Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1995-01-17
1997-01-21
Noland, Thomas P.
Measuring and testing
Sampler, sample handling, etc.
Capture device
7386381, 7386382, 73 2333, G01N 122
Patent
active
055961550
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to sampling probes and, in particular but not exclusively, to probes for use for gaseous products, for example, in sampling the exhaust gases of engines.
Road vehicle exhaust gases need to be sampled to establish whether they comply with requirements that they be clean, but to gain access to the exhaust outlet for such gases is not always easy. This is particularly the case with goods vehicles.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a sampling probe by which samples of gaseous products may be taken from relatively inaccessible outlet positions.
According to the invention a sampling probe for gaseous products comprises a sampling tube having an inlet for gaseous products at one end, an arm for supporting the tube and having an inner and an outer end, pivot means between the tube and the arm, and located towards the outer end of the arm so that the tube is pivotable relative to the arm to manipulate the position of the sampling tube inlet by relative movement between the arm and the tube, said inlet being located outwardly of said pivot means.
Preferably the probe includes clamping means located towards the outer end of the arm whereby the probe is clamped to an outlet for gaseous products to be sampled.
Conveniently the clamping means is operable remotely from said outer end of the arm by operating means and said operating means is located adjacent a handle at said inner end of same arm.
The clamping means may include clamping surfaces resiliently urged towards one another, the surfaces being movable apart by said operating means.
In sampling the exhaust gases of vehicles the sampling tube is connected to measuring means whereby the smoke content of the gaseous products is measured.
Conveniently the sampling tube includes a flexible portion located inwardly of the pivot means and a rigid portion associated with the pivot means whereby the inlet end of the tube is movable relative to the arm.
Preferably the pivot means and the clamping means form part of the same unit.
In one arrangement the length of said rigid portion, the location of said tube inlet, the position of said pivot means and the length of the arm are arranged to enable the inlet end to be inserted into a tubular exhaust member through which the gaseous products are discharged and in which said products are sampled by admission to said inlet end for passage along the tube to measuring means, the tubular member being clampable to said arm.
BRIEF DESCRIPTION OF THE DRAWING
Further features of the invention will appear from the following description of an embodiment given by way of example only and with reference to the accompanying drawing, which shows a side elevation of a sampling probe assembly.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
In the illustrated arrangement the sampling probe is intended to sample the exhaust gases of internal combustion engines to establish the smoke content of the gases. Analysis of the smoke content is conducted in a sampling device 10, the detailed construction of which does not form part of the present invention but may be of the kind described in our British patent application No. 9214110.0
The sampling device 10 is provided with an exhaust gas sample through a sampling tube 11 having an inlet end 12 formed at one end of a rigidly constructed portion 13. A flexibly constructed portion 14 communicates with the portion 13 and with a further rigid portion 15 which, in turn, communicates with the sampling device 10.
There is also provided an arm 17 having a handle 18 at one end, a rigid tube 19 extending from the handle 18 and at the end of the tube 19 remote from the handle 18 is provided a clamping device 20 and a pivot 21. As shown in the drawing the pivot 21 is secured to the rigid part 13 of the tube 11 at a position spaced from the inlet end 12 of the sampling tube 11. By provision of the pivot 21 the tube part 13 may pivot about an axis X transverse to the longitudinal axis of the part 13 and relative to the arm 17
REFERENCES:
patent: 2648976 (1953-08-01), Bur
patent: 2935866 (1960-05-01), Schmidt et al.
patent: 3381409 (1968-05-01), Lamont
patent: 3382721 (1968-05-01), Tinkham et al.
patent: 3481200 (1969-12-01), Ludecke et al.
patent: 3638500 (1972-02-01), Wetzel
patent: 4140006 (1979-02-01), d'Auzac et al.
patent: 5146796 (1992-09-01), Mailliet et al.
Noland Thomas P.
V.L. Churchill Ltd.
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