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CA2023574A1 - Articulating stairway - Google Patents

Articulating stairway

Info

Publication number
CA2023574A1
CA2023574A1 CA 2023574 CA2023574A CA2023574A1 CA 2023574 A1 CA2023574 A1 CA 2023574A1 CA 2023574 CA2023574 CA 2023574 CA 2023574 A CA2023574 A CA 2023574A CA 2023574 A1 CA2023574 A1 CA 2023574A1
Authority
CA
Canada
Prior art keywords
stairway
rails
articulating
pair
parallel
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 2023574
Other languages
French (fr)
Other versions
CA2023574C (en
Inventor
Raymond Amos Peterson
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.)
Thiessen Equipment Ltd
Original Assignee
Thiessen Equipment Ltd
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 Thiessen Equipment Ltd filed Critical Thiessen Equipment Ltd
Publication of CA2023574A1 publication Critical patent/CA2023574A1/en
Application granted granted Critical
Publication of CA2023574C publication Critical patent/CA2023574C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Escalators And Moving Walkways (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

An articulating stairway, having a first pair of horizontally spaced, parallel rails and a second pair of horizontally spaced, parallel rails aligned above the first pair of rails. A plurality of treads are provided, with each tread being pivotally connected between the first and second pairs of rails on two vertically aligned, parallel, horizontal axes. The axes remain vertically aligned as one end of the stairway pivots above or below the other end of the stairway, keeping the treads level throughout.
CA 2023574 1990-06-25 1990-08-17 Articulating stairway Expired - Fee Related CA2023574C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54327290A 1990-06-25 1990-06-25
US543,272 1990-06-25

Publications (2)

Publication Number Publication Date
CA2023574A1 true CA2023574A1 (en) 1991-12-26
CA2023574C CA2023574C (en) 1994-10-11

Family

ID=24167301

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2023574 Expired - Fee Related CA2023574C (en) 1990-06-25 1990-08-17 Articulating stairway

Country Status (1)

Country Link
CA (1) CA2023574C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6256946B1 (en) * 1999-10-04 2001-07-10 Jack Kennedy Metal Products And Buildings, Inc. Adjustable stairway for use with an overcast in a mine
CN110155269A (en) * 2019-05-29 2019-08-23 浙江国际海运职业技术学院 Marine step ladder
CN114135217A (en) * 2021-10-13 2022-03-04 福建海电运维科技有限责任公司 Telescopic ladder for boarding

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6256946B1 (en) * 1999-10-04 2001-07-10 Jack Kennedy Metal Products And Buildings, Inc. Adjustable stairway for use with an overcast in a mine
CN110155269A (en) * 2019-05-29 2019-08-23 浙江国际海运职业技术学院 Marine step ladder
CN114135217A (en) * 2021-10-13 2022-03-04 福建海电运维科技有限责任公司 Telescopic ladder for boarding
CN114135217B (en) * 2021-10-13 2023-07-21 福建海电运维科技股份有限公司 Boarding telescopic ladder

Also Published As

Publication number Publication date
CA2023574C (en) 1994-10-11

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed