Sealing arrangement
AssigneeButterworth Systems Inc.
InventorJohn Haggerty
Life of this patent
Estimating the term…
Abstract
A seal for an opening through which an object (e.g. hose pipe) extends which comprises a stack of flexible sheets (1, 2, 3 and 4) one on top of each other, each of at least two adjoining sheets (1, 2) having an aperture therein of dimensions smaller than those of the cross-section of that part of the object contacting the seal and a series of slits radiating from said aperture towards the perimeter of the sheet and each of at least two other adjoining sheets (3, 4) having a series of slits radiating towards the perimeter of the sheet from the center of the sheet, the series of slits in at least two adjacent sheets being offset with respect to each other.
Claims16
A seal for an opening through which an object extends which comprises a stack of flexible sheets one on top of each other, each of at least two adjoining sheets having an aperture therein and a series of slits radiating from said aperture towards the perimeter of the sheet and each of at least two other adjoining sheets having a series of slits meeting each other in an area of the sheet adjacent to said aperture in the apertured sheets and radiating towards the perimeter of the sheet, the series of slits in at least two adjacent sheets being offset with respect to each other.
A seal for an opening through which an object extends which comprises a stack of four flexible sheets of reinforced rubber, one on top of each other, both of two adjoining sheets having an aperture therein and a series of at least three slits radiating from said aperture towards the perimeter of the sheet and both of the two other adjoining sheets having a series of at least three slits meeting each other in an area of the sheet adjacent to said aperture in the apertured sheets and radiating towards the perimeter of the sheet, the series of slits in at least two adjacent sheets being offset with respect to each other.
Dependencies are inferred from the claim text.