EP0305588A2 - Verstärkter Plastikschlüsselschaft - Google Patents

Verstärkter Plastikschlüsselschaft Download PDF

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Publication number
EP0305588A2
EP0305588A2 EP19870115992 EP87115992A EP0305588A2 EP 0305588 A2 EP0305588 A2 EP 0305588A2 EP 19870115992 EP19870115992 EP 19870115992 EP 87115992 A EP87115992 A EP 87115992A EP 0305588 A2 EP0305588 A2 EP 0305588A2
Authority
EP
European Patent Office
Prior art keywords
key
shank
handle
molded plastic
thickening
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP19870115992
Other languages
English (en)
French (fr)
Other versions
EP0305588A3 (en
EP0305588B1 (de
Inventor
Robert Almblad
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Axxess Entry Technologies Inc
Original Assignee
Axxess Entry Technologies Inc
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
Application filed by Axxess Entry Technologies Inc filed Critical Axxess Entry Technologies Inc
Priority to AT87115992T priority Critical patent/ATE91167T1/de
Publication of EP0305588A2 publication Critical patent/EP0305588A2/de
Publication of EP0305588A3 publication Critical patent/EP0305588A3/en
Application granted granted Critical
Publication of EP0305588B1 publication Critical patent/EP0305588B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C11/00—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00
    • A45C11/32—Bags or wallets for holding keys
    • A45C11/325—Spare-key holders
    • A45C11/326—Card-like holders
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B19/00—Keys; Accessories therefor
    • E05B19/26—Use of special materials for keys
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
    • E05B15/16—Use of special materials for parts of locks
    • E05B15/1635—Use of special materials for parts of locks of plastics materials

