Ring Or Sleeve Type Patents (Class 411/65)
  • Patent number: 10202998
    Abstract: An anchor (1) that can be secured in a drilled hole (2), with an expansion sleeve (10) for anchoring onto a wall of the drilled hole, and with an anchor bolt (20) that passes through the expansion sleeve and that has an expansion section (38) for widening the expansion sleeve, and it also has a sleeve stop (22) that limits axial movement of the expansion sleeve away from the expansion section (38) is provided. At least one rotary catch (24) is provided which non-rotatably couples the expansion sleeve (10) to the anchor bolt (20), and the expansion sleeve has at least one external thread helix (14) for creating an undercut in the wall of the drilled hole.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: February 12, 2019
    Assignee: Hilti Aktiengesellschaft
    Inventors: Falk Rosenkranz, Michael Beckert, Christoph Hakenholt
  • Patent number: 7534266
    Abstract: An implant for intersomatic fusion of two adjacent vertebrae, particularly by an operation that was performed in posterior manner. The implant has a first implant part and a second implant part that is adjustable relative to the former, for the purpose of distraction. The first implant part and the second implant part are structured so that they supplement one another, in a complementary manner, in the non-distracted state, to form a pipe that is divided in the longitudinal direction. Guide surfaces that extend radially in the distraction direction, and rest against one another are formed on the first implant part and the second implant part. The relative position of the guide surfaces is fixed in place. An instrument for the placement and distraction of the implant is also provided.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: May 19, 2009
    Assignee: Ulrich GmbH & Co. KG
    Inventor: Patrick Kluger
  • Patent number: 7374370
    Abstract: A rock bolt anchor includes a top portion permanently fixed to a bottom portion. The top portion carries a package of resin. A spring-loaded mechanism pressurizes the package and forces the resin out when the package is lanced. The bottom portion main body carries a pair of opposed outer shells in a dovetail joint on opposed tapers. The annulus adjacent to the rock bolt anchor is sealed by top and bottom bulkheads. The bottom portion is threaded onto a rock bolt. A hollow and ported lance is threaded onto the exposed end of the rock bolt. The combination is inserted into a drilled hole and the rock bolt rotated. The lance rises and pierces the package releasing into the sealed annulus. Continued rotation of the rock bolt, forces the main body down and the outer shells up the tapers compressing them against the wall of the drilled hole.
    Type: Grant
    Filed: January 4, 2005
    Date of Patent: May 20, 2008
    Inventor: Wilfred G. Morris
  • Patent number: 6712572
    Abstract: An expansion dowel having a cylindrical expansion body (1) having a through-bore (3) and formed of at least two segments (4a, 4b) connected with each other, an additional expansion element (7) located in a recess (8) formed in an outer profile (6) of the expansion member (1) and having a radial depth of the recess (8) diminishing in a setting direction (S) of the expansion dowel; the additional expansion element (7) having a radial extent at least partially greater than a maximal dept of the recess (8).
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: March 30, 2004
    Assignee: Hilti Aktiengesellschaft
    Inventors: Heinz Bisping, Alois Kölbl, Jürgen Wieser, Claudia Zimmerer
  • Patent number: 6282999
    Abstract: A plumbing tool is constructed for installing and removing plumbing parts such as tub and sink drains that are engaged together by conventional right-hand threads, one within another. The tool can also be constructed to remove or install left-hand parts. The plumbing extraction and installation tool has an elongated core member with a stud at one end, a cylindrical intermediate section threaded with right-hand threads, and an outwardly flared frustoconical section at the end opposite the stud. A barrel member is internally threaded with right-hand threads at one end and a radial channel is defined in its inwardly facing wall. This channel is bounded by a radially inwardly directed annular lip at its lower extremity. A plurality of wedge members have hooks or tangs at their upper proximal ends that are captured between the barrel member and the core member.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: September 4, 2001
    Assignee: Pasco Specialty & Mfg. Co., Inc.
