Hermetically sealing closure device having a sliding door

Claim 2

An assembly for hermetically sealing an opening in a wall, said assembly comprising: a. a door having sealing means arranged to hermetically seal said opening, b. two suspension rollers mounted on said door and c. a rail which is fastened to the wall and on which said suspension rollers slidably mount said door and are movable along said rail, said rail comprising, 1. a fixed part and 2. two sections which are movable with respect to said fixed rail part between a first position in which said sections are aligned with the fixed part of the rail and the door is disposed in a raised, clear, position which permits it to move along the rail without obstruction, and a second position in which said sections are displaced downwards and towards the wall with respect to said fixed rail part and the door is applied against the wall so that the opening is hermetically sealed, whereby, when the door is opposite the wall opening, the two rollers engage said two sections respectively to move said two sections downwardly and towards the wall into said second position.

Claim 3

two sections which are movable with respect to said fixed rail part between a first position in which said sections are aligned with the fixed part of the rail and the door is disposed in a raised, clear, position which permits it to move along the rail without obstruction, and a second position in which said sections are displaced downwards and towards the wall with respect to said fixed rail part and the door is applied against the wall so that the opening is hermetically sealed, whereby, when the door is opposite the wall opening, the two rollers engage said two sections respectively to move said two sections downwardly and towards the wall into said second position.

Claim 4

two sections which are movable with respect to said fixed rail part between a first position in which said sections are aligned with the fixed part of the rail and the door is disposed in a raised, clear, position which permits it to move along the rail without obstruction, and a second position in which said sections are displaced downwards and towards the wall with respect to said fixed rail part and the door is applied against the wall so that the opening is hermetically sealed, whereby, when the door is opposite the wall opening, the two rollers engage said two sections respectively to move said two sections downwardly and towards the wall into said second position.

Claim 5

An assembly as claimed in claim 1, wherein each movable section is guided in a slide-way in the fixed part of the rail and incorporates an abutment arranged to cooperate with two travel-restricting stops fastened to the fixed part of the rail and definIng two extreme positions for the said movable section, which correspond respectively to said first and second positions and wherein a return spring is operative between each said movable section respectively and said fixed rail part to thrust a respective movable section towards said first position.

Claim 6

An assembly as claimed in claim 2, wherein said abutment is formed by a member fixed to a lower face of each movable section respectively and projecting beyond each end of the movable section, and one of said travel-restricting stops is formed by the ends of neighbouring fixed sections of the fixed part of the rail adjacent the movable section, and the other travel-restricting stop is formed by a yoke which interconnects the said ends of the fixed rail sections.

Claim 7

An assembly as claimed in claim 1, wherein each suspension roller incorporates two lateral flanges which cooperate with adjacent lateral faces of the rail, and for each movable section of the rail a clearance cut-out is made in at least one of the ends of neighbouring fixed sections of the fixed part of the rail adjacent to the associated movable section, in the lateral face of the or each end which is remote from the wall, this clearance cut-out being so proportioned as to enable it to accommodate the adjacent flange of the roller associated with the said movable section when the particular movable section has been moved into its second position when engaged by the associated roller.

Claim 8

An assembly as claimed in claim 4, wherein in the case of the end of a neighbouring fixed rail section adjacent to a movable section, the clearance cut-out is formed by a surface which is inclined with respect to the longitudinal axis of the rail, which inclined surface, unlike the said movable section, merges into the adjacent lateral face of the said fixed rail part, and said inclined surface has a boundary at the same side as the movable section which is spaced from its other boundary by a distance equal to the horizontal component of the movement of the door.

Claim 9

An assembly as claimed in claim 1, wherein one of the movable sections is fitted with a retractable catch which is able to lock this movable section in said first position and which is controllable by a tongue fastened to a supporting bracket of a roller.

Claim 10

An assembly as claimed in claim 1, wherein the rail is of circular cross-section.

Claim 11

An assembly as claimed in claim 7, wherein each suspension roller has, at its side remote from the wall, a frustro-conical running section the major base of which faces towards the outside of the roller.

Claim 12

An assembly as claimed in claim 3, wherein the sealing means is arranged along the bottom edge of the door and along the top and lateral edges of the door face adjacent the wall, each suspension roller incorporates two lateral flanges which cooperate with adjacent lateral faces of the rail and for each movable rail section two clearance cut-outs are made in the ends of said neighbouring fixed rail sections adjacent said movable sections in those lateral faces of said ends which are remote from said wall for accommodating the adjacent flanges of the rollers when said movable sections are in the second position, each clearance cut-out being formed by a surface which is inclined with respect to the longitudinal axis of the rail and which merges into the adjacent lateral face of said fixed rail part and said inclined surface has a boundary at the same side as the movable section which is spaced from its other boundary by a distance equal to the horizontal component of movement of the door, one of said movable sections being fitted with a retractable catch which locks this movable section in said first position and which is controllable by a tongue fastened to a supporting bracket of a roller, said rail being of circular cross-section and each suspension roller having, at its side remote from the wall, a frusto-conical running section the major base of which faces towards the outside of the roller.