Definitions

  • the present invention relates to molded plastic keys, whether individual keys, or plastic card/key combinations on the order of the disclosure in my U.S. Patent No. 4,677,835 dated July 7, 1987, and is more particularly concerned with reinforcing such keys against breaking at their shanks due to extraordinary twisting stress applied through the handles of the keys.
  • Conventional metal keys for operating tumbler locks such as in automobiles, building doors, apparatus controls, and the like, have heretofore been generally constructed throughout the shank and bit portions, at least, and generally also the handles, of a thickness common with the bit thickness. Molded plastic keys have also heretofore been constructed of substantially uniform thickness throughout their length similarly as comparable metal keys.
  • the key bit must be fairly snuggly fitted to the key slot in the cylinder plug. Looseness of the bit in the key slot might defeat proper engagement of the lock tumblers in the key notches.
  • Tendency of the user, where there is any such resistance to turning of the key in the lock, is to apply additional torque or twisting force to the key through its handle. Metal keys will generally withstand such extraordinary twisting stress.
  • An important object of the present invention is to provide a new and improved molded plastic key which is strengthened against torque induced breakage of the shank portion of the key.
  • Another object of the present invention is to provide a new and improved molded plastic key in which the shank portion is reinforced by a thickening.
  • a further object of the present invention is to provide a new and improved molded plastic key provided with a shank reinforcing insert.
  • a molded plastic key having a handle, a shank and a bit, and in which the shank is reinforced against breakage due to unusual torque applied though the key handle when resistance to turning is encountered after the bit is inserted into a lock.
  • a one-piece molded plastic key 10 having a head or handle 11, typically of substantially greater width than an integral shank 12 connecting the handle to a blade or bit 13.
  • the bit 13 is of the type which may have tumbler notches 14 cut along either or both edges, and for this purpose the cross-sectional geometry of the shank and bit may, as best seen in Fig. 2, be provided with longitudinal rabbet grooves 15 providing thinner margins along both edges.
  • the key 10 has the shank 12 and the bit 13 elongated for reception in a tumbler lock 17 (Fig. 4) having a tumbler barrel cylinder or plug 18 extending from a housing 19 defining a chamber 20 of ample size to accommodate a spring-biased flapper closure 21 which is adapted to be pushed aside by the key from the dash position to the full line position when the key is inserted through an entrance 22.
  • the entrance 22 affords ample clearance to facilitate entry of the key therethrough for reception in a key slot 23 which for practical reasons is fairly closely dimensioned relative to the key bit 13. A tolerance clearance of only about .005 inch is desirable between the bit 18 and the slot 23.
  • An entrance 24 into the key slot 23 flairs towards its outer end in a generally lead-in cam fashion to facilitate reception of the key bit 13 into the slot 23. From this it will be apparent that should there by extraordinary torque applied through the handle 11 after the key bit 13 has been introduced into the slot 23, there is no torque support for the shank 12, although the bit 13 fits closely in the slot 23.
  • the shank is reinforced.
  • reinforcement for the shank 12 may be advantageously provided by an integrally molded thickening 25 of the shank.
  • Such thickening 25 is preferable effective throughout the length of the shank from adjacent to but clear of the proximal area of the bit 13 to be notched.
  • the thickening avoids interference with close reception of the bit 13 in the key slot 23.
  • the thickening 25 is effected about .020 inch on both faces of the shank 12 and extends to at least a limited distance onto the adjacent portion of the handle 11.
  • the thickening 25 extends over substantially the entire width of both the shank 12 and the portion of the handle 11 provided with the thickening.
  • the thickening 25 may end abruptly, as shown at 26 (Fig. 3) as close as practicable to the area of the bit to be notched, so as to gain maximum advantage the thickening for its reinforcing function.
  • the handle end of the thickening 25 it may taper for smoothness both at the sides and at the handle end, substantially as visualized in Figs. 2 and 3.
  • the thickening 25 could cover the entire handle 11 on both faces of the handle, that is not necessary and plastic material is saved by having the thickening extend only partway onto the remainder of the handle. In any event, the thickening provides ample digital grip area for transmission of torque to the reinforced shank.
  • a modified shorter molded plastic key 27 having a handle 28, a short shank 29 and a bit 30 of a suitable length for the intended purpose.
  • the bit 30 has a rabbet groove 31 along only one side providing a thin longitudinal side area for receiving tumbler pin notches 32.
  • the key 27 is especially adaptable for operating a tumbler lock 33 of the kind having an escutcheon 34 providing an entrance with lead-in surfaces 35 and 37 of wider dimensions than a key slot 38 within the plug of the lock and into which the bit 30 fits fairly snuggly.
  • a reinforced shank molded plastic key 40 is provided which is especially suitable for use with tumbler locks that do not have the entrances into the key slot of significantly larger cross sectional dimensions than the key slot.
  • tumbler locks are especially prevelant outside of the U.S.A., particularly, in automobile locks.
  • the key 40 has a handle 41 which may be thicker than a short shank 42 and a bit 43 of suitable length.
  • the shank 42 and the bit 43 may have one or more longitudinally extending coding grooves 44, and at least one rabbet groove 45 along one longitudinal side of the bit 43 providing a relatively thin longitudinal side area 47 for having tumbler notches 48 cut therein to enable opening an intended tumbler lock (not shown).
  • a highly torque resistant reinforcing insert 48 is embodied in the shank 42 and the adjacent portion of the key handle.
  • the insert 48 comprises a thin hard metal member, desirably a hard steel stamping including a shank-reinforcing extension or finger 49 projecting from a body 50 having a head portion 51 at the opposite end from the finger 49. Rounded, i.e. radiused, corners 51a on the head 51 and similarly rounded corners 50a on the body 50 enhance molded integrity of the plastic key 40 and the insert 48.
  • the reinforcing finger 49 is of a width and thickness to be received in the shank portion of the tumbler pin notch-receiving area 47.
  • the finger 49 is desirably slightly less than the width of the key area 47 so as to maintain integrity of the shank portion 42 of the key relative to the key handle 41 and the bit 43.
  • the thickness of the reinforcing finger 49 and the key area 47 is preferably identical, and the opposite faces of the finger 49 may be exposed at the opposite faces of the area 47, whereby the finger 49 may be substantially in direct torque force contact with the entrance end of a tumbler lock key slot within which the shank 42 is received after the bit 43 has been fully inserted in the slot for operating the lock.
