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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any possibility of jamming of the rod on a retraction stroke until such time as it is positively retained in the fully withdrawn position.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.
  1. (13501 Witcher NE., Albuquerque, NM 87112)
Issue Date:
OSTI Identifier:
Meyer, Robert D. (13501 Witcher NE., Albuquerque, NM 87112) SNL
Patent Number(s):
US 5587540
Contract Number:
Research Org:
Country of Publication:
United States
soil; sampling; device; latch; assembly; variable; circumferential; shape; relates; improved; sampler; operated; orientation; design; features; positive; gripping; operating; rod; manner; reduce; loads; possibility; jamming; retraction; stroke; time; positively; retained; withdrawn; position; preferred; embodiment; pair; mating; cylindrical; pieces; held; spring; actuation; inner; angular; cut-out; provides; base; aligned; release; fixture; free; cone; latches; formed; support; housing; engage; soil sampling; latch assembly; sampling device; preferred embodiment; design features; operating rod; withdrawn position; inner rod; improved sample; /73/175/