Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7421315 | Detection system for power equipment A machine is disclosed having a detection subsystem adapted to detect contact between a person and a specified portion of the machine, and to distinguish that contact from contact with other materials. The detection subsystem imparts an electrical signal to a specif... | 09/02/2008 |
| 7373863 | Power tool safety mechanisms A sensing mechanism (12) for detecting user contact with an active portion (26) of the power tool (10) is provided. In addition, a safety mechanism (14) for preventing prolonged user contact with the active portion (26) of a power ... | 05/20/2008 |
| 7351948 | Safety system and method utilizing multiple laser beams for an industrial machine A method of operating a safety system for an industrial press having a moveable section and a stationary section, the safety system providing a plurality of continuous planar laser beams having a generally constant lateral width, each laser beam being spaced at vary... | 04/01/2008 |
| 7228772 | Brake positioning system A saw is disclosed having a detection system adapted to detect a dangerous condition between a person and a saw blade, and a brake adapted to stop the saw blade in response to detection of the dangerous condition. The saw further includes a brake positioning system ... | 06/12/2007 |
| 7210383 | Detection system for power equipment Woodworking machines including conductive cutters adapted to cut workpieces, and motors adapted to drive the cutters are disclosed. The machines also include a contact detection system adapted to detect contact between a person and the cutter, and to distinguish con... | 05/01/2007 |
| 7197969 | Logic control with test mode for fast-acting safety system Woodworking machines including cutting tools and motors adapted to drive the cutting tools are disclosed. The machines also include a detection system adapted to detect a dangerous condition between the cutting tool and a person, and a reaction system adapted to per... | 04/03/2007 |
| 7194929 | Pole for hand pallet truck A pole for a hand pallet truck that includes a pole bar which is linked to a support for a steerable wheel at its lower end and connected to a loop-shaped handle at the other end. An operating device is disposed within the space defined by the handle. The operating ... | 03/27/2007 |
| 7159562 | Engine control device for construction machine A engine control device for a construction machine of the present invention is configured so that the engine control device comprises a first switch for selecting effectiveness/ineffectiveness of an automatic deceleration control by a controller and a second switch ... | 01/09/2007 |
| 7100483 | Firing subsystem for use in a fast-acting safety system Cutting machines with high-speed safety systems, and firing subsystems used in high-speed safety systems, are disclosed. The cutting machines may include a detection system adapted to detect a dangerous condition between a cutting tool and a person. A reaction syste... | 09/05/2006 |
| 7077039 | Detection system for power equipment A machine is disclosed having a detection subsystem adapted to detect contact between a person and a specified portion of the machine, and to distinguish that contact from contact with other materials. The detection subsystem imparts an electrical signal to a specif... | 07/18/2006 |
| 7000514 | Safety systems for band saws Band saws with high-speed safety systems are disclosed. The band saws include a detection system adapted to detect a dangerous condition between a blade and a person. A reaction system performs a specified action such as stopping the blade upon detection of the dang... | 02/21/2006 |
| 6997090 | Safety systems for power equipment A saw with a safety system is disclosed. The safety system includes a detection system adapted to detect contact between a person and a blade while the blade is moving. The safety system further includes a brake system adapted to engage the blade and to stop the bla... | 02/14/2006 |
| 6964225 | Press A press, especially a precision cutting press, for producing precision cut parts from a metal strip or a preform by means of a tool, which is fixed to a top tool clamping plate and a bottom tool clamping plate, wherein a tappet is allocated to one of the tool clampi... | 11/15/2005 |
| 6900728 | System to detect user entry into a defined danger zone A system and method for detecting user entry into a defined danger zone surrounding a saw blade includes a non-conducting member defining an opening therein for receiving a saw blade. The non-conducting member may comprise, for example, an insert received by an open... | 05/31/2005 |
| 6883999 | Trowel gearbox brake A brake of a concrete finishing trowel responds automatically to the cessation of drive torque delivery to the rotor to actively brake the trowel's drive train, hence inhibiting or preventing frame rotation. The brake preferably takes advantages of inherent characte... | 04/26/2005 |
| 6880440 | Miter saw with improved safety system A miter saw having a base and an arm that pivots toward the base is disclosed. A blade is supported by the arm, and is designed to cut workpieces resting on the base when the arm and blade pivot downward. The saw includes a detection system configured to detect one ... | 04/19/2005 |
| 6826988 | Miter saw with improved safety system A woodworking machine is disclosed having a base, a blade, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system associated with the detection system to cause a predetermined action to take place upon detect... | 12/07/2004 |
| 6824034 | Setting tool A setting tool includes a piston guide (13) displaceably arranged in the housing (11), a bolt guide (12) connection element (16) for fixedly connecting the bolt guide (12) with the piston guide (13) for joint displacement th... | 11/30/2004 |
| 6734581 | Programmable emergency-stop circuit with testing The invention includes a programmable emergency-stop circuit apparatus and method that provides advanced function not found in other systems. The circuit centralizes the control of high voltage motor power into one place, by providing connections for, in its minimum... | 05/11/2004 |
| 6382383 | Safety device for the control elements of a manually operated soil compaction roller The invention relates to a safety device for the manually operated soil compaction roller, comprising an operating lever and an adjusting element coupled to an actuator in order to drive said roller. In case of danger, a safety-control element travels in ... | 05/07/2002 |
| 6274830 | Stop block with embedded proximity switch An improved stop block assembled to NAAMS™ specifications for providing a locating device for a movable member. The stop block has at least one crowned end for positioning to face the movable member and to accurately stop the movable member when the mov... | 08/14/2001 |
| 5842709 | Retractable, swing down step assembly A retractable step assembly (10) includes a step (12) pinned to the lower ends of a pair of swing arms (14, 16) depending downwardly from a bracket (30) for mounting the step assembly to the underside of a vehicle. An electric motor (20) powers the upper ... | 12/01/1998 |
| 5703452 | Safety ensuring apparatus A movable section of a machine is enclosed by a fence and a door. A locking device provided on the door is controlled by a movable section control circuit. In the movable section control circuit, an operating switch outputs either a movable section ON sig... | 12/30/1997 |
| 5583386 | Safety circuit in electrically operated devices The invention discloses a safety circuit for electrically operated devices, which turns on the device in question, based on its position and design, only if handling and posture by the operator is completely correct and proper and the circuit, moreover, i... | 12/10/1996 |
| 5569119 | Implement for ground treatment with a dead-man safety A manually displaceable implement for ground treatment comprising a dead-man safety based on an automatic lowering and blocking of the running wheels (5). A stop (10) is provided on the implement for blockage, against which at least one lowered running wh... | 10/29/1996 |
| 5538490 | Safety bar mechanism and sheet processing device having a safety bar mechanism A safety bar mechanism and sheet processing device having a safety bar mechanism, with which such an accident that the operator's hand is pinched between a table and peripheral devices etc. can be positively avoided whatever direction an external force ex... | 07/23/1996 |
| 5434457 | Foot pedal safety switch and safety circuit A foot pedal safety switch and safety circuit for industrial machines which effectively precludes accidental operation of a machine and improper repetitive cycling of a machine. The foot pedal is completely enclosed within a rigid enclosure having an entr... | 07/18/1995 |
| 5333543 | Ram locking device for a chipless press with statically cushioned and pressure-relievable tension rod In a ram locking device for securing the ram of a chipless forming machine, more particularly a heavy press, wherein the tool-carrying ram, movable up and down in the press frame relative to the bed of the press, is supported by the head of an axially adj... | 08/02/1994 |
| 5307916 | Sensing device A sensing device for monitoring the presence of a tool or other object on an automatic machine comprises a sensing head adapted to be mounted on the machine. The sensing head has a sensing needle mounted on the output shaft of a reversible motor actuated ... | 05/03/1994 |
| 5233231 | Control-safe capacitive switch A palm-button control system provides for machinery control with minimized operator hand pressure by use of capacitive switches and reduced susceptibility to radio frequency interference. The system employs first and second capacitive palm-button switches... | 08/03/1993 |
| 5199113 | Automatically adjusted water closet for handicapped and other family members A toilet elevation adjusting apparatus having an inner box-shaped frame secured within an outer box-shaped frame by channels and wheels to allow vertical displacement of the inner frame while the outer frame is secured to a wall. A toilet is secured to th... | 04/06/1993 |
| 5052255 | Speed brake A radial arm saw assembly (10) includes a fixed position support (12) and a power saw (22) mounted on the support (12) for reciprocating movement relative thereto. The saw (22) includes a blade (28) and a drive mechanism for powering movement of the blade... | 10/01/1991 |
| 5012912 | Safety interlock/latch assembly for a printing press A safety interlock/latch assembly for use on a printing press having at least one safety latch (100) and one guard element (102). At least one lockable pivot device (106, 116) for allowing rotation of the guard element (102) is attached to a first end (10... | 05/07/1991 |
| 4775263 | Arrangement for operating a self-propelled vibratory plate device and method for using said arrangement The invention relates to an arrangement and method for operating a self-propelled vibratory plate device. The vibratory plate of this device receives its vibratory motion from counter-rotating eccentric parts driven by an internal combustion engine. Accor... | 10/04/1988 |
| 4683381 | Controlled-access apparatus for the agricultural food industries In a controlled-access apparatus for agricultural food industries, means is provided within the space located between the rotary tool-holder and the edge of the opening of the vessel of the apparatus for a protection and access-control device which perfor... | 07/28/1987 |
| 4544121 | Support apparatus for medical appliance A support apparatus for a medical appliance includes a support, a lifter for mounting the medical appliance, a counterweight, a wire with one end connected to the lifter and the other end connected to the counterweight, the wire being passed over a first ... | 10/01/1985 |
| 4429627 | Method and apparatus for monitoring a press In a method and an apparatus for safe-guarding a press (1) by monitoring the press motion, use is made of the fact that the force exerted by the press is an almost invariable function of the position of the upper press platen in relation to the lower pres... | 02/07/1984 |
| 4397371 | Loader operator restraint system A front end loader in the form of a skid-steer loader which includes a power operated working implement and control apparatus that has a plurality of operative positions for supplying power to the working implement and at least one neutral position where ... | 08/09/1983 |
| 4391344 | Loader operator restraint An operator restraint member having two ends is pivotally mounted at each end to a skid-steer loader. The restraint member has an engaged position for securing the operator to the operator position during operation of the loader and a disengaged position ... | 07/05/1983 |
| 4388980 | Operator restraint for a loader A front end loader in the form of a skid-steer loader which includes a power operated working implement and control apparatus that has a plurality of operative positions for supplying power to the working implement and at least one neutral position where ... | 06/21/1983 |
