Stoves and furnaces – Liquid heater – Open-top vessel that may include lid
Reexamination Certificate
1999-11-03
2001-04-03
Lazarus, Ira S. (Department: 3743)
Stoves and furnaces
Liquid heater
Open-top vessel that may include lid
C239S427000
Reexamination Certificate
active
06209536
ABSTRACT:
INTRODUCTION
The present invention relates to a venturi apparatus for a gas heated deep flyer, and more particularly, to a venturi apparatus having improved mixing characteristics and serviceability.
BACKGROUND
Deep fryers are commercially used by restaurants, institutional kitchens, and fast food establishments for cooking a variety of food products, such as french fries, fish, fried chicken, and the like. The food product is cooked by totally immersing it within a vat or tank that is filled with heated oil or shortening. The shortening may be heated using a flow of heated gas that is forced or drawn through heat exchanger tubes located within the cooking vat.
Prior art venturi fed burners have a venturi typically located directly adjacent, and leading straight into, the burner which heats the gas flowing into the heat exchanger tubes. Such a construction does not provide for extensive mixing of gas and air prior to entry into the burner. This location of the venturi apparatus also makes it difficult to place a filter tub under the vat. Other locations of the venturi apparatus may interfere with sensor connections, block the servicing of fryer components, or impede the operation of valves and switches required to operate the fryer.
It is an object of the present invention to provide a venturi for a deep fryer which reduces or wholly overcomes some or all of the aforesaid difficulties inherent in prior known devices. Particular objects and advantages of the invention will be apparent to those skilled in the art, that is, those who are knowledgeable or experienced in this field of technology, in view of the following disclosure of the invention and detailed description of certain preferred embodiments.
SUMMARY
The principles of the invention may be used to advantage to provide a venturi configuration having improved mixing of gas and air, as well as improved operability and serviceability of a deep fryer.
In accordance with a first aspect, a fryer system has a venturi apparatus for a gas fired deep flyer system including a vat containing at least one heat exchange tube and a gas supply port. A venturi is connected at a first end thereof to the gas supply port. A nozzle is located proximate a first end of one of the at least one heat exchange tubes. The fryer system has at least three 90° elbows. Each elbow has a first outlet and a second outlet. A first 90° elbow is connected at its first outlet to the venturi and at its second outlet to a length of conduit. A last 90° elbow is connected at its first outlet to a length of conduit and at its second outlet to the nozzle. Each 90° elbow is connected to each adjacent 90° elbow by a length of conduit.
In accordance with another aspect, a venturi apparatus for a gas fired deep fryer includes a vat containing at least one heat exchange tube and a gas supply port. A venturi is connected at a first end thereof to the gas supply port. A first length of conduit is connected to a second end of the venturi by a first 90° elbow. A second length of conduit is connected to the first length of conduit by a second 90° elbow. A nozzle is proximate a first end of one of the at least one heat exchange tubes and is connected to the second length of conduit by a third 90° elbow.
From the foregoing disclosure, it will be readily apparent to those skilled in the art, that is, those who are knowledgeable or experienced in this area of technology, that the present invention provides a significant technological advance. Preferred embodiments of the invention can provide improved gas and air mixing as well as improved operability and serviceability in a deep fryer. These and additional features and advantages of the invention disclosed here will be further understood from the following detailed disclosure of certain preferred embodiments.
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Product specification sheet for Imperial “Elite 40 lb. Fryer,” model # IFS-50, Imperial Commercial Cooking Equipment, Duarte, CA.
Product specification sheet for Pitco Prialator “Advanced Gas Fryer System,” model AG14S-C/FD-SS, Pitco Prialator, Inc., Concord, NH.
Product specification sheet for Vulcan “TK Fryer Family,” models TK35, TK45 and TK65, Vulcan-Hart Co., Louisville, KY (1997).
Banner & Witcoff , Ltd.
Clarke Sara
Lazarus Ira S.
Ultrafryer Systems, Inc.
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