US3001251A

US3001251A - Wedge type door gasket

Info

Publication number: US3001251A
Application number: US676661A
Authority: US
Inventors: Leslie M Johnson
Original assignee: Midwest Manuf Corp
Current assignee: Midwest Manuf Corp
Priority date: 1957-08-06
Filing date: 1957-08-06
Publication date: 1961-09-26
Anticipated expiration: 1978-09-26

Description

Sept. 26, 1961 L. M. JOHNSON WEDGE TYPE DOOR GASKET Filed Aug. 6 1957 INVENTOR.

Unite States Patent 3,001,251 WEDGE TYPE DOOR GASKET Leslie M. Johnson, Galesburg, IlL, assignor to Midwest Manufacturing Corporation, Galesburg, 111. Filed Aug. 6, 1957, Ser. No. 676,661 1 Claim. (CI. 20-69) This invention relates to refrigerators and more particularly to a refrigerator door gasket construction.

One of the more serious problems in connection with refrigerators is the provision of sealing means between the door and the cabinet to prevent the ingress of heat when the door is closed. Since the cabinet and door are usually fabricated of sheet metal it is not uncommon for relatively large variations in spacing to occur between the door and the cabinet, with the result that a suitable gasket must be provided, which is compressible or distortable to conform to the variations and thus provide an effective seal.

The compression of the gasket causes a problem because the length of the gasket is substantially equal to or greater than the perimeter of the door opening. In a six foot high refrigerator this could result in 18 feet of gasket. It should be borne in mind that it takes a. certain amount of pressure per foot to compress this gasket and if it required three pounds per foot this would require 54 pounds of pressure on the holding latch. Therefore, it can be appreciated that the easier a gasket can be deformed to conform to the irregularities of the door the less strain is placed upon the latch.

In the construction of such a gasket as previously described and since the gasket extends throughout the periphery of the door, it will be appreciated that a rubbing action occurs particularly on the hinge side of the cabinet. Therefore, the gasket must be capable of permitting this rubbing action without permanent deformation thereof and that it have the ability to slide over the cabinet upon the door closing and still retain an effective seal. By the present invention I have provided a gasket which requires less eifort to deform'and therefore enables an easier operating door latch to be used and at the same time it resists the type of deformation that would affect its sealing properties as it rubs against the cabinet.

Still other advantages of the invention and the invention itself will become more apparent from the following description of an embodiment thereof which is illustrated in the accompanying drawing and forms a part of this specification.

In the drawing, the figure of the drawing illustrates a horizontal section through a refrigerator door and gasket, the position of the gasket relative to the cabinet being shown by dashed lines.

In the drawing the door is illustrated at having an internal flange 11 which is disposed in overlapping relation to the margin 12 of a door liner 13. The gasket is provided with a flat base having a toe portion 20a arranged to seat against the door liner, the remainder of the base resting against the flange 11. The gasket is provided with an upwardly extending portion 21 which may curve over the base 11, as indicated at 22, and provided with a downwardly extending toe 23 which engages with the inner face of the liner. Preferably this bowed portion is made in the form of discrete

angular portions

22a, 22b and 22c, although it may be continuously curved.

Extending laterally from the edge 21 of the body is an arm 25 spaced upwardly from the base 20 and extending over the flange 11 adjacent the edge of the door where it is provided with a downwardly extending toe 26. At approximately the center of the arm 25 there is provided an obliquely extending portion 28 which ex- 3,001,251 Patented Sept. 26, 1961 tends at a right angle to the part 22a. The arm 28 extends slightly beyond the level of the part 22b and at its end is connected by a thin resilient web 30-31 which engages with the part 22a at its juncture with the part 2212 to provide therein a square or rectangular duct 32. From the top of the arm 28 there is provided a downwardly extending arm 33 which merges with the base 25 to provide a triangular opening 34 therebetween.

The rectangular space 32 is adapted to receive therein a stufling of sponge rubber which may be square in cross section and substantially fills the space 32. This material, as stated, may be sponge rubber or any other highly resilient deformable compressible material.

As will be appreciated from viewing the dotted line 40, which represents the front of the cabinet adjacent the hinge, when the door is moved to a closed position the portion 3031 is dragged across the face in a clockwise direction and because it slants in the direction as shown, it drags easily across the face and does not have the tendency to wrinkle up or provide kinks or bulges that would interfere with its sealing operation, and once the dragging movement stops, as when the door is closed, the tendency of the web and spongy material is to straighten itself out and provide an even more effective seal. The support for the outer base of the web, which may be considered as the

portion

25, 2S and 33, also provides stiffness for the support at this point. Because the junc ture of the web 30-31 is substantially a point, it provides a line contact which enables it to be compressed easily and provides a good seal with the cabinet.

Although the base 25 is shown with a toe 26 which engages with the flange 11, this flange may be removed to provide a clearance space for a trim strip on the flange should it be desired.

Having thus described my invention I am aware that numerous and extensive departures may be made therefrom without departing from the spirit of the invention as defined in the appended claim.

I claim:

A gasket for sealing a door member when said door member is in closed position with respect to a door frame member, said gasket being arranged for attachment to one of said members and for engagement with the other of said members, said door member being mounted for pivotal movement with respect to said door frame member whereby said gasket may be subjected to sliding movement with respect to the other of said members during final relative closing movement of said members, said gasket comprising a base portion arranged for attachment to one of said members and a sealing portion of generally rectangular cross-section arranged to engage a face on the other of said members when said members are in substantially closed relative positions, said sealing portion being integral with said base portion and so oriented with respect thereto that a single edge thereof is arranged for engagement with said face of said other member, said sealing portion being substantially filled with flexible, resilient material, the two inner sides of said sealing portion adjacent said base portion being relatively stiff and firmly oriented with respect to said base portion, and the two outer sides of said sealing portion adjacent said single edge being relatively flexible and resilient, whereby distortion of said gasket accompanying final closing movement of said door member is substantially confined to distortion of said filling material and of said two outer sides of said sealing portion, the outer side of said sealing portion which faces generally in the direction of sliding movement of said gasket with respect to said other member during final relative closing movement of said members being disposed at a smaller angle References Cited in the file of this patent UNITED STATES PATENTS Carney Aug. 24, 1943 Norrish Nov. 7, 1950 4 Iarrow June 15, 1954 Bright May 22, 1956 Morton Feb. 18, 1958 Fulton r Aug. 26, 1958 FOREIGN PATENTS France Dec. 30, 1953