WO1997007726A1 - Dispositif permettant de saisir un recipient de cuisson et similaire - Google Patents

Dispositif permettant de saisir un recipient de cuisson et similaire Download PDF

Info

Publication number
WO1997007726A1
WO1997007726A1 PCT/US1996/013847 US9613847W WO9707726A1 WO 1997007726 A1 WO1997007726 A1 WO 1997007726A1 US 9613847 W US9613847 W US 9613847W WO 9707726 A1 WO9707726 A1 WO 9707726A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring
pivot
gripping device
post
movable members
Prior art date
Application number
PCT/US1996/013847
Other languages
English (en)
Inventor
Alfred Neubauer
Original Assignee
Magic Mold Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/683,821 external-priority patent/US5673955A/en
Application filed by Magic Mold Corporation filed Critical Magic Mold Corporation
Publication of WO1997007726A1 publication Critical patent/WO1997007726A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J45/00—Devices for fastening or gripping kitchen utensils or crockery
    • A47J45/10—Devices for gripping or lifting hot cooking utensils, e.g. pincers, separate pot handles, fabric or like pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/06—Joints
    • B25B7/08—Joints with fixed fulcrum

Definitions

  • the invention is directed specifically to a special purpose gripping device, although some of the principles of the invention have broader applicability, as will appear.
  • pizzas are prepared and baked in shallow metal pans, formed with a low sidewall and, typically, a beaded upper edge.
  • the pizzas are placed in hot ovens for baking in the metal pans.
  • the pizzas are removed by gripping and removing the hot metal pans.
  • the industry has extensively employed a "pliers" style of gripping device.
  • the preferred gripping device has comprised a pair of movable gripping elements, formed of cast aluminum, joined together on a pivot axis by a bolt or rivet.
  • a spring element of a more or less conventional type, is employed to bias the gripping jaws of the tool toward an open position.
  • pan gripping devices tend to have a relatively short useful life. Being good conductors of heat, they are frequently dropped or otherwise roughly handled and tend easily to become broken or damaged. As a result, these items tend to represent an undesirably high cost factor to the pizza industry.
  • a novel and improved design of pan gripping device in which all of the component parts are formed of injection molded plastic material, which is both lightweight and strong, and thus more easily used by the workers, and has good insulating qualities.
  • the elements forming a pivot connection between the two primary movable members of the gripping device can be integrally molded therewith in a unique and advantageous manner, which permits the two members to be joined by simply pressing them together to form a permanently assembled pivotal connection.
  • one of the movable members is formed with an integral, laterally projecting pivot post, formed with a cylindrical bearing portion and an annular groove.
  • the second movable member is formed with an integral, tubular pivot member, received over the pivot post, and formed with a plurality of resilient, inwardly inclined locking tabs. These locking tabs are displaced outwardly, during a press- together assembly of the parts, and snap into place in locking relation with the annular groove on the pivot post, when the parts are fully assembled.
  • the device of the invention for biasing the gripping jaws toward an open position, incorporates a molded plastic spring, which is received in and endorsed by annular recesses molded into the principal moving members of the gripping device, in surrounding relation to the pivot post.
  • the spring advantageously is in the form of a large arc of a circle, provided with hook-like formations at each end, somewhat in the form of the greek letter "omega".
  • Each of the pivotally connected members of the gripping device is formed with a spring post, engageable with the hook-like formations as the jaws of the device approach closed positions.
  • the design of the device advantageously is such that the spring element may be simply placed in one of the recesses, prior to assembly of the two principal pivot members, without pretensioning or other special manipulation.
  • An anchor post extending from one of the pivotally connecting members secures the spring during assembly.
  • the device may be manufactured and marketed at extremely low cost and in high volume.
  • the improved gripping device includes first and second movable members pivotally attached to one another, characterized by the movable members being formed by molding with structural plastic material, a pivot connecting the movable members, the pivot including a pivot post and a pivot member of tubular configuration, the tubular pivot member being adapted for close-fit reception over the pivot post for pivotally joining the first and second movable members, at least one of the pivot post and the tubular pivot member being integral to one of the first and second movable members, at least one movable member is formed with a circular wall encircling and concentric with the pivot, the circular wall of one of the members lies in sliding, abutting relation with the other member, the circular wall is spaced radially outward of the pivot to form an annular chamber, which is at least partially enclosed, a spring element received in the chamber, the spring element having the form of a partial circle with hook-like elements at each end, spring posts extending from the movable members and into the annular chamber, the spring posts being located such that when the gripping device
