Coil Patents (Class 267/155)
  • Patent number: 5105673
    Abstract: A setting-up apparatus of over-centering coil springs comprises a base plate having a first opening, an oscillating member having a second opening and journalled on the base plate so as to be displaced between a first position and a second position, a coil spring provided with a first leg engaged with said first opening and a second leg engaged with said second opening in order to hold said oscillating member at either one of said first position and the second position separated by a centering dead point of the oscillating member, and a communication opening communicated with said first opening. The communication opening is adapted to receive the first leg of the coil spring without compression of the coil spring when the second leg is engaged with the second opening which doesn't have the communication opening.
    Type: Grant
    Filed: June 21, 1991
    Date of Patent: April 21, 1992
    Assignee: Mitsui Kinzoku Kogyo Kabushiki Kaisha
    Inventor: Thoru Shibata
  • Patent number: 5072913
    Abstract: A spring loaded locking handle assembly for an angle cock or the like wherein the helical windings of a torsion type spring are mounted on a fulcrum pin about which the handle proper of a two-piece, locking style handle assembly is pivotally connected to the handle socket. One leg of the torsion spring is fixed to the socket via a pilot hole therein and an aligned index hole in the fulcrum pin to properly locate and secure the fulcrum pin in place. The other leg of the torsion spring bears against the handle proper under tension to positively maintain the handle member in its locked position and to prevent accidental operation of the angle cock.
    Type: Grant
    Filed: April 12, 1991
    Date of Patent: December 17, 1991
    Assignee: Westinghouse Air Brake Company
    Inventors: John B. Carroll, Robert T. Sarsfield
  • Patent number: 5052404
    Abstract: A torque transmitter includes three coaxial helically wound springs of different inner and outer diameters positioned relative to each other such that the inner and outer generally circumferential surface of the center spring form interference fits with, respectively, the outer generally circumferential surface of the inner spring and the inner generally circumferential surface of the outer spring. The inner and outer springs are wrapped in one direction and the center spring is wrapped in the opposite direction.
    Type: Grant
    Filed: August 17, 1990
    Date of Patent: October 1, 1991
    Assignee: The MicroSpring Company, Inc.
    Inventor: William S. Hodgson
  • Patent number: 4976417
    Abstract: An end attachment assembly for a twisted rope torsion bar includes anchor nut, an elastomeric hub and a wrap spring adapted for cooperative interaction. The anchor nut provides strength and durability while the elastomeric hub provides resilience and elasticity to beneficially accept the angular deflection of the composite, twisted rope torsion bar when torque is applied. The elastomeric hub is molded onto the end of the torsion bar to improve its connection therewith. The torsion bar is preferably fabricated of a lightweight glass fiber/epoxy composite material. In assembled relation, the nut and hub provide a substantially continuous, even cylindrical surface which cooperates with the wrap spring. The wrap spring tightly engages the nut and hub, securely maintaining the components in adjacent relation. The wrap spring constricts in the presence of applied torque, resulting in a tighter and tighter grip when influenced by increasing torque in a working environment.
    Type: Grant
    Filed: August 14, 1989
    Date of Patent: December 11, 1990
    Assignee: General Motors Corporation
    Inventor: Jack E. Smith
  • Patent number: 4923181
    Abstract: Leaf and wire form springs for use in the rear-seat storage compartments of Corvette motor cars. Either spring can be attached to the compartment frame and extend inwardly to engage the bottom of the push button housing. The spring allows the keeper finger on the frame to be engaged by the latch and hold the cover down. When the finger is released, the spring pushes the cover far enough upwardly so it can be grasped by the fingers and moved all the way open.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: May 8, 1990
    Assignee: Street Specialty Products Inc.
    Inventor: James T. Streett
  • Patent number: 4901396
    Abstract: An ice discharging apparatus of an ice dispenser comprises an openable door normally urged resiliently to a closed state by means of a torsion coil spring and adapted to be openable by a door actuator under the control of a control apparatus. The torsion coil spring includes an intermediate coil portion substantially of a cylindrical form and at least one end coil portion having an inner diameter greater than an average diameter of the intermediate coil portion in the unloaded state. The torsion coil spring has at least one arm extending from an end of the coil spring and having an extension secured in contact with a stationary part of the apparatus or a part of the openable door at an intermediate portion thereof and subsequently bent to constitute an inactive portion in which an annular mounting member for mounting the torsion coil spring is formed at the free end thereof.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: February 20, 1990
    Assignee: Hoshizaki Electric Co., Ltd.
