Structure of double-blade wind shieldwiper with arm to blade connectors

• US 5,383,248 A
• Filed: 02/24/1993
• Issued: 01/24/1995
• Est. Priority Date: 03/29/1991
• Status: Expired due to Fees

• Current Assignee: Chang S.Y. Ho
• Original Assignee: Chang S.Y. Ho
• Inventors: Ho, Chang S. Y.
• Primary Examiner(s): Scherbel David A.
• Assistant Examiner(s): Graham, Gary K.
• Application Number:
  US08/022,385
• Time in Patent Office: 699 Days
• Field of Search: 15/250.42, 15/250.32, 15/250.35, 15/250.41, 15/250.31, 15/250.36, 15/250.40
• US Class Current: 15/250.32
• CPC Class Codes: B60S 1/3801 characterised by a blade support harness consisting of several articulated elements B60S1/3803, B60S1/3806 take precedence
• CPC Class Codes: B60S 1/3806 Means, or measures taken, for influencing the aerodynamic quality of the wiper blades
• CPC Class Codes: B60S 1/40 Connections between blades and arms
• CPC Class Codes: B60S 1/4016 the element being provided with retention means co-operating with the hook-shaped end of the arm
• CPC Class Codes: B60S 1/4077 characterised by the connecting part of, or an intermediate element mounted on, the wiper blade means for locking the side pin B60S1/4074
• CPC Class Codes: B60S 1/4087 the end being provided with protrusions or holes
• CPC Class Codes: B60S 2001/3815 chacterised by the joint between elements
• CPC Class Codes: B60S 2001/3818 the backing strip being a channel-like element, e.g. not continuous
• CPC Class Codes: B60S 2001/3837 with more than one wiping edge or lip
• CPC Class Codes: B60S 2001/4093 characterised by the mounting of the pivot on the main yoke of the blade

Abstract

A double-blade wind shield wiper, the blade assembly of which comprising a frame assembly for holding two parallel wiper blades. The frame assembly includes a main frame at the middle, two end frames at two opposite ends and two intermediate frames set therebetween which are respectively connected into shape by conning pins and spring plates. The frame assembly has vent holes and bevel strips for guiding air stream to force wiper blades to firmly attach to wind shield glass. An adapter is fastened in frame assembly to match with a connector for connecting the blade assembly to a wiper drive arm.

Claims

1. A double-bladed windshield wiper comprising an elongated blade assembly having an adapter connected thereto, an elongated wiper drive arm, and a connector connecting said adapter to said wiper drive arm, wherein:

said blade assembly comprises an elongated central main frame, two elongated intermediate frames respectively connected to said main frame at opposite ends thereof, each of said intermediate frames having a first end extending outwardly from said main frame and a second end disposed adjacent said main frame, an elongated end frame respectively connected to each of said intermediate frames, each of said end frames having a first end extending outwardly from the first end of each of said intermediate frames and a second end disposed adjacent each of said intermediate frames, said main frame having a pair of aligned apertures disposed at each end thereof, each of said intermediate frames having two pairs of aligned apertures, one pair being disposed at the first end thereof and each of said end frames having a pair of aligned apertures, the apertures in said end frames being in registry with the apertures at the first end of its respective intermediate frame, and the other pair of apertures in each of said intermediate frames being in registry with the apertures at its respective adjacent end of said main frame, a connecting pin extending through each of said pairs of aligned and registered apertures to interconnect said frames, and a spring plate coupled to said frames such as to retain each of said connecting pins in its respective apertures, two elongated clamping plates, mounted in parallel on said assembly, connecting said intermediate and end frames, said clamping plates depending from said frames and each defining a longitudinal groove, and a wiper blade disposed in each said clamping plate groove;

said main frame being generally U-shaped in transverse cross section having spaced sidewalls and a web interconnecting said sidewalls, said frame having a plurality of elongated vent holes disposed longitudinally therealong in said web, a bevel strip extending obliquely from said main frame to a region below each vent hole, each of said intermediate frames having a main frame connecting portion located midway between the ends thereof, and a unitary hook member at the rear end thereof with two parallel grooves formed therein, each of said end frames having an intermediate frame connecting portion located midway between the ends thereof, unitary hook members disposed at each end of said end frames with each hook member having two parallel grooves respectively formed therein, and a stop plate vertically extending downward from said first end of each end frame;

said adapter comprising a rectangular casing formed by a pair of vertical parallel sidewalls coupled with a pair of vertical, parallel end walls, the sidewalls being perpendicular to the end walls, and all of said walls together defining a top and bottom edge of said casing, a projecting strip extending laterally from each end wall at the top edge and unitary hooks extending from each sidewall at the bottom edge, said hooks coupling the casing with the central main frame, a first and second cross bar extending between and connected with the sidewalls, said first cross bar having an elongated longitudinal opening, said second cross bar having a bore through the central axis thereof and a portion of said second cross bar forming a spring plate with a raised portion adjacent the bore;

said connector comprising a hollow housing and a resilient, elongated, U-shaped square tube member coupled together, said housing having an arcuate front end and an open rear end, said arcuate front end having a pivot pin extending outwardly from a side thereof to a free end, said pivot pin having an annular groove adjacent the free end thereof;

said adapter having an aperture therein in registration with the bore in said second cross bar so that when said pivot pin is received through said aperture extending into the bore in said second crossbar, said pin is retained by engagement of the annular groove with the spring plate, the open rear end of said housing mounting a spring plate therein with a hook on the distal portion thereof for engaging said U-shaped tube when one end of said tube member is received in said housing through the open rear end; and

said wiper drive arm is coupled to the end of said U-shaped tube member opposite the end received in the open end of said housing which is retained therein by said hook.

2. The double-bladed windshield wiper of claim 1 wherein said main frame ends are respectively connected to said main frame connecting portion of said intermediate frames and the first end of each intermediate frame is connected to the connecting portion of the corresponding end frame so that said wiper blade assembly is slightly curved whereby the two opposite ends of each elongated clamping plate are inserted in the grooves of said intermediate frames and said end frames to hold said two wiper blades.

3. The double-bladed windshield wiper of claim 1, wherein said wiper drive arm has a flat connecting end received in a leg of the U-shaped tube member.

4. The double-bladed windshield wiper of claim 3 further comprising screw fastener means for fastening wiper drive arm with said U-shaped tube member.