  • the length and terminal end of the finger 49 are calculated to extend the maximum permissible distance into the shank and the shank end of the area 47, having regard to the nearest tumbler pin notch 48.
  • a slanted or oblique terminal edge 49a is provided on the finger 49 to afford a clearance relative to the nearest notch 48 that may be cut in the area 47.
  • the diagonal terminal edge 49a terminates short of the place for the nearest notch 48, leaving a narrow separating portion of the area 47 between the edge 49a and the nearest notch 48.
  • the body portion 50 of the insert 48 is dimensioned to be imbedded within a stop portion 52 of the handle 40 and which stop portion abuts the outer end of a lock when the key shank is fully received within a lock.
  • the head end portion 51 of the insert 48 is dimensioned to be imbedded within the key handle 41 and is desirably of a length which will occupy about half the length of the handle, and is of a sufficient width for a thorough torque transmission connection between the finger 49 and the area of the handle 41 which is digitally grasped when turning the key 40 for operting a lock.
  • the flat insert 48 is substantially thinner than the key handle 41.
  • the shank 42, and the main thickness of the bit 43, and the body portion 50 and the head portion 51 are respectively sufficiently narrower than the stop portion 52 and the handle 41, so that as moldably embedded in the handle 41 the insert is thoroughly integrated in the handle.
  • Such molded integration and integrity of the key/insert unit is enhanced by having the handle 41 substantially thicker than the insert 48.
  • the key 40 may be utilized independently, it may also provide the key for a plastic card/key combination as depicted in Figs. 14-­17.
  • the key 40 is located within a complementary recess 53 within a preferably generally wallet size holder 54.
  • the recess 53 is located as conveniently near one side of the card 54 so that the remaining area of the face, or both faces, of the card can be utilized for any desired legends or indicia as schematically shown at 55.
  • integral multidirectional hinge means 55 comprising a unitary part of the molding and formed from the same material as the key and the molded card, and integrally connecting an edge of the key head or handle 41 to an edge of the card 54 in the recess 53.
  • the hinge means 55 comprises a generally elongated element which permits the key to be not only swung out of the plane of the card 54 but also to be twisted relative to the card on and about the hinge without breaking away from the card.
  • the hinge 55 comprises a generally rod shaped element which may be of cylindrical cross section and is longer than its diameter. Although the hinge 55 may be of slightly smaller diameter than the thickness of the head 41, as best seen in Fig.
  • the hinge diameter may be slightly greater than the thickness of the card 54.
  • a reinforcement extension 57 extends from the attached end of the hinges 55 onto the adjacent portion of the card 54 and is connected to a reinforcing rib 58 which runs along the edge of the card and stiffens the card in this area against undue flexibility.
  • a reinforced shank molded plastic key 60 is depicted which, in general respects, is similar to the key 40 in Fig. 9, but differs there from in that tumbler notching 48 is effected along both edges of the bit.
  • the key 16 has a handle 61, a shank 62 and a bit 63.
  • the bit 63 is symmetrical in cross section and has along each longitudinal side a generally rabbet coding groove 64, and the grooves face alternately relative to the opposite faces of the bit 63.
  • the bit 63 is symmetrical in cross section and has along each longitudinal side a generally rabbet coding groove 64, and the grooves face alternately relative to the opposite faces of the bit 63.
  • each of the grooves 64 there is a longitudinal side area 65 which is about half the thickness of the body of the bit 63. Tumbler notches 67 ae adapted to be cut in the area 65.
  • a high torque resistant reinforcing insert which is preferably in the form of a steel stamping 68.
  • a body portion 69 and a head portion 70 of the reinforcing insert 68 are fully embedded in the handle 61.
  • a transverse interlock slot 71 in the insert head 70 provides for a molded interlock 72 of the plastic key handle.
  • the insert 68 is of a thickness no greater than the thickness of at least one of the notch-receiving aeas 65 into which a reinforcing extension in the form of a finger 73 of the insert 68 projects from the insert body 69.
  • the finger 73 is so aligned with the associated bit area 65 that opposite faces of the finger 73 are exposed at the opposite faces of the area 65 for similar reasons as expressed in connection with the finger 49 in Fig. 9.
  • it is preferably wider than the width of the associated key area 65 and part of the finger is therefore moldable accommodated within the adjacent portion of the body of the shank 62.
  • Such body-embedded portion of the finger 73 is desirably the longer dimension of the finger where the finger has, as shown in Fig. 18, a slanted or oblique terminal edge 74.
  • the terminal edge 74 is oblique, it is desirably coined from opposite faces of the finger, as best seen in Fig. 21, to provide tapered or bevelled surfaces leading to the edge 74.
  • This provides a thinner section for the finger 73 adjacent to the edge 74, so that there will be interlocking overlaps 77 of the molded plastic material of the bit 63 in engagement with the tapered surfacs 75.
  • This provides good anchorage of the terminal end of the finger 73 within the molded material of the finger and maintains sound structural integrity of the moldably joined key 60 and the insert 68.
  • a key 80 similarly as the keys 40 and 60 comprises a handle 81 which is desirably thicker than a shank 82 and a bit 83, with a metal reinforcing insert 84 embedded in the handle and shank.
  • a head end portion 85 of the insert is embedded in the handle 81, with an interlock slot 87 providing for a molded plastic interlock 88.
  • From the head 85 projects an insert body 89 and, in this instance, a pair of spaced parallel reinforcing fingers 90 and 91 project from the body 89 into the key shank 82.
  • the finger 90 may be slightly wider than the finger 91, and in the shank area between the fingers may be a longitudinal coding groove extending troughout the length of the bit 83 as well as the shank 82. There may additional longitudinal coding grooves 93 in the shank 82 and running on along the bit 83.
  • a flat longitudinal tumbler pin notch-receiving area 94 runs along the side of the bit 83 which is in alignment with reinforcing finger 90.
  • the finger 90 as well as the finger 91 have their face areas exposed as contact surfaces. It may be observed that if it were not for the coding groove 92, the two fingers 90 and 91 could be constructed solidly in one piece. This emphasizes the verstatility of the fingered reinforcing insert concept for plastic keys.
  • Molded plastic keys of the kind described may be formed from an acetal resin, comprising a polymerized formaldehyde formulation, such as may be obtained from E.I. Dupont De Nemours & Company under the trademark "Delrin 500".
  • suitable material comprises sheet steel stampings such as cold rolled steel which may be hardened if desired, or a C1095 spring steel annealed and hardened to 55-57 Rockwell prior to molding in place in the plastic keys.
  • the present invention provides substantial reinforcement protection against torque damage to the critical shank areas of the molded plastic keys.