    Inventors: Susumu Tatematsu, Yasumitsu Tsukiyama, Naoya Uchida
  • Patent number: 4895042
    Abstract: A pump lever for a jack is disclosed which comprises a protrusion formed near a plunger of a fluid pump for the jack; a handle sleeve having a first end and a second end, the first end being adapted to receive a handle and the second end being pivotally joined at said protrusion by a first pin, and in addition, a certain position between the first and second ends of the handle sleeve being pivotally joined with the plunger by a second pin; and a torsion spring having a pair of counteraction portions and a loop portion shaped between said pair of counteraction portions, the loop portion being passed through and supported by the first pin, and the pair of counteraction portions being adapted to respectively make contact with the protrusion and the second pin so that the torsion spring will urge the handle sleeve to raise to its uppermost position when one frees the handle, the top end of which is received in the first end of the handle sleeve at a lowered position.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: January 23, 1990
    Inventor: Akie Wang
  • Patent number: 4880207
    Abstract: A cup-shaped spring holder having a flange on the outer periphery on the open end side is secured on the end portion of a valve shaft which protrudes outwardly from a carburetor barrel, with a clearance for coil insertion provided between the barrel and the open-end side. An outer torsion coil spring is fitted in the aforementioned spring holder to restrain an axial shift of the spring. And one end of an inner torsion coil spring fitted on the aforementioned shaft end portion is led out through the aforementioned clearance and retained by a spring retainer on the aforesaid barrel. Because of the above-described constitution, this invention features simple construction, easy manufacture, increased mechanical strength, a less number of components parts required, easy assembly, and improved valve shaft strength.
    Type: Grant
    Filed: October 13, 1988
    Date of Patent: November 14, 1989
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Osamu Matsumoto, Mamoru Sumida, Hirokazu Maehara
  • Patent number: 4871153
    Abstract: A tape cassette has a case with upper and lower halves and an open space at the front thereof. A magnetic tape housed in the case is wound around a pair of reels. A brake is slidably mounted on the inner surface of the lower half of the case to prevent the reels from being rotated. Part of a spring is attached to the brake. The spring has free ends and urges the brake in a direction. A device for positioning the spring includes a partition wall on the inner surface of the lower half of the case which partitions the open case from the inside of the case. An independent abutment member on the partition wall abuts the free ends of the spring.
    Type: Grant
    Filed: June 13, 1988
    Date of Patent: October 3, 1989
    Assignee: TDK Corporation
    Inventors: Kimio Tanaka, Takateru Satoh, Haruo Shiba
  • Patent number: 4839548
    Abstract: An external-rotor dynamo for the rear wheel of a bicycle is pivotable about an axis parallel to its axis of rotation. The rotor is pressed toward the wheel rim by a helicoidal torsion spring secured along the axis of rotation in separate bearings. One of these bearings is angularly adjustable via a quick-acting but releasable ratchet.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: June 13, 1989
    Assignee: Union Sils, Van de Loo & Co.
    Inventor: Hans Bech
  • Patent number: 4838387
    Abstract: Each of a pair of brakes arms has a boss portion formed with a cavity around a pivot on an arm bracket for supporting the brake arms on the body of a bicycle. A pair of return springs for biasing the brake arms toward or away from each other for braking each have a coil portion provided around the pivot and accommodated in the cavity. The return spring has one end fixedly engaged in the boss portion and the other end fixedly engaged in a spring adjusting member which is supported by the pivot and rotatable only in the coil portion winding direction. Thus, each return spring is protected from corrosion, made smoothly operable for the desired braking action and readily adjustable by turning the adjusting member.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: June 13, 1989
    Assignee: Yoshigai Kikai Kinzoku Co., Ltd.
    Inventor: Kenichi Yoshigai
  • Patent number: 4830151
    Abstract: A damper for damping rotation has a construction in which a rotor having a braking plate immersed in oil disposed within a casing and a gear are coupled together by a means of a clutch spring in the form of a coil spring. When the gear is rotated in one direction, it is coupled with the rotor as a result of diametrical contraction of the spring, and a restoring force is stored within the clutch spring, thus producing a resistance against rotation. When it is rotated in the opposite direction, the restoring force of the clutch spring is released so as to permit free rotation of the gear. The coil spring is coiled about a shouldered portion of the rotor shaft and a lower portion of a gear sleeve, supporting the gear, which have the same diametrical extent. In this manner, projecting end portions of the spring, upon which excessive loads have been impressed within the prior art, are able to be eliminated thereby providing extended service life to the spring and damper assembly.
    Type: Grant
    Filed: April 25, 1988
    Date of Patent: May 16, 1989
    Assignee: Nifco, Inc.
    Inventor: Masanori Numata
  • Patent number: 4828235
    Abstract: A torsion spring assembly particularly adapted for use in closing the throttle valve of an automotive throttle body or carburetor. The spring assembly includes a torsion spring having a series of intermediate coils and having reduced diameter end coils. Telescoped into each end of the spring and gripped by the reduced diameter end coils in the sleeve of a bushing having a radially extending flange which captivates the spring against axial movement.
    Type: Grant
    Filed: July 29, 1987
    Date of Patent: May 9, 1989
    Assignee: Michigan Spring Company
    Inventor: Dee A. Paggeot
  • Patent number: 4822200
    Abstract: At least one torsion spring is traversely mounted between first and second elements of an overload protector. One end of the spring is elongated to form a pressure arm which bears against the second element.