    Inventors: Michael J. Hite, Lawrence P. Gillen
  • Patent number: 6062783
    Abstract: An expanding bush and captive bolt assembly (1), comprising a bolt (2), a generally cylindrical bush (4), and a ring clip (6) that retains the bush on the bolt. The bush (2) has an inner surface with a portion (22) that has a frustoconical taper, a channel (12) that extends circumferentially inside the bush, and an expansion split or slot (7) so that the bush may be expanded radially. The bolt (2) has a threaded portion (10) for engaging with a socket that has a matching thread, a head (8) by which the bolt may be rotated to tighten the bolt (2) to the socket and to squeeze axially the bush (4), a shaft (18,20,23) between the head (8) and the threaded portion (10), said shaft having a portion (20) with a taper that engages with the tapering portion (22) of the bush to expand the bush (4) as it is squeezed axially between the taper (20) and the socket, and a channel (16) that extends circumferentially around the shaft and which opposes the channel (12) of the bush.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: May 16, 2000
    Assignee: Jaguar Cars, Limited
    Inventor: Stephen Eric Austin
  • Patent number: 5960654
    Abstract: A spare tire carrier lock including a split body collectively formed of at least two body sections, wherein the exterior shape of the split body is complementary to the shape of a predetermined socket of a hoist shaft of a hoist assembly for a spare tire carrier so as to be drivably received into the socket. The body sections are resiliently conjoined to form the split body via at least one, preferably two, resilient members. The split body has a first end at which a tapered seat is formed. A body shaft runs from the seat to a second end of the split body. A tapered armature is shaped to be seatably received by the seat and is provided with a threaded bore for being aligned with the body shaft. A head is located at the second end of the split body having a diameter which prevents its being received into the socket. A head shaft is provided in the head for being aligned with the body shaft, wherein opposite the split body, the head shaft is enlarged to form a recess.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: October 5, 1999
    Inventor: Charles G. Stanalajczo
  • Patent number: 5846041
    Abstract: An expandable anchor assembly is provided for anchoring the threaded end portion of an elongated roof bolt in a borehole. The anchoring assembly includes a hollow outer sleeve in the form of a plurality of symmetrically arranged, longitudinal segmented wall portions with exterior gripping teeth and an inner expander sleeve in the form of a corresponding plurality of longitudinal wall portions symmetrically arranged about a central axis to define an inner threaded cylindrical section. The inner sleeve is captured within and moveable axially relative to the outer sleeve. As the threaded end portion of the elongated bolt is inserted into the inner threaded cylindrical section of the inner sleeve from the trailing end to the leading end thereof, the inner sleeve expands over and clamps around the threaded end portion of the elongated bolt.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: December 8, 1998
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: John E. Bevan, Grant W. King
  • Patent number: 5344257
    Abstract: A bail element (10) having a medial portion (12) with a pair of legs (14, 16) extending integrally therefrom and a mechanical expansion anchor having a pair of shell halves (68, 70) and tapered plug (80) held in assembled relation by the bail. The bail legs are identical to one another and, prior to assembly with the shell halves and plug, have three distinct, linear portions (46, 48, 50) respectively extending at preferred angles of about 10.degree., 36.degree. and 12.5.degree. with respect to lines parallel to the bail centerline (A--A). The bail medial portion includes a pair of upstanding portions shown in a first embodiment (34, 36) and a second embodiment (54, 56) for puncturing a resin cartridge which may be installed with the anchor.
    Type: Grant
    Filed: December 2, 1992
    Date of Patent: September 6, 1994
    Assignee: The Eastern Company
    Inventors: Raymond L. Wright, Carl A. Clark
  • Patent number: 5284409
    Abstract: An anchor comprising a core including first and second ends and a cylindrical portion between said ends, the first end including means for engaging with a body to be anchored, and the second end terminating in a portion which is enlarged gradually. A sleeve engages telescopically around the cylindrical portion and has an end adjacent the second end of the core. Expanders which normally form an annulus when positioned together are provided, the annulus engaging slidably with the cylindrical portion. Each of the expanders has an engaging end which abuts on and engages with the end of the sleeve. Means is provided on the expanders for at least provisionally binding them around the core.
