CA2126948A1 - Sealing system for an unloader - Google Patents
Sealing system for an unloaderInfo
- Publication number
- CA2126948A1 CA2126948A1 CA 2126948 CA2126948A CA2126948A1 CA 2126948 A1 CA2126948 A1 CA 2126948A1 CA 2126948 CA2126948 CA 2126948 CA 2126948 A CA2126948 A CA 2126948A CA 2126948 A1 CA2126948 A1 CA 2126948A1
- Authority
- CA
- Canada
- Prior art keywords
- stem
- plug
- bellows member
- bellows
- unloader
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Diaphragms And Bellows (AREA)
- Sealing Devices (AREA)
- Pipe Accessories (AREA)
- Ship Loading And Unloading (AREA)
Abstract
A sealing system for a plug-type unloader includes a bonnet having a guide bore with a stem reciprocably mounted within the guide bore. One end of the stem is affixed to a plug and the other end of the stem is connected to an actuator. A bellows member is positioned around the stem within the plug. The bellows member includes an expandable and contractible bellows having one end attached to the bonnet and the other end attached to the stem. Static seals are provided between one end and the bonnet and the other end and the stem. The bellows between the ends allows the bellows member to expand and contract as the stem reciprocates within the unloader. No dynamic seals are required. The plug of an unbalanced unloader includes a bore slidingly receiving an adapter around the bellows member to protect the bellows member from the pressure pulsations around the plug.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8556793A | 1993-06-30 | 1993-06-30 | |
US08/085,567 | 1993-06-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2126948A1 true CA2126948A1 (en) | 1994-12-31 |
CA2126948C CA2126948C (en) | 2006-06-27 |
Family
ID=22192488
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2126948 Expired - Lifetime CA2126948C (en) | 1993-06-30 | 1994-06-28 | Sealing system for an unloader |
Country Status (2)
Country | Link |
---|---|
CA (1) | CA2126948C (en) |
MX (1) | MX9405004A (en) |
-
1994
- 1994-06-28 CA CA 2126948 patent/CA2126948C/en not_active Expired - Lifetime
- 1994-06-30 MX MX9405004A patent/MX9405004A/en unknown
Also Published As
Publication number | Publication date |
---|---|
CA2126948C (en) | 2006-06-27 |
MX9405004A (en) | 1995-01-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20140630 |