Patents Assigned to Fischerwerke
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Patent number: 5193957Abstract: The fixing element for securing an article on a base material includes a shank having a shank portion for receiving an article to be fixed, a reduced diameter portion having opposite ends including a free end and an expander cone located at the free end; and an expansible resilient sleeve received on the reduced diameter portion and having at an end remote from the expander cone lugs which are bent inwards at one obtuse angle. The lugs have end surfaces facing a transition shoulder between the other end of the reduced diameter portion and the shank portion. The expansible resilient sleeve has a length greater than the length of the reduced diameter portion. The expandsible resilient sleeve also has, in an unstressed condition, a sleeve outer diameter larger than the shank portion diameter and a sleeve inner diameter larger than said reduced diameter portion diameter.Type: GrantFiled: September 9, 1991Date of Patent: March 16, 1993Assignee: fischerwerke Artur Fischer GmbH & Co KGInventor: Artur Fischer
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Patent number: 5163789Abstract: A device for producing drilled holes with an undercut in facing panels includes a drill bit with a drill head that produces an undercut, and a drilling table for supporting a facing panel in which the drilled holes with an undercut are to be produced and displaceable in a plane of the drilling table. A trunnion projecting from a rotatable base member and engaging a bearing secured to the drilling table is movable between a first position in which the trunnion axis coincides with the axis of rotation of the base member, and a second position in which the trunnion axis is eccentric to the axis of rotation of the base member to effect swiveling of the drilling plate when the rotatable base is driven rotatably.The device has a mechanism for moving the trunnion between the first and second positions including a lever pivotally mounted on the base member, the trunnion being mounted on the lever, and a piston-cylinder drive secured to the base member for pivoting the lever.Type: GrantFiled: March 11, 1991Date of Patent: November 17, 1992Assignee: fischerwerke Artur Fischer GmbH & Co. KGInventors: Wilfried Weber, Stefan Lind, Herbert Erath
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Patent number: 5143497Abstract: The expansible plug for fixing an element or frame member on solid or hollow building material, has a plug shank (1) having a plurality of expansion discs (3,4) arranged one after the other along the plug shank (1). The expansion discs (3,4) are provided with eccentric bores (12,13) located so that, without the fixing screw (23) inserted, the bores (12,13) of adjacent discs (3,4) are noncoaxial or staggered with respect to one another and overlap one another and so that the overlapping bores (12,13) form a constricted screw hole (15) through the plug shank (1). When a fixing screw (23) is screwed into the expansible plug the expansion discs (3,4) are displaced laterally so that the bores (12,13) in the expansion disks have a coaxial relationship and the expansion disks (3,4) are displaced laterally outwards from the plug shank to secure the expansible plug in a hole in which it is located.Type: GrantFiled: August 26, 1991Date of Patent: September 1, 1992Assignee: Fischerwerke Artur Fischer GmbH & Co. KG.Inventor: Manfred Haage
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Patent number: 5141103Abstract: A storage container for recording media such as magnetic tape cassettes, compact discs and the like comprises a housing and a slider member displaceable in the housing between storage and removal positions. A locking arrangement is provided for locking the slider member in the housing in the storage position of the slider member. The locking arrangement includes a resilient flexible bar and a latch formed at one of opposite ends of the resilient locking bar with another of the opposite ends being secured to the slider member. A side arm projects from the resilient flexible bar and engages with the slider member for displaceably supporting the latch on the slide member. The arrangement includes a press button which is supported on the front portion of the slide member and is pressed against the resilient flexible bar to provide for movement of the latch from its locking position to its unlocking position.Type: GrantFiled: November 28, 1990Date of Patent: August 25, 1992Assignee: fischerwerke Artur Fischer GmbH & Co. KGInventor: Christoph Stephan
