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US 5,348,393 AGranted
Safety guard system for food mixer
AssigneeUnivex Corporation
InventorPhillip M. Pappas, Jr.
Life of this patent
Estimating the term…
Abstract
A food mixer includes a dual mount sensor arrangement which prevents operation of the mixer unless a protective safety guard is secured to the mounts. Each mount is physically spaced from each other so that a user must take extraordinary, and deliberate measures to circumvent the safety feature. The dual mount arrangement may be used in conjunction with a bowl lowering shut-off feature for disabling the mixer when the mixing bowl is lowered to a position where the user's safety is at risk.
Claims14
A food mixer, comprising:
- a housing;
- a drive train enclosure mounted to and extending from an upper portion of the housing;
- a removable bowl for holding ingredients to be blended;
- a bowl support to support the removable bowl below the drive train enclosure:
- a motor;
- at least two mounts positioned on the housing more than a hand width apart from each other so that said two mounts cannot be contacted simultaneously by the same hand;
- a detachable protective guard, positioned between the drive train enclosure and the removable bowl, the guard having a structure for blocking hand access to said bowl when supported within the bowl support, and having at least two support members each arranged to engage an associated one of said mounts such that the guard is cantilevered from said mounts over said bowl, said protective guard being capable of manual detachment from said mounts solely by manipulating the detachable guard itself;
- a mixing attachment driven by said motor, said attachment extending downward from the drive train enclosure, through said protective guard, and into the removable bowl to blend the ingredients in the bowl;
- at least two sensors, each sensor associated with a respective one of said at least two mounts, to detect the engagement of said support members and said mounts;
- and
- a controller responsive to said sensors for deactivating said motor when either of said support members is disengaged from the associated one of said mounts.
8 more elements
A food mixer, comprising:
- a housing;
- a drive train enclosure mounted to and extending from an upper portion of the housing;
- a removable bowl for holding ingredients to be blended;
- a bowl support to support the removable bowl below the drive train enclosure;
- a motor;
- at least two mounts positioned on the housing more than a hand width apart from each other so that said two mounts cannot be contacted simultaneously by the same hand;
- a detachable protective guard, positioned between the drive train enclosure and the removable bowl, the guard having a structure for blocking hand access to said container when supported within the bowl support and having at least two support members each arranged to engage an associated one of said mounts such that the guard is cantilevered from said mounts over said bowl, said protective guard being capable of manual detachment from said mounts solely by manipulating the detachable guard itself;
- a mixing attachment driven by said motor, said attachment extending downward from the drive train enclosure, through said protective guard, and into the removable bowl to blend the ingredients in the bowl;
- independent first and second means for detecting the engagement of said pair of support members and said mounts, respectively;
- means for changing the relative spacing between said bowl and said protective guard such that with a first spacing a user is denied hand access to said mixing attachment;
- third means independent from said first and second means for detecting that said relative spacing is said first spacing;
- and
- a controller responsive to said first, second and third means to deactivate said motor when either of said support members is disengaged from said mounts or when said relative spacing is not said first spacing.
10 more elements
A food mixer, comprising:
- a housing;
- a drive train enclosure mounted to and extending from an upper portion of the housing;
- a removable bowl for holding ingredients to be blended;
- a bowl support to support the removable bowl below the drive train enclosure;
- a motor;
- at least two mounts positioned on the housing more than a hand width apart from each other so that said two mounts cannot be contacted simultaneously by the same hand
- a detachable protective guard, positioned between the drive train enclosure and the removable bowl, the guard having a structure for blocking hand access to said bowl when supported within the housing, having at least two support members each arranged to engage an associated one of said mounts such that the guard is cantilevered from said mounts over said container, said protective guard being capable of manual detachment from said mounts solely by manipulating the detachable guard itself;
- a mixing attachment driven by said motor, said attachment extending downward from the drive train enclosure, through said protective guard, and into the removable bowl to blend the ingredients in the bowl;
- a first sensor, associated with a first one of said pair of mounts, to detect the engagement of a first one of said support members and said mount;
- and
- a second sensor, associated with a second one of said pair of mounts, to detect the presence of a second one of said support members in said mount to support said guard on said housing in position over said bowl;
- means for changing the relative spacing between said bowl and said protective guard such that with a first spacing a user is denied access to said mixing attachment;
- a third sensor to detect that said relative spacing is said first spacing;
- said first, second and third sensors each being independent of the other two sensors, and
- a controller responsive to said first, second and third sensors to deactivate said motor when either of said pair of support members is disengaged from said mounts or when said relative spacing is not said first spacing.
12 more elements
Dependencies are inferred from the claim text.