Bizarre Patents
User-operated amusement apparatus for kicking the user's buttocks
An apparatus including a user-operated and controlled apparatus for self-infliction of repetitive blows to the user's buttocks by a plurality of elongated arms bearing flexible extensions that rotate under the user's control.
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| Number | Title | Issue Date |
| 5403136 | Threaded fastener especially for orthopaedic purposes The fastener, which is especially adapted for bones, consists of a shaft (2) bearing a thread (1) with variable pitch, a front end (3) and a rear end (4). The thread (1) is present over the entire area of the shaft (2), and in the area of the rear end (4)... | 04/04/1995 |
| 5397356 | Pin for securing a replacement ligament to a bone A pin is provided for securing a replacement ligament inside a tunnel of a receptor bone. The pin includes a body portion having a threaded section for engaging the receptor bone to anchor the pin in the receptor bone. The body portion also includes a tap... | 03/14/1995 |
| 5384939 | Fixing element for holding a mat The fixing element for fixing a mat to a floor part in a vehicle consists of a bottom part anchorable to the floor part to which the mat is to be secured and a top part having a clamping device and securable to the mat via the clamping device. The top par... | 01/31/1995 |
| 5381606 | Aeration devices and methods A bin aeration device includes a skirt mounted to a bin wall by a stem including an exterior surface with a first portion having straight American National Standard pipe threads. A second portion on the exterior surface includes American National Standard... | 01/17/1995 |
| 5356253 | Sheet metal screw The present invention discloses a screw for use with very thin sheet metal. The screw has a head and a shank which has a first and relatively very short tapered section and a second, longer, substantially cylindrical section. The first section attaches to... | 10/18/1994 |
| 5314282 | Composite fastener A composite fastener member, in one form, having integral head and shank portions is defined by a plurality of superimposed composite fiber reinforced sheets spirally wound about a longitudinal axis. A plurality of fastener members, oppositely disposed wi... | 05/24/1994 |
| 5294227 | Self-tapping screw A self-tapping screw has a cutting thread formed by two separate threads (3, 4). An imaginary envelope (5) defines a annular space (5) laterally enclosing the screw shank and has a section (5a) tapering inwardly along an inwardly tapering leading end sect... | 03/15/1994 |
| 5282708 | Self-tapping screw-type masonry anchor A self-tapping, screw-type masonry anchor which can readily be turned into a hole drilled in a masonry structure to secure an object thereto, the installed anchor being highly resistant to pull-out forces. The anchor, which is fabricated of hard metal, in... | 02/01/1994 |
| 5259398 | Method for fixing prosthesis to bones In a screw device (10; 80) for fixing prostheses to bones, the threaded shank (14) comprises a core (32, 34) of overall frusto-conical shape. The screw has a cylindrical neck (12) of diameter equal to or greater than the maximum diameter of the thread. Th... | 11/09/1993 |
| 5252016 | Fixing element for low strength materials A fixing element for connecting materials of relatively low strength includes a unitary, one-piece plastic body. An external thread is formed on the plastic body for compressing and compacting the low strength material in the thread turns of the external ... | 10/12/1993 |
| 5234301 | Hole forming and selftapping screw Hole forming and selftapping screw of up to approximately 6 mm thread diameter for tapping into sheet metal of a thickness of up to approximately 1 mm comprising a head including a formation for receiving a tool, a thread shank and a cylinder member follo... | 08/10/1993 |
| 5226766 | Bone screw with improved threads A bone screw having a helical thread that gradually increases in thickness from the tip to the head of the screw. The thin thread at the tip of the screw can be inserted into a bone with minimal tearing or cracking of the bone. The thicker treads ascendin... | 07/13/1993 |
| 5190426 | Concrete fastener A fastener for securing fixtures to concrete or masonry. The fastener includes a dual-thread first stage for engaging a bore in the concrete and stabilizing and centering the fastener as it taps its way into the bore. A single-thread second stage has a pi... | 03/02/1993 |
| 5188496 | Self-tapping screw-type masonry anchor A self-tapping screw-type masonry anchor which when turned into a hole drilled in a masonry structure to secure an object thereto is then highly resistant to pull-out forces. The anchor is fabricated of a metal whose hardness is such that when it rubs aga... | 02/23/1993 |
| 5131204 | Reinforcing steel connection A sleeveless screw connection between two reinforcing steel elements includes a conical tapped hole in one end of one of the elements, and a conical externally threaded end on the other element. The surface of each thread envelope makes an angle of betwee... | 07/21/1992 |
| 5120171 | Bone screw with improved threads A bone screw having a helical thread that gradually increases in thickness from the tip to the head of the screw. The thin thread at the tip of the screw can be inserted into a bone with minimal tearing or cracking of the bone. The thicker treads ascendin... | 06/09/1992 |
| 5073073 | Self-aligning bolt and a self-aligning nut A self-aligning bolt has an eccentric pilot tip extending forwardly of the externally threaded shank thereof. A self-aligning nut has an eccentric counter-bore formed therein on the side of the seating face and offset from the axis of the internally threa... | 12/17/1991 |
| 5061136 | Masonry screw anchor A masonry screw anchor having two different constant diameter shank portions connected via a taper. Each portion has a set of constant diameter threads and intermediate smaller diameter protrusions with the threads and protrusions on the larger diameter s... | 10/29/1991 |
