Having Stiffener Patents (Class 267/287)
  • Patent number: 10045641
    Abstract: A pallet lifter for raising and lowering a pallet. The pallet lifter includes a pallet platform and a movement mechanism that controllably causes the pallet platform to raise and lower. The pallet platform includes a top surface designed to support a pallet, two side walls, and a back wall. The movement mechanism includes a motor and a threaded rod. The electric motor is designed to cause the threaded rod to rotate in a clockwise and counterclockwise direction to cause said pallet platform to raise and lower.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: August 14, 2018
    Assignee: Lift2Sell, LLC
    Inventors: Curtis Taylor, Aaron Misener, Thomas L. Rattini, Robert H. Unnerstall, Jr., Robert Myler
  • Patent number: 9827964
    Abstract: A pneumatic brake booster includes a drive piston actuating a master cylinder by a push rod while being returned to rest position by a return spring. The brake booster has a vibration damper having a part made of an elastic material working compressively, of overall parallelepipedic shape, with a length greater than the spacing of two coils of the spring prior to its installation in the brake booster and whose front and back faces are equipped with a longitudinal slit penetrating the material mass of the damper for engagement by way of those slits on the two coils of the return spring.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: November 28, 2017
    Inventors: Bruno Berthomieu, Esteve Cortes, Jaume Casasnovas
  • Patent number: 8800972
    Abstract: A vibration insulation damper (10, 50, 60) insertable into an internal circumferential portion of a coil spring (20) and extending in an axial direction thereof, the vibration insulation damper is provided with an elastic body (14a, 14b, 64a, 64b) having a conical or pyramid outer circumferential surface formed so as to be shortened in distance with respect to the axial direction toward an end portion thereof in the axial direction, and a rib (16a, 16b, 16c, 16d, 16e, 16f, 56a, 56b, 56c, 56d, 56e, 56f) protruding outward from the outer circumferential surface of the elastic body to be brought into pressured contact with the internal circumferential portion of the coil spring when the elastic body is inserted into the internal circumferential portion of the coil spring.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: August 12, 2014
    Assignees: F-Tech Inc., Honda Motor Co., Ltd.
    Inventors: Yoshikiyo Sugimoto, Yoshiya Nakashima, Fumikage Yamanaka, Hidemasa Shukuri
  • Patent number: 8740199
    Abstract: According to one embodiment, a spring assembly includes: a substrate; a coil spring having an end turn portion fixed to the substrate; an inner wall provided at an inner peripheral side of the coil spring; and an outer wall provided at an outer peripheral side of the coil spring, wherein one of the inner wall and the outer wall forms a spring fixing wall configured to prevent the end turn portion of the coil spring from coming off in an axial direction of the coil spring, and wherein the other of the inner wall and the outer wall forms a support wall configured to prevent the end turn portion of the coil spring from moving in a radial direction of the coil spring.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: June 3, 2014
    Assignee: Piolax Inc.
    Inventors: Kensuke Takeda, Yasutaka Uematsu, Toshie Fueki
  • Patent number: 8651831
    Abstract: The present invention comprises a suspension spring and snubber arrangement for reducing transmitted noise from a reciprocating compressor at ?-octave frequency band of 500 Hz and preventing the occurrence of resonance frequency during the reciprocating compressor operation, the arrangement comprising: the suspension spring having a plurality of coils and two opposing open ends; at least one snubber for maintaining the integrity and shape of the suspension spring and for preventing displacement of the suspension spring from their intended position; wherein at least one open end of the suspension spring is loosely fitted over the at least one snubber; and further wherein an internal diameter of the suspension spring is larger than a outer diameter of the snubber so that a gap is defined between the suspension spring and the snubber for minimizing physical contact between the suspension spring and the snubber.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: February 18, 2014
    Assignee: Panasonic Refrigeration Devices Singapore Pte Ltd
    Inventors: Akio Yagi, Kar Hoe Chan, Hideki Kawai, Hiroshi Sasano, Chew Thong Khoo
  • Patent number: 8646356
    Abstract: A spring damper for absorbing vibration of a double coil spring is made of elastic material and composed of a cylindrical body, outer-wall convex portions, and inner-wall convex portions. The spring damper is arranged in an annular space formed between an outer coil spring and an inner coil spring of the double coil spring, so that the outer-wall convex portions push the outer coil spring in a radial outward direction and the inner-wall convex portions push the inner coil spring in a radial inward direction. Longitudinal ends of the cylindrical body are prevented from being hooked by spring wires of the outer or inner coil spring, when the double coil spring is expanded and compressed.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: February 11, 2014
    Assignee: Denso Corporation
    Inventors: Kazuyuki Horie, Yoshinori Inuzuka
  • Publication number: 20130175394
    Abstract: An adjustable spring system includes an adjustment member adjustable relative to a coil spring to provide a desired number of unsupported coils. A method of adjusting the spring rate of the spring includes detecting a condition, and driving the adjustment member with an actuator in response to the detected condition. An effective length of the spring is changed with the adjustment member.
    Type: Application
    Filed: January 10, 2012
    Publication date: July 11, 2013
    Inventor: Dale O. Cipra
  • Patent number: 8398060
    Abstract: A dynamic vibration absorber for a vehicle suspension system includes a spring elastically supporting a vehicle body on a vehicle frame, the spring including multiple coils, an isolator secured to at least one of the coils, at least a portion of the isolator being elastically displaceable in response to movement of one of the coils, and a mass formed as unit with the isolator portion, and supported on the isolator for elastic movement.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: March 19, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Kyle W. Stanforth, Steven M. Kline
  • Patent number: 8322694
    Abstract: A vibration isolator is described for inhibiting transfer of vibration to an apparatus during evacuation thereof by a pump. The isolator comprising a bellows for isolating from the ambient atmosphere fluid drawn from the apparatus by the pump. A first flange is connected to one end of the bellows for mounting the isolators the apparatus, and a second flange is connected to the other end of the bellows for mounting the isolator to the pump. The bellows surrounds a resilient element, preferably a helical tension spring, which is substantially co-axial with the bellows. The resilient element has a first end located proximate to the first flange and connected to the second flange, and a second end located proximate to the second flange and connected to the first flange.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: December 4, 2012
    Assignee: Edwards Limited
    Inventors: Barrie Dudley Brewster, Andrew Waye
  • Publication number: 20120049479
    Abstract: Systems and methods provide variable spring stiffness for weight management in a vehicle. One system includes a plurality of springs and a plurality of spring retainers configured to adjust a number of inactive coils of the plurality of springs. Additionally, a motor is provided that is connected to the plurality of spring retainers and configured to actuate the spring retainers to adjust the number of inactive coils of the plurality of springs. Further, a controller is provided that is coupled to motor to control the motor to actuate the spring retainers to adjust the number of inactive coils of the plurality of springs.
    Type: Application
    Filed: August 26, 2010
    Publication date: March 1, 2012
    Inventors: Amit Rajshekar Kalyani, Munishwar Ahuja, Anubhav Kumar, Ravi Kumar, Krishnarao Dhuri, Nikhil Subhashchandra Tambe
  • Patent number: 8029002
    Abstract: An inner and an outer spring plate are disposed, in a radially spaced relationship from one another, on a spring strut cylinder. In a first springing position (normal position), the helical spring is supported with a turn region of small diameter against the inner spring plate. In a second springing position (sports position) of the helical spring, the latter is supported with a turn region of larger diameter against the outer spring plate.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: October 4, 2011
    Assignee: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventors: Steffen Maurer, Matthias Dietz
  • Patent number: 7631882
    Abstract: A vehicle height adjustment device has an adjustment bolt (30) rotatably supported by or fixed to a wheel-side member or a vehicle-body member, and a spring seat member (10) threadedly engaging with the adjustment bolt. Rotation of the spring seat member is limited by a bump rubber pedestal (41) (or a coil spring bracket (9)). Displacement of the spring seat member occurs in an axial direction of rotation of the bolt, in accordance with rotation of the bolt. According to the present invention, rotation of the spring seat involved in rotation of the bolt for adjusting the vehicle height can be restricted, and a construction of a vehicle height adjustment mechanism can be simplified so that the number of parts or members of the device is reduced.
