Pressure transducer

Details Pressure transducer Pressure transducer

1980-08-11

1983-01-25

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

With pressure and/or temperature compensation

73706, 73726, 338 4, G01L 904, G01L 1904

Patent

active

043696597

ABSTRACT:
The melt pressure transducer is preferably for use in pressure measurements associated with an injection molding machine, and is designed to be mounted inside a mold to measure cavity pressure directly. In addition to being small in size, the transducer is also adapted for high cycle life. The transducer utilizes an internal filler rod for temperature compensation and, also, to reduce liquid volume rather than a capillary. The strain gauges are secured to opposing flats of the housing to provide a pressure-ranged section. The housing is in the form of a thick-walled cylinder with the flats forming the sensitive areas. Further, a unique fill and seal technique is described for charging the transducer and, at the same time, pre-stressing the coupling diaphragm.

REFERENCES:
patent: 1832380 (1931-11-01), Goldman
patent: 1898257 (1933-02-01), Nelson
patent: 3128628 (1964-04-01), Lebow
patent: 3349623 (1967-10-01), Pastan
patent: 3645136 (1972-02-01), Calhoun
patent: 3697919 (1972-10-01), Orth et al.
patent: 4111056 (1978-09-01), Mastromatteo

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