  • Fig. 1 is an elevational view of an advantageous form of pan gripping device incorporating features of the invention
  • Fig. 2 is an elevational view of one of two principal moving members of the device of Fig. 1;
  • Fig. 3 is an elevational view of a second of the two principal moving parts of the device of Fig. 1, viewed as from the opposite side of the view of Fig. l;
  • Figs. 4 and 5 are cross sectional views as taken generally on lines 4-4 of Fig. 2, and 5-5 of Fig. 3, respectively;
  • Fig. 6 is an enlarged, fragmentary cross sectional view as taken generally on line 6-6 of Fig. 1;
  • Figs. 7 and 8 are enlarged, cross sectional views as taken generally along line 7-7 of Fig. 2, and line 8-8 of Fig. 3, respectively;
  • Figs. 9 and 10 are a top plan and side elevational view, respectively, of a spring element employed advantageously in the device of Fig. 1;
  • Fig. 11 is a fragmentary elevational view of the moving member of Fig. 2, showing the anchor element.
  • the illustrated embodiment of the invention is a specialty gripping device for handling shallow baking pans for the pizza industry.
  • the device includes first and second handles 10, 11, joined at a pivot 12 and provided with respective gripping jaws 13, 14.
  • the first handle 10 is formed with an opening 15 for receiving the fingers, while the second or upper handle 11 is preferably in the form of a straight lever.
  • the lower jaw 14 preferably is in the form of a wide flat stabilizing pad 16, while the upper jaw 13 can be in the form of a somewhat narrower pincer element.
  • the respective working surfaces 17, 18 of the jaws preferably are disposed at an angle to the general disposition of the handles 10, 11, to facilitate gripping the sidewall 19 of a shallow baking pan.
  • the device of the invention desirably is formed by injection molding of a relatively heat resistant structural plastic, for example nylon.
  • a relatively heat resistant structural plastic for example nylon.
  • the lower handle 10 is formed with a plurality of flange-like elements 20-23 integrally joined by web sections 24-26.
  • the upper handle member 11 is formed with flange elements 27- 30, connected by web sections 31, 32.
  • elements for pivotally connecting the handles 10, 11 can be molded integrally with the handle elements themselves.
  • the lower handle 10 is formed with a circular flange portion 33 (Fig. 2) integrally joined with a circular sidewall 34.
  • an integral pivot post In the center of the circular flange and wall is an integral pivot post, generally designated by the numeral 35.
  • the pivot post 35 has a cylindrical portion 36, which extends laterally from the circular sidewall 34, preferably to a point well beyond the outer edge of the circular wall 33.
  • the cylindrical portion 36 forms the main pivot bearing of the device, as will appear.
  • the outer end portion of the pivot post 35 is comprised of an outer flange portion 37, which preferably is of smaller diameter than the cylindrical portion 36.
  • an annular groove 38 Intermediate the flange 37 and the cylindrical portion 36 is an annular groove 38, of generally V-shaped cross sectional configuration formed by an annular abutment surface 39 and an annular guide surface 40, as shown particularly in Fig. 7.
  • the remainder of the pivot joint advantageously is molded integrally with the upper handle 11, which is formed with a circular flange 41 (Fig. 3) extending laterally from a circular sidewall 42.
  • a cylindrical tubular bearing section 43 Extending laterally from the sidewall 42, and preferably integrally therefrom, is a cylindrical tubular bearing section 43, the length and dia eter of which enable it to be slipped over the cylindrical portion 36 of the pivot post to provide a sturdy pivot connection.
  • the respective dimensions of the circular flanges 33, 41, and the length and positioning of the cylindrical bearing section 43 are such that, when the bearing section 43 is fully seated on the pivot post 35, the circular flanges 33, 41, which are of the same diameter, substantially meet at their outer edges, as at 44 in Fig. 6, defining a closed annular chamber 45, the function of which will be further described.
  • the abutting engagement of the circular flanges 33, 41 also adds great stability to the pivot joint.
  • the integral bearing structure of the handle member 11 includes a plurality of integrally formed, resilient, inwardly inclined locking tabs 46, which surround the inner end 47 of the cylindrical bearing portion 43.
  • locking tabs 46 there are a plurality (for example eight) of such locking tabs arrayed around the outer edge of the cylindrical member 43, with spaces 48 formed between adjacent tabs.
  • the individual locking tabs 46 project inward, toward the central axis of the pivot at a shallow angle of, say, 30°.
  • the angle of the annular guide surface 40 of the pivot pin is formed at approximately the same angle.
