Chain positioner for 10-speed bicycle

{
  "publication_number": "US3862487A",
  "country": "US",
  "kind": "A",
  "title": "Chain positioner for 10-speed bicycle",
  "abstract": "A chain positioner tool for facilitating removal and installation of a wheel having one or more gears assembled thereto, such as the rear wheel on a multi-speed bicycle, driven by a chain and chain tensioner assembly comprising an anchor plate adapted to be secured to the wheel fork, a chain retractor having a plurality of claw-like projections arranged along an arcuate path for supporting the chain free of the gear and a member for holding the chain tensioner in a tension relieving position.",
  "claims": [
    "1. A tool for facilitating removal and installation of a sprocketed wheel having at least one toothed gear driven by a chain and a chain tensioner assembly, said gear being removably carried by a frame, said tool comprising: an anchor plate adapted to be secured to said frame for providing substantially rigid support relative thereto; means for supporting said chain in a stable, retracted position while said gear is removed from the frame, said means comprising a chain retractor including an edge portion having at least one projection engageable with at least one of the intertices of said chain; and means for securing said chain retractor to said anchor plate in said retracted position, whereby said chain is maintained in a stable configuration during the removal of said wheel from the frame and the reinstallation of said wheel in said frame.",
    "2. The apparatus of claim 1 wherein said edge portion of said chain retractor has a generally arcuate shape with a plurality of projections spaced therealong, each said projection being engageable with a different one of a plurality of the interstices of said chain.",
    "3. The apparatus of claim 2 wherein the separation distance between adjacent ones of said projections is substantially equal to the distance between alternate interstices of said chain.",
    "4. The apparatus of claim 1 further including a chain tensioner retractor adapted to be coupled to said chain tensioner for maintaining said tensioner in a tension relieving position on said chain; and means for securing said chain tensioner retractor to said anchor plate.",
    "5. The apparatus of claim 4 wherein said chain tensioner retractor comprises an elongated member having a projection adapted to be engaged with an aperture in said chain tensioner.",
    "6. The apparatus of claim 4 wherein said chain tensioner retractor is provided with means for enabling said chain tensioner retractor to be mounted to said anchor plate in varying locations relative thereto.",
    "7. A tool for facilitating removal and installation of a multi-speed bicycle wheel carried by a frame and having a gear cluster with a plurality of gears associated with a chain and a chain tensioner assembly, said tool comprising; an anchor plate adapted to be secured to said frame for providing a substantially rigid suppoRt relative thereto; a chain retractor for supporting said chain in a retracted position independently of said gear cluster, said retractor including an edge portion having at least one projection engageable with at least one of the interstices of said chain; means for securing said chain retractor to said anchor plate in said retracted position so that said chain is maintained in a configuration wherein at least one of said gears is readily alignable with said interstices when said wheel is installed in said frame; a chain tensioner retractor adapted to be coupled to said chain tensioner for maintaining said tensioner in a position relieving tension on said chain; and means for securing said chain tensioner retractor to said anchor plate.",
    "8. The apparatus of claim 7 wherein said edge portion of said chain retractor has a generally arcuate shape with a plurality of projections spaced therealong, each said projection being engageable with a different one of a plurality of the interstices of said chain.",
    "9. The apparatus of claim 8 wherein the separation distance between adjacent ones of said projections is substantially equal to the distance between alternate interstices of said chain.",
    "10. The apparatus of claim 7 wherein said chain tensioner retractor comprises an elongated member having a projection adapted to be engaged with an aperture in said chain tensioner.",
    "11. The apparatus of claim 7 further including means for enabling said chain retractor and said chain tensioner retractor to each be mounted to said anchor plate in varying locations relative thereto."
  ],
  "description_excerpt": "United States Patent [1 1 Van Gundy 1 CHAIN POSITIONER FOR IO-SPEED BICYCLE [76] inventor: Kenneth Warren Van Gundy, 25 Arroyo Ct., San Mateo, Calif. 94402 221 Filed: Apr. 30, 1973 211 Appl. No.: 356,023 [52] U.S. Cl. 29/270, 29/200 P, 269/47, 269/321 W [5 I] Int. Cl. B25b 27/22 [58] Field of Search 29/200 P, 267, 270, 271, 29/278, 283, 200 D; 269/49, 70, 321 W; 74/217 B, 242.11 B, 242.14 B, 242.15 B [56] References Cited UNITED STATES PATENTS 1,261,164 4/1918 Quinlan 29/267 [451 Jan. 28, 1975 FOREIGN PATENTS OR APPLICATIONS 1,030,589 6/1953 France 74/217 B Primary Examiner-Al Lawrence Smith Assistant Examiner-Harold P. Smith, Jr. Attorney, Agent, or Firm-Townsend & Townsend [57] ABSTRACT A chain positioner tool for facilitating removal and installation of a wheel having one or more gears assembled thereto, such as the rear wheel on a multi-spced bicycle, driven by a chain and chain tensioner assembly comprising an anchor plate adapted to be secured to the wheel fork, a chain retractor having a plurality of claw-like projections arranged along an arcuate path for supporting the chain free of the gear and a member for holding the chain tensioner in a tension relieving position.\n\n11 Claims, 11 Drawing Figures ki V'QIQIQYQ n CHAIN POSITIONER FOR IO-SPEED BICYCLE BACKGROUND OF THE INVENTION 1. FIELD OF THE INVENTION This invention relates to devices having chain driven wheels, such as bicycles, motorcycles and the like. More particularly, this invention relates to chain driven wheels having a device for maintaining proper chain tension.",
  "cpc": [
    "B62M 9/16",
    "B25B 27/22",
    "Y10S 269/909",
    "Y10T 29/53909"
  ],
  "ipc": [
    "B25B 27/22",
    "B62M 9/16"
  ],
  "assignees": [
    "GUNDY KENNETH WARREN VAN"
  ],
  "inventors": [
    "VAN GUNDY KENNETH WARREN"
  ],
  "filing_date": "1973-04-30",
  "publication_date": "1975-01-28",
  "grant_date": "1975-01-28",
  "priority_date": "1973-04-30",
  "application_number": "US-35602373-A",
  "family_id": "23399793",
  "citations": [
    "US1261164A"
  ]
}