대표
청구항
▼
1. A regulation and control device for pressure cookers which, being specially designed for cookers with bayonet type closures, to whose body and lid respective semi-handles are connected, projecting sideways, which are coupled on closing and separated on opening, the top handle including an adjustable valve unit and a safety element which strains the joint made between the body and the lid when it is opened, characterized in that the valve unit, comprising basically a bracket with two sectors with different diameters, forming a stepping through which it...
1. A regulation and control device for pressure cookers which, being specially designed for cookers with bayonet type closures, to whose body and lid respective semi-handles are connected, projecting sideways, which are coupled on closing and separated on opening, the top handle including an adjustable valve unit and a safety element which strains the joint made between the body and the lid when it is opened, characterized in that the valve unit, comprising basically a bracket with two sectors with different diameters, forming a stepping through which its top half is coupled to the mouth of the hole in the lid, while its bottom threaded half holds a locknut. Said bracket has a radial fin in its top half through which, with the aid of a screw, it is fixed to the head of the top handle, whereas the locknut which actually forms part of the valve has an annular spherical seat in a narrow bottom part, for an axial sealing plunger which crosses the bracket, and which includes a seat with respect to the above, said plunger thus forming an annular chamber with regard to the bracket and immediately above its seat, said annular chamber being communicated by a steam outlet nozzle placed between the head of the handle and the lid, opposite the arm of the former, with the particularity that this plunger is projected against the nut by a spring arranged between a stepping in it and the partially restricted opening of a bushing mounted and sliding inside the bracket, to be exact, in its top or outer half. 2. A regulation and control device for pressure cookers, according to claim 1, characterized in that the said bushing includes two diametrically opposed radial projections which move in vertical grooves made in the bracket and which pass the latter, forming two areas which the arms of a fork touch, which in their bottom edge have a stepped profile, of decreasing depth, so that the longitudinal displacement of the said fork leads to the intermittent movement of the bushing, with the consequent and also staggered shortening of the spring, thereby obtaining different degrees of tension according to the different pressures which the valve has to withstand, said fork being designed to be co-driven by an outer lever placed on the top handle, near its head, with an eccentric placed between, which transforms the swivel movement of said lever into the lengthwise movement of the fork. 3. A regulation and control device for pressure cookers, according to claim 1, characterized in that in the end of the arm of the top handle, corresponding to its head, with regard to the drive lever, there is a blocking element, suitably housed in a vertical groove, which has a top head capable of adopting three positions with respect to the lever-eccentric assembly, as follows: an intermediate position, corresponding to the closed situation, in which the said lever can turn freely to regulate the limit pressure of the cooker; a lower position, corresponding to the open situation, in which the head of the blocking element prevents the lever turning, thanks to a stop connected to the eccentric and which, with the change of state of the lever, touches the head of the blocking element; and a third position, in which the said blocking element occupies a bottom end position, necessary to start opening the cooker and which can only be reached when the lever is in the "O" position, corresponding to the open situation, and in which the element of the blocking head reaches the bottom base of the lever. 4. A regulation and control device for pressure cookers, according to claim 1, characterized in that the blocking element has an outer side extension, forming an inclined plane, which the safety shank touches, permanently subject to strain by a spring and also provided with an inclined plane, combined with the previous one, it being foreseen that the height of the said blocking element be determined by the separation of the two handles, in which case it adopts the bottom end position, through a ramp in the bottom handle and which the bottom end of the blocking element touches on closing, rising until it reaches its bottom end position, and by a housing also existing in the bottom handle, immediately after the said ramp, in which the end of the blocking element fits, in the closed situation, adopting its intermediate position, in which the pressure regulation lever is free. 5. A regulation and control device for pressure cookers, according to claim 1, characterized in that the said safety shank, immediately after the inclined plane touching the blocking element, stretches into side arms which frame the said element and which, when the latter moves downwards, are projected by the spring which assists the said shank, so that its front touches the sealing gasket of the cooker, causing it to be strained on opening. 6. A regulation and control device for pressure cookers, according to claim 1, characterized essentially in that the blocking device is defined through a single part in which a cylindrical neck is defined for it to be correctly guided axially in a housing made operatively in the top semi-handle, said part including a bottom arm to control it through a groove made in the bottom semi-handle, a front shank touching the sealing gasket which links the body with the lid and a top arm assisted by a cam linked to the actual axis of the drive lever, it being foreseen that the channel made in the bottom semi-handle be virtually the same width as the bottom arm of the blocking part, being sharply inclined, determining the radial projection of the said part, i.e. forming a variation in the spacing thereof, with respect to the geometrical centre of the cooker, in the relative turning between both semi-handles, radial projection which is not possible due to the cam linked to the control lever, in any working position of the cooker. 7. A regulation and control device for pressure cookers, according to claim 5, characterized in that the said cam which accompanies the control lever in its turning movement, has a sector with a large radius which is placed operatively opposite the top arm of the blocking part in any working position of the cooker, in turn determining the blocking of said part, and a second sector, with a smaller diameter, determining a broad radial notch, placed opposite in the top arm of the blocking part in the open situation, and which allows the free radial displacement of said part, determined by the inclination of the channel existing in the lower semi-handle. 