§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US4387290A Expired / Lapsed US ⏱️ 0.0 years remaining

Anti-freezing system for a windshield-wiper

Assignee: Nissan Motor Co Ltd
•
Filing: 1980-11-21
•
Granted: 1983-06-07
•
Expires: 2000-11-21
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract An anti-freezing system for a windshield-wiper of a vehicle including a cut off device, which may be a relay, responsive to a temperature sensor which senses the ambient temperature. The cut off device energizes a heater to heat the windshield-wiper when and only when the ambient temperature as sensed by the temperature sensor is below a predetermined value. The system may include a control device, which may be a relay, responsive to the output of an electric generator provided in the automotive vehicle and adapted to disable the heater unless the electric generator is delivering power. The system may further include a manual override switch whereby the heater may be supplied with power, irrespective of the state of the cut off device. The heater may be provided extending along an elongated wiper support, or may be embedded in a wiper blade supported by the wiper support. The temperature sensor is preferably provided on the windshield-wiper in a position where the temperature sensor is free from the influence of the heater.

Inventors

  • 👤 Akira Yasuda

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 18:04
CPC Classifications
B; B60; B60S; B60S1/00; B60S1/02; B60S1/04; B60S1/32; B60S1/38; B60S1/3803; B60S1/3805; B60S2001/3812; B60S2001/3813; B60S2001/3827; B60S2001/3836

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 145 words
An anti-freezing system for a windshield-wiper of an engined vehicle, comprising: (a) a heater adapted to heat said windshield-wiper; (b) a first relay switch for supplying heating electric power to said heater when energized with a current value greater than a predetermined value; (c) an electric generator driven by the engine to produce electric power; (d) a second relay switch connected to said electric generator for supplying electric power when energized; and (e) a temperature sensitive means including a resistance changing with the ambient temperature for sensing the ambient temperature, said temperature sensitive means being connected between said second relay switch and said first relay switch so as to supply a current greater than the predetermined value from said second relay switch to said first relay switch for energization when the ambient temperature as sensed by said temperature sensitive means is below a predetermined value.
Claim 2
Dependent Claim 145 words
An anti-freezing system for a windshield-wiper of an engined vehicle, comprising: (a) a heater adapted to heat said windshield-wiper; (b) a first relay switch for supplying heating electric power to said heater when energized with a current value greater than a predetermined value; (c) an electric generator driven by the engine to produce electric power; (d) a second relay switch connected to said electric generator for supplying electric power when energized; and (e) a temperature sensitive means including a resistance changing with the ambient temperature for sensing the ambient temperature, said temperature sensitive means being connected between said second relay switch and said first relay switch so as to supply a current greater than the predetermined value from said second relay switch to said first relay switch for energization when the ambient temperature as sensed by said temperature sensitive means is below a predetermined value.
Claim 3
Dependent Claim 30 words
The system as claimed in claim 1, further comprising a manual override switch whereby said heater may be supplied with power irrespective of the state of said temperature sensitive means.
Claim 4
Dependent Claim 20 words
The system as claimed in claim 1, wherein said temperature sensitive means is disposed in the vicinity of the windshield-wiper.
Claim 5
Dependent Claim 31 words
The system as claimed in claim 1, wherein said windshield-wiper includes an elongated support and a wiper blade supported by said support, and said heater is disposed extending along said support.
Claim 6
Dependent Claim 36 words
The system as claimed in claim 1, wherein said windshield-wiper includes an elongated support and a wiper blade supported by said support, and said heater is embedded in said wiper blade and extends along said blade.
Claim 7
Dependent Claim 36 words
The system as claimed in claim 4 or claim 5, wherein said temperature sensitive means is provided on said support in a position where said temperature sensitive means is free from the influence of said heater.

References Cited (Backward Citations)

US1937286A Cited
DE1268506B Cited
US3934111A Cited
US4152808A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-06-06 1986-12-06 1987-06-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-06-06 1990-12-06 1991-06-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-06-06 1994-12-06 1995-06-07 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag