Windshield wiper blade assembly

• US 3,192,551 A
• Filed: 08/31/1964
• Issued: 07/06/1965
• Est. Priority Date: 08/31/1964
• Status: Expired due to Term

• Current Assignee: Walter D. Appel
• Original Assignee: Walter D. Appel
• Inventors: Appel, Walter D.
• Application Number:
  US04/394,386
• Time in Patent Office: 309 Days
• US Class Current: 15/250.43
• CPC Class Codes: B60S 1/38 Wiper blades provided with liquid spreading means B60S1/524; provided with gas spreading means B60S1/546
• CPC Class Codes: B60S 1/3851 Mounting of connector to blade assembly
• CPC Class Codes: B60S 1/3879 placed in side grooves in the squeegee
• CPC Class Codes: B60S 2001/382 the backing strip being an essentially planar reinforcing strip, e.g. vertebra

Claims

1. A WINDSHIELD WIPER BLADE ASSEMBLY INCLUDING A WIPER ELEMENT, A FLEXIBLE SPRING BACKBONE ELEMENT CONNECTED TO THE WIPER ELEMENT, ATTACHING MEANS ADJACENT THE CENTER OF SAID BACKBONE ELEMENT, SAID BACKBONE ELEMENT HAVING COORDINATED LENGTH, SECTION WIDTH, THICKNESS, MODULUS OF ELASTICITY AND FREE FORM LONGITUDINAL CURVATURE EXCEEDING ANY SUBTENDED WINDSHIELD CUIRVATURE AND INCLUDING PROGRESSIVE DIMENSIONAL VARIATIONS PROVIDING A PARABOLIC EFFECT IN SPRING RATE NORMAL TO THE WINDSHIELD SURFACE ADAPTED IN ENGAGEMENT IN A NORMAL DIRECTION AGAINST A PREDETERMINED WINDSHIELD SURFACE TO MAKE PROGRESSIVE "WRAPPING" PRESSURE CONTACT FROM ENDS TO CENTER AS A PREDETERMINED NORMAL PRESSURE LOADING IS GRADUALLY APPLIED THROUGH SAID ATTACHING MEANS.