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Patent number: 5139146Abstract: A container for magnetic tape cassettes has a housing having a plurality of insertion openings, a plurality of base plates subdividing the housing into a plurality of individual compartments, arresting elements provided on the base plate and engaging in a reel hub of a cassette to prevent their turning, elements for guiding the cassettes and including complementary guides provided on the housing, elements for stressing a cassette in an inserted position and including a spring element arranged on a rear wall of the housing, and a releasable catch element provided on the base plate and holding a cassette in the inserted position.Type: GrantFiled: June 6, 1991Date of Patent: August 18, 1992Assignee: fischerwerke Artur Fischer GmbH & Co. KGInventors: Wilfried Weber, Hans-Peter Heizmann, Eduard Kaupp, Wolfgang Nehl, Hartmut Rothfuss
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Patent number: 5096344Abstract: The drill bit for producing a cylindrical drilled hole, especially in concrete, has a shank and a drilling head at one end of the shank provided with at least one helically extending drilling dust groove. At least two bulb-like shank enlargements (6,7) are provided on the shank (5) arranged in succession axially. Each of the shank enlargements (6,7) has the same maximum diameter and the drilling head has a drilling head diameter which is at least as great as the maximum diameter of the shank enlargements (6,7). Advantageously two drilling dust grooves with semicircular cross sections are provided on the shank displaced from each other radially by about 180.degree. to form a cross member with cutting edges on the drilling dust grooves.Type: GrantFiled: July 26, 1991Date of Patent: March 17, 1992Assignee: Fischerwerke Artur Fischer GmbH & Co., KGInventor: Artur Fischer
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Patent number: 5092717Abstract: The device for producing a drilled hole with an undercut includes a drilling tool having a shank and a drilling head faced with a plurality of diamond chips, a drilling tool-holder structured to hold the drilling tool and a rotatable sleeve having an axial throughgoing passage for the drilling tool and the drilling tool-holder and also having a lateral connecting pipe for a cooling and flushing liquid. So that the drilled hole with the undercut can be made in a single working step using the same drilling tool, the shank of the drilling tool (2) is provided with a stop collar (12) and also a cross-sectionally enlarged portion (17). The shank of the drilling tool (2) tapers uniformly toward the drilling head (11) and also tapers uniformly toward the stop collar (12).Type: GrantFiled: March 21, 1991Date of Patent: March 3, 1992Assignee: Fischerwerke Artur Fischer GmbH & Co. KGInventor: Artur Fischer
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Patent number: 5090848Abstract: The device for producing an undercut drilled hole includes a drilling machine, a drilling tool having a drilling head widening conically towards its front end; an adaptor connecting the drilling tool and the drilling machine so that the drilling tool rotates with the drilling machine; a sleeve fixedly connected to the drilling machine and having a circumferentially collar, the adaptor extending through the sleeve with the drilling tool protruding from the sleeve; a fixed bearing bush structured to receive the sleeve so that the sleeve is pivotable in the bearing bush, the circumferential collar including a first axial end face arranged in linear contact with a wall of the bearing bush; and a resiliently deformable element, especially a rubber ring, arranged between an annular disc member connected to the bearing bush and a second axial end face of the circumferential collar opposite to the first axial end face for axially holding the circumferential collar.Type: GrantFiled: January 23, 1991Date of Patent: February 25, 1992Assignee: fischerwerke Artur Fischer GmbH & Co. KGInventor: Willi Haug
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Patent number: 5085546Abstract: A mounting assembly includes an expansible anchor having a threaded bolt, an expansible sleeve, and a shank member having an internal thread that enables the shank member to be screwed onto the threaded bolt to provide for expansion of the expansible sleeve over the expander body of the threaded bolt. The mounting assembly also includes a mounting tool adapted to be clamped in a drill chuck of an impact drilling machine and the like and having an end portion shaped like a polyhedron for engaging the internal bore of the shank member which internal bore has a diameter that is less than the diameter of the internal thread.The internal bore and the polyhedron end portion has lateral faces and edges such that, when the mounting tool clamped is engaged with the internal bore and the drill operated, the shank member rotates with the mounting tool until the installation is complete.Type: GrantFiled: October 10, 1990Date of Patent: February 4, 1992Assignee: Fischerwerke Artur Fischer GmbH & Co. KGInventor: Artur Fischer
