Step-out window washer box
AssigneeThe Raymond Lee Organization, Inc.
InventorClarence Ellison
Life of this patent
Estimating the term…
Abstract
A collapsible structure which can be readily erected and supported outside of a window against an external building wall for use by a window washer, and can be withdrawn through the opening of the window after use. The structure is in the form of a rectangular box formed of frame members pivotably fastened to each other and fitted on each side, with a diagonal strut which is pinned in position to hold the structure open, and which bears against an external wall. A pair of horizontal struts extend from the erected box across the sill of a window and are each fitted with pivotal clamp arms to grip the inside structure wall under the window sill to hold the box in position for use.
Claims1
A collapsible frame fitted with means to mount about the interior and exterior surfaces of a vertical wall supporting a window sill bounding a window opening in said wall so as to extend beyond the exterior of the said wall, said frame formed with
- a first pair of clamp plates pivotally mounted to the frame and located to bear against an interior surface of a vertical wall
- a second pair of clamp plates pivotally mounted to the frame and located to bear against the exterior surface of said vertical walls,
- said clamp plates joined by a pair of support members located so as to extend above both pairs of clamp plates and over a window sill of a window opening in said vertical wall, in the erect position of the frame, in which
- the first pair of clamp plates are each pivotally mounted to an individual bar, with each bar pivotally mounted to a separate support member so as to extend on both sides of the support member, by a pin through one of a first plurality of holes in the said bar, with the said bar formed with a second plurality of holes in the end section of the bar that is opposed to the clamp plates, together with
- a bracket individually pivotally mounted to each support member and mounted by a pin into one of the second plurality of holes of the bar so that the clamp plate may be positioned by the bar to the support member by a distance sufficient for the clamp plate and bar to clear an extension of the window sill that projects internally over the interior surface of the mounted vertical wall, in which
- the frame is formed of a structure which forms an open box in the erect position, and in which
- a rod is pivotally mounted to the box unit structure of the frame, said rod joined to the frame so as to be rotatable, when members of the frame are rotated from a first collapsed position to a second erect position, with said rod pivotally mounted to a horizontal section of the box unit that extends parallel to the plane of the window sill when the unit is installed and with said rod located between the support members attached to the first and second clamp plates, with
- said rod extending in the vertical direction when installed so as to extend below the box unit adjacent to the exterior surface of the wall and to extend above the said horizontal section, such that manual rotation of the top section of the bar above the said horizontal section in the installed position causes the lower section of the bar to bear against the lower section of the box unit to rotate the box unit upwards and into the window opening of the wall for purposes of removal of the unit from an attached wall.
Dependencies are inferred from the claim text.