Cutting assembly for removing a windshield and method relating to same
AssigneeCrystal Glass Canada Ltd.
InventorAlfred Ogston
Life of this patent
Estimating the term…
Abstract
The cutting assembly functions to sever the urethane bed bonding a windshield to a vehicle. The assembly comprises a reciprocating air gun connected with a cutting blade by a shaft. The blade has a straight front cutting edge about 4 inches in width. The blade is reciprocated in and out of the bed to sever it.
Claims15
A cutting tool for separating a glass windshield from a vehicle urethane bed, the cutting tool to be used with a reciprocating device, the cutting tool comprising:
- a shaft having inner and outer ends and being connected at its inner end with the reciprocating device for reciprocation thereby, wherein the shaft is rigid and elongated;
- a blade wherein the blade is flat and thin and has a substantially constant thickness, said blade having front and rear ends, the blade rear end being connected to the shaft's outer end, the blade being substantially coplanar with the shaft, the blade having a substantially straight front edge which is beveled on one side only to provide a non-sharpened top edge and a sharpened bottom cutting edge, the blade narrowing from its front end to its rear end to about the width of the shaft wherein said front end is wider than the width of the shaft, the blade being sufficiently rigid to cut the urethane bed when reciprocated by the reciprocating device, but having sufficient lateral flexibility to conform to a curved surface of the windshield when pressed thereagainst, the blade being configured so that the non-sharpened top edge of the blade can be pressed against the glass of the windshield while the sharpened bottom cutting edge penetrates the urethane bed;
- wherein the blade can be driven through the urethane bed by triggering the reciprocating device to reciprocate the blade longitudinally into and out of the urethane bed.
A cutting tool, to be used with a reciprocating air gun, for separating a glass windshield from a vehicle urethane bed, comprising:
- a shaft having inner and outer ends, said shaft being connectable at its inner end to the air gun for reciprocation thereby;
- and
- a flat blade mountable to the outer end of the shaft, said blade having a sharp transverse front cutting edge having a width of at least about 2 inches and sufficient lateral flexibility to substantially conform with the curvature of the windshield when pressed thereagainst in use.
A windshield removal assembly for cutting a urethane bed securing a glass windshield having a curved surface to a vehicle at an edge of a windshield opening formed by the vehicle, there being a narrowing apex space between the windshield and a vehicle part forming the opening, comprising:
- a reciprocating air gun;
- a rigid, elongated shaft having inner and outer ends and being connected at its inner end with the gun for reciprocation thereby;
- and
- a flat thin steel blade of substantially constant thickness, said blade having front and rear ends, the blade rear end being connected to the shaft's outer end, the blade being substantially coplanar with the shaft, the blade having a substantially straight front edge which is beveled on one side only to provide a non-sharpened top edge and a sharpened bottom cutting edge, the blade narrowing from its front end to its rear end to about the width of the shaft, the blade being sufficiently rigid to cut the urethane bed when reciprocated by the air gun but having sufficient lateral flexibility to conform to the curved surface of the windshield when pressed there against;
- the shaft being operative to space the blade from the gun sufficiently to allow the assembly to be used within the confines of the apex space;
- the air gun being operative to reciprocate the shaft and blade with sufficient force to advance the blade through the urethane bed;
- the blade being configured so that the non-sharpened top edge of the blade can be pressed against the glass of the windshield while the sharpened bottom cutting edge penetrates the urethane bed.
Dependencies are inferred from the claim text.