Lens Cover, Scope Hood, Or Shade Patents (Class 42/129)
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Patent number: 12152860Abstract: A dual release gun scope cover system for use with a gun scope having an eye piece end and a front objective lens end. The gun scope cover system has a cylindrical eye piece engagement mount with a lens cover and a cylindrical front end engagement mount with a lens cover. The lens covers are retained in closed position on the respective scope engagement mounts by magnetic attraction to a control action rod extending there between for simultaneous release and gun scope use.Type: GrantFiled: April 3, 2023Date of Patent: November 26, 2024Inventors: David Boston, David Jones
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Patent number: 11859946Abstract: Rifle scopes with a locking feature including a body having an internal movable optical adjustor adapted to shift an image generated by the riflescope, a knob connected to the body for rotation about a knob axis and operably connected to the optical adjustor to position the optical adjustor based on a rotational position of the knob, an indicator skirt rotatably engaged to the body and threadedly engaged to the knob, the indicator skirt being operable to move axially with respect to the knob such that the axial position of the indicator skirt is based on the rotational position of the knob, and the knob including a knob stop surface and the indicator skirt including a skirt stop surface, wherein the knob stop surface and the skirt stop surface are configured to positively contact each other to establish a limit of rotational travel of the knob.Type: GrantFiled: January 10, 2022Date of Patent: January 2, 2024Assignee: Leupold & Stevens, Inc.Inventors: Matthew C. Davis, Todd A. Juenemann
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Patent number: 11852440Abstract: A scope cap assembly for mounting on a scope of a firearm is provided, including a resilient sleeve for mounting to the scope of the firearm; a support body fixed to the resilient sleeve and including a mounting portion; a cap defining an aperture and pivotably mounted to the support body and movable between a closed position and an open position greater than 180 degrees from the closed position; a biasing member for biasing the cap towards the open position; a retaining mechanism for releasably securing the cap at an intermediate position between the closed position and the open position; and a first removable disc configured for placement within the second aperture and defining a annular protrusions for cooperating with annular flanges of the cap to secure the first removable disc in the cap.Type: GrantFiled: January 24, 2023Date of Patent: December 26, 2023Assignee: Bushnell Inc.Inventors: Joe B. Dunning, Aden P. Wright, Monte N. Koenigs
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Patent number: 11774217Abstract: A target sight system includes a base portion with a gun-mounting interface allowing the sight to be firmly fastened to a shooting device. The base also includes a power supply, a target light generator, and a light-passing surface through which the target light passes between the target light generator and a target. The sight system also includes a cover that is detachably removable from the base portion.Type: GrantFiled: August 5, 2022Date of Patent: October 3, 2023Assignee: SIG SAUER, INC.Inventors: Andrew W. York, Drew Essig
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Patent number: 11609068Abstract: A scope cap assembly for mounting on a scope of a firearm is provided, including a resilient sleeve for mounting to the scope of the firearm; a support body fixed to the resilient sleeve and including a mounting portion; a cap defining an aperture and pivotably mounted to the support body and movable between a closed position and an open position greater than 180 degrees from the closed position; a biasing member for biasing the cap towards the open position; a retaining mechanism for releasably securing the cap at an intermediate position between the closed position and the open position; and a first removable disc configured for placement within the second aperture and defining a annular protrusions for cooperating with annular flanges of the cap to secure the first removable disc in the cap.Type: GrantFiled: September 13, 2021Date of Patent: March 21, 2023Assignee: BUSHNELL INC.Inventors: Joe Dunning, Aden P. Wright, Monte N. Koenigs
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Patent number: 11566869Abstract: A protective lens cover assembly is provided. A protective lens cover assembly comprises a body, a first lens cover and a second lens cover. The first and second lens covers are connected to the body. The first lens cover has a first set of securing structures and a second set of securing structures. The second lens cover also has a first set of securing structures and a second set of securing structures. The first set of securing structures of one of the first lens cover and second lens cover is configured to engage the second set of securing structures of the other of the first lens cover and second lens cover.Type: GrantFiled: February 3, 2021Date of Patent: January 31, 2023Assignee: SHELTERED WINGS, INC.Inventors: Michael A. Rosen, Robert Morell, David Hamilton
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Patent number: 11193733Abstract: An optic focusing cover. The optic focusing cover includes a cylindrical body with openings at both ends. A corrective lens is disposed within the cylindrical body such that it covers the entire opening. The corrective lens is capable of further magnifying the telescope. A cap is attached to a first side of the cylindrical body, the cap is capable of going from an open to a closed configuration. A second end of the cylindrical body is configured to be accepted by a telescope.Type: GrantFiled: July 8, 2019Date of Patent: December 7, 2021Inventor: Christopher Vandamia
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Patent number: 9587907Abstract: An apparatus for protecting weapons and weapon accessories. The apparatus has one or more fittings located on a lower portion of a mounting area on the apparatus. The one or more fittings are attached to corresponding mounting sites on an upper portion of a mounting area on a weapon. A frame is affixed to one or more fittings to provide protection for the weapon and weapon accessory in the event of a collision or trauma.Type: GrantFiled: August 21, 2014Date of Patent: March 7, 2017Inventors: Jacob Baker, John Baker
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Publication number: 20140360082Abstract: A sight includes an objective barrel and a dust cap connected to the objective barrel. The dust cap includes a main body, a cover, a first flexible element, and a second flexible element, The cover is connected to the main body. The first flexible element is connected to the main body and includes an inner surface. The second flexible element is disposed in the first flexible element and includes an outer surface wherein the outer surface of the second flexible element contacts the inner surface of the first flexible element.Type: ApplicationFiled: June 6, 2014Publication date: December 11, 2014Applicants: ASIA OPTICAL INTERNATIONAL LTD., SINTAI OPTICAL (SHENZHEN) CO., LTD.Inventors: Tsung-Mou Tsai, Tung-Yao Cheng
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Patent number: 8904697Abstract: Exemplary embodiments are disclosed of scope shields, protectors, guards or devices for shielding and/or guarding gun-mounted scopes. Also disclosed are methods for shielding and/or guarding a gun-mounted scope. In use, exemplary embodiments disclosed herein, for example, may prevent bumping of the scope by another object and the misalignment that might otherwise occur if the scope was bumped by another object.Type: GrantFiled: July 29, 2013Date of Patent: December 9, 2014Assignee: Immovable Optics, LLCInventor: Clayton M. Park
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Publication number: 20140026463Abstract: Exemplary embodiments are disclosed of scope shields, protectors, guards or devices for shielding and/or guarding gun-mounted scopes. Also disclosed are methods for shielding and/or guarding a gun-mounted scope. In use, exemplary embodiments disclosed herein, for example, may prevent bumping of the scope by another object and the misalignment that might otherwise occur if the scope was bumped by another object.Type: ApplicationFiled: July 29, 2013Publication date: January 30, 2014Applicant: Immovable Optics, LLCInventor: Clayton M. Park
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Publication number: 20130055618Abstract: An attachable and length adjustable cover for use with a fiber optic light receptor band associated with an optical gunsight for varying an amount of light which is permitted to enter the fiber optic of the rifle scope and be communicated to the associated reticle display. A body overlays the fiber optic band and includes a plurality of telescopically adjustable sections which overlays at least a corresponding portion of the optic band and which is movable in at least one direction to vary an exposed portion of the band which is available for collecting ambient light.Type: ApplicationFiled: September 4, 2012Publication date: March 7, 2013Applicant: ELITE ARMS INC.Inventor: Scott Eric Watkins
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Patent number: 8240076Abstract: A covering device for an elongated telescopic sight that is mounted on a gun shaft, wherein the elongated telescopic sight has a first end and a second end, the covering device comprising a first pocket having an opening and a coverable end and a second pocket having an opening and a coverable end, wherein the first pocket is coupled to the second pocket by an intermediate member, oriented non-linearly relative to the second pocket, and is facing in at least a substantially opposite direction as the second pocket; wherein the first pocket is coverable upon the first end of the telescopic sight, the intermediate member is wrappable around, underneath or over at least a portion of the gun shaft and the second pocket is coverable upon the second end of the telescopic sight.Type: GrantFiled: August 12, 2008Date of Patent: August 14, 2012Assignee: Carson Optical, Inc.Inventor: Jason C. Carley
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Patent number: 8226251Abstract: An eyecup and optical filter appliance is disclosed and claimed. The appliance can be attached to a vision aid device such as an active or passive night vision device, a telescopic sight for a weapon, or the like. The appliance includes a tubular body, an optical filter mounted within a tubular body end cap, and means for mounting the appliance to the vision-aid device. The tubular body includes a main body and an eyecup sized and shaped to mold closely to that portion of the users face surrounding his eye, so that light is not reflected from the user toward his opponent.Type: GrantFiled: June 20, 2008Date of Patent: July 24, 2012Inventor: Kirk Kreutzig
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Patent number: 8209898Abstract: The instant invention is a sight accessory that attaches to a scope. The double vision blocker attaches with hook and loop fasteners and is further secured by a plurality of “O” rings. The blocker allows the user to sight with both eyes open preventing the occurrence of double vision. This creates an opportunity for the user to be more accurate on a consistent basis. The device is also suitable for use for both right handed and left handed users without any modification. The sight accessory can be attached to archery sights, scopes and any other instrument used for sighting.Type: GrantFiled: June 8, 2009Date of Patent: July 3, 2012Inventor: Timothy Fredrick Long
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Patent number: 8181379Abstract: A composite gun scope full cover for a gun scope secured with a mounting base to a gun comprising a pair of interacting partial substantially identical scope covers; each partial cover including a body of flexible sheet material having a top surface and spaced apart depending walls of a length sufficient to cover about one-half of the length of the scope; an end lens cover at one end of the body to cover either the eye piece end or the distal end of the scope; a strap extending from the opposite end of the body; an opening between the body and the strap and resilient, stretchable material between the end cover and one end of the strap that engages the mounting base during use of the partial cover to cover an end of the scope, whereby one strap of one partial cover is inserted through the opening of the other partial cover so that the opening of the inserted partial cover will fit over an end of the scope to be pulled against the base mount and stretched over an end of the scope opposite to the end covered byType: GrantFiled: April 3, 2009Date of Patent: May 22, 2012Inventor: Edwin F. Brewer
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Patent number: 8142034Abstract: The systems, methods, and devices include a filter unit for removably engaging with a rifle scope. The filter unit includes a cylindrical body having a proximal end and a distal end, with the proximal end adapted for removably engaging with the rifle scope, and a laser filter positioned within the cylindrical body to filter light passing into the rifle scope. A resilient band may be used to hold the filter unit to the rifle scope.Type: GrantFiled: May 22, 2006Date of Patent: March 27, 2012Assignee: Tenebraex CorporationInventor: Peter W. J. Jones
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Patent number: 8024885Abstract: A unique, new and useful structure designed to simply and efficiently cover and protect the lens of a sight, especially a firearm sight such as the hooded models of the EO Tech Holosight type 511, 512, 551, and 552 models. A lens cover comprises a housing with a pair of lens openings, and a pair of lens covers, one for each lens opening. The housing has a recess for receiving the lens covers, and each lens cover is biased toward the recess and is moveable against its bias to a position in which it covers a respective lens opening in the housing. In a preferred embodiment, the recess and the lens covers are configured such that (i) the lens covers can be received and oriented in the recess in a predetermined relation with each other and (ii) the lens covers can be efficiently manipulated when they are not received in the recess in the predetermined relation to cause them to be reoriented and received in the recess in the predetermined relation.Type: GrantFiled: April 5, 2006Date of Patent: September 27, 2011Assignee: GG & G, Inc.Inventors: Thomas A. Newhall, Mark A. Newhall
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Patent number: 8006430Abstract: A universal scope mount includes a housing and a pair of mounting assemblies. The housing has a chamber defined through front and rear ends thereof and having an inner contour conforming to an outer contour of a body of a scope or an accessory to be received therein, a channel downwardly exposed and extending parallel to the chamber and a pair of projections formed along respective opposite sides of the channel. The pair of mounting assemblies is used to respectively secure a front end portion and a rear end portion of the housing to the mount base of the firearm. Each mounting assembly includes a slider to be slidably received in the channel of the housing and supported by the projections of the housing, a mount member to be disposed between the housing and the mount base of the firearm, securing means to securely connect the mount member to the upper attachment surface of the mount base of the firearm, and fastening means to reliably assemble the housing, the slider and the mount member together.Type: GrantFiled: September 15, 2009Date of Patent: August 30, 2011Assignee: Asia Optical Co., Inc.Inventor: Min-hung Wang