Landscapes

  • Springs (AREA)
  • Lock And Its Accessories (AREA)
  • Pens And Brushes (AREA)
  • Materials For Medical Uses (AREA)
  • Push-Button Switches (AREA)
  • Golf Clubs (AREA)
  • Walking Sticks, Umbrellas, And Fans (AREA)
EP87115992A 1987-09-03 1987-10-30 Verstärkter Plastikschlüsselschaft Expired - Lifetime EP0305588B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87115992T ATE91167T1 (de) 1987-09-03 1987-10-30 Verstaerkter plastikschluesselschaft.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US9149287A 1987-09-03 1987-09-03
US91492 1987-09-03

Publications (3)

Publication Number Publication Date
EP0305588A2 true EP0305588A2 (de) 1989-03-08
EP0305588A3 EP0305588A3 (en) 1990-06-13
EP0305588B1 EP0305588B1 (de) 1993-06-30

Family

ID=22228064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115992A Expired - Lifetime EP0305588B1 (de) 1987-09-03 1987-10-30 Verstärkter Plastikschlüsselschaft

Country Status (4)

Country Link
EP (1) EP0305588B1 (de)
AT (1) ATE91167T1 (de)
DE (1) DE3786402T2 (de)
ZA (1) ZA886362B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2803464A2 (de) 2013-05-14 2014-11-19 EVVA Sicherheitstechnologie GmbH Verfahren zur Herstellung eines Schlüssels sowie eine Vorrichtung zur Durchführung des Verfahrens
EP2803792A2 (de) 2013-05-14 2014-11-19 Evva Sicherheitstechnologie GmbH Schlüssel zum Betätigen eines Schließzylinders sowie Verfahren zur Herstellung des Schlüssels
EP2803791A2 (de) 2013-05-14 2014-11-19 Evva Sicherheitstechnologie GmbH Schlüssel zum Betätigen eines Schließzylinders sowie Kombination des Schlüssels mit dem Schließzylinder
EP2803790A2 (de) 2013-05-14 2014-11-19 Evva Sicherheitstechnologie GmbH Schlüssel zum Betätigen eines Schließzylinders

