Interstitial gas probe
First Claim
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1. A probe for use in withdrawing subsurface soil gas samples, said probe comprising:
- an elongated shaft capable of being driven into the soil, said elongated shaft including a passage for removal of subsurface soil gas samples;
a probe tip assembly, including a sealing surface, mounted at a first end of said passage;
sealing means disposed within said passage; and
actuating means at a second end of said passage for selectively enabling said sealing means to engage said sealing surface.
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Abstract
A sample probe for obtaining relatively small subsurface gas samples for analysis during geo-chemical exploration. The probe is comprised of a long slender shaft capable of being driven into the soil and a hammer assembly which mounts to the shaft and is utilized to drive and remove the shaft. The shaft includes a passage for removal of interstitial gas and the passage may be mechanically sealed or opened while the probe is in place in the soil. The probe shaft also includes temperature, soil humidity and soil pH sensors which are utilized to obtain additional parameters to be considered during analysis of the gas samples.
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Citations
18 Claims
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1. A probe for use in withdrawing subsurface soil gas samples, said probe comprising:
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an elongated shaft capable of being driven into the soil, said elongated shaft including a passage for removal of subsurface soil gas samples; a probe tip assembly, including a sealing surface, mounted at a first end of said passage; sealing means disposed within said passage; and actuating means at a second end of said passage for selectively enabling said sealing means to engage said sealing surface. - View Dependent Claims (2, 3, 4)
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5. A probe for use in withdrawing subsurface soil gas samples, said probe comprising:
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an elongated shaft capable of being driven into the soil, said elongated shaft including a passage for removal of subsurface gas samples; a probe tip assembly mounted at a first end of said passage, said probe tip assembly including a concave sealing surface disposed at the uppermost surface of said probe tip assembly; an elongated sealing member disposed within said passage and having a substantially spherical surface at the lower end thereof; and actuating means disposed at the upper end of said elongated sealing member for selectively urging said substantially spherical surface into engagement with said concave sealing surface. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A probe for use in withdrawing subsurface soil gas samples, said probe comprising:
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an elongated shaft capable of being driven into the soil, said elongated shaft including a passage for removal of subsurface gas samples; a probe tip assembly mounted at a first end of said passage, said probe tip assembly including a substantially pointed penetrating member, a first gas passage disposed transversely above said substantially pointed penetrating member and a second gas passage connecting said first gas passage and a concave sealing surface disposed at the uppermost surface of said probe tip assembly; an elongated sealing member disposed within said passage and having a substantially spherical surface at the lower end thereof; and actuating means disposed at the upper end of said elongated sealing member for selectively urging said substantially spherical surface into engagement with said concave sealing surface. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification