1554997

Information

• Patent Grant
• 1554997

• References
• Source

• Patent Number

  1,554,997

• Date Filed

  Not available

• Date Issued

  Tuesday, September 29, 1925
  99 years ago

• CPC

  • B21K1/22 - poppet valves
  • B23K5/18 - for purposes other than joining parts
  • B23K31/00 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
  • F01L3/02 - Selecting particular materials for valve-members or valve-seats Valve-members or valve-seats composed of two or more materials
  • Y10T29/49307 - Composite or hollow valve stem or head making

• US Classifications

  • 029 - Metal working
  • 123 - Internal-combustion engines
  • 219 - Electric heating