Sample tap apparatus with pressure sensituve cap

Fluent material handling – with receiver or receiver coacting mea – Filling means with receiver or receiver coacting means – With receiver support – guide means – or shield

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141 94, 141383, 138 89, 22020322, 220316, 7386386, 7386451, G01N 1100

Patent

active

055753175

ABSTRACT:
A tap to a process fluid line includes a pressure sensitive cap. The force necessary to remove the cap on the tap is directly proportional to the pressure buildup inside the cap so that an operator can take safety measures before removing the cap. The tap includes a base having a first set of reusable threads thereon and a cap having a second set of reusable threads therein which engage with the first set of threads on the base. A hollow fill tube communicates fluid from the process fluid line through a ball valve to a sample bottle when the cap is removed. The resistance provided by the reusable threads is linear and consistent throughout the entire threading and unthreading procedure. In this manner the force necessary to remove the cap is proportional to the pressure buildup inside of the cap. A helical spring is attachable by an anchor to the fill tube and can be employed to steady the mouth of the sample bottle as it is filled by the fill tube. The invention helps to prevent industrial accidents by minimizing the hazard of sample fluid spills and by warning the operator of the buildup of dangerous pressure inside the cap prior to its removal.

REFERENCES:
patent: 987518 (1911-03-01), Wendling
patent: 1363480 (1920-12-01), Murphy
patent: 1515026 (1924-11-01), Frauenfelder
patent: 2866473 (1958-12-01), Schutter
patent: 3451589 (1969-06-01), Lee
patent: 3893487 (1975-07-01), Engelking
patent: 4444331 (1984-04-01), Lankston
patent: 4534494 (1985-08-01), Hautiemont
patent: 4665960 (1987-05-01), Brzezicki et al.
patent: 5095958 (1976-03-01), Tincati
patent: 5127276 (1992-07-01), Prentiss
patent: 5209456 (1993-05-01), Chronister
patent: 5408890 (1995-04-01), Klaus
patent: 5442968 (1995-08-01), Westlake, III et al.
patent: 5452819 (1995-09-01), Vance

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