Patents by Inventor Walter W. Collins

Walter W. Collins has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7246441
    Abstract: An automatic folding knife having a sear provided on a pivoting blade, and an engagement member, configured for upward movement, for selectively engaging the sear. The engagement member extends generally to the exterior of each side portion of the handle. A spring-biased cable biases the blade towards the extended position, and the engagement member is configured for engaging the sear upon the blade being in the retracted position. The blade is configured to automatically pivot from the retracted position to the extended position upon the engagement member being lifted upwardly, and the engagement member also automatically locks the blade in the extended position. The knife can readily be converted to an assisted opening knife having in significant part the components of the automatic knife.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: July 24, 2007
    Inventor: Walter W. Collins
  • Patent number: 7146736
    Abstract: An assisted opening folding knife having a blade with an engagement surface extending generally radially outwardly with respect to the pivot axis of the blade. A cantilevered leaf spring contacts the engagement surface and immediately urges the blade to the extended position upon the blade pivoting through a predetermined angle from the retracted position. An elongated engagement member is pivotally connected to the handle and configured for pivoting between a blade locking position and an unlocking position. In one embodiment, the cantilevered leaf spring also urges the engagement member towards the blade locking position. The engagement member automatically locks the blade in the extended position, and the cantilevered leaf spring, the blade, and the engagement member all substantially extend in the pivot plane.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: December 12, 2006
    Inventor: Walter W. Collins
  • Patent number: 6951055
    Abstract: A utility knife for receipt of a blade and including a handle and a blade carrier pivotally connected to the handle. A threaded fastener fastens a blade retainer to the blade carrier, and the threaded fastener is preferably configured for engagement by the user's hand to move the blade carrier between the retracted position and the extended position. A locking member automatically locks the blade carrier in an extended position upon the blade carrier being moved to the extended position. An actuator moves the locking member against the force of a spring from the locking position to the unlocking position, the actuator extending from the first side of the handle to the second side of the handle. A storage compartment is configured for receipt of plurality of blades, and a closure member allows selective access to such blades.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: October 4, 2005
    Inventor: Walter W. Collins
  • Patent number: 6684510
    Abstract: A further folding knife which automatically locks upon being moved to the open position. The knife includes a blade having a tang with a ledge portion defined in an upper region of the tang for receipt of a sliding bolt. The bolt is provided for sliding movement within a channel defined in the handle, and the bolt is urged forwardly towards the tang of the blade by a bolt spring, such as a coil spring. A band is connected at one end to the bolt, and the other end of the band is connected to a spool, which is carried for rotation within the handle. The spool can be rotated with respect to the handle to cause a winding of the band thereon, which in turn causes retraction of the bolt, such that the blade can be pivoted out of a locked extended position, towards a retracted position.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: February 3, 2004
    Inventor: Walter W. Collins
  • Patent number: 6397477
    Abstract: Spring-assisted folding knife designs having a coil spring, cable, and spool arrangement for pivoting a blade from a retracted position to an extended position. Activation of the spring system can be accomplished a pushbutton mounted on the side of the knife's handle, or through depression of a locking lever carried on the back side of the handle. Once moved to the extended position, the blade is automatically locked in that position through the pushbutton mechanism in one embodiment, or, in the other embodiment, through a liner lock.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: June 4, 2002
    Inventor: Walter W. Collins
  • Patent number: 6039642
    Abstract: A blade sharpener having a magazine slidably carried within a sleeve. The magazine contains two sets of three sharpening wheels carried for rotation within the magazine, which are positioned in a staggered relationship with respect to one another, such that each set of three sharpening wheels forms two sharpening interfaces. Two channels are defined in the magazine and are generally in alignment with each of the two sharpening interfaces. The magazine is movable with respect to the sleeve, and may be selectively fixed in at least three positions relative thereto with a spring-biased pushbutton. For storage or transport, the magazine is moved into the sleeve such that both sets of the sharpening wheels are housed within the sleeve. The magazine of the blade sharpener is also provided with an elongated sharpening rod which is pivotally connected to the magazine, and which is used to sharpen serrated blades.