    Type: Grant
    Filed: April 27, 2005
    Date of Patent: December 15, 2009
    Assignee: Isuzu Motors Limited
    Inventors: Satoshi Hirao, Susumu Kawahata
  • Patent number: 7419147
    Abstract: A blocking device for blocking a suspension strut of a motor vehicle for transportation of the motor vehicle. The suspension strut has a damper device and a helical spring. The helical spring is arranged between two spring plates and embraces at least one axial section of the damper device. The blocking device has a spacer body which is of substantially C-shaped design and can be fitted between the two spring plates to the damper device in a manner embracing an axial section on the latter.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: September 2, 2008
    Assignee: Dr. Ing. h.c. F. Porsche AG
    Inventor: Achim Schulz
  • Patent number: 7370854
    Abstract: A compression spring assembly is disclosed herein. The compression spring assembly may be used in a fuel injection device and may include a compression spring having first and second adjacent turns spaced apart by a distance. The compression spring assembly may further include a damping element arranged between the first and second turns and having first and second spaced apart support regions separated by an arched third support region. The first and second support regions may be configured to exert force on a surface of the first turn, and the third support region may be configured to exert force on a surface of the second turn to at least inhibit movement of the first turn toward the second turn during operation of the spring.
    Type: Grant
    Filed: May 5, 2005
    Date of Patent: May 13, 2008
    Assignee: Caterpillar, Inc.
    Inventors: Avtar S Sandhu, Sami I. El-Sayed
  • Patent number: 7357381
    Abstract: Large-diameter projection portions and small-diameter projection portions are formed in each of the two annular plates, while large-diameter end turn portions, which are respectively associated with large-diameter projection portions, and small-diameter end turn portions, which are respectively associated with small-diameter projection portions, are formed in the compression coil springs. Then, a punch having a diameter portion, whose diameter is larger than the inside diameter of the large-diameter projection portion, is inserted thereinto and increases the diameter thereof. Consequently, the large-diameter end turn portions of the compression coil springs are assembled to each of the annular plates.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: April 15, 2008
    Assignee: Piolax, Inc
    Inventors: Masami Wakamori, Toshie Fueki
  • Patent number: 7213802
    Abstract: In a coil spring of closed-end type, the coil spring is characterized in that a coupler is fixedly mounted between: an outer peripheral surface of a terminal convolution of a coil element rod; and, an outer peripheral surface of a subsequent convolution subsequent to the terminal convolution of the coil spring of closed-end type, whereby an amount of initial deflection is decreased.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: May 8, 2007
    Assignees: Neturen Co., Ltd., Tokyo Hatsujyo Manufacturing Co., Ltd.
    Inventors: Eiichi Soga, Yoshiaki Arai, Keisuke Yokota, Yasuhiro Saito
  • Patent number: 6840510
    Abstract: In combination with a railway locomotive brake valve which has an exhaust valve assembly, a spring housing and a range spring, there is a device for providing enhanced damping capabilities. The device minimizes spring oscillation during operation of the locomotive brake valve.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: January 11, 2005
    Assignee: Westinghouse Air Brake Technologies Corporation
    Inventors: Matthew D. Mitsch, James M. Varney
  • Patent number: 6827184
    Abstract: A shock-absorbing device includes an outer threaded tube, a threaded rod having a retractable rod, a compression spring, an adjusting nut, and an urging nut. Thus, when the urging nut on the outer threaded tube is unscrewed, the threaded rod can be rotated relative to the outer threaded tube, thereby adjusting the relative distance between the threaded rod and the outer threaded tube, such that the height of the automobile can be adjusted largely. In addition, the scales of the flat surface can be used to indicate the length of the shock-absorbing device, so that the height of the automobile can be adjusted exactly.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: December 7, 2004
    Inventor: Wei-Li Lin
  • Patent number: 6789790
    Abstract: A device for reducing the resonant vibrations of a helical valve spring of an internal combustion engine includes a member, such as a tension cable, attached between one end of the spring and a coil mid-section of the spring for limiting the movement of the coil mid-section away from the one end of the spring to about the distance between the coil mid-section and the one end of the spring when the spring is in a condition corresponding with a condition at which the spring is in static equilibrium.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: September 14, 2004
    Inventors: Frank H. Speckhart, Brian David Mongold, Hyunjun Chun, Von M Tyler, Jr.
  • Patent number: 6619638
    Abstract: A supplementary spring assembly (104) is fitted to three consecutive turns (86.1, 86.2, 86.3) of a vehicle suspension coil spring (102). The spring assembly (104) includes a central torsion-producing portion (105) having a pair of half-turn torsion springs (106, 108). The half-turn torsion springs (106, 108) are connected to each other by a C-shaped bight portion (109) which engages an intermediate turn (86.1) of the coil spring (102) in a clamping fit. First and second arms (110, 112) extend from opposite ends of the torsion springs (106, 108) and pass slidably through complemental apertures (114) formed in mounting blocks (116). The mounting blocks (116) include a clamping arrangement in the form of a C-shaped recess formed in the block (116) which is sized to fit around non-adjacent turns (86.2, 86.3) of the coil spring (102).
