CA832799A - Variable counterbalance for vertical lift doors - Google Patents

Variable counterbalance for vertical lift doors

Info

Publication number
CA832799A
CA832799A CA832799A CA832799DA CA832799A CA 832799 A CA832799 A CA 832799A CA 832799 A CA832799 A CA 832799A CA 832799D A CA832799D A CA 832799DA CA 832799 A CA832799 A CA 832799A
Authority
CA
Canada
Prior art keywords
vertical lift
lift doors
variable counterbalance
counterbalance
variable
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.)
Expired
Application number
CA832799A
Inventor
L. Urquhart Thornton
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.)
BYRNE DOORS
Original Assignee
BYRNE DOORS
Publication date
Application granted granted Critical
Publication of CA832799A publication Critical patent/CA832799A/en
Expired legal-status Critical Current

Links

CA832799A Variable counterbalance for vertical lift doors Expired CA832799A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA832799T

Publications (1)

Publication Number Publication Date
CA832799A true CA832799A (en) 1970-01-27

Family

ID=36310258

Family Applications (1)

Application Number Title Priority Date Filing Date
CA832799A Expired CA832799A (en) Variable counterbalance for vertical lift doors

Country Status (1)

Country Link
CA (1) CA832799A (en)

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