# US 11,993,946 B2 · Davit arm base > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,993,946 B2 - Document ID: US11993946B2 - Status: Granted - Kind: B2 - Application number: 17/604,099 - Filed: 2020-04-16 - Published: 2022-07-14 - Granted: 2024-05-28 - Earliest claimed: 2019-04-16 - Assignees: Adam Miller; Robert Miller - Applicants: Adam John Miller; Robert Leslie Miller - Inventors: Adam John Miller; Robert Leslie Miller; Andrew Glover - Web page: https://patentgrep.com/patent/US11993946B2 ## CPC - E04H 12/2269: {in a socket} - B66C 23/166: {Simple cranes with jibs which may be fixed or can slew or luff} - E04C 3/02: Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; {Braces}(E04C3/38 takes precedence; for structures characterised by movable, separable, or collapsible parts E04B1/343; {braced purlins E04B7/024}) - E04C 3/30: Columns; Pillars; Struts (not designed for end loading E04C3/02; posts, masts, as independent structures E04H12/00) - E04H 12/22: Sockets or holders for poles or posts {(for sports articles, e.g. floor sockets A63B71/023; for road signs E01F9/673)} - E04H 12/2253: {Mounting poles or posts to the holder (E04H12/2284 takes precedence; break-away mountings E01F9/631)} - E04H 12/2261: {on a flat base (E04H12/08, E04H12/10 take precedence)} - F16M 11/22: with approximately constant height, e.g. with constant length of column or of legs (F16M11/42 takes precedence) - E04H 12/2215: {driven into the ground (ground anchors E02D5/80)} - F16M 2200/066: being part of the head - F16M 2200/08: Foot or support base - E04H: BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL (foundations E02D) - B66C: CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES ({specially adapted for lifting invalids A61G7/10;} rope, cable, or chain winding mechanisms, braking or detent devices therefor B66D; specially adapted for nuclear reactors G21) - E04C: STRUCTURAL ELEMENTS; BUILDING MATERIALS (for bridges E01D; specially designed for insulation or other protection E04B; elements used as building aids E04G; for mining E21; for tunnels E21D; structural elements with broader range of application than for building engineering F16, particularly F16S) - F16M: FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS ## Abstract A davit arm holder 30,50 for a davit arm 11-18 for suspending lines 4 from elevated heights by mounting the davit arm 11-18 on a structural substrate 1. The davit arm holder 30,50 comprises a base 50 formed from one or more planar layers 52 of sheet material adapted to lie parallel to the plane of a surface of the substrate 1, and an attachment 30 adapted to be fixedly attached to the base 50 and to provide a connection 32 to engage a davit arm 11-18. The base 50 includes an outer layer 52 and at least one inner mount 60. The outer layer 52 has a plurality of first engagement portions 70 that are radially spaced from a centre point 54 of the base 50. The at least one inner mount 60 is integrally formed with the outer layer 52, is fixedly securable to the substrate 1 and is adapted to space an inside surface 68 of the outer layer 52 from the substrate 1 to form a gap 66 under the outer layer 52. The base 50 is adapted to have a low-profile when anchored to the substrate 1. The attachment 30 is adapted to be releasably engaged to the base 50 by a plurality of second engagement portions 40 adapted to engage the corresponding plurality of first engagement portions 70 by rotation of the attachment 30 about an axis 56 perpendicular to the plane of the substrate 1. ## Claims ### Claim 1 A davit arm holder for a davit arm for suspending lines from elevated heights by mounting the davit arm on a structural substrate, said davit arm holder comprising a base formed from one or more planar layers of sheet material adapted to lie parallel to a plane of a surface of the substrate, and an attachment adapted to be fixedly attached to the base and to provide a connection to engage a davit arm, wherein: A. the base comprises: a. an outer layer having a plurality of first engagement portions that are radially spaced from a central region of the base; and b. at least one mount integrally formed with the outer layer, fixedly securable to the substrate and adapted to space an inside surface of the outer layer from the substrate to form a gap under the outer layer, whereby the base is adapted to have a low-profile limited to the thickness of the outer layer and the size of the gap when anchored to the substrate; and B. the attachment is adapted to be releasably engaged to the base by a plurality of second engagement portions adapted to engage the corresponding plurality of first engagement portions by rotation of the attachment about an axis perpendicular to the plane. ### Claim 2 (depends on 1) The davit arm holder of claim 1, wherein the outer layer is in the form of a planar plate and the size of the gap corresponds to the thickness of the at least one mount. ### Claim 3 (depends on 1) The davit arm holder of claim 1, wherein the first engagement portions are aligned tangentially in line with a nominal circle that is concentric with a center point of the central region. ### Claim 4 (depends on 3) The davit arm holder of claim 3, wherein the first engagement portions are in the form of tangentially aligned slots. ### Claim 5 (depends on 4) The davit arm holder of claim 4, wherein the slots are defined by: inner side walls that follow an inner curve that has a general radius less than the nominal circle; and outer side walls that follow an outer curve that has a general radius greater than the nominal circle. ### Claim 6 (depends on 4) The davit arm holder of claim 4, wherein the second engagement portions are in the form of toes that each have a footprint wider than the corresponding slot or each of the toes has a footprint wider in a radial line from the center point than the corresponding slots, such that each toe is adapted, on engagement with the first engagement portions, to be trapped by the outer layer in the gap. ### Claim 7 (depends on 4) The davit arm holder of claim 4, wherein the outer layer is in the form of a base plate adapted to lie parallel to the plane of the surface of the substrate, the slots all face in the same clockwise or anticlockwise direction and comprise a radially outer arm that defines one inside face of an outer wall of each of the slots. ### Claim 8 (depends on 7) The davit arm holder of claim 7, wherein the at least one mount is in the form of a flange that is fixedly securable to the substrate and is adapted to space an inside or underside surface of the base plate from the substrate to form the gap under the outer layer. ### Claim 9 (depends on 7) The davit arm holder of claim 7, wherein each of the plurality of second engagement portions each include an outlying socket plate flange, from which depends a bridging portion supporting a protrusion. ### Claim 10 (depends on 9) The davit arm holder of claim 9, wherein the protrusion is in the form of a foot or toe and the bridging portion is adapted to enter and be engageably retained in the corresponding slot.