| 5059077 | Fixing element for low strength materials A screw-in plug provided with a pointed conical thread section (4) and an insertion point (5) has a stop collar (6) adjoining the thread section (4). A head (7) moulded onto the stop collar (6) serves as a bearer of a screwing-in slot (13) and of a moulde... | 10/22/1991 |
| 5044855 | Thread-forming fasteners This invention relates to an improvement of thread-forming fasteners comprising driving heads, shanks, work entering end portions without a thread and continuous rolled type threads on both the said shank and the said work entering end portions, the shank... | 09/03/1991 |
| 4981406 | Fastener screw thread and pilot to avoid cross threading A screw or bolt has a conventional threaded shank and a tapered pilot or lead end for easy entry to a threaded receptacle or nut. A pilot lead extends axially from the end of the shank. In one form, the pilot is cylindrical having an axis that either inte... | 01/01/1991 |
| 4952110 | Anti-cross thread screw A threaded fastener has an eccentric tip with a smooth portion and a threaded portion. The smooth portion when viewed in side elevation defines an edge on a curve with an arcuate slope and the tip threaded portion is coincident with the shank to provide a... | 08/28/1990 |
| 4892429 | Roof anchor and stress plate assembly An anchor and stress plate assembly adapted to secure an insulation layer to the deck of a roof without penetrating the lower surface of the deck which is formed either of relatively soft or hard decking material. The anchor is provided with a flanged hea... | 01/09/1990 |
| 4878794 | Collated screw fasteners A series of drywall screws are nested together and individually seated with a special driving tool after separation from one another. Each screw is hollow and has interior and exterior screw threads. One end of the screw has a hollow flat head and the bod... | 11/07/1989 |
| 4840526 | Gripping device for tensioning screwing elements A gripping device for tensioning a screwing element (2) which, at its free end, has an outer profile matching the inner profile of an engaging member (4). The screwing element (2) has an outer profile with teeth (20) of constant pitch and of constant cros... | 06/20/1989 |
| 4828221 | Valve assembly An improved rotary valve assembly having a valve body, a valve element rotatably disposed in the body and having a first bore which is coaxial with the axis of rotation of the valve element and a shaft member rotatably mounted in the valve body and extend... | 05/09/1989 |
| 4818167 | Tapered screw member having guide means A tapered screw member provided with a tapered external thread or a tapered internal thread, which comprises disposing a guide means somewhat higher than the crest of another tapered thread at a position connecting to the crest of the tapered external thr... | 04/04/1989 |
| 4789288 | Anti-cross threading screw A screw having a tapered and offset tip with a partial thread prevents cross-threading of the screw when inserted into a nut. The offset tip is a section of a conical frustum. The axis of the conical frustum section is offset from the axis of the shank of... | 12/06/1988 |
| 4763456 | Roof anchor and stress plate assembly An anchor and stress plate assembly adapted to secure an insulation layer to the deck of a roof without penetrating the lower surface of the deck which is formed either of relatively soft or hard decking material. The anchor is provided with a flanged hea... | 08/16/1988 |
| 4756653 | Fastening element for securing packing sheets A fastening element for packing sheets comprises a body having a lateral surface; a thread provided on the lateral surface; a head plate situated at an end of the body and having a diameter larger than a largest diameter of the thread; and a recess extend... | 07/12/1988 |
| 4702658 | Apparatus for reducing installation forces and costs in a tapered bolt installation A stacked array comprising at least one or more similar or dissimilar metals or composites and having either a tapered bore or a tapered sleeve. A tapered bolt adapted to be inserted into the tapered bore and having a taper that is different from the tape... | 10/27/1987 |
| 4662806 | Metal lock system and method Apparatus for repairing a casting having a crack therein comprising a metal lock to extend across the crack and a lacing plug to fit in the crack, the metal lock formed as a rigid elongate member having a plurality of lobes formed from adjacent portions t... | 05/05/1987 |
| 4610064 | Device for spreading flanges A device for spreading two flanges (1, 2) mounted in opposite position in a pipe system (3), which device mainly comprises a conical screw element (7) to be inserted into a continuous hole of a flange, said element having an axial opening, in which fits a... | 09/09/1986 |
| 4512699 | Daze fasteners A daze fastener system for connecting two or more structural elements wherein the structural elements and fastener parts have substantially different coefficient of thermal expansion physical property characteristics is employed in this invention. By prov... | 04/23/1985 |
| 4510898 | Reciprocating piston internal combustion engine, preferably of four-cylinder construction A reciprocating piston internal combustion engine equipped with a vibration-damping balancing shaft that is rotatably supported in a bearing housing which in turn is secured at the cylinder crankcase by means of a threaded connection; in order to support ... | 04/16/1985 |
| 4230166 | Skirted nut This invention relates to a nut including a resilient skirt portion generally frusto-conical in shape the wall of which comprises an external circular rib preventing the skirt portion from turning up after a member is fastened against a threaded element b... | 10/28/1980 |
| 4028987 | Self-drilling screws A self-drilling thread-forming screw having a first portion which is screw-threaded and adapted to form a screw-thread in the material within which the screw is to be engaged, a head at one end of the first portion, and at the other end of the first porti... | 06/14/1977 |
| 3937119 | Masonry anchor device A screw type anchor device for securement into masonry structures. A sharp crested helical thread, preferably with tapering crest diameter, is formed along the shank and helical protuberances forming guide means are spaced along the shank between adjacent... | 02/10/1976 |
