US4562830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction device for an endoscope
Assignee: Olympus Corp
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Filing: 1984-12-28
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Granted: 1986-01-07
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Expires: 2004-12-28
Abstract
Abstract A suction device comprises a suction changeover valve provided to a control section of an endoscope and including a cylinder with an opening at one end and a closed wall at the other end, and a piston held in the cylinder in a state movable therethrough and removable through the opening of the cylinder, a first suction tube section formed in the insertion section in a state communicable with the cylinder through the closed wall; and a second tube section formed in a cord of the endoscope in a state communicable with the cylinder through the closed wall. An urging member is projectively provided to the control section, shaped like a cup to cover the opening of the cylinder, and engaged with one end of the piston to elastically hold the piston in the first position.
Inventors
- 👤 Hisao Yabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:31
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/00064; A61B1/00066; A61B1/00068; A61B1/00112; A61B1/00121; A61B1/00128; A61B1/12; A61B1/121; A61B1/122
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
222 words
A suction device for an endoscope, which endoscope includes an insertion section, a control section connected to one end of said insertion section and a cord extending from the control section to the outside, comprising; a suction changeover valve provided on the control section and including a cylinder with a longitudinal passage having a longitudinal axis and a downwardly inclined passage disposed at an angle of less than ninety degrees to said longitudinal axis of said longitudinal passage and intersecting said longitudinal passage, an opening at one end of said passage, said cylinder having a bottom wall and a peripheral wall, said bottom wall having first and second holes adjacent to each other, and a piston held in said longitudinal passage and removable axially through said opening thereof; a first suction tube section extending through the insertion section to communicate with said inclined passage through the first hole of the bottom wall; and a second suction tube section extending through the cord to communicate with said longitudinal passage through the second hole of the bottom wall, whereby a linear cleaning instrument can be inserted through said inclined and longitudinal passages into said first and second holes and first and second suction tube sections without significant deflection of that instrument from a linear configuration when said piston is removed from said longitudinal passage.
Claim 2
Dependent Claim
222 words
A suction device for an endoscope, which endoscope includes an insertion section, a control section connected to one end of said insertion section and a cord extending from the control section to the outside, comprising; a suction changeover valve provided on the control section and including a cylinder with a longitudinal passage having a longitudinal axis and a downwardly inclined passage disposed at an angle of less than ninety degrees to said longitudinal axis of said longitudinal passage and intersecting said longitudinal passage, an opening at one end of said passage, said cylinder having a bottom wall and a peripheral wall, said bottom wall having first and second holes adjacent to each other, and a piston held in said longitudinal passage and removable axially through said opening thereof; a first suction tube section extending through the insertion section to communicate with said inclined passage through the first hole of the bottom wall; and a second suction tube section extending through the cord to communicate with said longitudinal passage through the second hole of the bottom wall, whereby a linear cleaning instrument can be inserted through said inclined and longitudinal passages into said first and second holes and first and second suction tube sections without significant deflection of that instrument from a linear configuration when said piston is removed from said longitudinal passage.
Claim 3
Dependent Claim
105 words
The suction device according to claim 1, wherein said piston includes a peripheral wall defining a communication path extending along a longitudinal axis thereof and communicated with said second suction tube section at one end of said piston, and a communication hole formed in the peripheral wall of the piston to communicate with the communication path, the piston being provided in the cylinder to be movable between a first position where the communication hole is communicated with the atmosphere, and a second position where the first suction tube section is communicated with the second suction tube section through the communication path and the communication hole.
Claim 4
Dependent Claim
37 words
The suction device according to claim 2, which further includes an urging member which projects from the control section and is engaged with one end of the piston to elastically hold the piston in the first position.
Claim 5
Dependent Claim
39 words
The suction device according to claim 3, wherein said urging member is deformable between an extended position where the piston is kept in the first position and a depressed position where the piston is moved into the second position.
Claim 6
Dependent Claim
50 words
The suction device according to claim 2, wherein said second suction tube section is provided in coaxial relation with the piston to always communicate therewith at its end, and said communication hole communicates the second suction tube section to the atmosphere when the piston is located in the first position.
Claim 7
Dependent Claim
45 words
The suction device according to claim 2, in which said cylinder is fixed to the control section, and at least one of the first and second suction tube sections includes a connection tube eccentrically opened into the cylinder in the bottom wall of the cylinder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |