GB2026067A

GB2026067A - Seal gasket

Info

Publication number: GB2026067A
Application number: GB7917699A
Authority: GB
Original assignee: HILBE M
Current assignee: HILBE M
Priority date: 1978-05-24
Filing date: 1979-05-22
Publication date: 1980-01-30
Also published as: FR2426794A1; ES243428U; IT7804829V0; ES243428Y

Abstract

A seal gasket 1 especially for motor vehicle doors comprises a double right angled shape, e.g. a T shape, extruded from synthetic rubber together with a metal insert (2), the angles receiving the wall 6 and door 7 respectively. The gasket also has a tongue 10 which is flexible and a portion 9 which is of sponge rubber. The gasket is secured to the wall by screws. <IMAGE>

Description

SPECIFICATION Seal gasket for motor vehicle doors and the like This invention relates to a seal gasket for motor vehicle doors and the like.

Trucks and other similar vehicles provided usually at their rear with sealed doors are used for example for forming a refrigerated environment. The gaskets at present used for this seal often have various drawbacks, both by virtue of a certain structural complexity which prevents their rapid assembly, and with regard to their operation. The gasket often becomes separated and loses its seal.

The object of the present invention is to provide a seal gasket for motor vehicle doors, which is in the form of a single element and tens to ensures a long lasting effective seal.

Within that general aim, it is possible to arrange that the gasket according to the invention is of simple design, of rapid assembly and of easy construction, so that its production becomes inexpensive.

According to one aspect of the invention there is provided a seal gasket for rnotor vehicle doors and the like, comprising a single section coextruded from synthetic rubber together with a metal insert, and arranged to surround the entire opening for a door by being successively bent, said section being substantially in the form of a T or a double right angle in cross-section, so that it adheres to the wall of the opening for said door by way of its first right angle, and it receives the door within its second right angle, said section also comprising, opposite said second right angle, a seal tongue which bends back on contact by said door.

The characteristics will be more apparent from the detailed description of a preferred embodiment of the seal gasket for motor vehicle doors and the like, illustrated by way of example in the accompanying drawing in which: Figure 1 is a cross-section through the gasket alone; Figure 2 is a cross-section thereof when assembled for a door.

With reference to said figures, the reference numeral 1 indicates overall the seal gasket, consisting of a single section of synthetic rubber coextruded with a metal insert constituted by a strip 2.

Preferably said synthetic rubber is a terpolymer of known type, known commercially as EPDM for short.

The section 1 is shaped in cross-section substantially in the form of a T, comprising a portion 3 which constitutes the shank of the T, and respective elements 4 and 5 extending from opposite sides at one end of this latter, and together constituting the cross member of the T to form respective right angles with said shank 3. The cross member 4, 5 is slightly arcuate, with its concavity facing the shank portion 3.

The element 4 is shorter than the element 5, and the right angle which it forms with the shank 3 constitutes a seat for that corner of the wall 6 which is situated at the opening for the access door 7 to a compartment, for example a refrigerated compartment, of a motor vehicle. The shank 3 completely covers the depth of the wall 6.

The strip 2 is disposed in a central position within said shank portion 3, and along its extension it comprises bores 8 uniformly spaced apart for fixing the gasket to said wall 6 by suitable screws.

The shank portion is partly constituted, in that region lying between the strip 2 and the wall 6, of a type of sealing cushion 9 with a slightly arcuate outer profile which has its cavity facing the wall 6 and projects from the shank 3 at the ends of its cross-section. In the cushion 9, said synthetic rubber has the consistency of sponge rubber which is more deformable.

From that end of the shank 3 opposite the cross member 4, 5 there projects a tongue 10, which extends from said shank on the same side as the element 5, towards which it converges, being inclined. The tongue thus lies opposite the right angle 5, 3.

When the door 7 is closed, the tongue 10 bends back into the seat formed by the right angle 5, 3, and remains in contact with, and forms a seal against, the relative sides of the door.

The operation of the gasket thus described is simple and obvious. The section 1 is cut to the length of the perimeter of the door opening, and is bent according to the shape of the opening, after which it is welded together at its ends so that there is no discontinuity.

After assembly in this manner, and then fixing by means of screws, the gasket provides a reliable seal not only by means of the right angles 4, 3 and 5, 3, but also by means of the sponge rubber cushion 9 on the same side as the wall 6, and by means of the tongue 10 which is bent back so that it becomes squeezed between the shank portion 3 and the door 7 on the same side as the door.

