Foods and beverages: apparatus – Cooking – With signal – indicator or tester
Patent
1997-07-24
1998-12-22
Simone, Timothy F.
Foods and beverages: apparatus
Cooking
With signal, indicator or tester
73706, 73715, 99492, 220316, A47J 2700, A47J 27092
Patent
active
058507787
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a pressure indicator for a cooking utensil or the like, for example a steam-pressure cooker, having an indicator pin. More specifically, the indicator pin is arranged longitudinally movably in a holding piece, the holding piece is assembled out of a fastening piece, a pipe section projecting from the fastening piece, and a front piece closing off the pipe section. The indicator pin consists of a shaft and a control flange and is supported in a front wall in the fastening piece, which front wall serves as the outer stop, and furthermore is received in the front piece in a rear front wall serving as the inner stop. The front walls have openings, which are either closed off by the contacting control flange or not influenced by the control flange. The rear front wall is designed elastically and the inner stop can be overcome in both directions by the control flange and a stroke limiter for the control flange is provided on the front piece.
BACKGROUND OF THE INVENTION
Such a pressure indicator is known, for example, from DE-A-30 27 057. This pressure indicator is merely capable of indicating whether an excess pressure exists in the cooker or whether the cooker is without pressure. However, this conventional safety valve is not suited as a pressure indicator, which can be used for cooking.
Furthermore, pressure indicators are needed to indicate how high the pressure presently is in the steam-pressure cooker. Such a pressure indicator has, in a conventional manner, an indicator pin in a hole in the utensil wall of the cooking utensil, in particular in the lid, which indicator pin can be axially adjusted against a restoring force, whereby the indicator pin can be moved such that it is driven out of the cooking utensil upon an increase in the pressure so that the length of the indicator pin above the utensil wall indicates the pressure in the cooking utensil.
Pressure indicators of this general type have been known for a long time and are extensively used. Several mostly colored grooves are, as a rule, provided on the indicator pin, which grooves are, if necessary, associated with varying restoring forces, and which grooves are used to observe the pressure. Such a pressure indicator consists of several metallic individual parts and associated rubber-elastic sealing elements. Even though the metal parts are, aside from the restoring spring, turned parts, which can be manufactured by machining in automated machines, the expense of the manufacture and the assembly of such a pressure indicator is considerable. The metal parts must be physiologically safe and must consist of a suitable, mostly surface-refined material so that the cost of the manufacture of the pressure indicator is further increased.
These pressure indicators are not only used to indicate the pressure inside of the cooking utensil but, to a certain degree, also to make the cooking utensil secure by indicating a non-permissible exceeding of pressure during the cooking operation. Venting is also desired at the start of operating the cooking utensil in order to replace the air above the material to be cooked with steam until the operating pressure of the cooking utensil is approximately achieved.
The conventional pressure indicators are mostly installed in a safety valve and are difficult to clean and to service. In most cases, they must be disassembled into their individual parts for these purposes, fitting tools and mechanical skills are needed.
SUMMARY OF THE INVENTION
The purpose of the invention is to provide a pressure indicator of the type described in detail above which is less expensive and is constructed very simply and is user friendly.
The purpose is attained according to the invention in such a manner that the indicator pin is arranged in a holding piece, furthermore the holding piece is assembled as a fastening piece, a longitudinally elastic pipe section projecting from said fastening piece, and a front piece closing off the pipe section. Furthermore, the indicator pin consists of a shaf
REFERENCES:
patent: 3494198 (1970-02-01), Kaminky et al.
patent: 3683703 (1972-08-01), Lilljeforss
patent: 3818819 (1974-06-01), Shulz et al.
patent: 3823657 (1974-07-01), Luetolf
patent: 4169388 (1979-10-01), Teitelbaum et al.
patent: 4433579 (1984-02-01), Horn
patent: 4685336 (1987-08-01), Lee
patent: 4911068 (1990-03-01), Koether et al.
patent: 4932550 (1990-06-01), Moucha
Heinrich Baumgarten KG
Simone Timothy F.
LandOfFree
Pressure indicator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressure indicator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure indicator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2037975