Guard Patents (Class 83/860)
  • Patent number: 5181447
    Abstract: An adjustable protecting guard apparatus for a table saw having a guard positionable over the saw blade. The adjustable protection guard apparatus has a telescoping arm extending from one end of the saw table which supports a guard superstructure. A hinged connection on an edge of the guard superstructure permits the guard superstructure and the attached guard to pivot up and away from the saw blade. A control module simultaneously deactivates the motor rotating the saw blade with the pivoting of the guard superstructure. The control module has a multi-position key switch having a by-pass position permitting pivoting of the guard without de-energizing the motor. This permits difficult cuts to be made which would not be feasible with the guard in place. An anti-kickback pawl is also provided within the guard and prevents the saw from rejecting a workpiece in a direction opposite to its feed direction.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: January 26, 1993
    Inventor: Timothy Hewitt
  • Patent number: 5158001
    Abstract: A power table tool having an outlet port positioned relative to the cutting member of the tool so that the dust and other debris generated by the cutting member can be removed from the interior of the tool assembly through an exhaust system. A guard member is provided for the outlet port to prevent insertion of extraneous matter into the interior of the tool as well as to protect the outlet from clogging as a result of the removal of the sawdust and other debris from the interior. The guard member is structured in a manner such that the area of the openings presented in the guard member is greater than about 100% of the area of the outlet port itself. The port is specifically aligned relative to the cutting member in order to enhance the removal of the sawdust and debris from the interior of the tool.
    Type: Grant
    Filed: August 9, 1991
    Date of Patent: October 27, 1992
    Assignee: Skil Corporation
    Inventors: Patrick J. Udelhofen, Gary Polk
  • Patent number: 5152208
    Abstract: A trimming apparatus for edge trimming books including a trimmer knife assembly and a conveying apparatus for conveying the books along a path of movement into aligned relationship with the trimmer knife assembly. The conveying apparatus includes a pair of horizontally extending endless conveyor chains positioned in parallel on adjacent sides of the path of movement and including outwardly extending pusher members for engaging longitudinal edges of the books and moving them along the path of movement. A pair of vertically extending guide members are positioned laterally outwardly of the endless chains for engaging the ends of the books and moving them into proper lateral alignment with the path of movement.
    Type: Grant
    Filed: August 12, 1991
    Date of Patent: October 6, 1992
    Assignee: K. S. Macey Machine Company, Inc.
    Inventors: Rudolph H. Ruetschle, Philip A. Yakovac
  • Patent number: 5117880
    Abstract: A bench type router/shaper which includes (i) a spindle drive pack which incorporates the motor and the spindle into a unitary package so as to establish and maintain a spacial relationship between the motor and the spindle, (ii) a semi-elastic drive belt encompassing the spindle and drive shaft which has a modulus of elasticity effective for providing effective power transmission while permitting removal and replacement of the drive belt without repositioning of the spindle and/or the drive shaft, (iii) a spindle adjustment mechanism for repositioning the longitudinal position of the spindle and thereby the depth of the cutter which includes a rotatable bell crank, a spindle in communication with the first extremity of the bell crank for linear movement of the spindle based upon rotational movement of the bell crank, and a rotatable handle in communication with the second extremity of the bell crank for producing rotation of the bell crank based upon rotation of the handle and (iv) a protective shield over t
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: June 2, 1992
    Assignee: Delta International Machinery Corporation
    Inventors: Kenneth Kapton, Charles J. Baird
  • Patent number: 5090288
    Abstract: An enclosure for housing and operating liquid jet cutters includes concrete, U-shaped upside down positioned modules interconnected where needed and possibly having one end (or both) closed by concrete front plates that permitted the passage of work pieces, while confining spray water as much as possible to the interior of the module. The concrete material resists the cutting effect of a jet that has gone astray.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: February 25, 1992
    Inventor: Helmut Pelzer
  • Patent number: 5075976
    Abstract: A hand held power tool, such as a circular saw, having a saw blade, grinding wheel or other tool disc and having a moveable guard member protectively covering a portion of the working surface of the tool disc, is provided with a guard retainer. The guard retainer comprises a retaining latch mounted to the tool for movement to a latching position to releasably hold the moveable guard member in a retracted position during operation of the power tool. Latch operating means are operably linked to the retaining latch to hold the retaining latch in the latching position against a biasing force. In the latching position a surface of the retaining latch engages a latch stop of the moveable guard member.
