A SEALING WEATHERSTRIP FOR FLUSH WINDOWS OR DOORS OF AGRICULTURAL TRACTOR CABS

Abstract: A sealing weatherstrip for flush windows or doors of agricultural tractor cabs comprises a profiled section of elastomeric material (1) having a front fixing part (2) and a rear tubular sealing part (3). The front fixing part (2) has a flat outer surface (4) along which a double-sided adhesive strip (9) is applied for sticking the weatherstrip (1) to the inner marginal surface of the window or door (V) of the tractor.

Description: The present invention relates to a sealing weatherstrip for windows or doors of agricultural tractors, of the type comprising a profiled section of elastomeric material having a front fixing part and a rear tubular sealing part, wherein the front fixing part of the sealing weatherstrip has a flat outer surface along which a double-sided adhesive strip is applied for sticking the weatherstrip to the inner marginal surface of the window or door of the tractor. A sealing weatherstrip of the above-mentioned type is known from GB-A-2 036 840, wherein the flat outer surface is comprised of a first and a second base placed on two mutually perpendicular planes, and is therefore in the form of a generally wedge or V-shaped surface. The double-sided adhesive strip is applied to both or only one of the two bases. In either case, this prior art weatherstrip is only adapted to be fitted within a corresponding V-shaped, or angled flange of a motor vehicle body door or door opening, and not on a planar marginal edge thereof. The or each double-sided adhesive strip, even if mounted on the or respective base partially in a recess therein, is not safely protected in use against ambient agents (water, moisture and dust) negatively affecting the adhesive cohesion of the two adhesive sides of the double adhesive strip. Moreover, proper application of this known weatherstrip onto the receiving vehicle body flange is troublesome. Sealing weatherstrip with double-sided adhesive fixing strip are also known from US-A-4084348 and US-A-4112623, with same drawbacks in connection with safe protection of the adhesive strip and correct positioning during application. The object of the present invention is to overcome the above problems, providing a sealing weatherstrip of the type defined above which has a shape which enables it to be mounted quickly and easily, as well as ensuring extremely effective sealing in its applied condition. According to the invention, this object it achieved by virtue of the features set forth in the characterising part of Claim 1. It is advantageous for the rear tubular sealing part of the weatherstrip to have an outer rib which projects laterally on the same side as the lateral tubular sealing appendage of the front fixing part of the weatherstrip. The invention will now be described in detail with reference to the appended drawings, provided purely by way of non-limiting example, in which: Figure 1 is a perspective view of a length of a sealing weatherstrip for tractors, according to the invention, and Figure 2 is a cross-section of the weatherstrip in its position of use. With reference to the drawings, a sealing weatherstrip for flush windows or doors of agricultural tractor cabs is generally indicated 1. The weatherstrip 1 is constituted by a profiled section having a front fixing part 2 of relatively stiff elastomeric material and a tubular rear sealing part 3 of soft elastomeric material. The front fixing part 2 and the rear tubular part 3 are normally produced in a single piece by coextrusion. The outer face of the front fixing part 2, that is, the face which faces away from the rear tubular part 3, has a flat surface 4 delimited along one edge by a less-projecting frontal sealing flange 5 and along its opposite edge by a more-projecting lateral tubular sealing appendage 6. Above this lateral tubular appendage 6, the rear tubular sealing part 3 has an outer, laterally-projecting, longitudinal rib 7. Further ribs or ridges 8 are formed on the outer surface of the tubular part 3 facing away from the front fixing part 2. A double-sided adhesive strip, indicated 9, is stuck by its inner adhesive face to the flat outer surface 4 of the front fixing part 2 and a peelable covering 10 is applied to its outer face. In order to apply the weatherstrip 1 to a window or door of a tractor cab, it suffices to remove the peelable covering 10 and stick the outer face of the double-sided adhesive strip 9 along the marginal surface of the inner face of the window or door in the manner illustrated in Figure 2. As can be seen from this Figure, which relates to the application of the weatherstrip 1 to a flush window V, when the weatherstrip 1 is applied, the flange 5 bears against the inner face of the window V along the inner side of the flat surface 4 of the fixing part 2, while the lateral tubular sealing appendage 6 extends freely alongside the peripheral edge of the window V, thus protecting its corner and at the same time enabling close flush coupling with any adjacent window.

Claims: A sealing weatherstrip (1) for windows or doors (V) of agricultural tractor cabs, comprising a profiled section of elastomeric material having a front fixing part (2) and a rear tubular sealing part (3), wherein the front fixing part (2) has a flat outer surface (4) along which a double-sided adhesive strip (9) is applied for sticking the weatherstrip (1) to the inner marginal surface of the window or door (V), characterised in that the flat surface (4) of the front fixing part (2) is planar and in that the inner edge thereof is delimited by a lateral flange (5) for frontal sealing against the inner marginal surface of a flush window or door (V), and the outer edge thereof is delimited by a tubular lateral appendage (6), protruding opposite to the said rear tubular part (3), for lateral sealing of the peripheral edge of the flush window or door (V). A weatherstrip according to Claim 1, characterised in that the rear tubular sealing part (3) has an outer longitudinal rib (7) projecting laterally on the same side as the tubular lateral sealing appendage (6) of the front fixing part (2).

Inventors: SALVINI, TIZIANO
Applicants: SAME S.P.A.
Application year: 1989
Main classification: B60J10
IPC codes: B60J10