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| Number | Title | Issue Date |
| 7137484 | Safety system for restraining movement of elevator car when car doors are open A safety system for restraining movement of an elevator car employing a bi-directional safety and an associated car mounted governor with a linkage, between the governor and the elevator car door, including a brake cable and clutch, wherein the governor would operat... | 11/21/2006 |
| 4977982 | Elevator sheave brake safety The cable drive sheave (14) carries a wedge-shaped brake ring (44) engageable with V-shaped brake shoes (52, 58). Each shoe is spring biased (68, 76) tangentially toward the ring and resiliently supported and biased radially (50) toward the ring. The shoe... | 12/18/1990 |
