3484931

Information

• Patent Grant
• 3484931

• References
• Source

• Patent Number

  3,484,931

• Date Filed

  Not available

• Date Issued

  Tuesday, December 23, 1969
  55 years ago

• CPC

  • E06C7/085 - achieved by deforming the rung or the stile
  • B21D39/06 - of tubes in openings
  • B21D39/063 - for assembling ladders
  • Y10T29/49927 - Hollow body is axially joined cup or tube
  • Y10T29/49934 - by axially applying force
  • Y10T29/4994 - Radially expanding internal tube
  • Y10T29/49945 - by driven force fit

• US Classifications

  • 029 - Metal working
  • 182 - Fire escape, ladder, or scaffold