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US3788558A Expired / Lapsed US ⏱️ 0.0 years remaining

Cutting torch

Assignee: Koike Sanso Kogyo Co Ltd
•
Filing: 1972-10-27
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Granted: 1974-01-29
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Expires: 1992-10-27
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Abstract

Abstract A cutting torch of divergent nozzle type having a primary cutting oxygan passage, a plurality of secondary cutting oxygen passages arranged in a ring-like form surrounding said primary cutting oxygen passage at the cutting tip, and at least one preheating flame passage arranged to surround said secondary cutting oxygen passages, said primary cutting oxygen passage having an intermediate reduced diameter portion terminating in a flared portion open at a circular nozzle outlet, and the jet of the secondary cutting oxygen from said secondary cutting oxygen passages being adapted to provide an apparent cutting oxygen outlet with a diameter equal to the inner diameter of the ring defined by said secondary cutting oxygen passages.

Inventors

  • 👤 A Ujiie
  • 👤 H Shimoyama
  • 👤 N Ueda

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 21:28
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/48; F23D14/52; F23D14/54; Y; Y10; Y10S; Y10S266/00; Y10S266/904

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 113 words
A cutting torch of divergent nozzle type having a primary cutting oxygen passage, a plurality of secondary cutting oxygen passages arranged in a ring-like form surrounding said primary cutting oxygen passage at the cutting tip, and at least one preheating flame passage arranged to surround said secondary cutting oxygen passages, said primary cutting oxygen passage having an intermediate reduced diameter portion terminating in a flare portion open at a circular nozzle outlet, and the jet of the secondary cutting oxygen from said secondary cutting oxygen passages being adapted to provide an apparent cutting oxygen outlet with a diameter equal to the inner diameter of the ring defined by said secondary cutting oxygen passages.
Claim 2
Dependent Claim 113 words
A cutting torch of divergent nozzle type having a primary cutting oxygen passage, a plurality of secondary cutting oxygen passages arranged in a ring-like form surrounding said primary cutting oxygen passage at the cutting tip, and at least one preheating flame passage arranged to surround said secondary cutting oxygen passages, said primary cutting oxygen passage having an intermediate reduced diameter portion terminating in a flare portion open at a circular nozzle outlet, and the jet of the secondary cutting oxygen from said secondary cutting oxygen passages being adapted to provide an apparent cutting oxygen outlet with a diameter equal to the inner diameter of the ring defined by said secondary cutting oxygen passages.

References Cited (Backward Citations)

US3484044A Cited
US3339616A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-01-28 1977-07-30 1978-01-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-01-28 1981-07-30 1982-01-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-01-28 1985-07-30 1986-01-29 $7700.00 Window Closed / Lapsed

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