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Class Information
Number: 187/317
Name: Elevator, industrial lift truck, or stationary lift for vehicle > With barrier for regulating access to load support > Includes motor or motor driven linkage for shifting barrier > With specific electrical control therefor > Includes object detecting sensor or switch on barrier
Description: Subject matter wherein the information input component of the control* is carried by the path blocking means and includes circuit making and breaking means which contacts, or otherwise determines the physical presence of, an object obstructing the course along which the path blocking means moves.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7183533 |
Optical multi-axis optoelectronic sensor |
Feb. 27, 2007 |
| 7156210 |
Freight elevator landing door control |
Jan. 2, 2007 |
| 7140470 |
Safety system for monitoring the state of elevator landing doors |
Nov. 28, 2006 |
| 6945363 |
Method of contactlessly monitoring elevator shaft doors |
Sep. 20, 2005 |
| 6739432 |
Inspection opening in an elevator car |
May. 25, 2004 |
| 6625934 |
Method for monitoring environmental conditions in restricted spaces |
Sep. 30, 2003 |
| 6626268 |
Elevator door opening and closing device and opening and closing control method |
Sep. 30, 2003 |
| 6547042 |
Gap scanning |
Apr. 15, 2003 |
| 6534731 |
Safety edge switch |
Mar. 18, 2003 |
| 6443265 |
Safety device of the elevator door |
Sep. 3, 2002 |
| 6386326 |
Method and system for detecting objects in a detection zone using modulated means |
May. 14, 2002 |
| 6339375 |
Image monitoring apparatus and image monitoring method |
Jan. 15, 2002 |
| 6279687 |
Method and system for detecting objects in a detection zone using modulated means |
Aug. 28, 2001 |
| 6247558 |
Apparatus for reducing power consumption in a elevator door protection system |
Jun. 19, 2001 |
| 6202797 |
Automatic protection of elevator mechanics |
Mar. 20, 2001 |
| 6167991 |
Method and apparatus for detecting position of an elevator door |
Jan. 2, 2001 |
| 6051829 |
Safety detection system for sliding doors |
Apr. 18, 2000 |
| 5925858 |
Safety system for detecting small objects approaching closing doors |
Jul. 20, 1999 |
| 5923005 |
Equipment for approach area monitoring for escalator and travelling walkways |
Jul. 13, 1999 |
| 5900598 |
Lift sensor |
May. 4, 1999 |
| 5896951 |
Optimization of magnetizing current in linear induction motors |
Apr. 27, 1999 |
| 5886307 |
Safety detection system for sliding doors |
Mar. 23, 1999 |
| 5712458 |
Door sensor beam |
Jan. 27, 1998 |
| 5698824 |
Lift installation with primary and secondary transmitter receiver means |
Dec. 16, 1997 |
| 5696362 |
Weak beam detection |
Dec. 9, 1997 |
| 5655627 |
Elevator door restrictor |
Aug. 12, 1997 |
| 5641951 |
Elevator door safety device |
Jun. 24, 1997 |
| 5616895 |
Door safety circuit for monitoring of story doors in lift installations |
Apr. 1, 1997 |
| 5605429 |
Door safety system for storage phosphor cassette autoloader |
Feb. 25, 1997 |
| 5569888 |
Ultrasonic elevator door safety system |
Oct. 29, 1996 |
| 5420430 |
Detection systems for detecting obstructions in doorways |
May. 30, 1995 |
| 5394961 |
Safety edge assembly for elevator doorways |
Mar. 7, 1995 |
| 5250765 |
Apparatus for controlling elevator door |
Oct. 5, 1993 |
| 5162711 |
Elevator door control responsive to obstructions |
Nov. 10, 1992 |
| 5149921 |
Self correcting infrared intrusion detection system |
Sep. 22, 1992 |
| RE33668 |
Detection device having energy transmitters located at vertically spaced apart points along movable doors |
Aug. 20, 1991 |
| 5023418 |
Safety edge switch |
Jun. 11, 1991 |
| 5001557 |
Method of, and apparatus for, controlling the position of an automatically operated door |
Mar. 19, 1991 |
| 4984658 |
Car gate reversing edge |
Jan. 15, 1991 |
| 4983896 |
System for driving and controlling an open-area shield |
Jan. 8, 1991 |
| 4976337 |
Proximity detection systems |
Dec. 11, 1990 |
| 4794248 |
Detection device having energy transmitters located at vertically spaced apart points along movable doors |
Dec. 27, 1988 |
| 4776433 |
Elevator door control system |
Oct. 11, 1988 |
| 4753323 |
Safety system for closing doors |
Jun. 28, 1988 |
| 4742549 |
Procedure for watching over the area in front of a lift |
May. 3, 1988 |
| 4732238 |
Obstacle detection system for automatically controlled elevator doors |
Mar. 22, 1988 |
| 4706227 |
Acoustic obstruction detector and method |
Nov. 10, 1987 |
| 4693340 |
Bumper guide assembly for elevator doors |
Sep. 15, 1987 |
| 4635032 |
Mobile door closure interrupting detector |
Jan. 6, 1987 |
| 4621452 |
Powered sliding door safety system |
Nov. 11, 1986 |
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