Automatic faucet

• US 5,025,516 A
• Filed: 10/30/1989
• Issued: 06/25/1991
• Est. Priority Date: 03/28/1988
• Status: Expired due to Term

• Current Assignee: Sloan Valve Company
• Original Assignee: Sloan Valve Company
• Inventors: Wilson, John R.
• Primary Examiner(s): Cusick, Ernest G.
• Assistant Examiner(s): JACYNA, J CASIMER
• Application Number:
  US07/428,905
• Time in Patent Office: 603 Days
• Field of Search: 4/623, 4/DIG. 3, 4/304, 4/302, 4/305, 250/221, 251/129.01-129.06
• US Class Current: 4/623
• CPC Class Codes: E03C 1/057 touchless, i.e. using sensors

Abstract

A faucet for automatic operation defining a base and an elongated cantilvered spout body provided with a discharge outlet. A sensing means for automatic operation in the form of an emitter and detector are mounted on the spout body intermediate the base and discharge outlet. The emitter and detector are positioned on the longitudinal center of the spout body and provide a concentrated zone of effective detection disposed intermediate the area of discharge from the faucet and the base. The zone shape is transversely elongated relative to the longitudinal center of the faucet spout body.

Claims

1. A faucet for automatic operation defining a base and an elongated spout body extending therefrom including a discharge outlet spaced from the base,

sensing means operative to automatically operate said faucet by detecting the presence of a user comprising a signal emitter and a signal detector disposed intermediate said base and said outlet, said emitter and detector each being disposed on the longitudinal centerline of the spout body, said detector having a field of view symmetrical about an axis, said axis being parallel to a centerline of said discharge outlet,

and said sensing means being able to communicate with a faucet control means adapted to automatically operate said faucet.

2. A faucet as claimed in claim 1 wherein said detector is disposed nearest the discharge outlet of said spout body.

3. A faucet as claimed in claim 1 wherein the spout body defines a generally planar surface, said emitter and detector and said discharge outlet each face outwardly therefrom and wherein said planar surface is disposed at about an angle of 20°

relative to horizontal.

4. A faucet as claimed in claim 3 wherein said emitter has an output symmetrical about an axis and wherein the axis of the output is at an angle of about 25°

relative to the axis of the field of view of the detector.

5. A faucet as claimed in claim 3 wherein the intersection of the cone of emission and the cone of field of view of the detector forms a zone of effective detection which commences about an inch from the spout body planar surface.

6. A faucet as claimed in claim 5 wherein the zone of effective detection extends about six inches from the faucet body planar surface.

7. A faucet as claimed in claim 5 wherein the angle between the axes of said cone of emission of said emitter and field of view of said detector are at about a 25°

angle relative to each other.

8. A faucet as claimed in claim 7 wherein the axis of the conical field of view of the detector is parallel to the centerline of the discharge outlet.

9. A faucet as claimed in claim 5 wherein the discharge outlet is adjacent a free end of the body spout and the zone of effective detection is disposed behind the discharge outlet relative to said free end, whereby the water stream flowing from said discharge outlet is disposed between the user and the effective zone of detection.

10. A faucet as claimed in claim 9 wherein the zone of effective detection is wider in a direction transverse to the longitudinal center of the body spout.

11. A faucet as claimed in claim 1 wherein said emitter has an output defined by a generally conical cone of emission wherein the axis of the cone of emission of said emitter and the axis of the field of view of said detector are at a convergent angle relative to each other.

12. A faucet as claimed in claim 11 wherein the angle between the axes of said cone of emission of said emitter and field of view of said detector are at about a 25°

angle relative to each other.

13. A faucet as claimed in claim 11 wherein said emitter has an output and the detector has a field of view, wherein the axis of the output is at an angle of about 25°

relative to the axis of the field of view of the detector.

14. A faucet as claimed in claim 13 wherein said planar surface is disposed at about an angle of 20°

relative to horizontal.

15. A faucet as claimed in claim 11 wherein the intersection of the cone of emission and cone of field of view forms a zone of effective detection.

16. A faucet as claimed in claim 15 wherein the discharge outlet is adjacent a free end of the body spout and the zone of effective detection is disposed behind the discharge outlet relative to said free end, whereby a water stream flowing from said discharge outlet is disposed between the user and the effective zone of detection.

17. A faucet as claimed in claim 15 wherein the zone of effective detection is wider in a direction transverse to the longitudinal center of the body spout.

18. A faucet as claimed in claim 1 wherein the emitter is a light emitter diode and the detector is a phototransistor.

19. A faucet as claimed in claim 18 wherein the spout body defines a generally planar surface, said emitter and detector and said discharge outlet each face outwardly therefrom.

20. A faucet as claimed in claim 18 wherein said emitter has an output defined by a generally conical cone of emission and said detector has a field of view that is generally conical and wherein the axis of the cone of emission of said emitter and the axis of the field of view of said detector are at a convergent angle relative to each other.

21. A faucet as claimed in claim 20 wherein the intersection of the cone of emission and cone of field of view forms a zone of effective detection.

22. A faucet as claimed in claim 21 wherein the discharge outlet is adjacent a free end of the body spout and the zone of effective detection is disposed behind the discharge outlet relative to said free end, whereby the water stream flowing from said discharge outlet is disposed between the user and the effective zone of detection.

23. A faucet as claimed in claim 21 wherein the zone of effective detection is wider in a direction transverse to the longitudinal center of the body spout.

24. A faucet as claimed in claim 18 wherein said emitter has an output symmetrical about an axis, wherein the axis of the output is at an angle of about 25°

relative to the axis of the field of view of the detector.

25. A faucet as claimed in claim 1 wherein said signal emitter and said signal detector are disposed on said spout body intermediate said base and said outlet.

26. A faucet for automatic operation comprising:

a body defining a base and an elongated spout including a discharge outlet spaced from the base;

control means to control the discharge from said discharge outlet;

sensing means to operate said control means in response to sensing of conditions existent in a sensing zone comprising a signal emitter to emit signals in an output zone and a signal detector to sense signals in a field of view, said emitter and detector being positioned such that the output of emission overlies the field view of the detector to form a concentrated primary zone of detection which is elongate in the direction of discharge from said discharge outlet and extends for a distance of about one inch to about six inches from said outlet wherein said field of view of said detector is symmetrical about an axis, said axis being parallel to a centerline of said discharge outlet.

27. A faucet as claimed in claim 26 wherein said signal emitter and said signal detector are disposed on said elongated spout intermediate said base and said discharge outlet.