US3636738A - Padlock - Google Patents

Padlock Download PDF

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Publication number
US3636738A
US3636738A US755969A US3636738DA US3636738A US 3636738 A US3636738 A US 3636738A US 755969 A US755969 A US 755969A US 3636738D A US3636738D A US 3636738DA US 3636738 A US3636738 A US 3636738A
Authority
US
United States
Prior art keywords
lock
cover plate
casing
lock according
recess
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.)
Expired - Lifetime
Application number
US755969A
Other languages
English (en)
Inventor
Valdemar Burakoff
Paul Krakstrom
Into Sinervo
Kaarlo Solitanner
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.)
Wartsila Oy AB
Original Assignee
Wartsila Oy AB
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 Wartsila Oy AB filed Critical Wartsila Oy AB
Application granted granted Critical
Publication of US3636738A publication Critical patent/US3636738A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B67/00—Padlocks; Details thereof
    • E05B67/06—Shackles; Arrangement of the shackle
    • E05B67/22—Padlocks with sliding shackles, with or without rotary or pivotal movement
    • E05B67/24—Padlocks with sliding shackles, with or without rotary or pivotal movement with built- in cylinder locks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49934—Inward deformation of aperture or hollow body wall by axially applying force
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/40—Portable
    • Y10T70/413—Padlocks
    • Y10T70/437—Key-controlled
    • Y10T70/446—Rigid shackle
    • Y10T70/452—Sliding
    • Y10T70/459—Both legs engaged
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/40—Portable
    • Y10T70/413—Padlocks
    • Y10T70/487—Parts, accessories, attachments and adjuncts
    • Y10T70/489—Housings

Definitions

  • ABSTRMT A padlock of hardened steel having a lock mechanism inserted CL 2 through an opening in the lock casing, which opening is [51] Int. Cl. ..E05b 67/22, E05b 67/02 covered by a cover plate with a very shallow surface harden- [58] Field of Search ..70/5 1 52, 38, 38 A, 38 B, ing.
  • the cover plate is initially curved and is pressed flat to fill a conical attachment recess in the lock casing.
  • the present invention relates to a padlock comprising a lock casing, a lock shackle to be locked in the lock casing, and a lock bolt providing a locking action and being movable inside the lock casing and operable by a lock mechanism.
  • the hardness penetration in the cover plate is a maximum of 0.1 mm., preferably 0.07 mm. at a maximum.
  • the hardness penetration on the inner surface of the cover plate may be the same.
  • the inner surface may also be left unhardened, but this causes higher production costs.
  • the cover plate is most suitably attached in a conical recess into which the initially convex cover plate can be inserted, and thereafter by pressing the cover plate flat it can be made to completely fill said recess.
  • the opening covered by the cover plate is preferably made in the shackle end of the lock casing, because this part is protected by the shackle and by the attachment irons of the lock.
  • the complete surface hardening of the lock casing prevents breaking the lock by means of boring or sawing.
  • the strength of the lock can be improved by rounding the shackle facing edges of the guide borings for the lock bolts at least above the lock bolt. It has been found that the strength of the lock may be increased by more than percent if the radius of the rounding is 0.4 to 1.2 mm.
  • the strength and general durability of the lock can be further improved by making the lock casing of substantially rectangular bar stock which is provided with two borings for the shackle and one boring for the lock mechanism which preferably is a cylinder lock. In this way also the production costs of the lock are substantially reduced.
  • the lock bolts 3 are movable in borings 9. The movement is obtained by turning the cylinder of the lock mechanism 4, whereby a plate 10 at the end of the cylinder pushes the lock bolts 3 outwards. In the opposite direction, the bolts 3 move by being pushed by the inclined surfaces of the shackle 2.
  • the edges of the borings 9 facing the shackle 2 are at least on the upper side, rounded with a radius r, of about 0.4 to 1.2 mm. It has been found, that a radius of 0.5 mm. can increase the strength of the lock by more than 10 percent. This is due to the fact, that part of the shearing stress of the lock bolts is transformed into bending stress. If the rounding radius r is made too large, the strength of the lock decreases.
  • the plate 10 should be of such a hard material that it is not deformed by the load of the lock bolts when the shackle is pulled outwards with a great force.
  • the lock cylinder In the boring 6 there is a locking ring 11 above the lock cylinder of the lock mechanism. If the lock cylinder is loaded axially through the key hole, the lock cylinder will reach the locking ring 11 at the same time that the plate 10 reaches the cover 7. The cover 7 and the locking ring 11 will then both take up the axial load and in this case the lock may withstand a load of the order discussed of more than 5,000 kp.
  • a padlock comprising a lock casing, a shackle to be locked in said lock casing and at least one lock bolt providing a locking action and being movable in said lock casing and operable by a lock mechanism; an improvement wherein the outside surface of said lock casing is completely hardened and said lock casing is provided with an opening for the insertion of the lock mechanism into said lock casing, a cover plate for closing said opening, said cover plate having a shallow surface hardening to allow said cover plate to be attached into an attachment groove at said opening by means of a slight bending.
  • a lock according to claim 1 wherein a conical recess for said cover plate is provided in said lock casing, said cover plate being initially curved and inserted into said recess by being pressed flat.
  • a lock according to claim I wherein said casing has a guiding bore for movement of said lock bolt, said guiding bore having a rounded edge adjacent said shackle.
  • a lock according to claim 2 wherein said cover plate is initially convex with a cylindrical edge, the latter edge. being locked in said conical recess when the cover plate is pressed flat and pennaneritly deformed in said recess.
  • a lock according to claim 1 comprising a locking ring arranged to resist at least part of an axial load applied to aid lock mechanism through the keyhole of said padlock.
  • a lock according to claim 1, wherein said lock casing is made of substantially rectangular bar stock and is provided with two borings for said shackle and one boring for said lock mechanism.

