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Multifunctional padlock having shackle limit knob

  • US 7,370,497 B2
  • Filed: 06/27/2006
  • Issued: 05/13/2008
  • Est. Priority Date: 01/11/2005
  • Status: Expired due to Fees
First Claim
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1. A padlock, comprising:

  • a housing;

    a shackle movably mounted on the housing and having a root section extended into the housing and a free section having a first end extended from the root section and a second end extended outside of the housing;

    a limit knob movably mounted on the housing to control movement of the free section of the shackle;

    a movable member movably mounted in the limit knob; and

    a first locking mechanism mounted in the housing and comprising a key lock unit and a movable shaft mounted on the key lock unit wherein the key lock unit is configured to control movement of the limit knob and has a key hole to receive a matching key; and

    the movable shaft is driven to move the movable member when the key or an insert is inserted into the key hole of the key lock unit;

    wherein the limit knob includes a knob body rotatably mounted on the housing and having an outer portion formed with a receiving recess to receive the free section of the shackle and an inner portion formed with a receiving chamber to receive the movable member, and a base portion extended from the knob body into the housing to connect the key lock unit, wherein the receiving recess has a central portion formed with a first opening and a peripheral wall formed with a second opening connected to the first opening.

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