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: September 16, 2003
    Inventor: William Wilfred Spencer
  • Patent number: 6457704
    Abstract: A noise reduction assembly includes a substantially annular isolator and a substantially annular noise guard extending therefrom. The isolator and the noise guard sandwich a first convolution of a vehicle suspension coil spring. The noise guard is aligned to the coil spring such that the noise guard extends between the first and second convolutions between 1.0 and 1.4 turns of the coil spring to prevent contact in this area.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: October 1, 2002
    Assignee: Meritor Light Vehicle Technology, LLC.
    Inventors: Richard Van Eerden, Chris Galea, Anthony VanRoon
  • Patent number: 6186488
    Abstract: An arrangement is provided for blocking a spring in a spring strut of a motor vehicle. A spacer element for transporting a vehicle consists of at least one segment which can be snapped into the spring and is supported by a lower free end on a stationary spring plate of the spring strut.
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: February 13, 2001
    Assignee: Dr. Ing. h.c.F. Porsche AG
    Inventor: Juergen Lauer
  • Patent number: 5906362
    Abstract: To avoid an increase of the number of steps for assembling a coil spring and seat members and a reduction in mechanical strength of the coil spring or the like, a coil spring assembly 20 is provided with the coil spring 25 and the seat members 26. Each seat member 26 has receivers 27 for contacting both ends of the coil spring 25 and projections 28 extending into the coil spring 25 from the receivers 27. Ribs 29 are formed on an outer circumferential surface of the projections 28 for engagement with the coil spring 25.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: May 25, 1999
    Assignee: Exedy Corporation
    Inventor: Yasushi Takehira
  • Patent number: 5772191
    Abstract: A spring assembly for an automatic transmission of automobiles includes a generally ring-shaped spring retainer formed from a synthetic resin material, a plurality of mounting protrusions circumferentially formed on a peripheral face of the spring retainer, and a plurality of coil springs having one ends mounted on the mounting protrusions respectively. Alternatively, the spring assembly includes a pair of generally ring-shaped spring retainers each formed from a synthetic resin material, a plurality of mounting protrusions circumferentially formed on each spring retainer, a plurality of guide protrusions circumferentially formed on each spring retainer so as to be positioned between each mounting protrusion and the adjacent one, and a plurality of coil springs having one ends mounted on the mounting protrusions of either spring retainer and the other ends fitted to the guide protrusions of the other spring retainer respectively.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: June 30, 1998
    Assignee: Togo Seisakusyo Corporation
    Inventors: Yoshinori Nakano, Tetsuya Taniguti
  • Patent number: 5722645
    Abstract: For changing the spring rate of a coil spring in a simple manner, a spacing element is screwable into the coil spring and can be locked in different positions with respect to the coil spring by way of a fixing device. The spring element can, for example, be screwed into the spring via its receiving groove.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: March 3, 1998
    Assignee: Dr. Ing. h. c. F. Porsche AG
    Inventor: Horst Reitter
  • Patent number: 5578167
    Abstract: The etching of a thin substrate (23) is performed using a holder (10). The holder (10) has a base (11) that has a cavity (20). The cavity (20) is pressurized to compensate for the pressure and stress that is applied to the substrate (23) by an etchant solution. The holder (10) also has a sequence of o-rings (22,24,26) that are used to hold the substrate (23) in place and to prevent etchant from leaking into the cavity (20) and attacking a bottom surface (32) of the substrate (23). The pressure necessary to hold the substrate (23) in place is applied by a cover ring (28) that is screwed onto the base (11).
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: November 26, 1996
    Assignee: Motorola, Inc.
    Inventors: Kathirgamasundaram Sooriakumar, Steven A. Switzer, Kenneth E. Stegall, Thomas J. Dunlap, Colleen M. Albrecht
  • Patent number: 5568749
    Abstract: An automotive accelerator return spring assembly has a tension coil spring with a variable diameter internal damper therein. The damper clips to the spring on one end and has tangentially spaced, flexible fingers on the other end for absorbing vibrational energy.