    Type: Grant
    Filed: February 5, 1991
    Date of Patent: December 31, 1991
    Inventor: Peter W. Young
  • Patent number: 5024130
    Abstract: Apparatus (10) for repeatedly severing rubber and plastic material (T) at selected locations along a length thereof including a frame (15), an arbor (41) mounted on the frame carrying a knife blade (50) for rotation in a circular path, a guide for supporting the material to be severed in the path of rotation of the knife blade, a rotary actuator (56) for selectively intermittently driving the arbor for instituting rotation of the knife blade, and a cylinder assembly (90) for supplementing the driving of the arbor and for braking the arbor to a stop after the knife blade has severed the material.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: June 18, 1991
    Assignee: Extrusion Services, Inc.
    Inventor: Donald F. Hays, Jr.
  • Patent number: 4949606
    Abstract: An apparatus for severing data-bearing tapes which are dispensed by a machine, which apparatus comprises an electric motor for driving a double-edged helical rotary cutter for cooperating with a spring-loaded stationary cutter, comprises an angle-section carrier, which is formed on the outside of one leg of said carrier with a concave recess extending along said one leg and receiving said rotary cutter, whereas the second leg of the carrier constitutes a bottom for mounting the motor, which is disposed in the spaced defined between the two legs, and the carrier is adapted to be cut to a length which matches the width of the tape to be severed.
    Type: Grant
    Filed: November 22, 1988
    Date of Patent: August 21, 1990
    Assignee: Hengstler GmbH
    Inventor: Horst Pfeiffer
  • Patent number: 4938111
    Abstract: The disclosure herein describes an anti-kickback device for use in a wood ocessing machine. The invention is concerned with mounting, upstream of an arrangement of circular saws, a series of fingers pivotably mounted on a shaft mounted transversely of the frame. Each finger is characterized by a curved edge, facing the lumber passing by, on which is mounted a series of peripherally spaced lumber-engaging pointed elements, each element defining a different angle with respect to the pivot axis of its shaft. Each lumber-engaging element consists of a support which is removably mounted to the curved edge and a blade, preferably made of carbide material, fixed to this support.
    Type: Grant
    Filed: December 30, 1988
    Date of Patent: July 3, 1990
    Assignee: Institut de Recherche en Sante et en Securite du Travail du Quebec
    Inventor: Serge Masse
  • Patent number: 4921024
    Abstract: A method and apparatus to fell a tree is disclosed. A vehicle mountable felling head includes a circular saw mounted to the felling head. A guard overlays the circular saw as a safety measure. The guard has a first portion which is fixed. The fixed portion of the guard has an opening exposing a first arcuate portion of the saw. The guard also has a second, movable portion which overlays a second arcuate portion of the circular saw. The second portion of the guard may be raised to expose a second arcuate portion of the circular saw to cut a slot in one side of a tree with the cut being completed by the first arcuate portion thereby allowing a tree greater in diameter than the radius of the circular saw to be severed.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: May 1, 1990
    Assignee: Blount, Inc.
    Inventors: Ronald W. Wiemeri, James N. Mitchell
  • Patent number: 4875398
    Abstract: A retractable dust control hood for a rotary table saw includes a generally hollow box member which is supported for movement between a working position directly over the saw blade and a retracted position substantially above the saw blade to permit ease of handling workpieces with respect to the saw and a saw support table surface. The hood is supported from a member disposed above the table surface by parallelogram linkage and a counterbalance mechanism including a rod extending between one set of parallelogram link members and a second set of parallelogram link members. A coil spring is disposed around the rod and acts to move the parallelogram link members relative to each other to counterbalance the weight of the hood. The hood includes a transparent window and a lamp for illuminating the interior space of the hood for ease of viewing the workpiece during operation of the saw.
    Type: Grant
    Filed: January 15, 1988
    Date of Patent: October 24, 1989
    Assignee: Atlantic Richfield Company
    Inventors: James M. Taylor, Gary M. Karner
  • Patent number: 4735245
    Abstract: A worktable has a table top with a slot for reception of a saw blade of a hand-held circular saw when mounted below the table top. Two rip fences mounted on the table top are separately slidable in parallel adjusting slots for adjusting independently the position of each fence. A hole in the table top adjacent the middle of the saw blade slot accommodates a cutting tool of a portable router when mounted below the table top. A router guard may be pivotally attached to a raised support structure between the rip fences. A riving knife is adjustably mounted in alignment with the saw blade slot. A saw blade guard is pivotally mounted on the riving knife.
