CA2445567A1 - Adaptive load-clamping system - Google Patents

Adaptive load-clamping system Download PDF

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Publication number
CA2445567A1
CA2445567A1 CA002445567A CA2445567A CA2445567A1 CA 2445567 A1 CA2445567 A1 CA 2445567A1 CA 002445567 A CA002445567 A CA 002445567A CA 2445567 A CA2445567 A CA 2445567A CA 2445567 A1 CA2445567 A1 CA 2445567A1
Authority
CA
Canada
Prior art keywords
load
valve
pressure
clamp
maximum
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
CA002445567A
Other languages
French (fr)
Other versions
CA2445567C (en
Inventor
Dean Clark Jordan
Richard D. Seaberg
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.)
Cascade Corp
Original Assignee
Individual
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
Priority claimed from US09/168,358 external-priority patent/US6431816B1/en
Application filed by Individual filed Critical Individual
Priority to CA002563025A priority Critical patent/CA2563025C/en
Priority to CA2651873A priority patent/CA2651873C/en
Priority claimed from CA002421986A external-priority patent/CA2421986C/en
Publication of CA2445567A1 publication Critical patent/CA2445567A1/en
Application granted granted Critical
Publication of CA2445567C publication Critical patent/CA2445567C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Forklifts And Lifting Vehicles (AREA)
  • Gripping On Spindles (AREA)
  • Manipulator (AREA)

Abstract

A fluid power load-clamping system has a clamp actuated by fluid pressure regulated by at least one fluid valve. The valve may increase a maximum fluid pressure automatically in response to a weight of a load. A controller causes the valve to permit a relatively high maximum fluid pressure as the clamp closes toward the load to enable high initial clamp closure speed. Thereafter the valve automatically reduces the maximum pressure as clamping surfaces close into a pre-determined relationship with the load, and then increases the maximum pressure to regulate the gripping force. Gripping pressure may be regulated continuously while the load is supported by the clamp. A weight measurement system may compensate for a position of the lifting mechanism.
CA002445567A 1998-10-07 1999-09-13 Adaptive load-clamping system Expired - Fee Related CA2445567C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002563025A CA2563025C (en) 1998-10-07 1999-09-13 Adaptive load-clamping system
CA2651873A CA2651873C (en) 1998-10-07 1999-09-13 Adaptive load-clamping system

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US09/168,358 US6431816B1 (en) 1998-10-07 1998-10-07 Adaptive load-clamping system
US09/168358 1998-10-07
US09/388,181 US6439826B1 (en) 1998-10-07 1999-09-01 Adaptive load-clamping system
US09/388181 1999-09-01
CA002421986A CA2421986C (en) 1998-10-07 1999-09-13 Adaptive load-clamping system

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002421986A Division CA2421986C (en) 1998-10-07 1999-09-13 Adaptive load-clamping system

Related Child Applications (2)

Application Number Title Priority Date Filing Date
CA2651873A Division CA2651873C (en) 1998-10-07 1999-09-13 Adaptive load-clamping system
CA002563025A Division CA2563025C (en) 1998-10-07 1999-09-13 Adaptive load-clamping system

Publications (2)

Publication Number Publication Date
CA2445567A1 true CA2445567A1 (en) 2000-04-07
CA2445567C CA2445567C (en) 2009-04-07

Family

ID=30003405

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002445567A Expired - Fee Related CA2445567C (en) 1998-10-07 1999-09-13 Adaptive load-clamping system

Country Status (1)

Country Link
CA (1) CA2445567C (en)

Also Published As

Publication number Publication date
CA2445567C (en) 2009-04-07

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EEER Examination request
MKLA Lapsed

Effective date: 20170913