# US 4,391,428 A · Lance-type fixture support and method of use > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,391,428 A - Document ID: US4391428A - Status: Granted - Kind: A - Application number: 06/344,008 - Filed: 1982-01-29 - Granted: 1983-07-05 - Earliest claimed: 1981-11-16 - Assignees: Lance Austin Enterprises, Inc. - Inventors: Fred K. Grimes - Web page: https://patentgrep.com/patent/US4391428A ## CPC - F24F 13/32: Supports for air-conditioning, air-humidification or ventilation units - Y10S 248/906: Electrical outlet box support - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A support for a ceiling fan or other fixture has a pair of slidably interconnected, pointed lances adapted to be driven into engagement with spaced structural members. A tool-strikable striking element is adapted to be coupled to each lance at a selected location along the length thereof. The support is adapted to be installed through a small hole in a preexisting ceiling or wall. ## Claims ### Claim 1 A support for mounting a fixture between a pair of spaced structural members comprising: a pair of elongated lances slidably interconnected for relative longitudinal sliding movement, each of said lances being shorter than the distance between said structural members and together forming an adjustable length support adapted to span the space between said structural members; member engaging means at the distal end of each of said lances for engaging said structural members and supporting said lances thereon when said lances are independently driven longitudinally in opposite directions against said structural members; at least one tool-strikable striking element adapted to receive a longitudinally directed blow from a striking tool; and striking element coupling means on each of said lances for coupling said striking element to each lance at a fixed location intermediate the ends thereof to enable said lances to be independently driven in opposite directions when said striking element is coupled to each of said lances independently of the other and is struck with said tool, whereby said member engaging means are independently driven into engagement with said structural members. ### Claim 2 A support for mounting a fixture between a pair of spaced structural members comprising: a pair of elongated lances slidably interconnected for relative longitudinal sliding movement, each of said lances being shorter than the distance between said structural members and together forming an adjustable length support adapted to span the space between said members; member engaging means at the distal end of each of said lances for engaging said structural members and supporting said lances thereon when said lances are driven longitudinally in opposite directions against said structural members; a central elongated slot on each of said lances adapted to receive a tool-strikable striking element; and a plurality of longitudinally spaced coupling elements on each of said lances adjacent said slot for coupling said striking element to each lance at a selected fixed location intermediate the ends thereof, whereby said member engaging means are driven into engagement with said structural members when said striking element is coupled to each of said lances and is struck with a tool. ### Claim 3 (depends on 2) A support according to claim 2 wherein each of said coupling elements comprises a pair of opposed notches on the longitudinal edges of said slot, said notches being adapted to receive a plate-like striking element. ### Claim 4 A support for mounting a fixture between a pair of spaced structural members comprising: a pair of elongated lances slidably interconnected for relative longitudinal sliding movement, each of said lances being shorter than the distance between said structural members and together forming an adjustable length support adapted to span the space between said structural members; member engaging means at the distal end of each of said lances for engaging said structural members and supporting said lances thereon when said lances are independently driven longitudinally in opposite directions against said structural members; and striking means associated with said lances intermediate the end of each lance and inwardly of side distal ends and noncontiguous with said member engaging means adapted to receive a longitudinally direct blow from a striking tool and drive each of said member engaging means independently of the other into engagement with said structural members. ### Claim 5 (depends on 4) A support according to claim 4 wherein said striking means can be adjustably positioned along the length of each of said lances. ### Claim 6 A support for mounting a fixture between a pair of spaced structural members comprising: a pair of elongated lances slidably interconnected for relative longitudinal sliding movement, each of said lances being shorter than the distance between said members and together forming an adjustable length support adapted to span the space between said structural members; member engaging means at the distal end of each of said lances for engaging said structural members and supporting said lances thereon when said lances are driven longitudinally in opposite directions against said structural members; and adjustable striking means associated with said lances intermediate the ends thereof adapted to receive a longitudinally directed blow from a striking tool and drive said member engaging means into engagement with said structural members, said striking means comprising a tool-strikable striking element and a plurality of longitudinally spaced coupling elements on each of said lances, each of said coupling elements adapted to engage said striking element. ### Claim 7 (depends on 6) A support according to claim 6 wherein said coupling elements comprise notches adapted to receive said striking element. ### Claim 8 (depends on 6) A support according to claim 6 wherein each of said lances has a central elongated slot, said striking element being receivable within said slot. ### Claim 9 (depends on 8) A support according to claim 8 wherein each of said coupling elements comprises a pair of opposed notches on the longitudinal edges of said slot, said striking element is a plate-like element, and said notches are adapted to receive said plate-like striking element. ### Claim 10 (depends on 6) A support according to claim 6 wherein said striking means comprises a single tool-strikable striking element which is alternately engageable with the coupling elements of said lances. ### Claim 11 (depends on 6) A support according to claim 6 wherein said striking means comprises two tool-strikable striking elements which are separately engageable with the coupling elements of separate lances. ### Claim 12 (depends on 7, 9) A support according to claim 7 or 9 wherein said striking element has an outwardly directed projection which engages the lance adjacent said notches to aid in retaining said striking element in said notches. ### Claim 13 A support for mounting a fixture between a pair of spaced structural members comprising: a pair of elongated lances slidably interconnected for relative longitudinal sliding movement, each of said lances being shorter than the distance between said structural members and together forming an adjustable length support adapted to span the space between said members; at least one pointed penetrating member at the distal end of each of said lances for penetrating and engaging said structural members and supporting said lances thereon when said lances are driven longitudinally in opposite directions against said structural members; an aperture in each of said lances; and a striking element adapted to be received in either of said apertures, abut a transverse edge of the aperture, receive a longitudinally directed blow from a striking tool, and drive the penetrating members into engagement with said structural members, said striking element having a tool-strikable surface, and an outwardly directed projection which engages the lance adjacent the aperture to aid in retaining said striking element in engagement with said aperture. ### Claim 14 (depends on 13) A support according to claim 13 wherein the aperture in one of said lances comprises a central elongated slot and a plurality of longitudinally spaced pairs of opposed notches on the lontitudinal edges of said slot, said striking element engaging a selected pair of opposed notches when engaged with said one lance, and passable through said slot to engage the other lance. ### Claim 15 (depends on 13) A support according to claim 13 wherein the aperture in each lance comprises a central elongated slot and a plurality of longitudinally spaced pairs of opposed notches on the longitudinal edges of said slot, said striking element engaging a selected pair of opposed notches when engaged with one lance, and passable through said slot to engage a selected pair of opposed notches on the other lance. ### Claim 16 (depends on 13, 14, 15) A support according to claim 13, 14 or 15 wherein said outwardly directed projection comprises a shoulder on said striking element. ### Claim 17 In combination with a pair of spaced structural members and a wall member which is supported on and conceals said structural members, a fixture support adapted to be installed between said structural members through a small hole in said wall member which is located between said structural members, the support comprising: a pair of elongated lances slidably interconnected for relative longitudinal sliding movement, each of said lances being shorter than the distance between said structural members and together forming an adjustable length support adapted to pass through the hole in the wall member and span the space between said structural members; member engaging means at the distal end of each of said lances for engaging said structural members and supporting said lances thereon when said lances are independently driven longitudinally in opposite directions against said structural members; and striking means associated with said lances intermediate the ends thereof and adjacent the hole in the wall member adapted to receive a longitudinally directed blow through the hole in the wall from a striking tool and drive each of said member engaging means independently of the other into engagement with said structural members.