Passive wiper assembly
The passive lens wiper is an apparatus for assuring that accumulated moisture is removed from a surface through directing a flow of air across a surface, such as a camera housing lens, installed on the exterior of an emergency response or mass transit vehicle. The apparatus concentrates and directs airflow generated by the motion of the vehicle across the camera housing lens to clear water from the lens while the vehicle is in motion. The passive lens wiper has no moving parts, is easily installed, and is cost effective to manufacture. The passive lens wiper may also be used in conjunction with a chemical surface treatment that decreases the surface tension of water for a quicker clearing process.
1 . A passive lens wiper apparatus comprising:
A flattened, rectangular tube with four walls, a top, a bottom and two sides, with each terminal end open to provide a pathway for airflow through the flattened, rectangular tube;
Said terminal ends oriented, when the apparatus is installed, such that the first terminal end serves as an intake for air to flow into, and the second terminal end serves as an outflow for air passing through said flattened, rectangular tube;
Said intake terminal end having a width twice that of the outflow terminal end,
And the body of the wiper apparatus having at least one 90 degree bend between the intake terminal end and the outflow terminal end.
2 . A passive lens wiper apparatus according to claim 1 , further comprising:
Said intake terminal end tapering from a width twice that of the outflow terminal to a width equivalent to the outflow terminal prior to a 90 degree bend.
3 . A passive lens wiper apparatus according to claim 1 , further comprising:
Said 90 degree bend in the body of the flattened, rectangular tube positioned not less than eighty percent of the distance between the intake terminal end and the outflow terminal end.
4 . A passive lens wiper apparatus according to claim 1 , further comprising:
Said flattened, rectangular tube configured to be affixed to a camera housing through any of a variety of construction means including screws, adhesives, welding, or other such construction methods useful for joining together outdoor, ruggedized equipment articles.
5 . A passive lens wiper apparatus comprising:
A flattened, rectangular tube with four walls, a top, a bottom and two sides, with each terminal end open to provide a pathway for airflow through the flattened, rectangular tube;
Said terminal ends oriented, when the apparatus is installed, such that the first terminal end serves as an intake for air to flow into, and the second terminal end serves as an outflow for air passing through said flattened, rectangular tube;
Said intake terminal end having a width twice that of the outflow terminal end,
And the body of the wiper apparatus having at least two 90 degree bends between the intake terminal end and the outflow terminal end.
6 . A passive lens wiper apparatus according to claim 5 , further comprising:
Said intake terminal end tapering from a width twice that of the outflow terminal to a width equivalent to the outflow terminal prior to a second 90 degree bend.
7 . A passive lens wiper apparatus according to claim 5 , further comprising:
Said 90 degree bends in the body of the flattened, rectangular tube positioned such that the first 90 degree bend conforms to a first corner of a camera housing, and the second 90 degree bend conforms to a next consecutive corner of a camera housing, wherein the outflow terminal end directs airflow across the surface of a camera housing when said flattened, rectangular tube with at least two 90 degree bends is attached to a camera housing.
8 . A passive lens wiper apparatus according to claim 5 , further comprising:
Said flattened, rectangular tube configured to be affixed to a camera housing through any of a variety of construction means including screws, adhesives, welding, or other such construction methods useful for joining together outdoor, ruggedized equipment articles.
9 . A passive lens wiper apparatus comprising:
A flattened, rectangular tube with four walls, a top, a bottom and two sides, with each terminal end open to provide a pathway for airflow through the flattened, rectangular tube;
Said terminal ends oriented, when the apparatus is installed, such that the first terminal end serves as an intake for air to flow into, and the second terminal end serves as an outflow for air passing through said flattened, rectangular tube;
Said intake terminal end having a width twice that of the outflow terminal end,
And the body of the wiper apparatus having at least three 90 degree bends between the intake terminal end and the outflow terminal end.
10 . A passive lens wiper apparatus according to claim 9 , further comprising:
Said intake terminal end tapering from a width twice that of the outflow terminal to a width equivalent to the outflow terminal prior to a second 90 degree bend.
11 . A passive lens wiper apparatus according to claim 9 , further comprising:
Said 90 degree bends in the body of the flattened, rectangular tube positioned such that the first 90 degree bend conforms to a first corner of a camera housing, and the second 90 degree bend conforms to a next consecutive corner of a camera housing, and the third 90 degree bend conforms to a next consecutive corner of a camera housing, wherein the outflow terminal end directs airflow across the surface of a camera housing when said flattened, rectangular tube with at least three 90 degree bends is attached to a camera housing.
12 . A passive lens wiper apparatus according to claim 9 , further comprising:
Said flattened, rectangular tube configured to be affixed to a camera housing through any of a variety of construction means including screws, adhesives, welding, or other such construction methods useful for joining together outdoor, ruggedized equipment articles.