Ceiling mounting assembly

Claim 2

A ceiling fixture mounting assembly insertable through a ceiling opening disposed intermediate a pair of overlying ceiling joists comprising, an elongate support member sizeable to be accommodated between said joists and having a pair of oppositely threaded end portions extending outwardly from an unthreaded planar surfaced midportion; a joist-engaging block member threadedly mounted on each of said extending end portions of said support member adapted for individual axial displacement thereon in response to induced rotative displacement of said midportion of said support member relative thereto; prong means extending outwardly from each of said joist-engaging block members for penetrational embedment in said joists in response to outwardly directed axial displacement of said block members; fixture hanger means slideably positionable along said support member for selective location relative to said ceiling opening; means associated with at least one of said joist-engaging blocks for preventing rotative displacement thereof in response to rotative displacement of said elongate support member prior to prong means embedment in said ceiling joists; said last mentioned means being adjustable in length and serving to locate the locus of prong embedment in said joist.

Claim 3

A ceiling fixture mounting assembly insertable through a ceiling opening disposed intermediate a pair of overlying ceiling joists comprising, an elongate support member sizeable to be accommodated between said joists and having a pair of oppositely threaded end portions extending outwardly from an unthreaded planar surfaced midportion; a joist-engaging block member threadedly mounted on each of said extending end portions of said support member adapted for individual axial displacement thereon in response to induced rotative displacement of said midportion of said support member relative thereto; prong means extending outwardly from each of said joist-engaging block members for penetrational embedment in said joists in response to outwardly directed axial displacement of said block members; fixture hanger means slideably positionable along said support member for selective location relative to said ceiling opening; means associated with each of said joist-engaging blocks for preventing rotative displacement thereof in response to rotative displacement of said elongate support member prior to prong means embedment in said ceiling joists; each of said last mentioned means being adjustable in length and serving to both locate the locus of prong embedment in said joist and to position said elongate support member in spaced relation to said ceiling opening.

Claim 4

A ceiling fixture mounting assembly insertable through a ceiling opening disposed intermediate a pair of overlying ceiling joists comprising, an elongate support member sizeable to be accommodated between said joists and having a pair of oppositely threaded end portions extending outwardly from an unthreaded planar surfaced midportion; a joist-engaging block member threadedly mounted on each of said extending end portions of said support member adapted for individual axial displacement thereon in response to induced rotative displacement of said midportion of said support member relative thereto; prong means extending outwardly from each of said joist-engaging block members for penetrational embedment in said joists in response to outwardly directed axial displacement of said block members; fixture hanger means slideably positionable along said support member for selective location relative to said ceiling opening; means associated with each of said joist-engaging blocks for preventing rotative displacement thereof in response to rotative displacement of said elongate support member prior to prong means embedment in said ceiling joists; each of said last mentioned means being adjustable in length and serving to both locate the locus of prong embedment in said joist and to position said elongate support member in spaced relation to said ceiling opening.