CA2126948A1 - Sealing system for an unloader - Google Patents

Sealing system for an unloader

Info

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
Application number
CA 2126948
Other languages
French (fr)
Other versions
CA2126948C (en
Inventor
James Earl Sternenberg
Richard Everett Shaw
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cooper Machinery Services LLC
Original Assignee
Cooper Industries LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cooper Industries LLC filed Critical Cooper Industries LLC
Publication of CA2126948A1 publication Critical patent/CA2126948A1/en
Application granted granted Critical
Publication of CA2126948C publication Critical patent/CA2126948C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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.
CA 2126948 1993-06-30 1994-06-28 Sealing system for an unloader Expired - Lifetime CA2126948C (en)

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)

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