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Protective hood for grinding machines, particularly angle grinders, and suitable fastening receptacle for the latter

  • US 5,005,321 A
  • Filed: 04/28/1989
  • Issued: 04/09/1991
  • Est. Priority Date: 10/28/1986
  • Status: Expired due to Term
First Claim
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1. A protective hood assembly for a grinding machine having a predetermined nominal rotational speed and including a housing a shaft projecting from the housing for receiving at a free end thereof a grinding disc having a predetermined diameter corresponding to the nominal rotational speed of the grinding machine, said protective hood assembly comprising a protective hood having a predetermined size corresponding to the predetermined diameter of the grinding disc;

  • and a fastening receptacle attachable to the grinding machine housing and having a shoulder for receiving said protective hood;

    said protective hood including a portion for securing said protective hood on said shoulder, and locking means comprising a predetermined number of locking members arranged on said securing portion in a predetermined manner with each locking member having a predetermined shape and size, at least one of the predetermined number of said locking members, the predetermined manner of arrangement of said locking members, the predetermined size of each locking member, and the predetermined shape of each locking member defining the predetermined size of said protective hood, said shoulder of said fastening receptacle including opening means for receiving said locking means, comprising a predetermined number of openings, and arranged in a predetermined manner with each opening having a predetermined size and a predetermined shape, at least one of the predetermined number of said openings, the predetermined arrangement of said opening means, the predetermined size of each opening, and the predetermined shape of each opening being selected to correspond to said at least one of the predetermined number of locking members, the predetermined manner of arrangement of the locking members, the predetermined size of each locking member, and the predetermined shape of each locking member defining the predetermined size of said protective hood, respectively, in such a way as to prevent mounting on said fastening receptacle protective hoods having a size exceeding said predetermined size while permitting mounting on said fastening receptacle protective hoods having a size smaller than said predetermined size of said protective hood.

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