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: March 21, 2000
    Inventor: Walter W. Collins
  • Patent number: 5926959
    Abstract: A locking knife and sheath combination which provides for automatic locking of the knife when inserted to the sheath and which allows release of the knife from the sheath by a squeezing of the knife's handle. The handle is provided with a locking lever on each edge thereof which engages with receivers on the sheath. The locking levers are spring-biased outwardly such that insertion of the knife into the sheath causes automatic engagement of the locking levers with the receivers on the sheath. Simultaneous inward squeezing of both of the locking levers, occasioned by the user's grasping of the knife's handle, causes the knife to disengage from the sheath to allow removal of the knife therefrom.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: July 27, 1999
    Inventor: Walter W. Collins
  • Patent number: 5815927
    Abstract: A folding knife having a blade pivot connecting a blade to a handle for pivotal movement between an extended position outside of the blade cavity and a retracted position substantially within the blade cavity. A spring biased plunger having a first end and second end opposite the first end is provided, and the first end of the plunger includes a pivotal connector pivotally connecting the plunger to the handle within the blade cavity. The second end of the plunger is pivotally connected to the blade for orbital movement about the blade pivot as the blade moves between the retracted and extended positions. A pivotable locking member is connected to the handle for selectively locking the blade in the extended position. Further, an engagement portion is provided for opening the blade using a downward motion.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: October 6, 1998
    Inventor: Walter W. Collins
  • Patent number: 5769094
    Abstract: A folding knife having a cantilevered leaf spring member with an engagement tab at the free end thereof. The engagement tab engages with a notch defined in a pivoting blade carrier pivotally connected to the knife handle member. Carried within the blade carrier is an interchangeable blade insert. When the blade is moved to an extended position, it is automatically locked in that position through engagement of the engagement tab with the notch in the blade carrier. Retraction of the blade requires pulling upwardly on ears provided adjacent the engagement tab to remove the engagement tab from the notch, such that the blade can be pivoted into a blade compartment provided in the handle member.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: June 23, 1998
    Inventors: R. B. Jenkins, Jr., Walter W. Collins
  • Patent number: 5657543
    Abstract: An emergency tool for use in breaking glass. The tool includes a handle member having an impact member slidingly carried within a channel therein. A spring is provided for advancing the impact member outwardly from the handle in order to break glass upon the impact member's contact therewith. A trigger lever is provided for compressing the spring and cocking the impact member such that upon activation of the trigger, the impact member advances forward for breaking glass. Also provided is a folding blade extendable from the handle, having a serrated edge for cutting seat belts, and a pry member for prying off objects. A spring actuated locking member is also provided for automatically locking the blade in an extended position.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: August 19, 1997
    Inventor: Walter W. Collins
  • Patent number: 5647130
    Abstract: A locking knife and sheath combination having a knife which is automatically locked to the sheath upon insertion of the knife therein. Laterally extending members of the knife handle contact and engagement member pivotally connected to the front of the sheath upon twisting movement of the handle in order to unlock the knife from the sheath.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: July 15, 1997
    Inventor: Walter W. Collins
  • Patent number: 5581834
    Abstract: A combination knife and tool set device having a handle member in which a blade and tool members are pivotally connected. A swinging lock lever is provided for locking the blade in an extended position through entry of the locking member into the blade cavity and abutment thereof against the end of the blade. Retraction of the blade is enabled by one-handed operation of both the locking lever and the blade. Tool members are provided in a tool member cavity at the other end of the handle and may be pivoted outwardly and locked in a variety of extensions and locked in place by a threaded locking set.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: December 10, 1996
    Inventor: Walter W. Collins
  • Patent number: 5572793
    Abstract: A locking knife and sheath combination having a knife of unitary construction. A flexible engagement tab is provided on the handle of the knife for engaging with a tab receiving opening provided in a front portion of the sheath. Upon engagement of the tab with such opening, the knife is securely retained in the sheath. Removal of the knife from the sheath is accomplished by depression of the tab through the tab opening of the sheath. Sheath clamping means are also provided on the opposite side of the sheath and include a clamping arm which pivots with respect to the rearward surface of the sheath through means of rotation of a thumbwheel adjustment member. Rotation of the adjustment member allows for the clamping arm to selectively clamp the sheath to an article. A clamping device is provided for a folding knife having a thumbwheel adjustment member.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: November 12, 1996
    Inventors: Walter W. Collins, Spencer Frazier
  • Patent number: 5511261
    Abstract: A utility tool having a plurality of elongated channels extending the length of a body member. Each tool is provided with a threaded member for selectively locking the tool in a retracted position, an extended position, or a position in between. A central channel is provided which is of a configuration to accept a sliding knife blade or a tool implement of the same cross sectional configuration as is carried by the outboard channels.
    Type: Grant
    Filed: September 21, 1994
    Date of Patent: April 30, 1996
    Inventor: Walter W. Collins
  • Patent number: 5511311
    Abstract: A knife having a sliding blade which may slide from a retracted position to an extended position. A locking member is pivotally connected to the blade and travels with the blade as the blade moves within a handle. A finger on the locking member engages with a recess to selectively lock the blade within the handle. By rocking the locking member forward, against the pressure of a spring, the blade is pushed outwardly from the handle until the finger automatically seats in an extension notch provided in the handle. Retraction of the knife is accomplished by rocking the locking member forward and pulling rearwardly thereon to force the blade back into the handle. A sheath for the knife engages the locking member to automatically lock the knife within the sheath upon insertion into the sheath. Upon extraction of the knife from the sheath, the blade is automatically extended.
    Type: Grant
    Filed: January 12, 1994
    Date of Patent: April 30, 1996
    Inventor: Walter W. Collins
  • Patent number: 5437101
    Abstract: A folding knife having a blade and a longitudinally extending liner. Pivotally connected to the liner is a blade holder receiver, or shell, which receives the liner when the blade is in a retracted position, to cover and retain the blade within the liner. The liner is also received by the shell when the blade is in the extended position, and through cooperation of the shell with the blade and the liner, the blade can be locked in its extended position. The knife may be opened and closed using one hand, and a sharpening device is provided for attachment to the liner and shell for sharpening the blade.
    Type: Grant
    Filed: April 6, 1994
    Date of Patent: August 1, 1995
    Inventor: Walter W. Collins
  • Patent number: D531003
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: October 31, 2006
    Inventor: Walter W. Collins
  • Patent number: D566221
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: April 8, 2008
    Assignee: Marble's Gun Sights, Inc.
    Inventor: Walter W. Collins
  • Patent number: D360013
    Type: Grant
    Filed: August 12, 1993
    Date of Patent: July 4, 1995
    Inventor: Walter W. Collins
  • Patent number: D425390
    Type: Grant
    Filed: January 21, 1998
    Date of Patent: May 23, 2000
    Inventor: Walter W. Collins