    Type: Grant
    Filed: September 30, 1986
    Date of Patent: April 5, 1988
    Assignee: Black & Decker Inc.
    Inventor: Alan W. Cox
  • Patent number: 4660448
    Abstract: The sound produced by the movement of the teeth of an idling circular saw or band saw blade in air is substantially reduced by exposing the blade to a radiation impedance which is effectively imaginary, thereby subjecting a preselected portion of such sound to propagation cut-off. Propagation cut-off is achieved by providing a cover including a pair of closely spaced parallel acoustically hard-wall plates positionable on both sides of the blade. Preferably the plates are spaced apart by a distance less than 21 millimeters, and extend beyond the tips of the teeth by a distance several times the space between the plates. Portions of the plates may be moveable to expose the teeth during the cutting operation.
    Type: Grant
    Filed: June 30, 1986
    Date of Patent: April 28, 1987
    Inventor: David A. Bies
  • Patent number: 4553463
    Abstract: A chain saw mounting assembly wherein a chain saw is pivotally mounted at the motor housing end, on a support frame, for pivotal movement in the cutting plane of the saw blade. A throttle actuator on the assembly regulates the speed of the cutting chain between idling speed, when the saw is in its inoperative pivoted position, and an accelerated cutting speed when the saw is in its pivoted operating position. The device is adaptable for mounting on a workpiece supporting table.
    Type: Grant
    Filed: July 8, 1983
    Date of Patent: November 19, 1985
    Inventor: Richard C. Engel
  • Patent number: 4520703
    Abstract: An electromotively driven household slicing machine for food, includes a main housing, a cutting tool for cutting food, an integral electromotive drive module for driving the cutting tool, the drive module having its own housing and being lockable to and easily detachable from the main housing, and a device disposed on the main housing for centering and connecting the cutting tool to the drive module in an operating position.
    Type: Grant
    Filed: May 18, 1983
    Date of Patent: June 4, 1985
    Assignee: BOSCH-SIEMENS HAUSGERAETE GmbH
    Inventor: Max Speckhart
  • Patent number: 4467686
    Abstract: The invention relates to a device for guarding the blade of an orientable circular saw or like tool, already provided with an upper guard constituted by a sheath element enveloping the upper part of the blade, said device further comprising a piece of rigid transparent material laterally and frontally enveloping, at least transversely with respect to the plane of the saw blade, that portion thereof directed towards the sawyer, and comprising side and front walls inclined from the outside towards said tool and from bottom to top, means being provided for fixing said piece of transparent material on said upper guard.
    Type: Grant
    Filed: September 6, 1983
    Date of Patent: August 28, 1984
    Assignee: Excor, Inc.
    Inventor: Stoddard H. Pyle
  • Patent number: 4365446
    Abstract: A guard device for a grinding wheel in a grinding machine comprises a side guard plate pivotably mounted upon a guard body for covering one side face of the grinding wheel. A front cover member is slidably mounted upon the top portion of the guard body for covering the upper front portion of the grinding wheel. A latch member is mounted on the front cover member to be engaged with a saw-toothed member so as to restrict movement of the front cover member away from the periphery of the grinding wheel but to allow movement of the front cover member toward the periphery of the grinding wheel. A locking member is pivotably mounted on the top of the guard body to lock the side guard plate in a closed state. When the locking member is pivoted to be disengaged from the side guard plate, the saw-toothed member is also disengaged from the latch member.
