Gas flux system chamber design and positioning method

• US 7,509,836 B2
• Filed: 09/01/2005
• Issued: 03/31/2009
• Est. Priority Date: 09/01/2005
• Status: Active Grant

• Current Assignee: Li & S Company Limited (Yesco Holdings Co., Ltd.)
• Original Assignee: Li & S Company Limited (Yesco Holdings Co., Ltd.)
• Inventors: Johnson, Mark A., Ragatz, Andrew G., Peterson, Rex A.
• Primary Examiner(s): Williams; Hezron
• Assistant Examiner(s): MILLER, ROSE MARY
• Application Number:
  US11/217,922
• Publication Number:
  US 20070044538A1
• Time in Patent Office: 1,307 Days
• Field of Search: None
• US Class Current: 73/19.01
• CPC Class Codes: G01N 1/2294 Sampling soil gases or the like

Abstract

A gas flux chamber assembly with a soil collar and a chamber is provided. The chamber is moved between first and second positions, wherein the chamber is positioned on the soil collar in the first position and is positioned outside of an area above the soil collar in the second position. In operation, the chamber is first lifted off of the soil collar and is then rotated, about a rotational axis substantially parallel to the soil collar axis, outside of the area above the soil collar. These acts are reversed to move the chamber from the second position to the first position.

Claims

1. A gas flux chamber assembly comprising:

a soil collar;

a chamber; and

a lift-and-rotate mechanism coupled with the chamber and comprising a rotational axis substantially parallel to the soil collar, wherein the lift-and-rotate mechanism is operative to move the chamber between first and second positions, wherein the chamber is positioned on the soil collar in the first position and is positioned outside of an area above the soil collar in the second position, wherein the lift-and-rotate mechanism moves the chamber from the first position to the second position by lifting the chamber off of the soil collar and then rotating the chamber, about the rotational axis, outside of the area above the soil collar.

2. The invention of claim 1, wherein the lift-and-rotate mechanism comprises:

a first cylindrical column comprising a hole;

a second annular cylindrical column installed around the first cylindrical column, wherein the second cylindrical column comprises a helical slot;

a third annular cylindrical column installed around the second cylindrical column, the third cylindrical column comprising an L-shaped slot; and

a pin passing through the L-shaped slot, helical slot, and hole.

3. The invention of claim 2, wherein the helical slot comprises two different lead angles, one of which is engaged by the pin during lift, and the other of which is engaged during rotation.

4. The invention of claim 2, wherein the second annular cylindrical column comprises a first pulley, and wherein the lift-and-rotate mechanism further comprises:

a motor;

a second pulley coupled with the motor; and

a belt coupling the first pulley and the second pulley.

5. The invention of claim 2, wherein the second and third annular cylindrical columns are fixed during lift and rotate motions and the first cylindrical column performs the lift and rotate motions.

6. The invention of claim 2, wherein the first cylindrical column is fixed during lift and rotate motions and the second and third annular cylindrical columns perform the lift and rotate motions.

7. The invention of claim 1, wherein the lift-and-rotate mechanism comprises a linear actuator and a cylinder with a helical slot.

8. The invention of claim 1 further comprising:

a spring disk coupled with the chamber;

a chamber support structure coupled with the lift-and-rotate mechanism; and

a plurality of springs coupling the spring disk with the chamber support structure.

9. The invention of claim 1 further comprising a collar seal located between the soil collar and the chamber when the chamber is in the first position.

10. The invention of claim 1, wherein the lift-and-rotate mechanism comprises pneumatic actuation.

11. The invention of claim 1, wherein the lift-and-rotate mechanism comprises hydraulic actuation.

12. The invention of claim 1, wherein the lift-and-rotate mechanism comprises a chain drive.

13. The invention of claim 1, wherein the lift-and-rotate mechanism comprises a v-belt drive.

14. A gas flux chamber assembly comprising:

a soil collar;

a chamber; and

means for moving the chamber from a first position where the chamber is positioned on the soil collar to a second position where the chamber is positioned outside of an area above the soil collar by lifting the chamber off of the soil collar and then rotating the chamber about a rotational axis substantially parallel to the soil collar outside of the area above the soil collar.