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Patent number: 5083407Abstract: A fixing element for securing a facing panel to a masonry and anchorable in an undercut of a drilled hole formed in the facing panel, has an expansion member with an expander cone, formed at an end thereof and a shank portion extendable beyond the rear surface of the facing panel and projecting into the masonry. Holding elements is formed on the shank portion to reliably fix the shank portion in the masonry, and an expansible sleeve is displaceable over the expander cone for anchoring the fixing element in the undercut of the hole drilled in the facing panel.Type: GrantFiled: January 23, 1991Date of Patent: January 28, 1992Assignee: Fischerwerke Artur Fisher GmbH & Co., KGInventor: Artur Fischer
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Patent number: 5079881Abstract: An injection packer for injecting a synthetic resin into cracks in concrete has an elongate plastic body having a longitudinal injection channel, an injection nipple arranged at the rear end of the plastic body and communicating with the injection channel, and a sealing cuff made of a plastic material which is softer than a material the plastic body is made of, and fitted in a positive inter-engagement manner around the front end of the plastic body.Type: GrantFiled: September 7, 1990Date of Patent: January 14, 1992Assignee: Fischerwerke Artur Fischer GmbH & Co. KGInventors: Manfred Haage, Willi Haug, Dieter Biskop
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Patent number: 5076746Abstract: The fixing element for anchoring in a hole drilled in a concrete part includes a threaded bolt, an expansible body with an expander cone and an expansible sleeve having an internal bore. The expansible sleeve has longitudinal slots extending from its front end and the expansible body is joined to the threaded bolt for expansion in the drilled hole. To ensure that the fixing element can continue to at least partially hold after experiencing a sever excessive stress such as occurs during an earthquake, the internal bore (14) of the expansible sleeve (11) has a first cylindrical portion (14a) in its front end, which has a length corresponding approximately to the length of the expander cone (5) and the diameter of the first cylindrical portion (14a) corresponds to the smallest expander cone diameter.Type: GrantFiled: May 6, 1991Date of Patent: December 31, 1991Assignee: fischerwerke Artur Fischer GmbH & Co KGInventors: Artur Fischer, Wilfried Weber
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Patent number: 5076374Abstract: The drilling device for memory, particularly aerated concrete, includes an impact drilling machine and an impact rotation tool to be clamped in the drilling machine. To prevent the impact-drilling shank jamming in the drill hole as it is withdrawn, and nevertheless to achieve maximum holding power in the masonry, the impact-rotation tool consists of an impact-drilling shank tapered conically toward a tip from a cylindrical middle portion of increased diameter, a carrier bush connected with a circumferential shoulder of the impact-drilling shank and a ram engaging with some play in an internal bore of the carrier bush. A drill bit-like locating means is provided on the ram for engagement in the drilling machine.Type: GrantFiled: October 26, 1990Date of Patent: December 31, 1991Assignee: fischerwerke Artur Fischer GmbH & Co. KGInventors: Manfred Haage, Werner Heinzelmann
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Patent number: 5044451Abstract: A device for forming an undercut in a drill hole includes a drilling tool having a shank receivable in a chuck of a drilling machine and having a convex collar supported on a corresponding concave bearing surface of a bearing element of the device. The bearing element has a bore that communicates the bearing surface with an opening which communicates with a source of a lubricant liquid. The collar has at least one groove for conducting the liquid into the drill hole to the drill bit head of the tool.Type: GrantFiled: June 29, 1990Date of Patent: September 3, 1991Assignee: Fischerwerke Artur Fischer GmbH & Co. KGInventor: Artur Fischer
