# US 4,397,437 A · Beam clamp > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,397,437 A - Document ID: US4397437A - Status: Granted - Kind: A - Application number: 06/170,794 - Filed: 1980-07-21 - Granted: 1983-08-09 - Earliest claimed: 1980-07-21 - Assignees: Robroy Industries, Inc. - Inventors: Edward A. Madej - Web page: https://patentgrep.com/patent/US4397437A ## CPC - F16L 3/24: with special member for attachment to profiled girders - F16B 2/065: {using screw-thread elements (F16B2/08 - F16B2/12 take precedence)} - F16B 33/004: {Sealing; Insulation (by means of washers F16B43/001)} - F16B 37/14: Cap nuts; Nut caps or bolt caps - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL - F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D) ## Abstract A threaded U-bolt receives a conduit to be clamped to an I-beam. A moisture resistant, polymeric material covers the conduit support portion of the U-bolt with the bolt threads remaining exposed. A clamping member covered with a moisture, resistant polymeric coating includes a first end portion adapted to engage a flange of the I-beam and a second end portion adapted to engage the conduit. A pair of apertures extend through the clamping member. A pair of resilient polymeric annular flanges extend upwardly from the upper surface of the clamping member and around the apertures. The U-bolt threaded ends extend upwardly through the apertures. A pair of polymeric nuts engage the threaded ends above the annular flanges of the clamping member. A resilient sealing flange extends radially from the open end of each encapsulated nut. The nuts are threadedly advanced on the U-bolt threaded ends to position the sealing flanges in contact with the clamping member annular flanges to form a radial, moisture resistant seal around the connections of the nuts to the threaded ends to prevent corrosion of the threaded connections. ## Claims ### Claim 1 Apparatus for supporting a conduit from a structural member comprising, a conduit support having a body portion for receiving a conduit and a connecting portion extending from said body portion, a moisture resistant, polymeric coating on said body portion, a clamping member positioned on said conduit support connecting portion, said clamping member having a body portion with a first end adapted to engage a structural member and an opposite second end adapted to engage a conduit, at least one aperture extending through said clamping member, a moisture resistant, polymeric coating on said clamping member, said clamping member coating forming a resilient annular flange surrounding said aperture, said conduit support connecting portion extending through said aperture and said resilient annular flange, a fastening member releasably engageable with said connecting portion to urge said clamping member first end portion into engagement with a structural member to draw a conduit into abutting relation with the structural member to secure the conduit thereto, a moisture resistant, polymeric coating encapsulating said fastening member and forming a resilient, annular sealing flange, said resilient, annular sealing flange surrounding an opening into said fastening member, said conduit support connecting portion extending into said opening into engagement with said fastening member, a resilient seal boss extending radially inwardly from said resilient, annular sealing flange toward said opening, said resilient, annular sealing flange being urged into surrounding sealing relation with said clamping member annular flange so that said resilient seal boss extends into said aperture as said fastening member is tightened on said clamping member connecting portion and said resilient seal boss engages said clamping member annular flange to provide a moisture resistant seal around said connecting portion at the point where said connecting portion extends through said aperture of said clamping member. ### Claim 2 (depends on 1) Apparatus for supporting a conduit from a structural member as set forth in claim 1 which includes, said fastening member polymeric coating forming a cap around said fastening member, said cap having a closed end portion at one end and an opposite end portion surrounding said opening for passage to said connecting portion into engagement with said fastening member, and a sealing face flaring radially outwardly from said opening to said resilient annular sealing flange. ### Claim 3 Apparatus for supporting a conduit from a structural member comprising, a conduit support having a body portion for receiving a conduit and a connecting portion extending from said body portion, a moisture resistant, polymeric coating on said body portion, a clamping member positioned on said conduit support connecting portion, said clamping member having a body portion with a first end adapted to engage a structural member and an opposite second end adapted to engage a conduit, at least one aperture extending through said clamping member, a moisture resistant, polymeric coating on said clamping member, said clamping member coating forming a resilient annular flange surrounding said aperture, said conduit support connecting portion extending through said aperture and said resilient annular flange, a fastening member releasably engageable with