15. The invention of claim 14, wherein the means for moving comprises a lift-and-rotate mechanism.

16. The invention of claim 15, wherein the means for moving comprises:

a first cylindrical column comprising a hole;

a second annular cylindrical column installed around the first cylindrical column, wherein the second cylindrical column comprises a helical slot;

a third annular cylindrical column installed around the second cylindrical column, the third cylindrical column comprising an L-shaped slot; and

a pin passing through the L-shaped slot, helical slot, and hole.

17. The invention of claim 16, wherein the helical slot comprises two different lead angles, one of which is engaged by the pin during lift, and the other of which is engaged during rotation.

18. The invention of claim 16, wherein the second annular cylindrical column comprises a first pulley, and wherein the means for moving further comprises:

a motor;

a second pulley coupled with the motor; and

a belt coupling the first pulley and the second pulley.

19. The invention of claim 16, wherein the second and third annular cylindrical columns are fixed during lift and rotate motions and the first cylindrical column performs the lift and rotate motions.

20. The invention of claim 16, wherein the first cylindrical column is fixed during lift and rotate motions and the second and third annular cylindrical columns perform the lift and rotate motions.

21. The invention of claim 14, wherein the means for moving comprises a linear actuator and a cylinder with a helical slot.

22. The invention of claim 14 further comprising:

a spring disk coupled with the chamber;

a chamber support structure coupled with the means for moving; and

a plurality of springs coupling the spring disk with the chamber support structure.

23. The invention of claim 14 further comprising a collar seal located between the soil collar and the chamber when the chamber is in the first position.

24. The invention of claim 14, wherein the means for moving comprises pneumatic actuation.

25. The invention of claim 14, wherein the means for moving comprises hydraulic actuation.

26. The invention of claim 14, wherein the means for moving comprises a chain drive.

27. The invention of claim 14, wherein the means for moving comprises a v-belt drive.

28. A method for use with a gas flux chamber assembly comprising a soil collar and a chamber, the method comprising:

(a) providing a gas flux chamber assembly comprising a soil collar and a chamber with the chamber positioned on the soil collar;

(b) lifting the chamber off of the soil collar; and

(c) rotating the chamber, about a rotational axis substantially parallel to the soil collar, outside of an area above the soil collar.

29. The invention of claim 28, wherein (b) and (c) are performed by a lift-and-rotate mechanism.

30. The invention of claim 29, wherein the lift-and-rotate mechanism comprises:

a first cylindrical column comprising a hole;

a second annular cylindrical column installed around the first cylindrical column, wherein the second cylindrical column comprises a helical slot;

a third annular cylindrical column installed around the second cylindrical column, the third cylindrical column comprising an L-shaped slot; and

a pin passing through the L-shaped slot, helical slot, and hole.

31. The invention of claim 30, wherein the helical slot comprises two different lead angles, one of which is engaged by the pin during lift, and the other of which is engaged during rotation.

32. The invention of claim 30, wherein the second annular cylindrical column comprises a first pulley, and wherein the lift-and-rotate mechanism further comprises:

a motor;

a second pulley coupled with the motor; and

a belt coupling the first pulley and the second pulley.

33. The invention of claim 30, wherein the second and third annular cylindrical columns are fixed during (b) and (c), and wherein the first cylindrical column performs (b) and (c).

34. The invention of claim 30, wherein the first cylindrical column is fixed during (b) and (c), and wherein the second and third annular cylindrical columns perform (b) and (c).

35. The invention of claim 29, wherein the lift-and-rotate mechanism comprises a linear actuator and a cylinder with a helical slot.

36. The invention of claim 29, wherein the gas flux chamber assembly further comprises:

a spring disk coupled with the chamber;

a chamber support structure coupled with the lift-and-rotate mechanism; and

a plurality of springs coupling the spring disk with the chamber support structure.

37. The invention of claim 29, wherein the lift-and-rotate mechanism comprises pneumatic actuation.

38. The invention of claim 29, wherein the lift-and-rotate mechanism comprises hydraulic actuation.

40. The invention of claim 29, wherein the lift-and-rotate mechanism comprises a v-belt drive.

41. The invention of claim 28, wherein the gas flux chamber assembly further comprises a collar seal located between the soil collar and the chamber when the chamber is on the soil collar.

39. The invention of 29, wherein the lift-and-rotate mechanism comprises a chain drive.