Guide tube for industrial endoscope

• US 4,630,649 A
• Filed: 04/26/1985
• Issued: 12/23/1986
• Est. Priority Date: 05/02/1984
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Machida Seisakusho
• Original Assignee: Kabushiki Kaisha Machida Seisakusho
• Inventors: Oku, Toshio
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Peters, Leo James
• Application Number:
  US06/727,545
• Time in Patent Office: 606 Days
• Field of Search: 138/119-122, 138/131, 138/135, 15/104.3 SN, 15/104.3 R, 15/257 R, D32/14, 128/3-8, 356/241
• US Class Current: 138/122
• CPC Class Codes: G02B 23/16 Housings; Caps; Mountings; Supports, e.g. with counterweight
• CPC Class Codes: G02B 23/2476 Non-optical details, e.g. housings, mountings, supports

Abstract

A guide tube for guiding the movement of an endoscope into a passageway includes a tubular body having a front end slanted with respect to an axis thereof. At least that portion of the tubular body adjacent to said front end is axially compressible resiliently and resiliently bendable.

Claims

1. A guide tube for guiding the movement of an endoscope into a passageway which comprises a tubular body having:

a front end slanted with respect to an axis thereof, at least that portion of said tubular body adjacent to said front end being axially compressible resiliently and resiliently bendable, and

a strip formed into a spiral configuration, each adjacent turns of said spiral strip being movable toward each other a predetermined distance to allow the axial compression of said body, said strip having a pair of first and second engaging portions formed along opposite lateral edges thereof, said first and second engaging portions of each adjacent turns of said spiral strip being engaged with each other in a manner to hold the spiral strip in a slightly axially compressed condition.

2. A guide tube according to claim 1, in which said strip has a generally S-shaped cross-section.

3. A guide tube for guiding the movement of an endoscope into a passageway which comprises a tubular body having:

a front end slanted with respect to an axis thereof, at least that portion of said tubular body adjacent to said front end being axially compressible resiliently and resiliently bendable,

an outer tube axially compressible and bendable, and

a spiral tube mounted within said outer tube and made of a flat strip formed into a spiral configuration, each adjacent turns of said spiral tube being spaced from each other a predetermined distance so as to be movable toward each other to allow the axial compression of said body, said spiral tube being held in a slightly axially compressed condition, and said spiral tube being resiliently bendable.