Pop-up temperature indicating device

Details Pop-up temperature indicating device Pop-up temperature indicating device

1997-12-24

1999-11-23

Miska, Vit

Signals and indicators

Indicators

Temperature responsive or compensating means

374155, 374160, G01K 1106, G01K 102

Patent

active

059881020

ABSTRACT:
A pop-up thermometer having an elongate housing formed with a longitudinally extending bore, a plurality of internal neck regions, and a plurality of internal cavities. The neck regions each having a minimum diameter portion and a neck locking surface extending outwardly from the minimum diameter portion of the neck. An indicator rod slidably disposed in the bore of the housing includes at least one stem stretch having a diameter less than the remainder of the bore and a stem locking surface extending outwardly from said stem stretch. A fusible material fills the internal cavities. When the fusible material is in solid form, the neck locking surface exerts a substantially downward directed force on said stem locking surface on the rod to resist upward movement of the rod relative to the housing.

REFERENCES:
patent: 3559615 (1971-02-01), Kliewer
patent: 3682130 (1972-08-01), Jeffers
patent: 3693579 (1972-09-01), Kliewer
patent: 3713416 (1973-01-01), Volk
patent: 3759103 (1973-09-01), Volk
patent: 4082000 (1978-04-01), Volk
patent: 4289088 (1981-09-01), Scibelli
patent: 4421053 (1983-12-01), Volk
patent: 4748931 (1988-06-01), Volk
patent: 5323730 (1994-06-01), Ou-Yang
patent: 5487352 (1996-01-01), Williams et al.
patent: 5537950 (1996-07-01), Ou-Yang

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