Landscapes

  • Switch Cases, Indication, And Locking (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
US755969A 1967-08-29 1968-08-28 Padlock Expired - Lifetime US3636738A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI231567 1967-08-29

Publications (1)

Publication Number Publication Date
US3636738A true US3636738A (en) 1972-01-25

Family

ID=8506933

Family Applications (1)

Application Number Title Priority Date Filing Date
US755969A Expired - Lifetime US3636738A (en) 1967-08-29 1968-08-28 Padlock

Country Status (4)

Country Link
US (1) US3636738A (no)
DE (1) DE1728108A1 (no)
GB (1) GB1229050A (no)
SE (1) SE328804B (no)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241594A (en) * 1979-09-04 1980-12-30 Sargent & Greenleaf, Inc. Slide cover type changeable key plug padlock
US6393876B1 (en) 1997-12-08 2002-05-28 Mul-T-Lock Technologies Ltd. Padlock
US20140208812A1 (en) * 2013-01-30 2014-07-31 Pado S/A Industrial Comercial E Importadora Constructive arrangement applied to a lock
US10221592B2 (en) * 2017-06-23 2019-03-05 Master Lock Company Llc Padlock assembly
JP2023532420A (ja) * 2020-07-01 2023-07-28 アブロイ オサケ ユキチュア 電子南京錠

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3906619C1 (en) * 1989-03-02 1990-10-11 Burg-Waechter Kg Alfred Lueling, 5882 Meinerzhagen, De Padlock

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241594A (en) * 1979-09-04 1980-12-30 Sargent & Greenleaf, Inc. Slide cover type changeable key plug padlock
US6393876B1 (en) 1997-12-08 2002-05-28 Mul-T-Lock Technologies Ltd. Padlock
US20140208812A1 (en) * 2013-01-30 2014-07-31 Pado S/A Industrial Comercial E Importadora Constructive arrangement applied to a lock
US10221592B2 (en) * 2017-06-23 2019-03-05 Master Lock Company Llc Padlock assembly
JP2023532420A (ja) * 2020-07-01 2023-07-28 アブロイ オサケ ユキチュア 電子南京錠

Also Published As

Publication number Publication date
GB1229050A (no) 1971-04-21
SE328804B (no) 1970-09-21
DE1728108A1 (de) 1972-05-18

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