Leaf Spring Patents (Class 29/230)
  • Patent number: 11040590
    Abstract: A method and apparatus for lowering the height of a wheeled vehicle for cargo height constraints during transportation. The rear leaf spring shackle on each side of the vehicle is connected to a sliding frame mount. In the transport configuration, fasteners are removed from the sliding frame mount, and the mount slides forward, rotating the rear leaf spring shackle from a near vertical to a near horizontal position, effectively lowering the height of the vehicle. To return the vehicle to the ride configuration, a screw jack member is attached to the sliding frame mount and a rear attachment point on the vehicle, pulling the sliding frame mount back, aligning attachment points of the mount with the frame member in the original position. The fasteners are reinstalled to lock the sliding frame mount into the ride configuration.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: June 22, 2021
    Assignee: Battelle Memorial Institute
    Inventors: Jerry L. Durham, Gaymon M. Davis, Kurt R. Ramsey, Mark J. Soper, Michael Perry, Arthur A. Horinek, Kevin A. Chilcote
  • Patent number: 8151422
    Abstract: The vane assembly has mating vane support and vane ring, the vane ring having a plurality of annularly interspaced radial loading elements which, when the vane ring is assembled to the vane support, are in a resiliently flexed state and exert corresponding annularly interspaced and outward-oriented radial loads against the vane support, thereby restraining relative radial movement between the vane ring and the vane support during operation of the gas turbine engine. The method includes flexing each of the radial loading elements into the resiliently flexed state simultaneously by sliding the radial loading elements against corresponding lead-in tapers. This can be achieved using a guide tool which includes a plurality of segments bearing the lead-in tapers and which is previously assembled to the vane support.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: April 10, 2012
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Eric Durocher, Anca Mateescu
  • Patent number: 8112856
    Abstract: A clamp of an anti-vibration spring includes a pipe body and a sheathing element fixed to an end the pipe body. Another end of the pipe body is fixed to a covering element. The sheathing element is passed through the external periphery of the pipe body. The pipe body includes a screw rod screwed at the moving element, and an end of the screw rod is protruded from an end of the covering element and fixed at a driving element. A connecting element between the sheathing element and the moving element positions the sheathing element and the moving element. Each sheathing element has a connecting portion including a transversal slot, two clamping disc, and an insert portion on the clamping disc connected to the transversal slot and fixed by a positioning element. By turning the driving element, the anti-vibration spring is compressed or released between the two clamping discs.
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: February 14, 2012
    Assignee: Yakita Metal Industry Co., Ltd.
    Inventor: Chia Hao Huang
  • Publication number: 20070175009
    Abstract: The present invention relates to a method of producing cooling fluid discharge orifices in the wall (171) of a part manufactured by the technique of lost wax casting in which a pattern of the part is produced in a wax mold, the orifices having a first portion (110E) emerging at the external surface (171ext) of the wall. The method consists in making cavities in the wax pattern that correspond to the first portions (110E) of said orifices of the part. Thus it is possible to produce cooling air discharge orifices without sharp edges.
    Type: Application
    Filed: January 29, 2007
    Publication date: August 2, 2007
    Applicant: SNECMA
    Inventors: Thierry Henri, Raymond Alaux, Patrick Emilien, Paul, Emile Huchin, Patrice Jean-Marc Rosset, Boris Soulalioux
  • Patent number: 6470572
    Abstract: A method and apparatus for making a shaped-spring assembly. The method and apparatus utilizes a spring forming apparatus which facilitates the forming of shaped springs without adversely effecting the characteristics of the spring, and a magazine arrangement which stores and loads shaped springs, while maintaining the shape of the springs. The magazine arrangement further permits the storage of a plurality of the shaped springs without fatiguing a leading edge of the spring. With the apparatus and method of the present invention, it is possible to load empty shaped spring cavities at a select location, such as at a field site, and also have a steady supply of shaped springs available for quick replacement. The forming apparatus is designed so as to easily cooperate and/or be mounted onto the magazine arrangement so as to facilitate the transfer of shape springs which are shaped by the forming apparatus into the magazine arrangement.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: October 29, 2002
    Assignee: Eastman Kodak Company
    Inventors: Scott M. Fitzgerald, Jan A. Chrisler, Daniel M. Pagano
  • Patent number: 6327769
    Abstract: A tool for brake spring maintenance provides the ability both to release brake springs and then hold them out of the way for removal and replacement of brake shoes or for other maintenance operations related to drum brake arrangements. A main support bar is adapted to be received on an exposed wheel mounting member. The bar has a pair of threaded pins and cooperating threaded nuts for controlled axial movement of the pins. The pins have hooked ends and are situated for engaging respective brake springs whenever the tool is properly positioned on the exposed wheel mounting member. By rotating the threaded nuts to move the pins a set axial distance with the pin hooked ends engaged with the brake springs, such springs can be drawn back from their hold on the brake shoes, to permit disassembly and maintenance of the entire drum brake arrangement.