said connecting portion to urge said clamping member first end portion into engagement with a structural member to draw a conduit into abutting relation with the structural member to secure the conduit thereto, a moisture resistant, polymeric coating encapsulating said fastening member and forming a resilient, annular sealing flange, said resilient, annular sealing flange contacting said clamping member annular flange to provide a moisture resistant seal around said connecting portion at the point where said connecting portion extends through said aperture of said clamping member, said fastening member polymeric coating forming a cap around said fastening member, said cap having a closed end portion at one end and an opposite end portion with an opening therethrough for passage of said connecting portion into engagement with said fastening member, said resilient, annular sealing flange surrounding said opening, a sealing face flaring radially outwardly from said opening to said resilient annular sealing flange, said sealing face having a conical configuration decreasing in diameter from said resilient, annular sealing flange radially inwardly to said opening, and said sealing face being operable with said resilient, annular sealing flange to contact said clamping member annular flange in sealing relation to prevent exposure of said connecting portion and said fastening member to moisture. ### Claim 4 Apparatus for supporting a conduit from a structural member comprising, a conduit support having a body portion for receiving a conduit and a connecting portion extending from said body portion, a moisture resistant, polymeric coating on said body portion, a clamping member positioned on said conduit support connecting portion, said clamping member having a body portion with a first end adapted to engage a structural member and an opposite second end adapted to engage a conduit, at least one aperture extending through said clamping member, a moisture resistant, polymeric coating on said clamping member, said clamping member coating forming a resilient annular flange surrounding said aperture, said conduit support connecting portion extending through said aperture and said resilient annular flange, a fastening member releasably engageable with said connecting portion to urge said clamping member first end portion into engagement with a structural member to draw a conduit into abutting relation with the structural member to secure the conduit thereto, a moisture resistant, polymeric coating encapsulating said fastening member and forming a resilient, annular sealing flange, said resilient, annular sealing flange contacting said clamping member annular flange to provide a moisture resistant seal around said connecting portion at the point where said connecting portion extends through said aperture of said clamping member, said fastening member polymeric coating forming a cap around said fastening member, said cap having a closed end portion at one end and an opposite end portion with an opening therethrough for the passage of said connecting portion into engagement with said fastening member, said resilient, annular sealing flange surrounding said opening, and a resilient seal boss extending radially inwardly from said resilient, annular sealing flange toward said opening. ### Claim 5 (depends on 1) Apparatus for supporting a conduit from a structural member as set forth in claim 1 in which, said clamping member body portion is arcuately shaped to form a convex upper surface and a concave lower surface, said resilient annular flange extending upwardly from said convex upper surface around said aperture, and said resilient annular sealing flange being compressed into sealing relation with said clamping member resilient annular flange on said convex upper surface as said fastening member is threadably advanced on said connecting portion into engagement with said convex upper surface. ### Claim 6 (depends on 1) Apparatus for supporting a conduit from a structural member as set forth in claim 1 in which, said clamping member body portion is arcuately shaped to form a convex upper surface and a concave lower surface, a resilient polymeric annular sleeve formed integrally with said polymeric coating on said claimping member on said concave lower surface, said resilient annular flange extending upwardly from said convex upper surface, and said resilient annular sleeve and said resilient annular flange being axially aligned and concentric with said aperture through said clamping member and said resilient annular sealing flange sealingly engaging said resilient annular flange. ### Claim 7 (depends on 1) Apparatus for supporting a conduit from a structural member as set forth in claim 1 in which, said polymeric coating on said conduit support body portion terminating in a reduced diameter coating portion adjacent said connecting portion, said connecting portion being exposed above said reduced diameter coating portion, an enlarged diameter coating portion on said conduit support body portion spaced a preselected distance below said reduced diameter coating portion, a polymeric shoulder separating said reduced diameter coating portion and said enlarged diameter coating portion, said conduit support being adjustably positioned