Shock absorbing hammer and handle assembly

{
  "publication_number": "US6763747B1",
  "country": "US",
  "kind": "B1",
  "title": "Shock absorbing hammer and handle assembly",
  "abstract": "The present invention relates to a shock absorbing hammer and handle assembly. The shock absorbing hammer includes a hammer head including a striking portion, a shaft connected to the hammer head, and a hand grip. In accordance with aspects of the present invention, a hand grip assembly suitable for use with the shock absorbing hammer includes a shell defining an outer surface and an inner cavity. An inner elastomeric layer lines the inner cavity and defines an opening adapted to receive the shaft of the item. An outer elastomeric layer surrounds the outer surface of the shell. In particular embodiments of the handle grip, the outer elastomeric layer is formed with first and second elastomeric materials, which may define different durometer hardnesses. Still further, the inner elastomeric layer may also be formed with the first elastomeric material. In accordance with another aspects of the present invention, methods of making the novel handle grip are also presented.",
  "claims": [
    "1. A hand grip assembly adapted to be situated about a shaft of an item, comprising: a rigid shell defining an outer surface and an inner surface; an inner elastomeric layer substantially lining the entire inner surface and defining an opening adapted to receive the shaft; and an outer elastomeric layer surrounding the outer surface of the rigid shell.",
    "2. The hand grip assembly of claim 1, wherein the outer elastomeric layer comprises first and second elastomeric materials.",
    "3. A hand grip assembly adapted to be situated about a shaft of an item, comprising: a rigid shell defining an outer surface and an inner cavity; an inner elastomeric layer lining the inner cavity and defining an opening adapted to receive the shaft; and an outer elastomeric layer surrounding the outer surface of the rigid shell, the outer elastomeric layer comprising first and second elastomeric materials.",
    "4. The hand grip assembly of claim 1, wherein the inner and outer elastomeric layers each comprise a thermoplastic rubber material.",
    "5. The hand grip assembly of claim 1, wherein the inner elastomeric layer substantially lines the entire inner cavity.",
    "6. The hand grip assembly of claim 1, wherein the first elastomeric material of the outer elastomeric layer is positioned to generally fit in the palm of a user gripping the hand grip assembly.",
    "7. The hand grip assembly of claim 1, wherein the first and second elastomeric materials each define a different hardness.",
    "8. The hand grip assembly of claim 5, wherein the first elastomeric material defines a hardness softer than the second elastomeric material.",
    "9. The hand grip assembly of claim 1, wherein the inner elastomeric layer comprises the first elastomeric material.",
    "10. The hand grip assembly of claim 1, wherein the outer elastomeric layer is adapted to fit one of a right or a left hand.",
    "11. The hand grip assembly of claim 1, wherein the outer surface of the rigid shell defines at least one shut-off member extending therefrom, the shut-off adapted to form a boundary between the first and second elastomeric materials of the outer elastomeric layer."
  ],
  "cpc": [
    "A61K 31/40",
    "B25D 1/12",
    "B25G 1/01"
  ],
  "assignees": [
    "EMERSON ELECTRIC CO"
  ],
  "filing_date": "1999-03-03",
  "publication_date": "2004-07-20",
  "grant_date": "2004-07-20",
  "priority_date": "1997-04-09",
  "application_number": "US-26164399-A",
  "family_id": "32686199",
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}