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Patent number: 7946072Abstract: A flip-up cover mechanism. An annular body includes two opposite through holes. A displacing member is disposed in the annular body and includes two opposite push portions and a first flange. The push portions respectively protrude from the annular body via the through holes. A cover is rotatably connected to the annular body and includes a second flange detachably engaged with the first flange. A torsion spring is connected between the annular body and the cover. When the second flange is engaged with the first flange, the cover is closed in relation to the annular body and the torsion spring is twisted to provide restoring resilience. When the push portions are respectively pushed through the through holes, the displacing member is elastically deformed to separate the first flange from the second flange and the cover is lifted from the annular body by the restoring resilience provided by the torsion spring.Type: GrantFiled: March 2, 2009Date of Patent: May 24, 2011Assignee: Asia Optical Co., Inc.Inventor: Chen-Shuo Tsai
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Patent number: 7805877Abstract: An eyepiece of a firearm scope includes a spring positioned between a shock mount and an ocular lens, wherein the spring holds the ocular lens a predetermined position from an objective lens of the scope when the spring is in an uncompressed state. During recoil of the firearm, the spring compresses to allow the ocular lens to travel towards the objective lens, thereby increasing an effective eye clearance distance between the ocular lens and a shooter. Following recoil, the spring expands to return the ocular lens to the predetermined position. The spring compresses again during impact of the eyepiece with the shooter's face, thereby partially absorbing the force of the impact and reducing the chance of injury to the shooter.Type: GrantFiled: August 6, 2007Date of Patent: October 5, 2010Assignee: Burris CorporationInventor: John Paul McCarty
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Patent number: 7721480Abstract: A lens cover includes a cap adapted to be pivotably supported on an optical device. A stop may be positioned to interfere with spring-driven movement of the cap and to brake the cap at an intermediate position between closed and open positions thereof, and to allow the cap to be manually moved to the fully open position. An optional detent structure is disclosed for releasably retaining the cap in its open position. A mounting ring assembly of the lens cover may include a first threaded ring member for attachment to the optical device and a second ring member rotatably coupled to the first ring member for positioning a hinge that pivotably attaches the cap to the second ring member. Magnets may be included to retain the cap in the closed position. The mounting ring assembly, the cap, or both may be formed of a metal such as aluminum.Type: GrantFiled: November 10, 2005Date of Patent: May 25, 2010Assignee: Leupold & Stevens, Inc.Inventor: Daniel Campean
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Publication number: 20100095577Abstract: A flip-up cover mechanism. An annular body includes two opposite through holes. A displacing member is disposed in the annular body and includes two opposite push portions and a first flange. The push portions respectively protrude from the annular body via the through holes. A cover is rotatably connected to the annular body and includes a second flange detachably engaged with the first flange. A torsion spring is connected between the annular body and the cover. When the second flange is engaged with the first flange, the cover is closed in relation to the annular body and the torsion spring is twisted to provide restoring resilience. When the push portions are respectively pushed through the through holes, the displacing member is elastically deformed to separate the first flange from the second flange and the cover is lifted from the annular body by the restoring resilience provided by the torsion spring.Type: ApplicationFiled: March 2, 2009Publication date: April 22, 2010Applicant: ASIA OPTICAL CO., INC.Inventor: Chen-Shuo Tsai
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Publication number: 20100077646Abstract: A quick-acquisition optical sight for short-distance aiming or viewing enhanced with an illuminated reticle, e.g., a red dot, and intended for installation on a conventional long-distance viewing apparatus, the combination thereof comprising an integral assembly consisting of a mounting part attachable directly to the tubular scope without any intermediate adapters and a housing with an optical system that is pivotally supported by the mounting part. In spite of the fact that the quick-acquisition sight is approximately 30% smaller and less heavy than the smallest existing sight of this type, it incorporates click-type mechanisms for adjusting the position of the sight optical axis relative to the optical axis of the scope.Type: ApplicationFiled: September 30, 2008Publication date: April 1, 2010Inventors: Leonid Gaber, Dmitry Rocklin, James Munn
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Patent number: 7685760Abstract: A sight apparatus for attachment to a paintball marker having two distinct reticles to assist with the placement accuracy of paintballs. The sight apparatus comprises a body, a first reticle and a second reticle. The first reticle is substantially transparent and includes a diameter line, at least two radius lines, and at least three segment lines extending from each of at least two radius lines. The second reticle is substantially transparent and has a rectangular outline.Type: GrantFiled: April 30, 2007Date of Patent: March 30, 2010Assignee: JT Sports LLCInventor: Terry Neumaster
