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Stem brush with automatic insertion system

  • US 5,365,627 A
  • Filed: 07/22/1993
  • Issued: 11/22/1994
  • Est. Priority Date: 07/22/1993
  • Status: Expired due to Fees
First Claim
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1. An oral hygiene device having an automatic stem insertion system comprising:

  • a handle and a motor driven shaft, a stem coupled with the shaft, the stem insertion system including at least one key, a base receiving the shaft, at least one slot, each slot receiving a key, at least one sleeve having a ramp for receiving and engaging the key when coupling the stem to the handle and with a camming action of the key on the ramp, guiding the key into the slot, and means for releasably coupling the stem on the handle the coupling means including a radially extending flange and at least one flexible arm having a recess receiving the flange whereby upon coupling the stem to the handle, the flange engaging the arm and flexes the arm outwardly and further movement of the stem onto the handle causes the flange to enter the recess with a snap action, and upon withdrawal of the stem from the handle, the flange causes the arm to flex outwardly to release the flange from the recess.

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