Mechanically expanding climbing aid

  • US 4,643,377 A
  • Filed: 09/26/1985
  • Issued: 02/17/1987
  • Est. Priority Date: 09/26/1985
  • Status: Expired due to Term
First Claim
Patent Images

1. A climbing aid comprising:

  • opposing cam members,two axles having separate, parallel centerlines on which said cam members pivot with crossed radii,axle joining member,rope attachment member,forcing means for expanding said cam members, andoperating means for retracting said cam members.

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