One piece hydraulic disc brake caliper with one way plumbing

{
  "publication_number": "US9057395B2",
  "country": "US",
  "kind": "B2",
  "title": "One piece hydraulic disc brake caliper with one way plumbing",
  "abstract": "A bolt for use with a hydraulic disc brake caliper. The bolt includes a head and a shaft extending outwardly from the head. The shaft includes a threaded portion having a diameter, at least one channel defined in the outer surface of the threaded portion, first and second reduced diameter portions defined at least partially circumferentially around the shaft and a blocking portion separating the first and second reduced diameter portions.",
  "claims": [
    "1. A bolt for use with a hydraulic disc brake caliper, the bolt comprising: a head, and a shaft extending outwardly from the head and defining a longitudinal axis, wherein the shaft includes a threaded portion formed at a distal end thereof, wherein the threaded portion has an outer surface and having a diameter, at least one channel defined in the outer surface of the threaded portion and the distal end of the shaft, such that when the threaded portion is threaded into an opening fluid can flow through the channel in a generally axial direction and past the distal end of the shaft, first and second reduced diameter portions defined at least partially circumferentially around the shaft, wherein the first and second reduced diameter portions have approximately the same diameter, and a blocking portion separating the first and second reduced diameter portions.",
    "2. The bolt of claim 1 wherein the at least one channel extends parallel to the axis of the shaft.",
    "3. The bolt of claim 2 wherein the shaft includes more than one channel defined therein that extend parallel to the longitudinal axis of the shaft.",
    "4. The bolt of claim 3 wherein the first and second reduced diameter portions extend circumferentially around the shaft and have a diameter that is less than the threaded portion and the blocking portion.",
    "5. The bolt of claim 4 wherein the first and second reduced diameter portions and the blocking portion are positioned between the threaded portion and the head.",
    "6. The bolt of claim 4 wherein the shaft includes three channels that extend parallel to the longitudinal axis of the shaft and are spaced about 120° apart from one another.",
    "7. The bolt of claim 2 wherein the channel has a generally constant depth in a generally axial direction.",
    "8. The bolt of claim 7 wherein the channel extends axially through the entire threaded portion and at least partially in the first reduced diameter portion.",
    "9. The bolt of claim 1 wherein the threaded portion includes a plurality of crests, and wherein the threaded portion has a generally constant diameter at the crests.",
    "10. A bolt for use with a hydraulic disc brake caliper, the bolt comprising: a head, and a shaft extending outwardly from the head and defining a longitudinal axis, wherein the shaft includes a threaded portion formed at a distal end thereof, a plurality of channels defined in the outer surface of the shaft and extending approximately parallel to the longitudinal axis of the shaft, first and second reduced diameter portions defined circumferentially around the shaft, wherein the first and second reduced diameter portions have approximately the same diameter, and a blocking portion separating the first and second reduced diameter portions, wherein the first and second reduced diameter portions and the blocking portion are positioned between the threaded portion and the head, and wherein the channels extend from the first reduced diameter, through the threaded portion and through the distal end of the shaft, such that when the threaded portion is threaded into an opening fluid can flow through the channels in a direction that is generally parallel to longitudinal axis of the shaft and past the distal end of the shaft.",
    "11. The bolt of claim 10 wherein the channels have a generally constant depth in a direction that is generally parallel to the longitudinal axis of the shaft.",
    "12. The bolt of claim 11 wherein the shaft includes three channels that extend parallel to the longitudinal axis of the shaft and are spaced about 120° apart from one another."
  ],
  "description_excerpt": "The present invention relates to hydraulic disc brakes, and more particularly, to a hydraulic disc brake caliper with one way plumbing.\n\nIn recent years, certain high performance bicycles have included hydraulic disc brakes. Hydraulic disc brake systems typically include a caliper housing, a first movable brake pad and a second fixed or movable brake pad. The movable brake pad is typically attached to a piston that is movable in response to fluid pressure applied via a hydraulic fluid conduit in the caliper housing. The brake pads are positioned on either side of a rotor, which is attached to the front or back wheel of a bicycle. Upon the application of fluid pressure to the piston or pistons, the brake pads come into contact with the rotor, thereby applying frictional resistance and causing the bicycle to slow down or stop.\n\nHydraulic disc brake systems for bicycles are typically actuated by a brake lever attached to a bicycle handlebar. They also typically include a master piston in a master cylinder which is actuated by the brake lever. The master cylinder contains a hydraulic fluid and is in fluid communication with the disc brake caliper via a fluid conduit. The brake pads are typically spaced apart from the rotor by a predetermined gap. As the lever is contracted towards the handlebar, the master piston moves, thereby forcing liquid out of the master cylinder and into a conduit connected to the caliper housing. The movement of fluid into caliper housing causes the pistons to move, eventually bringing the brake pads into contact with the rotor.",
  "cpc": [
    "F16B 35/02",
    "B60T 11/16",
    "B60T 7/102",
    "F16D 2125/04",
    "F16D 2125/06",
    "F16D 2125/16",
    "F16D 55/228"
  ],
  "ipc": [
    "B60T 11/16",
    "B60T 7/10",
    "F16B 35/02",
    "F16D 125/04",
    "F16D 125/06",
    "F16D 125/16",
    "F16D 55/228",
    "F16D 65/18"
  ],
  "assignees": [
    "Shimano Inc"
  ],
  "inventors": [
    "Takahiro Yamashita",
    "Shinichi Takizawa"
  ],
  "filing_date": "2013-07-01",
  "publication_date": "2015-06-16",
  "grant_date": "2015-06-16",
  "priority_date": "2009-07-06",
  "application_number": "US-201313933065-A",
  "family_id": "43307957",
  "cited_by_count": 0,
  "citations": [
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  ]
}