and the expanded position.
14. The pump assembly of claim 13 , wherein the cover guide system comprises a cover guide rail on the first cover section or the second cover section and a corresponding complementary cover guide track on the second cover section or the first cover section, wherein the cover guide rail mates slidably into the corresponding complementary cover guide track.
15. The pump assembly of claim 4 , further comprising a cover stop on the first cover section or second cover section for preventing the first cover section and the second cover section from separating when the first cover section and the second cover section are in the expanded position.
16. The pump assembly of claim 4 , further comprising a collar for centering and/or holding the chamber body, wherein the collar is positioned distal to the pusher.
17. The pump assembly of claim 16 , further comprising a collar stop for preventing movement of the collar distally at a defined position.
18. The pump assembly of claim 17 , wherein the collar stop is attached to the distal end of the second base section.
19. The pump assembly of claim 4 , comprising one or more track systems on the base for slidably mounting the puller, the pusher, and/or the collar.
20. The puller assembly of claim 19 , wherein the track system is present on the second base section.
21. The pump assembly of claim 19 , wherein the puller comprises a puller guide element which slidably mounts the puller to the one or more track systems.
22. The pump assembly of claim 19 , wherein the pusher comprises a pusher guide element which slidably mounts the pusher to the one or more track systems.
23. The pump assembly of claim 19 , wherein the collar comprises a collar guide element which slidably mounts the collar to the one or more track systems.
24. The pump assembly of claim 4 , wherein the spring comprises a tape spring.
25. The pump assembly of claim 24 , wherein the tape spring produces substantially constant force on the plunger head of a chamber body seated in the base when the puller is slidably moved towards the distal end.
26. The pump assembly of claim 4 , wherein the cover is pivotally connected to the proximal end of the base by a hinge.
27. The pump assembly of claim 26 , further comprising a damper to dampen the opening motion of the cover.
28. The pump assembly of claim 4 , further comprising a latch assembly or lock assembly for keeping the cover in the closed position on the base.
29. The pump assembly of claim 4 , further comprising a luer locator on the distal end of the first base section for holding or locking the outlet of the chamber body.
30. The pump assembly of claim 4 , further comprising a rejector for rejecting a non-fitting chamber body seated in the base.
31. The pump assembly of claim 4 , wherein the cover comprises a progress window for viewing the chamber body when the cover is closed.