Battens system for raising and lowering sceneries or similar loads on a stage

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4324386
SERIAL NO

06151280

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A battens system for raising and lowering sceneries or similar loads on a stage is disclosed. The system comprises a series of support members adapted to be secured to the joists of a ceiling, an elongated winch drum made up of several sections interconnected by universal joints and supported in horizontal position by said support members, each winch drum section being provided over part of its length with a helical groove on which a cable for supporting the load is wound. Each support member carries bearing wheels engaging the helical grooves for rotatably supporting the winch drum and for causing its axial displacement at each turn by a distance equal to the pitch of the cable wound or unwound from the winch drum, such that the load will not be laterally shifted when being raised or lowered. The shaft of a reversible hydraulic motor is secured to an end of the winch drum, whereby the hydraulic motor moves with the winch drum in its axial movement. The housing of the hydraulic motor is provided with a torque arm engaging a stationary guide extending parallel to the winch drum to prevent rotation of the motor housing. The hydraulic motor is controlled by a three-position spool valve, the position of which is controlled by a reversible electric stepping motor. Movement differential between the stepping motor and the winch drum produces progressive closing and opening of the valve which results in smooth acceleration and deceleration of the load during raising or lowering, and an accurate positioning of the load. A brake is preferably provided to stop the winch drum when the hydraulic motor is not supplied with fluid under pressure.

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First Claim

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Patent Owner(s)

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International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gagnon, Pierre 5637 Wilderton St., Montreal, Quebec, CA 30 184
LaForest, Pierre 1945 Bruxelles St., Montreal, Quebec, CA 22 172

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Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (7)
* 4662628 Device for maneuvering scenery 28 1985
* 5254040 Handball - squash court conversion system 10 1991
7264227 Self-climbing stage light support 6 2004
* 2005/0104,053 Self-climbing stage light support 0 2004
* 2006/0180,564 Compact hoist for drilling or workover rig 8 2005
* 8636265 Winch for raising and lowering theater scenery 0 2010
* 8596616 Winch for raising and lowering theatre scenery 1 2011
 
LINCOLN GLOBAL, INC. (1)
* 6422536 Lifter apparatus for raising and lowering a part 6 2000
 
ELECTRONIC THEATRE CONTROLS, INC. (20)
* 6988716 Modular lift assembly 20 2002
* 2003/0111,652 Modular lift assembly 4 2002
6889958 Brake for hoist assembly 32 2003
* 2004/0084,665 Brake for hoist assembly 1 2003
6997442 Safety sensor for a lift assembly 20 2004
7258325 Modular lift assembly 2 2006
* 2006/0169,662 Modular lift assembly 5 2006
7484715 Modular lift assembly having telescoping member 1 2006
* 2007/0246,695 Modular lift assembly having telescoping member 2 2006
7293762 Modular lift assembly 3 2006
* 2007/0001,158 MODULAR LIFT ASSEMBLY 7 2006
* 7854423 Modular lift assembly 3 2008
* 2009/0045,381 MODULAR LIFT ASSEMBLY 3 2008
7810792 Modular lift assembly having telescoping member 1 2008
* 2009/0146,120 MODULAR LIFT ASSEMBLY HAVING TELESCOPING MEMBER 0 2008
8047507 Modular lift assembly 2 2010
* 2011/0001,101 MODULAR LIFT ASSEMBLY 2 2010
8286946 Modular lift assembly 1 2011
* 8789814 Modular lift assembly 0 2012
* 2013/0001,488 MODULAR LIFT ASSEMBLY 2 2012
 
LFK ENGINEERING LLC (1)
* 9572427 Motorized home storage system 0 2014
 
OLAF SOOT DESIGN, LLC (1)
6520485 Winch system for raising and lowering theatre scenery 35 2000
 
HOFFEND & SONS, INC. (2)
* 2004/0098,944 Batten for lift assembly 14 2003
* 2004/0099,852 Modular lift assembly 17 2003
 
Aalco Manufacturing Company (2)
* 7297076 Method and apparatus for retractable enclosure 1 2003
* 2005/0101,419 Method and apparatus for retractable enclosure 1 2003
 
J.R. CLANCY, INC. (4)
* 8002243 Configurable winch 4 2008
* 2009/0212,269 CONFIGURABLE WINCH 1 2008
7766308 Theater rigging system 9 2009
* 2009/0140,221 Theater Rigging System 9 2009
 
INTUITIVE SURGICAL OPERATIONS, INC. (2)
* 8151661 Compact capstan 3 2006
* 2008/0009,838 COMPACT CAPSTAN 41 2006
 
PRODUCTION RESOURCE GROUP, L.L.C. (2)
* 6385493 Computer controlled winch assembly for stage 12 2000
* 6547670 Stage element movement assembly 3 2002
 
Warn Industries, Inc. (1)
* 2011/0180,770 Light Weight Winch 8 2011
 
Beo Brackman Electronics & Optics B.V. (1)
* 6729605 Cable winch hoisting device for stages 5 2002
* Cited By Examiner