    Type: Grant
    Filed: August 7, 1992
    Date of Patent: February 8, 1994
    Assignee: Kabushiki Kaisha Miyanaga
    Inventor: Masaaki Miyanaga
  • Patent number: 5263803
    Abstract: Sleeve anchor comprising a tapered stem increasing in section to form a head at one end, at least the end portion of the stem remote from the head being threaded, a tubular sleeve placed over said stem being retained between the head and a threaded retaining member screwed onto the threaded end of the stem and in which the retaining member may also serve to hold a component to be attached to the anchor. Ratchet teeth are provided on the inner face of the retaining member and on the end of the tubular sleeve adjacent to the retaining member whereby in operation the two sets of teeth are engaged so that the sleeve is positively rotated with the retaining member and the outer wall of the tubular sleeve is further provided with radially-directed cutting teeth which engage the walls of the bore hole into which the anchor is inserted as the tubular sleeve is simultaneously rotated and expanded by the action of the tapered stem.
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: November 23, 1993
    Assignee: Emhart Inc.
    Inventor: Robert P. Anquetin
  • Patent number: 5226678
    Abstract: A split gland having only three parts to obtain effective stability to relative motion of the constituent half-gland members. A large area clamping ring generates a clamping force effective to maintain the alignment between male and female mirror image half-gland members. Ease of manufacture and use result from the reduction in complexity of the present invention.
    Type: Grant
    Filed: August 31, 1989
    Date of Patent: July 13, 1993
    Inventor: Joseph J. Petranto
  • Patent number: 5219248
    Abstract: A mine roof expansion anchor having a conventional tapered camming plug and radially expansible shell having associated therewith an element which resiliently engages the wall of a bore hole as a roof bolt carrying the anchor is inserted in the hole. The resilient element may be incorporated in the structure of a bail having bore wall engagement portions position in a plane closer to the lower end of the expansion shell than the lowest position of the tapered plug after full expansion. The engagement portions may comprise outwardly and downwardly extending portions of the bail legs, either at the terminal ends or pierced from the bail material slightly above the ends. In another embodiment, the engagement portions extend from a support nut positioned on the bolt below the lower end of the shell.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: June 15, 1993
    Assignee: The Eastern Company
    Inventor: Raymond L. Wright
  • Patent number: 5178501
    Abstract: A fastener system for precision mounting of body parts to a frame in spite of unavoidable manufacturing variations, composed of an anchor hole in a frame and an axially adjustable screw anchor seated stationarily into the anchor hole. The axially adjustable screw anchor includes a base for seating into the anchor hole in the frame, an axial sleeve provided in the base, a plunger slidably mounted within the axial sleeve, and a gap connected with the plunger for providing a mounting surface for the body part being mounted to the frame. the plunger and the cap are each provided with an axial hole for a common self-tapping screw-type fastener. In operation, when a tool brings the body part into a predetermined precise relationship with respect to the frame, the body part engages the mounting surface of the cap and causes the plunger to slide into the axial sleeve exactly the right amount so that the mounting surface of the cap is located precisely where the body part is to be mounted for a precise fit.
    Type: Grant
    Filed: October 29, 1991
    Date of Patent: January 12, 1993
    Inventor: Arturo R. Carstairs
  • Patent number: 5116176
    Abstract: An expansion anchor capable of being expanded by thrusting a lock plug into a contacted portion to spread a clamp member having acutely angular peripheral edges. When the anchor is expanded within a hole in a rigid material such as concrete, the angular edges of the clamp member bite into the rigid material, so that the anchor is no longer removable from the rigid material.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: May 26, 1992
    Assignee: Yoshino Seiki Inc.
    Inventor: Yoshino Yousuke
  • Patent number: 5112160
    Abstract: This invention relates to a rock anchor which includes an elongated element which is composed of a plurality of elongated tension members which are arranged around the long axis of the elongated element in a circumferential spaced relationship to provide a passage through the elongated element, slots between the tension members which extend over the length of the elongated element, an anchor at one end of the elongated element, for holding the element in a hole and a tensioning arrangement at the other end of the element for use in tensioning the elongated element in the hole. The anchor is preferably a wedge anchor and the invention extends to a method of anchoring the rock anchor in a hole by means of a rod which is passed up into the elongated element from the mouth of the hole to tension the elongated element and activate the wedge anchor to lock the anchor against the side of the hole to hold the elongated element in the hole under tension.