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Patent number: 5033952Abstract: An injection adapter for introducing a flowable compound into a drilled hole in masonry has a plastic tubular part having an inner thread in the upper end thereof for engaging a threaded end of a bolt of a fixing element anchored in the drilled hole which threaded end projects from the drilled hole. The injection adapter has a lower tapering end having a front annular end face for engaging an adjacent annular end face of a sleeve of the fixing element.Type: GrantFiled: February 9, 1990Date of Patent: July 23, 1991Assignee: Fischerwerke Artur Fischer GmbH & Co. KG.Inventor: Willi Haug
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Patent number: 5032046Abstract: A threaded bolt assembly adapted to be anchored in a drilled hole formed in a concrete part and having an undercut expanding towards a bottom of the drill hole, with a hardening compound mass. The threaded bolt assembly includes a threaded bolt having an internal bore extending from a leading end face of said threaded bolt and having an internal thread, and a plurality of expansible segments formed in a region of the internal bore by a plurality of longitudinally extending slots. The threaded bolt assembly further includes an expander bolt having a threaded portion threadably received within the internal bore of the threaded bolt, an expander cone extending from the threaded portion. A projection extends from an end face of the expander cone.A method for anchoring such a threaded bolt assembly in a hole with an undercut drilled in a concrete part, is also described.Type: GrantFiled: June 29, 1990Date of Patent: July 16, 1991Assignee: fischerwerke Artur Fischer GmbH & Co. Kg.Inventor: Artur Fischer
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Patent number: 5031709Abstract: A drilling apparatus for producing undercut drilled holes and comprising a drill shaft including a bulge portion located between a stop ring mounted on the drill shaft and a drilling head mounted at the free end of the drill shaft, and which narrows towards opposite ends of the drill shaft.Type: GrantFiled: August 28, 1989Date of Patent: July 16, 1991Assignee: fischerwerke Artur Fischer GmbH & Co. KGInventor: Artur Fischer
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Patent number: 5030043Abstract: A driving-in device for fixing an anchor in a hole with an undercut and comprising a drill adapted to be received in a chuck of an impact drilling machine, and a drive-in sleeve-shaped member secured to the drill for joint rotation therewith. The drive-in sleeve-shaped member has at an end thereof remote from the end at which it is secured to the drill, a bolt portion that engages a threaded sleeve member of the anchor to screw it over a threaded portion of an expanding bolt to displace an expansible sleeve over an expander portion of the threaded bolt.Type: GrantFiled: May 3, 1990Date of Patent: July 9, 1991Assignee: Fischerwerke Artur Fischer GmbH & Co. KGInventors: Artur Fischer, Gunter Seibold
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Patent number: 5012922Abstract: A container for receiving a cassette with a tape-like recording medium, and comprising a rectangular housing, a transporting slide member for supporting the cassette and movable along the side wall of the housing for advancing the cassette to a position at which the cassette is removed and a spring supported in the housing for advancing the transporting slide member to the position at which the cassette is removed. A retaining arrangement is provided for retaining the transporting slide member. The retaining arrangement includes a leaf spring secured to the slider member, extending in a direction of movement thereof, and having a free end, a tooth secured at the free end of the leaf spring for engaging the housing to retain the transporting slide member therein, and a finger-actuatable push-button for releasing the transporting slide member upon application of finger pressure to the push-button. A counter-supporting member is secured to a portion of the side wall of the housing.Type: GrantFiled: March 2, 1990Date of Patent: May 7, 1991Assignee: fischerwerke Artur Fischer GmbH & Co. Kg.Inventor: Wolfgang Nehl
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Patent number: 5011015Abstract: A container for storing a magnetic tape cassette or the like includes a housing and a slide. The slide is displaced in the housing from the inserted position to the extended position and vice versa by an automatically coilable spring strip which has a coil portion engaging the slide and an end fastened in the housing. The spring strip, upon winding up, exerts on the rear wall of the slide a spring force.Type: GrantFiled: March 14, 1988Date of Patent: April 30, 1991Assignee: Fischerwerke Artur Fischer GmbH & Co. KGInventors: Manfred Ziegler, Edmund Koerner