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH679507A5 (de) * 1989-12-15 1992-02-28 Bauer Kaba Ag

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1669387U (de) * 1953-04-22 1953-12-31 Heinz Roesinger Schluessel fuer tuerschloesser od. dgl.
DE1901655U (de) * 1964-06-23 1964-10-01 Krause Kg Robert Schluessel aus kunststoff, insbesondere fuer moebelschloesser.
CH495488A (de) * 1967-08-15 1970-08-31 Dana Eugene Schlüssel sowie Verfahren zu seiner Herstellung
DE2037071A1 (de) * 1970-07-27 1972-02-03 Strohschnitter & Co, 2000 Hamburg Schlüssel
DE3518354A1 (de) * 1985-05-22 1986-11-27 Heinrich Winkelhard GmbH & Co KG Plastik- u. Metallwarenfabrik, 4708 Kamen Verfahren zur herstellung von schluesseln oder von schluesselrohlingen fuer schloesser
US4637236A (en) * 1984-06-12 1987-01-20 Almblad Donald F Key and retainer card combination
US4677835A (en) * 1986-04-10 1987-07-07 Donald Almblad Plastic card/key combination and hinge structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1669387U (de) * 1953-04-22 1953-12-31 Heinz Roesinger Schluessel fuer tuerschloesser od. dgl.
DE1901655U (de) * 1964-06-23 1964-10-01 Krause Kg Robert Schluessel aus kunststoff, insbesondere fuer moebelschloesser.
CH495488A (de) * 1967-08-15 1970-08-31 Dana Eugene Schlüssel sowie Verfahren zu seiner Herstellung
DE2037071A1 (de) * 1970-07-27 1972-02-03 Strohschnitter & Co, 2000 Hamburg Schlüssel
US4637236A (en) * 1984-06-12 1987-01-20 Almblad Donald F Key and retainer card combination
DE3518354A1 (de) * 1985-05-22 1986-11-27 Heinrich Winkelhard GmbH & Co KG Plastik- u. Metallwarenfabrik, 4708 Kamen Verfahren zur herstellung von schluesseln oder von schluesselrohlingen fuer schloesser
US4677835A (en) * 1986-04-10 1987-07-07 Donald Almblad Plastic card/key combination and hinge structure

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2803464A2 (de) 2013-05-14 2014-11-19 EVVA Sicherheitstechnologie GmbH Verfahren zur Herstellung eines Schlüssels sowie eine Vorrichtung zur Durchführung des Verfahrens
EP2803792A2 (de) 2013-05-14 2014-11-19 Evva Sicherheitstechnologie GmbH Schlüssel zum Betätigen eines Schließzylinders sowie Verfahren zur Herstellung des Schlüssels
EP2803791A2 (de) 2013-05-14 2014-11-19 Evva Sicherheitstechnologie GmbH Schlüssel zum Betätigen eines Schließzylinders sowie Kombination des Schlüssels mit dem Schließzylinder
EP2803790A2 (de) 2013-05-14 2014-11-19 Evva Sicherheitstechnologie GmbH Schlüssel zum Betätigen eines Schließzylinders
EP2803464A3 (de) * 2013-05-14 2014-12-24 EVVA Sicherheitstechnologie GmbH Verfahren zur Herstellung eines Schlüssels sowie eine Vorrichtung zur Durchführung des Verfahrens
EP2803791A3 (de) * 2013-05-14 2016-07-06 Evva Sicherheitstechnologie GmbH Schlüssel zum Betätigen eines Schließzylinders sowie Kombination des Schlüssels mit dem Schließzylinder

Also Published As

Publication number Publication date
EP0305588A3 (en) 1990-06-13
DE3786402T2 (de) 1993-11-04
EP0305588B1 (de) 1993-06-30
DE3786402D1 (de) 1993-08-05
ZA886362B (en) 1990-12-28
ATE91167T1 (de) 1993-07-15

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