Lock for doors
First Claim
1. A lock for a door comprising lock opening control means comprising a mechanical control device located at a distance from the lock and a mechanical transmission connecting the mechanical control device to the lock, said mechanical transmission including a mechanical element connected to said mechanical control device and a shape memory actuator connected to said mechanical element and said lock so that said lock can be opened both by operating said mechanical control device wherein the shape memory actuator works as a mechanical element in said mechanical transmission and by operating the shape memory actuator alone, wherein said shape memory actuator comprises a shape memory wire and means for supplying electrical current through the wire so as to heat the shape memory wire and make said wire contract to open said lock.
1 Assignment
0 Petitions
Accused Products
Abstract
A lock for doors, for example doors of homes, offices, hotel rooms or similar, as well as doors of motor vehicles, includes a lock opening control assembly having a control device located at a distance from the lock and a mechanical transmission connecting the control device to the lock. A shape memory actuator is arranged in between the mechanical transmission, so that the lock can be opened both by operating the shape memory actuator, and by operating the control device, in which case the shape memory actuator works simply as a mechanical transmission element.
77 Citations
8 Claims
- 1. A lock for a door comprising lock opening control means comprising a mechanical control device located at a distance from the lock and a mechanical transmission connecting the mechanical control device to the lock, said mechanical transmission including a mechanical element connected to said mechanical control device and a shape memory actuator connected to said mechanical element and said lock so that said lock can be opened both by operating said mechanical control device wherein the shape memory actuator works as a mechanical element in said mechanical transmission and by operating the shape memory actuator alone, wherein said shape memory actuator comprises a shape memory wire and means for supplying electrical current through the wire so as to heat the shape memory wire and make said wire contract to open said lock.
Specification