8. A regulation and control device for pressure cookers, according to claim 6, characterized in that the cylindrical neck of the blocking part is assisted by a small spring which does not participate in the radial projection of said part, but which avoids possible vibrations thereof and when the lid and body are separate, establishes the correct position between said part in the situation opposite the mouth of the channel in the lower semi-handle. 9. A regulation and control device for pressure cookers, according to claim 2, characterized in that in the end of the arm of the top handle, corresponding to its head, with regard to the drive lever, there is a blocking element, suitably housed in a vertical groove, which has a top head capable of adopting three positions with respect to the lever eccentric assembly as follows: an intermediate position, corresponding to the closed situation, in which the said lever can turn freely to regulate the limit pressure of the cooker; a lower position, corresponding to the open situation, in which the head of the blocking element prevents the lever turning, thanks to a stop connected to the eccentric and which, with the change of state of the lever, touches the head of the blocking element; and a third position, in which the said blocking element occupies a bottom end position, necessary to start opening the cooker and which can only be reached when the lever is in the "O" position, corresponding to the open situation, and in which the element of the blocking head reaches the bottom base of the lever. 10. A regulation and control device for pressure cookers, according to claim 2, characterized in that the blocking element has an outer side extension, forming an inclined plane, which the safety shank touches, permanently subject to strain by a spring and also provided with an inclined plane, combined with the previous one, it being foreseen that the height of the said blocking element be determined by the separation of the two handles, in which case it adopts the bottom end position, through a ramp in the bottom handle and which the bottom end of the blocking element touches on closing, rising until it reaches its bottom end position, and by a housing also existing in the bottom handle, immediately after the said ramp, in which the end of the blocking element fits, in the closed situation, adopting its intermediate position, in which the pressure regulation lever is free. 11. A regulation and control device for pressure cookers, according to claim 2, characterized in that the said safety shank, immediately after the inclined plane touching the blocking element, stretches into side arms which frame the said element and which, when the latter moves downwards, are projected by the spring whose assists the said shank, so that its front touches the sealing gasket of the cooker, causing it to be strained on opening. 12. A regulation and control device for pressure cookers, according to claim 2, characterized essentially in that the blocking device is defined through a single part in which a cylindrical neck is defined for it to be correctly guided axially in a housing made operatively in the top semi-handle, said part including a bottom arm to control it through a groove made in the bottom semi-handle, a front shank touching the sealing gasket which links the body with the lid and a top arm assisted by a cam linked to the actual axis of the drive lever, it being foreseen that the channel made in the bottom semi-handle be virtually the same width as the bottom arm of the blocking part, being sharply inclined, determining the radial projection of the said part, i.e. forming a variation in the spacing thereof, with respect to the geometrical center of the cooker, in the relative turning between both semi-handles, radial projection which is not possible due to the cam linked to the control lever, in any working position of the cooker. 13. A regulation and control device for pressure cookers, according to claim 12, characterized in that the said cam which accompanies the control lever in its turning movement, has a sector with a large radius which is placed operatively opposite the top arm of the blocking part in any working position of the cooker, in turn determining the blocking of said part, and a second sector, with a smaller diameter, determining a broad radial notch, placed opposite in the top arm of the blocking part in the open situation, and which allows the free radial displacement of said part, determined by the inclination of the channel existing in the lower simi-handle. 14. A regulation and control device for pressure cookers, according to claim 7, characterized in that the cylindrical neck of the blocking part is assisted by a small spring which does not participate in the radial projection of said part, but which avoids possible vibrations thereof and when the lid and body are separate, establishes the correct position between said part in the situation opposite the mouth of the channel in the lower semi-handle. 15. A regulation and control device for pressure cookers, according to claim 3, characterized in that the blocking element has an outer side extension, forming an inclined plane, which the safety shank touches, permanently subject to strain by a spring and also provided with an inclined plane, combined with the previous one, it being foreseen that the height of the said blocking element be determined by the separation of the two handles, in which case it adopts the bottom end position, through a ramp in the bottom handle and which the bottom end of the blocking element touches on closing, rising until it reaches its bottom end position, and by a housing also existing in the bottom handle, immediately after the said ramp, in which the end of the blocking element fits, in the closed situation, adopting its intermediate position, in which the pressure regulation lever is free. 16. A regulation and control device for pressure cookers, according to claim 3, characterized in that the said safety shank, immediately after the inclined plane touching the blocking element, stretches into side arms which frame the said element and which, when the latter moves downwards, are projected by the spring which assists the said shank, so that its front touches the sealing gasket of the cooker, causing it to be strained on opening. 17. A regulation and control device for pressure cookers, according to claim 13, characterized in that the cylindrical neck of the blocking part is assisted by a small spring which does not participate in the radial projection of said part, but which avoids possible vibrations thereof and when the lid and body are separate, establishes the correct position between said part in the situation opposite the mouth of the channel in the lower semi-handle. 18. A regulation and control device for pressure cookers, according to claim 4, characterized in that the said safety shank, immediately after the inclined plane touching the blocking element, stretches into side arms which frame the said element and which, when the latter moves downwards, are projected by the spring which assists the said shank, so that its front touches the sealing gasket of the cooker, causing it to be strained on opening.
