WO2005051834A3 - Lift assembly - Google Patents

Lift assembly Download PDF

Info

Publication number
WO2005051834A3
WO2005051834A3 PCT/US2004/039164 US2004039164W WO2005051834A3 WO 2005051834 A3 WO2005051834 A3 WO 2005051834A3 US 2004039164 W US2004039164 W US 2004039164W WO 2005051834 A3 WO2005051834 A3 WO 2005051834A3
Authority
WO
WIPO (PCT)
Prior art keywords
frame
drum
lift assembly
take
block
Prior art date
Application number
PCT/US2004/039164
Other languages
French (fr)
Other versions
WO2005051834A2 (en
Inventor
Donald A Hoffend Jr
Original Assignee
Donald A Hoffend Jr
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 US10/717,886 external-priority patent/US20040098944A1/en
Priority claimed from US10/718,871 external-priority patent/US20040099852A1/en
Application filed by Donald A Hoffend Jr filed Critical Donald A Hoffend Jr
Priority to EP20040811819 priority Critical patent/EP1697250B1/en
Publication of WO2005051834A2 publication Critical patent/WO2005051834A2/en
Publication of WO2005051834A3 publication Critical patent/WO2005051834A3/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54—Safety gear
    • B66D1/56—Adaptations of limit switches
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63J—DEVICES FOR THEATRES, CIRCUSES, OR THE LIKE; CONJURING APPLIANCES OR THE LIKE
    • A63J1/00—Stage arrangements
    • A63J1/02—Scenery; Curtains; Other decorations; Means for moving same
    • A63J1/028—Means for moving hanging scenery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/26—Rope, cable, or chain winding mechanisms; Capstans having several drums or barrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/36—Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/36—Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
    • B66D1/39—Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains by means of axially-movable drums or barrels

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Types And Forms Of Lifts (AREA)
  • Body Structure For Vehicles (AREA)
  • Harvester Elements (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)

Abstract

A lift assembly (10) having a drum (160) rotatably mounted to a frame (20) and linearly translatable with respect to the frame (20). A plurality of head blocks (80) are connected to the frame (20) along a helical mounting path, wherein linear translation of the drum (160) during takeoff or take-up maintains a predetermined fleet angle between a take off point from the drum (160) and the head block (80). A loft block (220) is disposed within the frame (920) for defining a vertical cable path from within a footprint of the frame.
PCT/US2004/039164 2003-11-20 2004-11-22 Lift assembly WO2005051834A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20040811819 EP1697250B1 (en) 2003-11-20 2004-11-22 Lift assembly

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US10/717,886 2003-11-20
US10/717,886 US20040098944A1 (en) 2000-07-28 2003-11-20 Batten for lift assembly
US10/718,871 2003-11-21
US10/718,871 US20040099852A1 (en) 2000-07-28 2003-11-21 Modular lift assembly

Publications (2)

Publication Number Publication Date
WO2005051834A2 WO2005051834A2 (en) 2005-06-09
WO2005051834A3 true WO2005051834A3 (en) 2005-11-24

Family

ID=34636728

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/039164 WO2005051834A2 (en) 2003-11-20 2004-11-22 Lift assembly

Country Status (2)

Country Link
EP (2) EP2896591A1 (en)
WO (1) WO2005051834A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9340396B2 (en) 2013-11-22 2016-05-17 Electronic Theatre Controls, Inc. Nested lift assemblies

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4772923A (en) * 1987-06-25 1988-09-20 Itek Graphix Corp. Automatically operated vacuum feed and hold down assembly for camera system
US4802787A (en) * 1986-12-12 1989-02-07 Mertz, Inc. Electrical control system
US4814832A (en) * 1988-01-28 1989-03-21 Itek Graphix Corp. Automatic vacuum feed and hold down assembly for camera system
US5555695A (en) * 1989-06-05 1996-09-17 Patsy, Jr.; Glorio J. Extrusions providing for low deformability
US6634622B1 (en) * 2000-07-28 2003-10-21 Donald A. Hoffend, Jr. Modular lift assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6988716B2 (en) * 2000-07-28 2006-01-24 Hoffend Jr Donald A Modular lift assembly
US6520485B1 (en) * 2000-10-13 2003-02-18 Olaf Soot Winch system for raising and lowering theatre scenery
DE10117466B4 (en) * 2001-04-06 2005-11-10 Pfaff-Silberblau Hebezeugfabrik Gmbh & Co. Electric winch for use as a stage winch or the like

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4802787A (en) * 1986-12-12 1989-02-07 Mertz, Inc. Electrical control system
US4772923A (en) * 1987-06-25 1988-09-20 Itek Graphix Corp. Automatically operated vacuum feed and hold down assembly for camera system
US4814832A (en) * 1988-01-28 1989-03-21 Itek Graphix Corp. Automatic vacuum feed and hold down assembly for camera system
US5555695A (en) * 1989-06-05 1996-09-17 Patsy, Jr.; Glorio J. Extrusions providing for low deformability
US6634622B1 (en) * 2000-07-28 2003-10-21 Donald A. Hoffend, Jr. Modular lift assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1697250A4 *

Also Published As

Publication number Publication date
WO2005051834A2 (en) 2005-06-09
EP1697250A2 (en) 2006-09-06
EP1697250A4 (en) 2009-06-03
EP2896591A1 (en) 2015-07-22
EP1697250B1 (en) 2015-05-06

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