David W. Barrett

Person

East Hartland, CT, US

People

Patents Grantslast 30 patents

Information Patent Grant
Elevator door brake, brake, lock, and hold-open
- Patent number 5,880,414
- Issue date Mar 9, 1999
- Otis Elevator Company
- Jerome F. Jaminet
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Elevator system with overlapped roped-coupler segments
- Patent number 5,857,545
- Issue date Jan 12, 1999
- Otis Elevator Company
- David W. Barrett
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Elevator cars switch hoistways while traveling vertically
- Patent number 5,816,368
- Issue date Oct 6, 1998
- Otis Elevator Company
- David W. Barrett
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Triac drive for three-phase line-powered linear induction motor ele...
- Patent number 5,808,246
- Issue date Sep 15, 1998
- Otis Elevator Company
- Richard E. Peruggi
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Elevator door drive using dual secondary linear induction motor
- Patent number 5,736,693
- Issue date Apr 7, 1998
- Otis Elevator Company
- Zbigniew Piech
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Elevator car evacuation deterrent device
- Patent number 5,732,796
- Issue date Mar 31, 1998
- Otis Elevator Company
- Edward E. Ahigian
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Time-optimal control of an AC line-driven linear motor elevator doo...
- Patent number 5,682,023
- Issue date Oct 28, 1997
- Otis Elevator Company
- Thomas M. McHugh
- G05 - CONTROLLING REGULATING
Information Patent Grant
Elevator hoistway door bolt lock
- Patent number 5,669,465
- Issue date Sep 23, 1997
- Otis Elevator Company
- Richard E. Kulak
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Elevator cab door drive system
- Patent number 5,668,355
- Issue date Sep 16, 1997
- Otis Elevator Company
- Jerome F. Jaminet
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Stationary actuator moving vane elevator car door coupling
- Patent number 5,651,428
- Issue date Jul 29, 1997
- Otis Elevator Company
- Edward E. Ahigian
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Elevator door coupling and hold-close apparatus
- Patent number 5,651,427
- Issue date Jul 29, 1997
- Otis Elevator Company
- Richard E. Kulak
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Linear induction motor door drive assembly for elevators
- Patent number 5,612,518
- Issue date Mar 18, 1997
- Otis Elevator Company
- Jerome F. Jaminet
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Rotationally stiff elevator car door coupling
- Patent number 5,538,106
- Issue date Jul 23, 1996
- Otis Elevator Company
- Thomas M. McHugh
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Velocity regulated, open current loop, variable voltage, variable f...
- Patent number 5,509,504
- Issue date Apr 23, 1996
- Otis Elevator Company
- Thomas M. McHugh
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Maintaining open loop current drive to linear induction motor
- Patent number 5,503,248
- Issue date Apr 2, 1996
- Otis Elevator Company
- Richard E. Peruggi
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Smooth and quiet linear induction motor elevator door operation
- Patent number 5,495,918
- Issue date Mar 5, 1996
- Otis Elevator Company
- Richard E. Peruggi
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Elevator door mounting system
- Patent number 5,494,137
- Issue date Feb 27, 1996
- Otis Elevator Company
- Thomas M. Kowalczyk
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Magnetic elevator door coupling
- Patent number 5,487,449
- Issue date Jan 30, 1996
- Otis Elevator Company
- David W. Barrett
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Rotary elevator car door coupling
- Patent number 5,485,896
- Issue date Jan 23, 1996
- Otis Elevator Company
- Thomas M. Kowalczyk
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Elevator hoistway door bolt lock
- Patent number 5,454,447
- Issue date Oct 3, 1995
- Otis Elevator Company
- Richard E. Kulak
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Cammed wedge elevator car door coupling
- Patent number 5,435,415
- Issue date Jul 25, 1995
- Otis Elevator Company
- Richard E. Kulak
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Linear door motor system for elevators
- Patent number 5,373,120
- Issue date Dec 13, 1994
- Otis Elevator Company
- David W. Barrett
- B66 - HOISTING LIFTING HAULING

David W. Barrett

Person

Patents Grantslast 30 patents

Elevator door brake, brake, lock, and hold-open

Elevator system with overlapped roped-coupler segments

Elevator cars switch hoistways while traveling vertically

Triac drive for three-phase line-powered linear induction motor ele...

Elevator door drive using dual secondary linear induction motor

Elevator car evacuation deterrent device

Time-optimal control of an AC line-driven linear motor elevator doo...

Elevator hoistway door bolt lock

Elevator cab door drive system

Stationary actuator moving vane elevator car door coupling

Elevator door coupling and hold-close apparatus

Linear induction motor door drive assembly for elevators

Rotationally stiff elevator car door coupling

Velocity regulated, open current loop, variable voltage, variable f...

Maintaining open loop current drive to linear induction motor

Smooth and quiet linear induction motor elevator door operation

Elevator door mounting system

Magnetic elevator door coupling

Rotary elevator car door coupling

Elevator hoistway door bolt lock

Cammed wedge elevator car door coupling

Linear door motor system for elevators