1. A seal gasket for motor vehicle doors and the like, comprising a single section coextruded from synthetic rubber together with a metal insert, and arranged to surround the entire opening for a door by being successively bent, said section being substantially in the form of a T or a double right angle in cross-section, so that it adheres to the wall of the opening for said door by way of its first right angle, and it receives the door within its second right angle, said section also compris

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Seal gasket for motor vehicle doors and the like This invention relates to a seal gasket for motor vehicle doors and the like. Trucks and other similar vehicles provided usually at their rear with sealed doors are used for example for forming a refrigerated environment. The gaskets at present used for this seal often have various drawbacks, both by virtue of a certain structural complexity which prevents their rapid assembly, and with regard to their operation. The gasket often becomes separated and loses its seal. The object of the present invention is to provide a seal gasket for motor vehicle doors, which is in the form of a single element and tens to ensures a long lasting effective seal. Within that general aim, it is possible to arrange that the gasket according to the invention is of simple design, of rapid assembly and of easy construction, so that its production becomes inexpensive. According to one aspect of the invention there is provided a seal gasket for rnotor vehicle doors and the like, comprising a single section coextruded from synthetic rubber together with a metal insert, and arranged to surround the entire opening for a door by being successively bent, said section being substantially in the form of a T or a double right angle in cross-section, so that it adheres to the wall of the opening for said door by way of its first right angle, and it receives the door within its second right angle, said section also comprising, opposite said second right angle, a seal tongue which bends back on contact by said door. The characteristics will be more apparent from the detailed description of a preferred embodiment of the seal gasket for motor vehicle doors and the like, illustrated by way of example in the accompanying drawing in which: Figure 1 is a cross-section through the gasket alone; Figure 2 is a cross-section thereof when assembled for a door. With reference to said figures, the reference numeral 1 indicates overall the seal gasket, consisting of a single section of synthetic rubber coextruded with a metal insert constituted by a strip 2. Preferably said synthetic rubber is a terpolymer of known type, known commercially as EPDM for short. The section 1 is shaped in cross-section substantially in the form of a T, comprising a portion 3 which constitutes the shank of the T, and respective elements 4 and 5 extending from opposite sides at one end of this latter, and together constituting the cross member of the T to form respective right angles with said shank 3. The cross member 4, 5 is slightly arcuate, with its concavity facing the shank portion 3. The element 4 is shorter than the element 5, and the right angle which it forms with the shank 3 constitutes a seat for that corner of the wall 6 which is situated at the opening for the access door 7 to a compartment, for example a refrigerated compartment, of a motor vehicle. The shank 3 completely covers the depth of the wall 6. The strip 2 is disposed in a central position within said shank portion 3, and along its extension it comprises bores 8 uniformly spaced apart for fixing the gasket to said wall 6 by suitable screws. The shank portion is partly constituted, in that region lying between the strip 2 and the wall 6, of a type of sealing cushion 9 with a slightly arcuate outer profile which has its cavity facing the wall 6 and projects from the shank 3 at the ends of its cross-section. In the cushion 9, said synthetic rubber has the consistency of sponge rubber which is more deformable. From that end of the shank 3 opposite the cross member 4, 5 there projects a tongue 10, which extends from said shank on the same side as the element 5, towards which it converges, being inclined. The tongue thus lies opposite the right angle 5, 3. When the door 7 is closed, the tongue 10 bends back into the seat formed by the right angle 5, 3, and remains in contact with, and forms a seal against, the relative sides of the door. The operation of the gasket thus described is simple and obvious. The section 1 is cut to the length of the perimeter of the door opening, and is bent according to the shape of the opening, after which it is welded together at its ends so that there is no discontinuity. After assembly in this manner, and then fixing by means of screws, the gasket provides a reliable seal not only by means of the right angles 4, 3 and 5, 3, but also by means of the sponge rubber cushion 9 on the same side as the wall 6, and by means of the tongue 10 which is bent back so that it becomes squeezed between the shank portion 3 and the door 7 on the same side as the door. CLAIMS

1. A seal gasket for motor vehicle doors and the like, comprising a single section coextruded from synthetic rubber together with a metal insert, and arranged to surround the entire opening for a door by being successively bent, said section being substantially in the form of a T or a double right angle in cross-section, so that it adheres to the wall of the opening for said door by way of its first right angle, and it receives the door within its second right angle, said section also compris ing, opposite said second right angle, a seal tongue which bends back on contact by said door.

2. A gasket as claimed in Claim 1, wherein said metal insert is constituted by a strip disposed in the centre of the shank of said T, there extending from one side and the other of one end of said shank two respective elements which form the cross member of the T, and which together with said shank thereof define the first and second said right angle.

3. A gasket as claimed in Claim 2, wherein said strip comprises bores spaced uniformly apart for fixing it by suitable screws to the edge of said wall of the door opening.

4. A gasket as claimed in Claim 1, wherein said synthetic rubber assumes the consistency of sponge rubber in a type of seal gasket which is disposed to the side of said strip and is arranged to rest against the edge of said wall of the door opening.

5. A gasket as claimed in Claims 1 and 2, wherein said cross member is slightly arcuate with its concavity facing said shank of the T, that element of said cross member which is aranged to adhere to the wall of the door opening being smaller than the other element of the cross member.

6. A gasket for motor vehicle doors and the like, substantially as herein described with reference to the accompanying drawing.

7. Any novel element, or combination of elements, herein described and/or shown in the accompanying drawing, irrespective of whether the present claim is within the scope of, or relates to the same invention as, any of the preceding claims.