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Publication number: 20100037506Abstract: A covering device for an elongated telescopic sight that is mounted on a gun shaft, wherein the elongated telescopic sight has a first end and a second end, the covering device comprising a first pocket having an opening and a coverable end and a second pocket having an opening and a coverable end, wherein the first pocket is coupled to the second pocket by an intermediate member, oriented non-linearly relative to the second pocket, and is facing in at least a substantially opposite direction as the second pocket; wherein the first pocket is coverable upon the first end of the telescopic sight, the intermediate member is wrappable around, underneath or over at least a portion of the gun shaft and the second pocket is coverable upon the second end of the telescopic sight.Type: ApplicationFiled: August 12, 2008Publication date: February 18, 2010Inventor: Jason C. Carley
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Patent number: 7647721Abstract: A universal multifunctional cover for a quick-acquisition optical sight in the form of a box-like casing with an open front end, which in the sight-closing position of the cover is located in front of the optical lens, and with a rear end closed with a transparent medium. The cover is provided with a frame that supports an optical filter and has a radial outward projection that can be used as a foresight. The frame is pivotally supported by stretchable resilient members such as rubber strings so that the frame with the foresight and the filter can be switched between the following three positions: a first position in which the frame rests on the box-like casing, a second position in which the frame is installed in front of the optical lens with the foresight projecting upward, and a third position in which the frame is installed in front of the optical lens with the foresight projecting downward and closing the sensor.Type: GrantFiled: October 2, 2008Date of Patent: January 19, 2010Inventors: Leonid Gaber, Dmitry Rocklin, James Munn
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Patent number: 7585080Abstract: A lens cover apparatus comprises a mounting structure, a lens cover, a pivot joint structure, and a spring. The mounting structure is configured for securing the lens cover apparatus to a support structure. The pivot joint structure is coupled between the mounting structure and the lens cover and configured for allowing multi-axis articulation of the lens cover with respect to the mounting structure. The spring is coupled between the pivot joint structure and the lens cover. The spring and the pivot joint structure are jointly configured for causing spring-biased multi-axis articulation of the lens cover between a use position thereof and a stowed position thereof in response to manual initiation of the articulation.Type: GrantFiled: November 15, 2007Date of Patent: September 8, 2009Inventor: Marlin Daniel Ballard
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Publication number: 20090019759Abstract: A telescopic rifle sight shade has a flat body made of flexible and durable material. The device has a strap dimensioned and configured to wrap around a rifle sight and an overhanging shade portion which may extend out from the sight. Fasteners on the device allow it to be fastened to itself. The material of the device may be neoprene, butyl, other polymers, other rubbers, other elastomers, leather, fabrics, composites and combinations thereof.Type: ApplicationFiled: May 22, 2007Publication date: January 22, 2009Inventors: Larry Alan Martin, David Emerick
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Patent number: 7213360Abstract: A scope cover and warming assembly includes a tubular covering that includes an open first end, an open second end and a peripheral wall extending between the first and second ends. The covering has an elongated slot therein generally extending from the first end to the second ends. A heating apparatus is attached to the covering and is adapted for heating an area adjacent to the first and second ends. Each of a pair of heat emitters is positioned adjacent to one of the first and second ends. A power supply is electrically coupled to each of the heat emitters. The covering may be removably positioned on a gun scope so that each of the heat emitters abuts an opposite end of the gun scope.Type: GrantFiled: February 9, 2005Date of Patent: May 8, 2007Inventors: Kevin S. Galloway, David E. Johnson
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Patent number: 6868615Abstract: A telescopic optical sight for aiming a weapon at a target is described. The telescopic optical sight comprises an eyepiece, a first reticule, a second reticule spaced laterally from said first reticule, and at least one object lens. The first and second reticules are between the eyepiece and the object lens, and the second reticule aligns with the first to aim the weapon. The first reticule is the principle focus for the telescopic optical sight.Type: GrantFiled: May 5, 2003Date of Patent: March 22, 2005Inventor: Paul Joseph Malley
