Stored Energy Furnishes Drive In One Direction Patents (Class 83/752)
  • Patent number: 7219587
    Abstract: A hand-guided power jigsaw (10) with a jigsaw blade (33) which can be detachably clamped between the free ends of two essentially parallel arms (122, 222) preferably comprised of a U-shaped frame (22), in particular comprised of a tube, and which can be driven, in particular in a reciprocating manner, by a motor (11) integrated into the jigsaw (10), wherein a laterally protruding handle (13) with a switch button (15) of an on/off switch is disposed at the free end of one of the arms (221, 222), can be manufactured as lightweight, compact, and inexpensive because the lower arm (122) carries the motor (11) and transmission mechanism (114, 115, 116, 119, 67) for moving the saw blade (33) back and forth, particularly in a base housing (12), wherein a motor shaft (1103) with a crankshaft (116) is coupled parallel to the arm (221) and is coupled by means of a connecting rod (67) to an elastic support (51, 57) in order to clamp the jigsaw blade (33) in place.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: May 22, 2007
    Assignee: Robert Bosch GmbH
    Inventors: Monika Staebler, legal representative, Alfred Frech, Juergen Wiker, Uwe Engelfried, Siegried Keusch, Manfred-Otto Staebler, deceased
  • Patent number: 5911807
    Abstract: Improvements are provided to improve an apparatus and method for processing a substantially constant velocity flow of a web of material, including a cutting mechanism and a web accumulator upstream of the cutter. The improvements include stopping the web by a side surface of the movable blade and configuring the accumulator dimensions and cutting speed to cause an appropriate level of force between the upstream severed end of the web and the blade. Several features achieve a low cutting time and modify cutting force to cut web regions with different characteristics, such as for cutting through splices. A low inertia rotary solenoid accelerates a blade through the web and against a resilient stop. The blade bounces off of the stop to its spring-biased home position. A permanent magnet or electromagnet holds the blade in the home position as solenoid current develops. These features result in reduced noise and shorter cutting time, thereby allowing an increase in web speed.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: June 15, 1999
    Assignee: Markem Corporation
    Inventors: Jeffrey B. Brooks, Jason W. Dean, David A. Kearney, Jonathan P. Oakes
  • Patent number: 4827820
    Abstract: A paper web cut-off device, comprising a frame and a blade member mounted on the frame. The blade member is disposed to execute cutting of the paper web, with an actuator being provided for producing, on the blade member, the force required for cutting the paper web. The actuator for producing the required force for cutting of the paper web, is a spring member in which cutting energy is stored. At least one cocking or loading member is provided, which is disposed to cock or load the spring member.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: May 9, 1989
    Assignee: Oy Wartsila AB
    Inventor: Jorma Kinnunen
  • Patent number: 4674381
    Abstract: The scroll-saw disclosed is constructed so as to make the task of clamping and un-clamping the saw-blade very simple and very quick. The quick-change facility makes it possible for a craftsman to contemplate cutting intricate designs having myriads of internal shapes. The electric motor of the scroll-saw is connected to the blade by means of a clutch. The clutch is operated by a foot-pedal. The blade is kept in constant tension by a spring. The scroll-saw includes a shoe, which is guided from up/down movement--when up, the shoe is clear of the blade--when down, the shoe comes into contact with the blade, and allows the blade to be de-tensioned. Thus, the blade can be un-clamped, and moved to the next internal shape to be cut, while the vertical position of the blade is controlled by the shoe. The movement of the shoe also is controlled by the foot-pedal.
    Type: Grant
    Filed: May 7, 1986
    Date of Patent: June 23, 1987
    Inventor: Gino Cadorin
  • Patent number: 4603614
    Abstract: The saw is of the type comprising a blade one of whose ends is firmly fixed to a plate capable of vibrating under the effect of an electro-magnet fed with AC current.In accordance with the invention, the vibrating plate (3) is provided with at least one inertia mass (15).The saw may be used by fixing the blade (5) only to the vibrating plate (3), by one of its ends, the other end remaining free.
    Type: Grant
    Filed: May 22, 1984
    Date of Patent: August 5, 1986
    Inventor: Marcel Charonnat
  • Patent number: 4072075
    Abstract: Apparatus for cutting a circular cake into a number of equal, segmental pieces consists of a series of superposed horizontal band cutters arranged to intersect a central axis at equal horizontal angles, the cutters being arranged over a vertically movable, cake-supporting table, which is provided with grooves, which are in alignment with the cutters so that when the table is raised, the cutters subdivide the cake into equal pieces and then sink down into the grooves in the table to permit the cake to be removed from the table by a scoop or the like.
    Type: Grant
    Filed: April 28, 1976
    Date of Patent: February 7, 1978
    Inventor: Norio Ezaki
  • Patent number: 4015499
    Abstract: A device for mounting on a machine to allow the machine to be used as a saw comprises a member for securing to the machine. A tension spring is connected to one extremity of said member, the other end of the tension spring connected to one end of a saw blade or wire. The device comprises also means connected to the other end of the saw blade or wire and for connection to a spindle of a motor of a machine and for converting rotary motion of the spindle to reciprocating rectilinear motion and imparting the reciprocating rectilinear motion to the saw blade or wire.
    Type: Grant
    Filed: November 3, 1975
    Date of Patent: April 5, 1977
    Inventor: Jacques Arthaud
  • Patent number: 3954036
    Abstract: A combination band saw, scroll saw and jigsaw having multiple blades driven by a common power source through a system of pulleys and belts, the jigsaw and scroll saw of which are activated by means of a belt-activated drive rod and piston rod system. The band saw is carried by a series of pulleys and the combination saw may be operated with all three blades simultaneously in operable position, or, in the alternative, each blade may be activated individually.
    Type: Grant
    Filed: June 13, 1975
    Date of Patent: May 4, 1976
    Assignee: James L. Brown
    Inventor: Otto Mathias Andreas Bech