Abstract Disclosed is a probe for use in obtaining gas samples from around subsurface conduit systems. The probe has an elongate body with a chamber extending through the length of said body. A threaded reduced diameter portion is formed on the rearmost end of the body for use in attaching the probe to a length of conduit. A shoulder is formed adjacent to the threaded portion and has a diameter slightly larger than the conduit to which the probe is attached. The shoulder is adjacent to an enlarged portion with an arcuate periphery. A reduced diameter portion is formed adjacent to the enlarged portion. A plurality of bores extend through the reduced diameter portion from various directions and communicate with the axial chamber in the body. A bulbous portion is formed on the forwardmost end of the probe adjacent to the reduced diameter portion.
A gas probe for attachment to a conduit for inserting in a pre-existing hole to obtain gas samples from the vicinity of a buried gas system comprising: an elongate body of a size to fit in said hole; means on one end of said body for attaching said body to the conduit to communicate with said probe when said probe is inserted in said hole; two enlarged portions on said body positioned on either side of a reduced diameter portion, said enlarged portions having arcuate peripheral surfaces thereon for engaging the walls of said hole during insertion and removal of the probe from said hole whereby said probe is centered in said hole and said enlarged portions act as guides to reduce lodging of soil in the sampling bores in the body; a chamber in said body for communication with the conduit; said reduced diameter portion having sampling bores formed therein communicating with said chamber; and a sampling bore formed in said body on the end opposite said one end and communicating with said chamber.
Claim 2
Dependent Claim
175 words
A gas probe for attachment to a conduit for inserting in a pre-existing hole to obtain gas samples from the vicinity of a buried gas system comprising: an elongate body of a size to fit in said hole; means on one end of said body for attaching said body to the conduit to communicate with said probe when said probe is inserted in said hole; two enlarged portions on said body positioned on either side of a reduced diameter portion, said enlarged portions having arcuate peripheral surfaces thereon for engaging the walls of said hole during insertion and removal of the probe from said hole whereby said probe is centered in said hole and said enlarged portions act as guides to reduce lodging of soil in the sampling bores in the body; a chamber in said body for communication with the conduit; said reduced diameter portion having sampling bores formed therein communicating with said chamber; and a sampling bore formed in said body on the end opposite said one end and communicating with said chamber.
Claim 3
Dependent Claim
17 words
The probe of claim 1 wherein said means for attaching conduit comprises threads on said one end.