    Type: Grant
    Filed: January 26, 1981
    Date of Patent: December 28, 1982
    Assignee: Toyoda Koki Kabushiki Kaisha
    Inventors: Kenichi Munekata, Yasuo Suzuki, Norio Ohta
  • Patent number: 4342243
    Abstract: A chain saw stand with means to anchor a chain saw on a top surface thereof with the chain saw blade extending in front of the stand. A pair of pivotally mounted levers are provided which are connected by resilient connecting means. The top lever is disposed generally parallel with and slightly above the chain saw blade and is actuated by the log to be cut by the chain saw. Upon pressure from the log on the top lever, a second lever is pivoted to actuate the chain saw throttle trigger. The resilient connection between the levers permits the lever actuated by the log to continue pivoting until the cutting operation is complete.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: August 3, 1982
    Inventor: Kendall Porritt
  • Patent number: 4147192
    Abstract: A machine tool for machining workpieces formed of wood, synthetic plastic materials and the like is disclosed, including a transport device mounted on a frame for transporting the workpiece relative to at least one laterally arranged workpiece, and a sound damping cover unit arranged laterally of the tool for partially surrounding the round radiating region of the tool or the workpiece, characterized in that the sound damping cover unit includes a plurality of pivotally connected sound damping members that are displaceable between retracted position and extended positions above and/or below the plane of movement of the workpiece. One end of the damping cover unit is connected with a supporting frame that contains a receiving space for receiving the damping cover unit when in the retracted position.
    Type: Grant
    Filed: March 21, 1977
    Date of Patent: April 3, 1979
    Assignee: Fa. Franz Torwegge
    Inventors: Helmut Torwegge, Rolf Steckstor
  • Patent number: 4095499
    Abstract: In an electrically operable household appliance of the kind in which a detachable accessory, such as a vegetable cutter, is seated on the top of a base and includes a casing which contains working elements adapted to be coupled to the output shaft of an electric motor which is housed in the base and is controlled by a switch which is operable by a key situated in the top part of the base and is actuated by a push-button mounted on the accessory, the casing of the accessory is fixed to the base by at least one fastener comprising a hook which is articulated on the casing and has a hook portion arranged to come into engagement with the base, and the push-button is mounted on the hook.
    Type: Grant
    Filed: February 1, 1977
    Date of Patent: June 20, 1978
    Assignee: Moulinex, Societe Anonyme
    Inventor: Edouard Pierre Julien Ades
  • Patent number: 4043237
    Abstract: A preferably transparent awareness guard of flat plate form is attached to the conventional upper saw guard of a radial arm saw or the like in such a manner that the awareness guard can be raised and lowered relative to the work and saw blade and can also be tilted through a rather wide angular range and securely locked in various adjusted positions. The guard extends forwardly of the saw blade and on opposite sides thereof so that, when the sawyer moves material in front of the saw blade to reposition his work, his arm will engage the awareness guard before contacting the saw blade.
    Type: Grant
    Filed: November 9, 1976
    Date of Patent: August 23, 1977
    Assignee: Wayne R. Roberts
    Inventor: Stoddard H. Pyle
  • Patent number: 4022093
    Abstract: An opening and closing mechanism for the casing of a machine, especially a tobacco cutting machine is provided, having a pair of meshing gears mounted on one machine part, which by way of a link-mechanism are adapted to rotate when the casing is opened. A shock absorber is mounted between the gears to enable the opening movement to have a first phase which is relatively unimpeded and a second phase is damped.
    Type: Grant
    Filed: April 6, 1976
    Date of Patent: May 10, 1977
    Assignee: AMF Incorporated
    Inventor: Eric Thomas Ray
  • Patent number: 4018119
    Abstract: The invention comprises a roller having circumferentially extending slits through which extend blades having an outerwardly facing cutting surface. The blades are detachably mounted from a retractable bar whereby the cutting surface extends beyond the roller or is retracted below the outer surface of the roller. A pivoted protective cover assembly fits adjacent to the slitted rollers and retracts the blades when the cover is lifted away from the slitted roller. Means are provided to position the slitted roller laterally with respect to the film to be slitted.
    Type: Grant
    Filed: May 4, 1976
    Date of Patent: April 19, 1977
    Assignee: The Dow Chemical Company
    Inventor: Forrest R. Lennox
  • Patent number: 3939749
    Abstract: A band saw which has a displaceable guard rail that covers the saw blade in the cutting region thereof above the feed table and is adapted to be displaced upward in a direction parallel to the saw blade and away from the feed table to the height necessary to allow passage of the stock that is being cut. The band saw includes apparatus for raising the guard rail the necessary height in response to exerting pressure by the stock against the guard rail in the direction of cutting, and the apparatus will then maintain the guard rail at a height conforming to the contour of the stock as the latter is passed through the saw blade. Other apparatus provides smooth movement of the guard rail during cutting operations and provides for securing of the guard rail when the band saw is not in operation.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: February 24, 1976
    Assignee: Bizerba-Werke, Wilhelm Kraut KG
    Inventors: Ernst Muller, Alois Butz