relative to said clamping member between a first position with said polymeric shoulder abutting said clamping member and a second position with said polymeric shoulder spaced from contact with said clamping member, and said connecting portion being concealed within said aperture of said clampng member in said first and second positions. ### Claim 8 (depends on 1) Apparatus for supporting a conduit from a structural member as set forth in claim 1 in which, said clamping member connecting portion being spaced from said resilient annular sealing flange sealingly engaged to said resilient annular flange to form around said connecting portion an annular space sealed to prevent the entrance of moisture therein. ### Claim 9 A corrosion resistant fastener comprising, a fastening member having a body portion with a bore therethrough, a moisture resistant polymeric coating encapsulating said fastening member, said polymeric coating forming a body portion of a preselected thickness around said fastening member, said coating body portion having an open end portion aligned with said fastening member bore and a closed end portion, said closed end portion being longitudinally spaced from said fastening member, an elongated passageway aligned with said fastening member bore and extending from said open end portion through said fastening member bore to said closed end portion, a resilient annular sealing flange extending outwardly from said coating body portion open end portion and operable to form a radial seal around said fastening member, said coating body portion forming a cap around said fastening member, said open end portion being positioned at one end of said cap and said closed end portion being positioned at the opposite end of said cap, said fastening member being positioned closely adjacent to said open end portion, and said cap including a sealing face flaring radially outwardly from said open end portion to said resilient annular sealing flange on said coating body portion. ### Claim 10 (depends on 9) A corrosion resistant fastener as set forth in claim 9 in which, said sealing face has a conical configuration decreasing in diameter from said resilient annular sealing flange radially inwardly to said open end portion. ### Claim 11 A corrosion resistant fastener comprising, a fastener member having a body portion with a bore therethrough, a moisture resistant polymeric coating encapsulating said fastening member, said polymeric coating forming a body portion of a preselected thickness around said fastening member, said coating body portion having an open end portion aligned with said fastening member bore and a closed end portion, said closed end portion being longitudinally spaced from said fastening member, an elongated passageway aligned with said fastening member bore and extending from said open end portion through said fastening member bore to said closed end portion, a resilient annular sealing flange extending outwardly from said coating body portion open end portion and operable to form a radial seal around said fastening member, said coating body portion forming a cap around said fastening member, said open end portion being positioned at one end of said cap and said closed end portion being positioned at the opposite end of said cap, said fastening member being positioned closely adjacent said open end portion, and said cap including a resilient seal boss extending radially inwardly from said resilient annular sealing flange on said coating body portion toward said opening. ### Claim 12 (depends on 9) A corrosion resistant fastener as set forth in claim 9 which includes, said coating body portion having a tubular configuration defined by said open end portion and said closed end portion with said passageway extending therebetween, and said elongated passageway being internally threaded to receive a threaded member. ### Claim 13 (depends on 9) A corrosion resistant fastener as set forth in claim 9 which includes, said fastening member bore being internally threaded, and said elongated passageway being internally threaded to permit axial advancement of a threaded member through said elongated passageway into threaded connection with said fastening member bore. ### Claim 14 (depends on 9) A corrosion resistant fastener as set forth in claim 9 which includes said coating body portion being resilient to permit elongation of said body portion from said closed end portion. ### Claim 15 (depends on 9) A corrosion resistant fastener as set forth in claim 9 which includes, means extending longitudinally and externally on said coating body portion for facilitating the application of torque to said fastening member. ### Claim 16 (depends on 9) A corrosion resistant fastener as set forth in claim 9 which includes, a base member formed integrally with and extending outwardly from said coating body portion, said base member having a lower surface and an upper surface, said resilient annular sealing flange formed integrally with and extending downwardly from said lower surface, and stiffener means formed integrally with and extending upwardly from said upper surface to said closed end portion for strengthening said coating body portion to resist failure upon the application of torque to said coating body portion.