    Type: Grant
    Filed: April 6, 1995
    Date of Patent: October 29, 1996
    Assignee: Ford Motor Company
    Inventor: Lawrence J. Liposky
  • Patent number: 5469590
    Abstract: A mattress is provided with an innerspring unit, one or more layers of foam material disposed over the innerspring unit, and a mattress cover enclosing the innerspring unit and foam layers. The innerspring unit has first and second border wires spaced apart from each other by a predetermined distance and a plurality of spring coils arranged in a plurality of rows between the border wires. Each of the coils is formed of a helical wire member having a plurality of spaced apart convolutions. A plurality of compressible support members are provided between adjacent rows of coils. The support members are generally in the shape of an I-beam, with an upper portion of a first width, a middle portion of a second width, and a lower portion of a third width. The upper portion of each support member is provided between a first two adjacent convolutions of the coil springs and the lower portion of each support member is provided between a second two adjacent convolutions of the coils.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: November 28, 1995
    Assignee: The Spring Air Company
    Inventor: LeRoy J. Simon
  • Patent number: 4832321
    Abstract: The invention herein is a coil spring assembly for the suspension of a vele including a series of plates whose tapered edges protrude between the coils of the spring. The plates are slideably mounted on bolts parallel to the longitudinal axis of the spring, the bolts being moveable toward or away from the longitudinal axis of the spring. The resulting movement of the plates toward or away from the spring causes a thicker or thinner zone of the tapered edge of the plate to be disposed between the spring coils, thereby changing the degree to which the plates stiffen the spring.
    Type: Grant
    Filed: July 11, 1988
    Date of Patent: May 23, 1989
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: James A. Aardema
  • Patent number: 4830348
    Abstract: A noise suppressing device for a coil spring, and the combination of a spring equipped with such a device, in which the noise suppressing device takes the form of at least one spring metal sleeve of arcuate C-shaped cross section extending about and tightly engaging a portion of the spring intermediate the length thereof. A lug portion of the sleeve projects into the spacing between a pair of adjacent coils and limits the extent of sliding movement of the sleeve along such coils as the spring expands and contracts.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: May 16, 1989
    Assignee: Perfection Spring & Stamping Corp.
    Inventor: Peter G. Seyler
  • Patent number: 4779854
    Abstract: A vibration damper for bodies which extend substantially parallel to one another, consisting of a clip made of a permanently elastic material and adapted to be slipped undislodgeably onto one of the bodies, and of at least two lugs projecting therefrom in the direction of at least one further body which clasp the latter with elastic initial tension, permitting relative displacement.
    Type: Grant
    Filed: September 22, 1987
    Date of Patent: October 25, 1988
    Assignee: Firma Carl Freudenberg
    Inventors: Werner Idigkeit, Benno Jorg, Heinz Seifert
  • Patent number: 4744549
    Abstract: A coil spring for a motor vehicle wheel suspension system having two spring segments spaced apart in the axial direction along the central spring axis and a reinforced connecting piece extending parallel to the central spring axis for connecting the two spring segments. The two spring segments and the connecting piece form a unitary structure.
    Type: Grant
    Filed: July 30, 1986
    Date of Patent: May 17, 1988
    Assignee: Daimler-Benz Aktiengesellschaft
    Inventors: Manfred von der Ohe, Achim Hespelt, Arthur Borlinghaus
  • Patent number: 4732372
    Abstract: Damping elements physically contact some of the coils on one or more mechanical coil springs disposed between a railway car body and a truck. The coils contacted may be at the ends of the springs or at areas between the ends. When double springs are involved, with one being spaced within the other, the damping elements are disposed in the space between the springs at the ends thereof.
    Type: Grant
    Filed: July 11, 1986
    Date of Patent: March 22, 1988
    Assignee: Budd Company
    Inventors: William W. Dickhart, III, James M. Herring, Jr.
  • Patent number: 4699257
    Abstract: A variable frequency vibration isolator for isolating vibrations between a base and a load having relative displacement of each other characterized by a pair of coil springs in series with a connector between them. The connector is journally mounted for axial movement in response to spring vibrations. Locking means including a timing circuit for clamping and unclamping the connector against movement, so as to improve vibration isolation at frequencies higher than approximately 2f.sub.n while substantially improving the performance at lower frequencies.
    Type: Grant
    Filed: April 14, 1986
    Date of Patent: October 13, 1987
    Assignee: Westinghouse Electric Corp.
    Inventor: Wayne B. Lloyd