    Type: Grant
    Filed: July 26, 1989
    Date of Patent: May 12, 1992
    Assignee: Delkor Technik Limited
    Inventors: Erik D. Jensen, Richard R. Wood
  • Patent number: 5090857
    Abstract: A metallic threaded composite fastener, particularly suited for high temperature applications, has a body member made of high temperature-resistant composite material with a ceramic coating. The body member has a head portion configured to be installed in a countersunk hole and a shank portion which is non-circular and tapered. One part of the shank may be non-circular and the other part tapered, or the two types of surfaces could be combined into a frustum of a non-circular cone. A split collar member made of high strength, high temperature-tolerant metal alloy is split into two halves and the interior of the halves are configured to engage the shank. The exterior of the collar has external threads and the upper portion of the collar has a circumferential groove which receives a lock ring to secure the collar halves to the shank.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: February 25, 1992
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Thomas J. Dunn
  • Patent number: 5059073
    Abstract: A peg for anchoring within a hole having an undercut portion comprises a body (1) with an external end (5) for mounting an element thereon and a tapered internal end (11) widening out towards the inside of the hole, a locking ring (2) formed from segments disposed about the body and intended to pivot within the undercut portion (10). The external diameter of the ring (2) is equal to that of the hole (8). Means (4,14,19) for temporarily immobilizing the segments of the ring are mounted upon the body. Means fixed upon the body may drive the ring (2) into the vicinity of the undercut portion of the hole and radially acting means (4) may cause the segments of the ring (2) to pivot into the undercut portion.
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: October 22, 1991
    Assignee: Societe de Prospection et d'Inventions Techniques (S.P.I.T.)
    Inventors: Gerard Revol, Jean-Paul Barthomeuf
  • Patent number: 4968198
    Abstract: A blind fastener is disclosed. The fastener comprises a tubular nut, a buckling sleeve and a mandrel. The buckling sleeve on one of its ends has a bearing face radially overhanging a facing restraint face of the tubular nut, and a tapered surface which deforms upon threaded drawing of the mandrel through the nut to approach the shape of a plane normal to the axis of the fastener.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: November 6, 1990
    Inventor: Lloyd S. Binns
  • Patent number: 4883396
    Abstract: A dual expansion and non-expansion anchor comprising a pair of inner and outer expansion fasteners connected to each other by means of a screw-threaded connecting tie, said expansion fasteners being adjustable on the connecting tie to adjust to the spaced positions of an inner supporting structure and an outer supported wall. Insertion limiting means is provided to limit insertion of the inner fastener into the inner supporting structure in order to fix the position of said inner fastener in said supporting structure. Torque applying means applied to the connecting tie inserts and sets the inner fastener. Torque applying means applied to a nut on the connecting tie expands the outer expansion fastener.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: November 28, 1989
    Assignee: U.S.E. Diamond, Inc.
    Inventors: Alfred A. Shamah, James R. Schroeder
  • Patent number: 4861198
    Abstract: An improved expansion assembly for a mine roof bolt has a tapered plug, two expansion leaves that bear against the tapered plug, a bail that connects the expansion leaves and extends over the end of the mine roof bolt, and a breakable holding ring to keep the expansion assembly assembled until after it is placed into the bore hole. The tapered plug has a threaded bore therethrough for threading onto the mine roof bolt. The tapered plug also has tapered surfaces that have an angle of taper of 80.degree. to the axis of the mine roof bolt. The expansion leaves each have nine serrations formed on the surface such that the serrations are formed by the intersection of a planar surface perpendicular to the axis of the mine roof bolt and a frusto-conical surface. The frusto-conical surface is at an angle of 69.degree. to the planar surface. The serrations are equally spaced from each other and have a peak to peak distance of 0.25". The expansion leaves each have a maximum length of 3".
