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Title: Soil sampling device with latch assembly having a variable circumferential shape

The invention relates to an improved sampler which can be operated in any orientation. The design features a positive gripping of the operating rod in a manner to reduce point loads so as to reduce any possibility of jamming of the rod on a retraction stroke until such time as it is positively retained in the fully withdrawn position. In the preferred embodiment, a pair of mating cylindrical latch pieces, held together by a circumferential spring, are used for positive actuation. The inner rod has an angular cut-out which provides the base for the latch when aligned with the latch. A release fixture can be used to free the latch from the cone rod after actuation. The latches are formed in such a manner as they may support themselves within the housing of the sampler until they engage the operating rod. 11 figs.
Inventors:
Issue Date:
OSTI Identifier:
415741
Assignee:
SNL; SCA: 540220; PA: EDB-97:016573; SN: 97001714592
Patent Number(s):
US 5,587,540/A/
Application Number:
PAN: 8-491,281
Contract Number:
AC04-76DP00789
Resource Relation:
Other Information: PBD: 24 Dec 1996
Research Org:
AT&T Corporation
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; SAMPLERS; DESIGN; POLLUTANTS; SAMPLING; LAND POLLUTION