U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Variable-length sampling device

Patent 4359110 Issued on November 16, 1982. Estimated Expiration Date: Icon_subject September 22, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

855849

1078847

2454952

2681795

2688877

2896444

3085636

3091968

Inventor

Application

No. 06/189038 filed on 09/22/1980

US Classes:

175/20, Combined with earth removal (e.g., removing sample)73/864.64Side opening

Examiners

Primary: Leppink, James A.
Assistant: Suchfield, George A.

Attorney, Agent or Firm

International Classes

E21B 11/00 (20060101)
E21B 7/00 (20060101)
E21B 49/02 (20060101)
E21B 7/26 (20060101)
E21B 49/00 (20060101)

Abstract

A device for obtaining a plurality of samples from mineral deposits such as placer deposits in order to discover the presence of valuable metals comprises an elongated tubular member in which is rotatably positioned an elongated cylindrical storage member, the tubular member including sets of windows along its length and the cylindrical storage member including compartments capable of alignment with the sets of windows upon rotation of the storage member relative to the tubular member. Spring-like tooth members mounted in the compartments are capable of extending through the windows of the tubular member to help the movement of deposit material therethrough. The sampling device may also include one or more extension sections, each extension section including a tubular element in which is rotatably positioned a cylindrical storage element, each respective element being similarly constructed to the noted tubular and cylindrical storage members, all the cylindrical storage elements in the extension sections being positively rotatably interconnected with each other and with the cylindrical storage member.

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