    Type: Grant
    Filed: November 22, 1988
    Date of Patent: August 29, 1989
    Assignee: Jennmar Corporation
    Inventor: John C. Stankus
  • Patent number: 4614471
    Abstract: An expansion anchor is used in a hole in a receiving material where the hole is undercut. The expansion anchor includes an axially elongated anchor sleeve containing slots extending in the axial direction. Expansion interlock members are radially displaceably mounted in the slots. A fastening bolt can be threaded into the sleeve so that it radially displaces and secures the interlock members in the undercut portion of the hole. Each interlock member has a shaped surface facing radially inwardly in the sleeve and the shaped surface is contacted by the fastening bolt as it is moved into the sleeve. The trailing end of the shaped surface is formed so that it is not contacted by the fastening bolt as the bolt is moved through the sleeve.
    Type: Grant
    Filed: March 27, 1984
    Date of Patent: September 30, 1986
    Assignee: Hilti Aktiengesellschaft
    Inventor: Bernd Mauritz
  • Patent number: 4613264
    Abstract: An anchor bolt for clamping an object tightly against a receiving surface comprises a threaded elongated anchor rod having a head, an expansion body threadedly received on the rod in spaced relation to the head, and an expansion sleeve on the expansion body that is expanded as the rod is threaded into the expansion body. The anchor rod extends through an outer sleeve between an abutment on the head and an abutment on the expansion body, and spacers, such as a coiled spring or further sleeves, are provided between the anchor rod and the outer sleeve. The bolt provides improved shear resistance and anti-vibration efficiency.
    Type: Grant
    Filed: December 14, 1983
    Date of Patent: September 23, 1986
    Inventors: Douglas O. McIntyre, Robert W. Limbrick
  • Patent number: 4611485
    Abstract: A high pressure pipe stopper includes an elongated stem having a threaded section and terminating at a first end in a conically shaped mandrel having an exterior surface sloped at an angle of about 5.degree.. The pipe stopper also includes a plurality of grip segments about the stem and a nut engaged with the threaded section to force the grip segments up along the mandrel. The pipe stopper may also include an extractor coupling connected between the nut and grip segments such that the grip segments are drawn down the mandrel when the nut is turned away from the mandrel.
    Type: Grant
    Filed: December 3, 1984
    Date of Patent: September 16, 1986
    Assignee: Thaxton, Inc.
    Inventor: Bruce E. Leslie
  • Patent number: 4602500
    Abstract: A leakage testing apparatus includes a pull bar surrounded by an array of arcuate segments having teeth that engage and deform the inner surface of a tube. When tension is applied to the pull bar, a cam forces the segments to move outwardly to contact the tube while maintaining a parallel relationship to said pull bar.
    Type: Grant
    Filed: August 30, 1985
    Date of Patent: July 29, 1986
    Assignee: Haskel, Inc.
    Inventor: John W. Kelly
  • Patent number: 4602902
    Abstract: An expansion dowel assembly includes an axially elongated sleeve having a leading end and a trailing end, an axially extending spreading member located within the sleeve adjacent its leading end, and a threaded bolt extending into the trailing end and toward the leading end of the sleeve. The threaded bolt is axially movable within the sleeve between a first position where the dowel assembly can be inserted into the borehole and a second position where the bolt is driven further into the sleeve into expanding contact with the spreading member for radially expanding the spreading member and the sleeve. An abutment is provided for the leading end of the dowel assembly to prevent displacement of the spreading member out of the sleeve when the bolt is driven from the first position toward the second position.
    Type: Grant
    Filed: June 22, 1982
    Date of Patent: July 29, 1986
    Assignee: Hilti Aktiengesellschaft
    Inventor: Armin Herb
  • Patent number: 4519735
    Abstract: An expansion anchor (3) is provided for retention in an approximately cylindrical well hole (7) having a conical enlargement (9) at a distance from the well opening and widening toward the well hole floor. The expansion anchor (3) is provided on its sleeve or ring-shaped latch supporting member (21) with at least two latches (31) flaring downhole and adapted to be deflected into the enlargement (9). Screwed onto a threaded spindle (11) extending through the latch supporting member (21) is an expansion cone (23) tapering up to the well opening, by means of which the latches (31) are urged into surface engagement with the conical enlargement (9) in the wall of the well hole. The expansion cone (23) is provided with an abutment (33) facing uphole, and the latch supporting member or the latches are provided with an oppositely facing abutment (32) extending into the withdrawal path of the expansion cone (23).
