Window wiper and scraper blade

Claim 2

A wiper blade for cleaning curved or straight window surfaces comprising: an elongated resilient member having a wiping edge extending lengthwise, thereof; a relatively hard elongated member adjacent said resilient member and having a wiping edge extending lengthwise thereof, said relatively hard member being substantially uniformly reversely flexible throughout its lengthwise wiping edge in a plane generally perpendicular to said window surface to be wiped so as to conform to the contour of said window surface, and relatively inflexible in a plane generally parallel to said window surface thereof, said relatively hard member comprises a plurality of flat plastic elements arranged in an end-to-end fashion; a holder having a plurality of longitudinally extending channels, said hard member and said resilient member being disposed in separate channels of said holder in a side-by-side fashion; and means for maintaining said members in said separate channels.

Claim 3

The wiper blade defined in claim 1, including a second elongated resilient member having a wiping edge extending longitudinally thereof, said second member being disposed in a channel adjacent said hard member on the side thereof opposite said first mentioned resilient member.

Claim 4

A wiper blade for cleaning curved or straight window surfaces comprising: an elongated resilient member having a wiping edge extending lengthwise thereof; a relatively hard elongated member adjacent said resilient member and having a wiping edge extending lengthwise thereof, said relatively hard member being substantially uniformly reversely flexible throughout its lengthwise wiping edge in a plane generally perpendicular to said window surface to be wiped so as to conform to the contour of said window surface, and relatively inflexible in a plane generAlly parallel to said window surface thereof; means for maintaining said members adjacent one another; said relatively hard member comprising a flat strip of plastic material, the outer edge of which forms said wiping edge, said plastic strip having a plurality of longitudinally spaced teeth extending from the edge of said strip opposite said wiping edge; and means permitting the outer ends of said teeth to tilt towards one another as said wiping edge of said plastic strip flexes to conform to the contour of said window surface.

Claim 5

A wiper blade for cleaning curved or straight window surfaces comprising: an elongated resilient member having a wiping edge extending lengthwise thereof; a relatively hard elongated member adjacent said resilient member and having a wiping edge extending lengthwise thereof, said relatively hard member being substantially uniformly reversely flexible throughout its lengthwise wiping edge in a plane generally perpendicular to said window surface to be wiped so as to conform to the contour of said window surface, and relatively inflexible in a plane generAlly parallel to said window surface thereof; means for maintaining said members adjacent one another; said relatively hard member comprising a flat strip of plastic material, the outer edge of which forms said wiping edge, said plastic strip having a plurality of longitudinally spaced teeth extending from the edge of said strip opposite said wiping edge; and means permitting the outer ends of said teeth to tilt towards one another as said wiping edge of said plastic strip flexes to conform to the contour of said window surface.

Claim 6

The wiper blade defined in claim 3 including a second elongated resilient member having a wiping edge extending longitudinally thereof, said second resilient member being adjacent said hard member on side thereof opposite said first member.

Claim 7

A wiper blade for cleaning curved or straight window surfaces comprising: an elongated resilient member having a wiping edge extending lengthwise thereof; a relatively hard elongated member adjacent said resilient member and having a wiping edge extending lengthwise thereof, said relatively hard member being substantially uniformly reversely flexible throughout its lengthwise wiping edge in a plane generally perpendicular to said window surface to be wiped so as to conform to the contour of said window surface, and relatively inflexible in a plane generally parallel to said window surface thereof; means for maintaining said members adjacent one another; means mounting said wiper blade for movement back and forth across said window surface; means biasing said wiping edges of said wiper blade against said window surface with a force of a predetermined amount; a second elongated resilient member having a wiping edge extending longitudinally thereof, said second resilient member being adjacent said hard member on the side thereof opposite said first-mentioned resilient member; and said relatively hard member comprising a strip of plastic material the outer edge of which forms said wiping edge, said strip having a plurality of longitudinally spaced teeth extending from said edge opposite said wiping edge, and means permitting the outer ends of said teeth to be tilted toward one another as said wiper blade moves back and forth thereacross.

Claim 8

A wiper blade for cleaning curved or straight window surfaces comprising: an elongated resilient member having a wiping edge extending lengthwise thereof; a relatively hard elongated member adjacent said resilient member and having a wiping edge extending lengthwise thereof, said relatively hard member being substantially uniformly reversely flexible throughout its lengthwise wiping edge in a plane generally perpendicular to said window surface to be wiped so as to conform to the contour of said window surface, and relatively inflexible in a plane generally parallel to said window surface thereof; means for maintaining said members adjacent one another; means mounting said wiper blade for movement back and forth across said window surface; means biasing said wiping edges of said wiper blade against said window surface with a force of a predetermined amount; a second elongated resilient member having a wiping edge extending longitudinally thereof, said second resilient member being adjacent said hard member on the side thereof opposite said first-mentioned resilient member; and said relatively hard member comprising a strip of plastic material the outer edge of which forms said wiping edge, said strip having a plurality of longitudinally spaced teeth extending from said edge opposite said wiping edge, and means permitting the outer ends of said teeth to be tilted toward one another as said wiper blade moves back and forth thereacross.