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Patent number: 6862833Abstract: An aligning cap is fitted rotationally and coaxially over one of a firearm scope's ends and has pointer-like directional indicator indicia. A set of scope reticulate components—cross-hairs and the like—or a scope alignment reference true to those components—is then brought operably into alignment with the aligning cap's reticulate means and the scope and cap together are re-set into alignment with the firearm bore's center or a firearm alignment so as to eliminate a canted disposition between scope and firearm.Type: GrantFiled: May 21, 2003Date of Patent: March 8, 2005Inventor: Frederick Wilhelm Gurtner
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Patent number: 6811268Abstract: A water-resistant scope shade is provided having a sun shielding barrel which includes a barrel grasping collar, a barrel body, and a pivotal hook affixed to the barrel. The sun shielding barrel is removably attached to a sighting end of a telescopic sight of a rifle or other optical device. The pivotal hood includes lenses of a circular configuration to be fittingly received on a collar of the pivoting hood. A second embodiment has both a pivoting hood housing the lens and a pivoted cover for protecting the lens in the installed position.Type: GrantFiled: July 8, 2002Date of Patent: November 2, 2004Inventor: Christopher M. Watson
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Patent number: 6715227Abstract: A rifle periscope (30) is provided for allowing an indirect line of vision without obstructing use of existing sight assemblies (18, 20) mounted on a rifle (10). The rifle periscope (30) includes a removable mount assembly (32) attached to a barrel (22) of the rifle (22) so as to allow for an unobstructed direct line of vision when using the sight assemblies (18, 20). The removable mount assembly (32) has a first surface (48) and a second surface (52). The first surface (48) has a viewing mirror (50) attached thereto for to providing a first indirect line of vision that is outside of a firing range of the rifle (10). The second surface (52) has a targeting mirror (54) attached thereto for providing a second indirect line of vision that is within a firing range of said rifle (10).Type: GrantFiled: August 1, 2002Date of Patent: April 6, 2004Assignee: Mirror Lite CompanyInventor: Daniel M. Swain
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Patent number: 6691447Abstract: A non-telescoping adjustment mechanism for adjustment of a riflescope or other sighting device includes a core that is rotatable about a central axis of the adjustment mechanism and an adjustment knob, which is rigidly coupled to the core and which extends from a housing of the riflescope to a protrusion distance. Rotating the adjustment knob causes the core to rotate for adjusting an adjustable member within the riflescope. An index slide, threadably coupled to the adjustment knob, reciprocates along the central axis between the adjustment knob and the core in response to rotation of the adjustment knob. A scale, positioned on the adjustment mechanism, provides a visual indication of the degree of adjustment applied to the riflescope through multiple turns of the adjustment knob. The indication is achieved without increasing the protrusion distance of the adjustment knob.Type: GrantFiled: September 17, 2002Date of Patent: February 17, 2004Assignee: Leupold & Stevens, Inc.Inventor: Rodney H. Otteman
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Patent number: 6574900Abstract: A weapon aiming device is disclosed which comprises a circular transparent and colored disk having a hole and a sleeve having a first and second end. The circular disk is configured to be mounted at a first end of the sleeve, and the second end of the sleeve is configured to fit over an eyepiece of a telescopic optical sight.Type: GrantFiled: November 3, 1999Date of Patent: June 10, 2003Inventor: Paul Joseph Malley
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Patent number: 6289625Abstract: A gun scope overlay device for diminishing the parallax affect when using a gun scope. The gun scope overlay device includes a panel. The panel has a front side and a back side. The panel is substantially transparent. The panel has a generally circular shape. The panel has a medial portion having a generally opaque mark thereon. The opaque mark has a generally circular shape. The opaque mark has a hole therein. The hole is positioned in a central portion of the opaque mark. The panel comprises a flexible material. The back side of the panel is adapted for removably securing to a lens. The panel is coupled to the rear lens of a gun scope.Type: GrantFiled: June 23, 2000Date of Patent: September 18, 2001Inventor: Mark G. Phares
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Patent number: 5154532Abstract: The reciprocating pump shaft is joined to a reciprocating motor shaft by the coupling of this invention. The pump shaft is provided with a knob-like end having a chamfered angle between the knob and a reduced diameter section adjacent the knob. A two piece annular collar that's about the chamfered shoulder and the reduced diameter section and the collar is provided with a chamfered shoulder having a slight angular mis-match with the shaft shoulder. A nut draws the pump shaft upwardly against the end of the motor shaft and is tightened to the point where the pre-load between the two shafts is greater than the alternating load imposed by the motor.Type: GrantFiled: May 14, 1990Date of Patent: October 13, 1992Assignee: Graco, Inc.Inventors: Thomas J. Schaefer, Calvin S. Hulburt