    Type: Grant
    Filed: September 29, 1981
    Date of Patent: May 28, 1985
    Assignee: Werkzeugfabrik Fritz Machtes GmbH & Co. K.G.
    Inventor: Roland Machtle
  • Patent number: 4500239
    Abstract: Toggle bolt (10) which can be set interlockingly in an undercut bore (12) and having locking elements disposed for pivoting on the toggle bolt front end and biased by a spring (32) for an excursion into the position of engagement with the undercut (16).The locking elements (22) are secured against excursion by a clasping element (46) embracing them, which has the form of a plastic sleeve (48) from whose rearward end a circumferential annular flange projects radially whose outside diameter is greater than the diameter of the corresponding mounting bore (12). Upon the introduction of the toggle bolt (10) into the mounting bore (12), the annular flange (50) holds the clasping element (46) back at the outer end of the mounting bore, the locking elements (22) being pushed out of the sleeve (48) and being then able to swing out freely.Thin tabs (42) pointing radially inward on the sleeve (48) prevent a premature pushing of the clasping element (46) away from the locking elements (22) prior to the setting process.
    Type: Grant
    Filed: August 25, 1982
    Date of Patent: February 19, 1985
    Inventor: Heinrich Liebig
  • Patent number: 4402639
    Abstract: An anchor bolt is arranged to be secured in a relatively deeply drilled hole having a conical enlargement adjacent the base or inner end of the hole. The anchor bolt is formed of an axially elongated tie rod and an anchor located on the end of the tie rod which is inserted into the base of the drilled hole. The anchor is made up of a number of radially expandable sleeve segments. The anchor also includes a cone element for expanding the sleeve segments radially outwardly into the conical enlargement in the hole. The sleeve segments have an outside radius variable in the axial direction of the segments. The radially outer surface of the segments is substantially smooth for their axial length. At the smaller diameter end of the sleeve, the segments are held together by an annular elastic disc.
    Type: Grant
    Filed: March 12, 1981
    Date of Patent: September 6, 1983
    Assignee: Hilti Aktiengesellschaft
    Inventor: Jurgen Kessler
  • Patent number: 4315708
    Abstract: Toggle (10) which can be set form-fittingly on the undercut surface of a bore, having an elongated fastening bolt (18) on whose bore-internal end locking elements (22) are mounted, which can be rocked outwardly by a conical component (28) disposed axially displaceably on the fastening bolt (18) from a position lying within the diameter of the bore (12) to a position engaging the undercut surface (17). The locking elements (22) are supported on a bottom piece (20) on the bore-internal end of the fastening bolt (18) and have the form of sleeve segments integrating, in the non-outspread position, a thick-walled sleeve. Between the axially displaceably disposed conical component (28) and a bolt head, or a nut (38), there is disposed a coil spring (32) which can be placed under bias by axial compression.
    Type: Grant
    Filed: February 20, 1980
    Date of Patent: February 16, 1982
    Inventor: Heinrich Liebig
  • Patent number: 4293259
    Abstract: Toggle which can be set against the face of an undercut provided within a bore, and having an elongated bolt, on whose bore-internal end locking elements are mounted, which, by means of a conical component disposed for axial displacement on the bolt, can be expanded outwardly from a position in which they are within the diameter of the bore to a position in which they engage the face of the undercut. The locking elements are supported on a bottom piece on the end of the bolt within the bore, and are in the form of segments of a thick-walled cylinder when in the retracted position. A variety of anti-rotational means are provided to prevent the toggle from turning during the setting operations.
    Type: Grant
    Filed: December 1, 1978
    Date of Patent: October 6, 1981
    Inventor: Heinrich Liebig
  • Patent number: 4290338
    Abstract: The subject invention relates to a straddle cartridge for a straddle cartridge anchor having a central bore which is adjusted to the conicity of the anchor head and wherein the cartridge parts are held together by means of straddle members arranged in succession parallel with respect to the cartridge axis and in direction of the thick ends of the cartridge parts extending outwardly from the outer walls of the cartridge parts.
    Type: Grant
    Filed: July 17, 1979
    Date of Patent: September 22, 1981
    Assignee: GD-Anker Gebirgs-Dubel-Anker GmbH & Co. KG
    Inventor: Rudolf Gruber