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Cart management system

  • US 5,921,373 A
  • Filed: 09/21/1995
  • Issued: 07/13/1999
  • Est. Priority Date: 09/15/1994
  • Status: Expired due to Term
First Claim
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1. A cart management system for vending carts, comprising:

  • (a) a cart key mounted to a cart at a predetermined height;

    (b) a retainer sized to selectively retain the cart key; and

    (c) a key identification sensor operable to identify the cart when the cart key is retained by the retainer, the key identification sensor including;

    (i) a first transmitter disposed within the cart key, operable to provide an identification signal indicative of the cart; and

    (ii) a first receiver coupled to the retainer and operable to detect the identification signal when the cart key is retained by the retainer.

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