Claim 9

A wiper blade for cleaning curved or straight window surfaces comprising: an elongated resilient member having a wiping edge extending lengthwise thereof; a relatively hard elongated member adjacent said resilient member and having a wiping edge extending lengthwise thereof, said relatively hard member being substantially uniformly reversely flexible throughout its lengthwise wiping edge in a plane generally perpendicular to said window surface to be wiped so as to conform to the contour of said window surface, and relatively inflexible in a plane generally parallel to said window surface thereof; means for maintaining said members adjacent one another; means mounting said blade proximate the lower portion of the window to be wiped; means moving said window and said blade relative to one another to permit said blade to clean said window; said relatively hard member comprising a continuous flat strip of said hard material, the outer edge of which forms said wiping edge, said strip having a plurality of longitudinally spaced teeth extending from the edge of said strip opposite said wiping edge, and means permitting the outer ends of said teeth to tilt toward one another as said wiping edge flexes to conform to the contour of said window surface as said wiping edge and said window move relatively to one another.

Claim 10

A wiper blade for cleaning curved or straight window surfaces comprising: an elongated resilient member having a wiping edge extending lengthwise thereof; a relatively hard elongated member adjacent said resilient member and having a wiping edge extending lengthwise thereof, said relatively hard member being substantially uniformly reversely flexible throughout its lengthwise wiping edge in a plane generally perpendicular to said window surface to be wiped so as to conform to the contour of said window surface, and relatively inflexible in a plane generally parallel to said window surface thereof; means for maintaining said members adjacent one another; means mounting said blade proximate the lower portion of the window to be wiped; means moving said window and said blade relative to one another to permit said blade to clean said window; said relatively hard member comprising a continuous flat strip of said hard material, the outer edge of which forms said wiping edge, said strip having a plurality of longitudinally spaced teeth extending from the edge of said strip opposite said wiping edge, and means permitting the outer ends of said teeth to tilt toward one another as said wiping edge flexes to conform to the contour of said window surface as said wiping edge and said window move relatively to one another.

Claim 11

The wiper blade defined in claim 6, wherein said relatively hard member is made of plastic material.

Claim 12

The wiper blade defined in claim 6, wherein said wiping edge of said hard member is spring biased toward engagement with said window surface.

Claim 13

The wiper blade as defined in claim 1 including means for selectively raising and lowering said hard member within said holder for selectively causing engagement and disengagement of the wiping edge of said hard member with the surface of said window.

Claim 16

The device as defined in claim 10 including a second channel shaped member carrying said relatively hard elongated member and disposed in said first-mentioned hard member carrying channel; said second channel member having a plurality of longitudinally spaced pairs of axially extending pins adapted to engage a plurality of upwardly extending slots formed in the walls of said first-mentioned channel whereby movement of said channel pins in said wall slots causes said hard member to be raised and lowered with respect to said window surface.

Claim 17

The device defined in claim 11 including a bore extending longitudinally through said elongated resilient member and a bore extending longitudinally through said elongated hard member; a cable disposed in each of said bores; each of said channels having opposite end walls; said end walls having means disposed on the outer portion thereof engaging said cables and biasing said cables outwardly.

Claim 18

The device defined in claim 12, wherein said biasing means comprising a coil spring disposed between an enlarged portion formed at the opposite ends of each cable and the outer wall of each of said end walls.

Claim 19

A wiper blade for cleaning curved or straight window surface comprising: a resilient member having a wiping edge extending lengthwise thereof; a relatively hard member adjacent said resilient member and comprising a flat strip of plastic material, the lower edge of which forms a wiping edge extending lengthwise thereof, said strip having a plurality of longitudinally spaced teeth opposite said wiping edge, said relatively hard member being substantially uniformly reversely flexible throughout its lengthwise wiping edge in a plane generally perpendicular to said window surface so as to conform to the contour of said window surface and relatively inflexible in a plane generally parallel to said window surface; a holder having a plurality of longitudinally extending channels, said hard member being disposed in one of said holder channels, said resilient member being disposed in another of said holder channels; a bore extending longitudinally through each of said teeth of said hard member, each of said bores being in axial alignment; a cable extending through each of said aligned bores, the ends of said cable being carried by said holder; and means engaging the ends of said cable to maintain said cable in tension.

Claim 20

A wiper blade for cleaning curved or straight window surface comprising: a resilient member having a wiping edge extending lengthwise thereof; a relatively hard member adjacent said resilient member and comprising a flat strip of plastic material, the lower edge of which forms a wiping edge extending lengthwise thereof, said strip having a plurality of longitudinally spaced teeth opposite said wiping edge, said relatively hard member being substantially uniformly reversely flexible throughout its lengthwise wiping edge in a plane generally perpendicular to said window surface so as to conform to the contour of said window surface and relatively inflexible in a plane generally parallel to said window surface; a holder having a plurality of longitudinally extending channels, said hard member being disposed in one of said holder channels, said resilient member being disposed in another of said holder channels; a bore extending longitudinally through each of said teeth of said hard member, each of said bores being in axial alignment; a cable extending through each of said aligned bores, the ends of said cable being carried by said holder; and means engaging the ends of said cable to maintain said cable in tension.

Claim 21

The wiper blade defined in claim 14 wherein said holder channels have opposite end walls, said end walls having means disposed on the outer portion thereof engaging said cable to bias same in tension, said biasing means comprising coil springs disposed between an enlarged portion formed on the outer ends of said cables and the outer walls of each of said channel end walls.

Claim 22

The wiper blade defined in claim 14 furtHer comprising a second bore extending longitudinally through said resilient member; a second cable extending through said second bore, the ends of said second cable being carried by said holder; and means engaging the ends of said second cable to maintain said second cable in tension.

Claim 23

The wiper blade defined in claim 16 wherein said holder channels have opposite end walls, said end walls having means disposed on the outer portion thereof engaging each of said cables to bias same in tension, said biasing means comprising coil springs disposed between an enlarged portion formed on the outer ends of each of said cables and the outer walls of each of said channel end walls.