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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 5980174 | System for reinforcing a sandwich panel A system for reinforcing a sandwich panel, the panel having a first exterior skin, an intermediate skin and a second exterior skin, the skins being separated by first and second cores and having a hole bored therethrough of diameter A, the holes in the fi... | 11/09/1999 |
| 5941668 | Spreading anchor A spreading anchor including an anchor rod (2) having, at its one end, a cone-shaped head portion (3) widening in a setting direction and, at its opposite end, a load application element, the anchor further including a sleeve (5, 16) surrounding the ancho... | 08/24/1999 |
| 5938385 | Nested solid, solid wall anchor A solid wall plug-type anchor comprised of a molded extrudible plastic material comprises a central hinge section and at least two extension members longitudinally extending from the hinge section. The hinge section permits the extension members to be hin... | 08/17/1999 |
| 5816759 | Expansion anchor and method therefor An expansion anchor installable in a pre-drilled hole formed in a base material. The expansion anchor includes a bolt having a shaft with a head portion, an opposing end portion, and a threaded portion. A shoulder is disposed on the shaft intermediate the... | 10/06/1998 |
| 5772372 | Spreading anchor A spreading anchor including an anchor rod (2) having a stem (12) provided at its front end, when viewed in a setting direction, with a cone (3) widening outwardly towards its free end and a longitudinally displaceable sleeve (4) pushed over the anchor ro... | 06/30/1998 |
| 5702216 | Expanding wall plug An expanding wall plug including a headed anchoring socket adapted for mounting in a hole in a wall; a screw inserted through the anchoring socket and having a head received in a tapered hole at one end of the anchoring socket, an expansion shell mounted ... | 12/30/1997 |
| 5685678 | Fail-safe anchor bolt assembly for cracked masonry A fail-safe anchor bolt assembly installable in a pre-drilled hole in masonry to fasten a fixture or other object thereto, the assembly remaining securely anchored even should the hole later be enlarged as a result of a crack developed in the masonry. The... | 11/11/1997 |
| 5653074 | Doorframe The present invention relates to a door frame made of wood. The door frame comprises a pair of rails, a pair of stiles and connectors. At each of the connecting ends of the rails and stiles, hollows and holes are formed, into which a connector capable of ... | 08/05/1997 |
| 5593261 | Fail-safe anchor bolt assembly for cracked masonry A fail-safe anchor bolt assembly installable in a pre-drilled hole in masonry to fasten a fixture or other object thereto, the assembly remaining securely anchored even should the hole later be enlarged as a result of a crack developed in the masonry. The... | 01/14/1997 |
| 5288190 | Expansion dowel assembly An expansion dowel assembly for use in undercut bores in a receiving material includes an axially extending anchor bolt with a load application section at a trailing end region of the bolt and an expansion cone at a leading end region thereof. An expansio... | 02/22/1994 |
| 5033910 | Mechanical expansion anchor shell An improved, radially expansible shell for use in a mechanical expansion anchor and an anchoring system including such a shell in combination with a resin grouting mix, in a drill hole of predetermined diameter. The shell includes a plurality of leaf port... | 07/23/1991 |
| 5002445 | Expansible plug assembly to be anchored in a hole drilled in masonry An expansible plug assembly that comprises a fixing bolt, and an expansible sleeve having an expansible portion and an internal thread formed in the expansible portion and engaged with the external thread of the fixing bolt, so that a reliable connection ... | 03/26/1991 |
| 4869631 | Expansion dowel with limited expansion An expansion dowel assembly includes an expansion sleeve, an expanding member and a bolt for pulling the expanding member into the expansion sleeve. The expansion sleeve has a leading end and a trailing end with a bore extending between its two ends. At t... | 09/26/1989 |
| 4784530 | Roof bolt apparatus The apparatus for anchoring a bolt includes an elongated bolt with a threaded portion located at a preselected position along the length of the bolt and spaced from the end portions of the bolt. An expansion shell assembly is positioned on the bolt with t... | 11/15/1988 |
| 4764055 | Resin reinforced expansion anchor system A resin reinforced expansion anchor system for a mine roof support bolt or the like utilizes a specially configured, thin-walled expansion shell together with a thin-walled, dual-taper plug for expanding the shell. The shell and the plug cooperate to impl... | 08/16/1988 |