    Type: Grant
    Filed: March 20, 2000
    Date of Patent: December 11, 2001
    Inventor: James H. Strickland
  • Patent number: 5531008
    Abstract: An apparatus for making a bubble spring assembly includes a base member having a side surface and a head assembly. A track way extends along one side surface of the base toward the head assembly. The track way is employed for guiding a respective spring blank into the head assembly. A push block is provided for moving the spring blank along the track way and into the head assembly. A shaping mechanism is provided within the head assembly for receiving the respective spring blank from the track way and for shaping the spring into a predetermined form having a predictable stress strain history along the length of the shaped spring blank. A retaining gate is located proximate the shaping mechanism for positioning a respective cavity block adjacent the shaping mechanism. A transfer rod is provided within the head assembly for moving a shaped spring blank from the shaping mechanism into the cavity block in the absence of further deformation to the shaped spring blank.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 2, 1996
    Assignee: Eastman Kodak Company
    Inventors: Michael J. Chapman, Thomas C. Merle, David L. Rowden
  • Patent number: 5396692
    Abstract: The invention provides an indirect linkage between a spring and a hatch supported by the spring. The torque or moment applied by the hatch is significantly curved. The indirect linkage which provides a first varying moment arm and a second varying moment arm and utilizes a varying ratio between the first moment arm and the second moment arm to provide an applied spring torque which matches the shape of the torque curve applied by the hatch.
    Type: Grant
    Filed: October 28, 1991
    Date of Patent: March 14, 1995
    Assignee: FMC Corporation
    Inventors: Kirby H. Floyd, John J. Busuttil
  • Patent number: 5191917
    Abstract: A spreader tool for the individual coupling and decoupling of heald shafts to or from the respective drive rods or shaft pulls of a heald loom is constructed to be inserted into a gap between two connecting spring sections from above the loom healds for spreading the connecting spring sections apart. The tool has two jaws that are normally biased into their closed position by a spring for insertion into the gap and are then spread apart by a cam drive or the like. The assembly and disassembly is thus greatly facilitated and the time previously required for this type of work has been substantially reduced.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: March 9, 1993
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Valentin Krumm, Armin Hiemer
  • Patent number: 5142761
    Abstract: Reel leaf spring/cassette cover combinations are described, wherein the leaf spring is removably mounted on the cover. In a cam fit embodiment, the spring is held within opposing pairs of projections. In a press fit embodiment, the spring includes lateral pointed members, which are caught between parallel projecting members formed on the cover. A related method of assembly includes the steps of: forming a cassette cover to include a plurality of opposing projections; inserting a leaf spring against the cover at an angle between the projections; and rotating the leaf spring to be removably engaged by the projections. In an alternate embodiment, the leaf spring includes lateral pointed members and the spring is installed straight down, such that the pointed members catch the plurality of projections.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: September 1, 1992
    Assignee: Shape Inc.
    Inventors: Anthony L. Gelardi, Craig Lovecky, Alan Lowery, Robert Barstow
  • Patent number: 4597148
    Abstract: Tool for removing spring clips from a picture frame, in which the clips are arranged between the backing sheet and the channel-shaped frame. The tool comprises an elongated handle from which a shank extends at an angle of about 45.degree., the shank having at its outer end a blade projecting laterally from the shank at opposite sides. At one side the blade is formed with a pair of spaced projections for engaging the spring clip for pulling it out. At the opposite side the blade is similarly formed with a pair of projections which are spaced closer together than the other pair of projections.
    Type: Grant
    Filed: January 11, 1985
    Date of Patent: July 1, 1986
    Inventor: Dori-Jayne Kennedy
  • Patent number: 4506535
    Abstract: A frame having a U-shaped member which is placed over and around a leaf spring to be re-arched while still on a vehicle; a platform pivotally mounted on the U-shaped member, a hydraulic jack supported on the platform so that the ram or piston rod on the jack may be hydraulically forced against a bending member which comprises a pair of spaced spring contact members located on opposite sides of the U-shaped member and on the opposite side of the spring therefrom. The device may be assembled over a spring and hydraulic pressure applied to drive the contact members to create a bending moment about a round surface on the inside face of the top of the U-shaped member. The pressure may be reversed to de-arch the spring.
    Type: Grant
    Filed: December 3, 1982
    Date of Patent: March 26, 1985
    Inventor: Bobby G. Eubanks