CA2563025A1 - Adaptive load-clamping system - Google Patents

Adaptive load-clamping system Download PDF

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Publication number
CA2563025A1
CA2563025A1 CA002563025A CA2563025A CA2563025A1 CA 2563025 A1 CA2563025 A1 CA 2563025A1 CA 002563025 A CA002563025 A CA 002563025A CA 2563025 A CA2563025 A CA 2563025A CA 2563025 A1 CA2563025 A1 CA 2563025A1
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
CA002563025A
Other languages
French (fr)
Other versions
CA2563025C (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 claimed from CA002445567A external-priority patent/CA2445567C/en
Publication of CA2563025A1 publication Critical patent/CA2563025A1/en
Application granted granted Critical
Publication of CA2563025C publication Critical patent/CA2563025C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Forklifts And Lifting Vehicles (AREA)
  • Manipulator (AREA)
  • Gripping On Spindles (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.
CA002563025A 1998-10-07 1999-09-13 Adaptive load-clamping system Expired - Fee Related CA2563025C (en)

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
CA002445567A CA2445567C (en) 1998-10-07 1999-09-13 Adaptive load-clamping system

Related Parent Applications (1)

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

Publications (2)

Publication Number Publication Date
CA2563025A1 true CA2563025A1 (en) 2000-04-07
CA2563025C CA2563025C (en) 2009-04-28

Family

ID=37545718

Family Applications (1)

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

Country Status (1)

Country Link
CA (1) CA2563025C (en)

Also Published As

Publication number Publication date
CA2563025C (en) 2009-04-28

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Effective date: 20170913