| 4702654 | Spreading anchor A spreading anchor comprising an anchor rod (1) including a spreading cone (5) on its front end (4) in the direction of insertion of said anchor (1), the spreading cone (5) flaring in the insertion direction and adapted to cooperate with a spreading sleev... | 10/27/1987 |
| 4681493 | Means for maintaining axial stress on a dowel assembly A dowel assembly to be anchored in a borehole in a receiving material includes a container positioned around the axis of the borehole and located between an abutment at one end of the dowel assembly and the receiving material into which the assembly is in... | 07/21/1987 |
| 4640654 | Anchor An anchor for fastening in bore holes comprises an expander body driven into an expansion sleeve, having a slotted expansible portion, by a stay bolt to which a torque is applied to draw the expander body into the expansion sleeve. The expander body has a... | 02/03/1987 |
| 4607992 | Expansion dowel assembly with a spherically shaped spreader An expansion dowel assembly includes an axially elongated expansion sleeve with an axially extending expansion region, a spreader positioned within the sleeves in the expansion region, and a bolt in threaded engagement within a tapped bore in the spreader... | 08/26/1986 |
| 4516885 | Method and apparatus for combining resin bonding and mechanical anchoring of a bolt in a rock formation A mechanical anchor including an expansion shell and a camming plug positioned in the shell is threaded onto the end of a mine roof bolt. A roof support plate is carried on the opposite end of the bolt. The mechanical anchor is inserted in a bore hole dri... | 05/14/1985 |
| 4478542 | Expansion anchor grip sleeve assembly An expansion anchor grip sleeve assembly comprising an anchor grip sleeve axially aligned with an expansion anchor shield. The anchor grip sleeve possesses grasping prongs or locking means which engage the expansion anchor shield. A bolt passes through th... | 10/23/1984 |
| 4474515 | Expansion fastener The utility of an expansion fastener including an externally threaded shaft having a head shaped so as to be capable of being engaged by a manipulative tool, a generally cylindrical longitudinally split sleeve located around the shaft, a nut threaded on t... | 10/02/1984 |
| 4408937 | Anchor bolt An anchor bolt comprising a tension rod with a male screw-threaded section and a frusto-conical head terminating in a cylindrical shank, in combination with a sleeve having a female screw-threaded section and an internal frusto-conical bore. The sleeve ha... | 10/11/1983 |
| 4339217 | Expanding anchor bolt assembly An expanding assembly to be inserted into and set within a preformed hole having a cylindrical portion extending inwardly from a wall surface and having a conical portion flared at a predetermined angle and located at a predetermined distance from the wal... | 07/13/1982 |
| 4330230 | Anchor bolt assembly An anchor bolt assembly insertable in a masonry hole for fastening a fixture thereto. The assembly is constituted by a threaded bolt whose lower end terminates in an expander element, the bolt extending through an expandable sleeve and being threadably re... | 05/18/1982 |
| 4316689 | Anchorage system of the elements to be supported on the completed structure An anchoring system is provided for use in building walls. A drill hole is formed in a wall or floor with a radially enlarged portion. A fixing bolt bearing an anchoring sleeve and a threaded piece is inserted into the hole. The anchorage sleeve having ra... | 02/23/1982 |
| 4278006 | Expansion shell assembly An expansion anchor for a mine roof support bolt having a one-piece shell, a tapered nut and a strap for maintaining the shell and nut in assembled relation. The shell includes a circular collar having four fingers extending therefrom in a generally cylin... | 07/14/1981 |
| 4194858 | Mine roof bolt anchor installation A coil spring having fixedly attached washer members at each end encircles a mine roof bolt and is retained between radially projecting ears on the bolt and an expansion anchor threaded on the bolt. The washer member which engages the bolt ears is slotted... | 03/25/1980 |
| 4056037 | Expanding bolt-like fastening means A bolt fastener of known kind for engagement in a socket is screwthreaded at its outer end, which protrudes for engagement with a nut. The fastener has a waisted portion, including a taper, towards the inner end of the fastener, the taper converging away ... | 11/01/1977 |
| 4011786 | Expandable dowel An expandable dowel for insertion into a borehole comprising an expandable sleeve with one or more slots extending from one end thereof and expandable by at least one expanding member which engages the slotted sleeve, a screw-threaded bolt which is in scr... | 03/15/1977 |
| 3941028 | Mine roof expansion anchor An expansion bolt assembly of the type used in supporting mine roofs including an expansible shell having a tapered plug movable axially therein to force the outer surface of the shell into engagement with the interior of a drilled opening in the mine roo... | 03/02/1976 |