  • the outer end extremities 49 of the locking tab are disposed generally at right angles to the bodies of the locking tabs, to form locking abutment surfaces. These surfaces 49 are arranged to be in butting relationship with the annular surface 39 forming outer portions of the annular groove 38 on the pivot post 35.
  • the outermost portion of the pivot post 35 is of slightly smaller diameter than the cylindrical portion 36 and is formed with an inwardly tapered guide surface 50.
  • a gripping device designed for the handling of pans for the pizza industry includes a means for biasing the gripping device to a slightly open position, sufficient to enable the gripping device to be applied over the edge of a baking pan without the operator having to manually open the jaws.
  • the device of the invention incorporates a novel form of biasing spring arrangement, including a spring 60 (Figs. 9 and 10) preferably formed of molded nylon or Celcon, similar to the material of the handles 10, 11.
  • the spring 60 advantageously is of generally circular form, constituting the major portion of a generally circular arc, but provided with a separation at one side, as at 61.
  • the opposite end portions of the spring, which define the separation 61 are hook-like elements 62, 63.
  • the spring 60 has a configuration similar to the letter "omega".
  • the at-rest inside dimension of the spring 60 is greater than the outside diameter of the tubular bearing portion 43, and the at-rest outside dimension of the spring is desirably somewhat less than the inside diameter dimensions of the respective circular flanges 33, 41, so that the spring fits easily into the annular chamber 45.
  • the chamber 45 may have an inside diameter of 0.70 in and an outside diameter of 1.30 in, while the spring 60, unstressed, may have an inside diameter of 0.85 in and an outside diameter of 1.13 in.
  • the inside dimension of spring 60 is preferably somewhat greater than the outside diameter of tubular bearing portion 43, so that the gripping device may be fully closed without binding the spring against tubular bearing portion 43.
  • Each of the handle members 10, 11 is formed with spring post 64 and 65 (Figs. 2 and 3) , respectively, which preferably have oval cross sections complementary to the shape of the hook-like elements 62, 63 of the spring 60.
  • one of the handle members (such as 10 in Fig. 2) is formed with an anchor element 66.
  • the spring posts 64, 65 extend laterally from the respective circular sidewalls 34, 42 and project into the annular chamber 45. The location of the respective spring posts 64, 65 is such that, when the jaws of the gripping device are well open, with the handles disposed at an angle of, say, 30° open, the circumferential spacing between the respective spring posts exceeds the distance between the hook portions 62, 63 of the spring 60 in its at-rest or unstressed condition.
  • the spring may be simply laid into the annular recess formed by one of the members, with one of the hook portions 62 or 63 of the spring engaging the spring post 64 or 65 of that member.
  • the second handle member is then assembled with the first while being disposed in an open configuration such that there is clearance between its spring post and the second hook portion of the spring member.
  • the spring is not under any stress or tension during the assembly and thus does not interfere with the assembly nor require any special operations to be performed.
  • the locations of the respective spring posts 64, 65 are such that, as the respective gripping jaws 13, 14 approach a fully closed condition, the hook portions 62, 63 of the spring 60 are engaged by the respective spring posts, placing the spring under circumferential tension, and biasing the jaws back to a slightly open position, as soon as gripping pressure is released.
  • an anchor element 66 may be associated with one of the spring posts 64 (see Figs. 2 and 11) .
  • the location of the anchor element 66 is such that, when spring 60 is inserted into the handle member 10, the hook 63 is trapped between the spring post 64 and the anchor element 66 thereby anchoring one end of the spring 60 and preventing its free rotation within the annular chamber 45 during assembly and at all other times. This facilitates the assembly operation by fixing the location of thee spring 60 with respect to one of the handles while the other handle is being attached.
  • the device of the invention represents a vast improvement over existing devices available to the pizza baking industry.
  • the device can be easily mass produced at extremely low cost, partly because the elements thereof can be injection molded from plastic material, and partly because the assembly of the device can be accomplished with extraordinary efficiency.
  • the typical gripping device or the like employs a bolt, rivet or the like to form a pivotal connection between the two parts
  • all the pivot elements of the new device are molded integrally with the handle members themselves, and assembly is accomplished by merely pressing one part together with the other.
  • the biasing spring may be included in the assembly, by simply laying the spring in place in an annular recess provided therefor in the respective handle members, and then pressing the two handle members together to form the permanent pivot connection. No special tools or operations are required to install the biasing spring and make it operational.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Food-Manufacturing Devices (AREA)

