PROPELLANT-FREE PRESSURIZED MATERIAL DISPENSER

• US 20150307258A1
• Filed: 01/16/2014
• Published: 10/29/2015
• Est. Priority Date: 01/16/2013
• Status: Active Grant

• Current Assignee: GreenSpense Ltd
• Original Assignee: GreenSpense Ltd
• Inventors: SCHWARTZ, Adam, HAR-SHAI, Gadi
• Granted Patent: US 10,239,682 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B65D 83/0061 the contents of a flexible bag being expelled by the contracting forces inherent in the bag or a sleeve fitting snugly around the bag

Abstract

A device for dispensing a material under pressure, including at least one elastic portion defining at least one wall of a chamber defining a volume within which said material is to be contained; and at least one non-elastic portion coupled to said at least one elastic portion and affecting a geometry of one or both of said elastic portion and of said chamber; wherein, at least when the material is contained within said chamber, said at least one elastic portion is stretched so as to urge a reduction in volume of said chamber by at least 70%. The non-elastic portion is optionally rigid.

Claims

1. A device for dispensing a material under pressure, comprising:

at least one elastic portion defining at least one wall of a chamber defining a volume within which said material is to be contained; and

at least one non-elastic portion coupled to said at least one elastic portion and affecting a geometry of one or both of said elastic portion and of said chamber;

wherein, at least when the material is contained within said chamber, said at least one elastic portion is stretched so as to urge a reduction in volume of said chamber by at least 70%;

wherein said at least one elastic portion is under tension when said chamber is empty of material.

2. The device of claim 1, wherein said at least one non-elastic portion is rigid.

6. The device according to claim 2, comprising an outlet from said chamber defined in said at least one elastic portion.

7. The device according to claim 1, comprising an outlet from said chamber defined in said at least one non-elastic portion.

8. The device according to claim 2, further including an outlet disposed on said rigid portion.

9. The device according to claim 8, wherein said chamber applies a compressive force on said material in a direction which is within 20 degrees of a perpendicular to said outlet, when the material is dispensed from said chamber through said outlet.

10. The device according to claim 6, further comprising:

a valve attached at said outlet;

wherein upon opening said valve, material is dispensed from said chamber.

11. The device according to claim 2, wherein said chamber is enclosed by said at least one elastic portion and said at least one rigid portion.

16. The device according to claim 2, wherein said at least one elastic portion conforms to at least most of a chamber wall defined by said at least one rigid portion, when said at least one elastic portion is at a most relaxed state thereof.

17. The device according to claim 16, wherein said elastic portion is not flat when relaxed.

18. The device according to claim 17, wherein said elastic portion is hat-shaped.

19. The device of claim 2, comprising a base on which said device stands;

wherein said at least one elastic portion is configured to expand, when the chamber is filled, in one or more of a direction perpendicular to said base and a direction of said base.

22. The device according to claim 2, wherein said chamber is defined by at least two elastic portions facing each other and wherein said at least one rigid portion maintains a shape of said chamber along at least one dimension thereof.

23. The device according to claim 22, wherein said rigid portion is reinforced.

24. The device according to claim 22, wherein said at least two elastic portions approach each other to less than a distance of 2 mm over at least 50% of their area when said volume is empty.

25. The device according to claim 22, wherein said at least one rigid portion defines a volume for said at least two elastic portions to expand into without extending past a bounding geometry defined by at least one said rigid portion, said volume being at least 3 millimeters in a direction of expansion of at least one of said at least two elastic portions.

26. The device according to claim 22, wherein said at least one rigid portion is provided in two parts which clamp said at least two elastic portions therebetween.

46. The device according to claim 2, wherein said at least one elastic portion has different resistance to stretching in different directions along a wall of said chamber.

47. The device according to claim 2, wherein at least one portion of said at least one elastic portion is non-planar.

48. The device of claim 47, wherein said at least one elastic portion has a varying thickness when at rest.

49. The device of claim 2, wherein a portion of at least one elastic portion is reinforced with a non-expanding element.

50. The device according to claim 2, wherein one or more of said portions includes an impermeable coating.

51. The device according to claim 2, comprising at least one impermeable layer between said material and said at least one elastic portion.

52. The device of claim 1, wherein said non-elastic portion is flexible.

53. The device according to claim 2, wherein said at least one rigid portion maintains a geometry of said chamber along at least one dimension thereof.

54. The device according to claim 2, wherein said chamber is configured to apply a pressure of at least 6 bar.

3-5. -5. (canceled)

12-15. -15. (canceled)

20-21. -21. (canceled)

27-45. -45. (canceled)

55-58. -58. (canceled)

59. A device for dispensing material under pressure, comprising:

at least one elastic portion defining at least one wall of a chamber with a volume for holding said material; and

at least one non-elastic element attached to or embedded within said at least one elastic portion to interfere with extension of said at least one elastic element in at least one direction

wherein said at least one elastic portion is under tension when said chamber is empty of material.