Abstract

L'invention concerne un dispositif de préhension, utile en particulier pour saisir des récipients de cuisson chauds. Ce dispositif comporte des premier et second éléments mobiles (10, 11) moulés en plastique rigide. Un des éléments a une saillie (35) s'étendant latéralement et constituant un tourillon de pivotement. L'autre élément mobile a un manchon de pivotement (43) s'adaptant sans jeu sur le tourillon de pivotement, pour permettre aux deux éléments mobiles réunis de pivoter l'un par rapport à l'autre. Le tourillon de pivotement a une rainure annulaire (38) et le manchon de pivotement a plusieurs languettes (46) de verrouillage résilientes destinées à verrouiller les deux parties ensemble. Un ressort (60), ayant la forme d'un oméga, est pourvu d'une paroi circulaire autour du tourillon et du manchon. Chaque élément mobile comporte une saillie (64, 65) pour s'engager avec le ressort. Un des éléments mobiles comporte un élément d'ancrage (66) pour immobiliser une extrémité du ressort sur la saillie correspondante.
PCT/US1996/013847 1995-08-29 1996-08-23 Dispositif permettant de saisir un recipient de cuisson et similaire WO1997007726A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US292395P 1995-08-29 1995-08-29
US60/002,923 1995-08-29
US08/683,821 1996-07-18
US08/683,821 US5673955A (en) 1996-05-10 1996-07-18 Pan gripper or the like with spring anchor

Publications (1)

Publication Number Publication Date
WO1997007726A1 true WO1997007726A1 (fr) 1997-03-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/013847 WO1997007726A1 (fr) 1995-08-29 1996-08-23 Dispositif permettant de saisir un recipient de cuisson et similaire

Country Status (1)

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WO (1) WO1997007726A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004021897A1 (fr) * 2002-09-05 2004-03-18 Aesculap Ag & Co. Kg Instrument medical en deux parties
GB2416322A (en) * 2004-07-21 2006-01-25 Peter Michael Woodworth Scissors or tongs with pivot and spring
FR3049483A1 (fr) * 2016-04-01 2017-10-06 Mjk Instr Systeme de ressort de rappel pour pinces articulees

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US767403A (en) * 1903-11-18 1904-08-16 Charles Glover Wrench.
US2392118A (en) * 1944-12-28 1946-01-01 Parker Mfg Company Crossed-lever tool
US2847889A (en) * 1955-01-24 1958-08-19 Lewis Phillips J Gripping tool jaws
US3551963A (en) * 1968-08-16 1971-01-05 Walter W Mosher Jr Self-locking snap fastener
US3559515A (en) * 1967-12-20 1971-02-02 Aircraft Specialties Inc Self gripping needle-nose plier
US3982450A (en) * 1974-05-20 1976-09-28 Haffenden-Richborough Limited Plastic forceps hinge
US4669340A (en) * 1985-11-02 1987-06-02 Igarashi Plier Co., Ltd. Slip-joint pliers

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US767403A (en) * 1903-11-18 1904-08-16 Charles Glover Wrench.
US2392118A (en) * 1944-12-28 1946-01-01 Parker Mfg Company Crossed-lever tool
US2847889A (en) * 1955-01-24 1958-08-19 Lewis Phillips J Gripping tool jaws
US3559515A (en) * 1967-12-20 1971-02-02 Aircraft Specialties Inc Self gripping needle-nose plier
US3551963A (en) * 1968-08-16 1971-01-05 Walter W Mosher Jr Self-locking snap fastener
US3982450A (en) * 1974-05-20 1976-09-28 Haffenden-Richborough Limited Plastic forceps hinge
US4669340A (en) * 1985-11-02 1987-06-02 Igarashi Plier Co., Ltd. Slip-joint pliers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004021897A1 (fr) * 2002-09-05 2004-03-18 Aesculap Ag & Co. Kg Instrument medical en deux parties
US7393348B2 (en) 2002-09-05 2008-07-01 Aesculap Ag & Co. Kg Two-part medical instrument
GB2416322A (en) * 2004-07-21 2006-01-25 Peter Michael Woodworth Scissors or tongs with pivot and spring
GB2416322B (en) * 2004-07-21 2009-06-24 Peter Michael Woodworth Implements
FR3049483A1 (fr) * 2016-04-01 2017-10-06 Mjk Instr Systeme de ressort de rappel pour pinces articulees

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