    Type: Grant
    Filed: December 2, 1987
    Date of Patent: April 18, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventor: Klaus Berner
  • Patent number: 4817927
    Abstract: This invention relates to a novel anchor cone and winding cone apparatus and method for mounting a coil torsion spring to an overhead door. Indicia are provided on the cones to assure proper orientation of the cones to the spring and the cone/spring assembly to the overhead door. The winding cone includes arrow indicia to clearly indicate the direction of rotation for the winding cone to increase tension on the coil torsion spring. A groove break is provided in each cone to substantially reduce chafing and wear of the corresponding coil of the coil torsion spring.
    Type: Grant
    Filed: August 21, 1986
    Date of Patent: April 4, 1989
    Assignee: Martin Door Manufacturing
    Inventor: David O. Martin
  • Patent number: 4793444
    Abstract: A caliper brake for a bicycle which includes a pair of fixing bases, brake arms including respective brake shoes and bosses, and return springs, wherein the boss of each brake arm is provided with a cavity in which the return spring is housed. A spring holder for each return spring is rotatably mounted with respect to the associated brake arm boss. Since the relative rotation of the spring holder with respect to the boss is regulated in a predetermined range, the return spring is given a preload, and the spring holder is fixed to the fixing base, each brake arm can be easily assembled with the fixing base.
    Type: Grant
    Filed: July 7, 1987
    Date of Patent: December 27, 1988
    Assignee: Shimano Industrial Company Limited
    Inventor: Masashi Nagano
  • Patent number: 4735106
    Abstract: A brake operating device comprising a housing having a bearing portion, an operating lever supported by a pivot on the bearing portion, and a coiled return spring having a pair of engaging portions extending from the axial opposite ends of its coil portion laterally outward for biasing the lever in a returning direction. The coil portion of the spring is accommodated inside the operating lever and has its axis positioned in parallel with the axis of the pivot. One of the engaging portions is attached to the bearing portion, and the other engaging portion extends along the lever and has a slider slidably in contact with the lever inner surface. The spring is therefore retained in position, properly biasing the lever in the returning direction.
    Type: Grant
    Filed: February 25, 1987
    Date of Patent: April 5, 1988
    Assignee: Yoshigai Kikai Kinzoku Co., Ltd.
    Inventor: Toshiharu Yoshigai
  • Patent number: 4729254
    Abstract: There is disclosed a mechanism for stationarily supporting an operation panel mounted on a steeering wheel of a movable body. This mechanism includes two external gears between which said steering wheel is interposed, and two satellite gears resiliently urged toward the external gears. One of the external gears is stationary and the other has an operation panel secured thereto. Two satellite gears are rotated in the same direction and as a result, the operation panel is rotated in the opposite direction to that of the steering wheel and keeps substantially stationary. Further, there is disclosed a signal transmitting system for a radiotelephone in the movable body. A microphone is provided on the operation panel and a speaker unit is located at any position in the movable body. A duplex signal transmitting path having a howling control function is provided between the microphone and the speaker unit.
    Type: Grant
    Filed: November 14, 1986
    Date of Patent: March 8, 1988
    Assignees: Isumi Corporation Industries, Inc., Izumi Motor Co., Ltd.
    Inventors: Masateru Nogami, Hozumi Suzuki
  • Patent number: 4697673
    Abstract: A one-way damper has a rotor which is provided with a braking disc at one of its ends. The braking disc is received in a housing of the damper and the housing is filled with oil. The other end of the rotor extends outward from the housing and has a gear loosely mounted thereon. The gear is engaged with a coil spring. When the gear rotates in one direction, the coil spring is reduced in diameter so that it grips the rotor, making it possible for the torque of the gear to be transmitted to the rotor through the coil spring. When the gear rotates in the other direction, the coil spring is expanded in diameter so that it does not grip the rotor, making it possible for the gear to turn freely. The one-way damper is used in association with a lid or door to damp one but not the other of the opening and closing operations.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: October 6, 1987
    Assignee: Nifco Inc.
    Inventor: Nobuaki Omata
  • Patent number: 4690390
    Abstract: Increased thickness for the center two coils of an overrunning clutch spring is achieved by gradually increasing the lead a few degrees before and after the central crossover point (25). This affects the centrifugal balance of the spring less than an abrupt increase in thickness at the crossover point (25).
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: September 1, 1987
    Assignee: United Technologies Corporation
    Inventor: Jules G. Kish
  • Patent number: 4666386
    Abstract: A rotary pump has a housing 1 with a driven rotor 7 installed in the housing 1. Vanes 12 are connected around the periphery of the rotor 7. Helical springs 14 are supported against rotor 7, which, acting on an inner surface of vanes 12, press the free end of the vanes 12 against the bore 6 of the housing 1. Each spring 14 has two coaxial sections of turns which spiral in opposite directions so that the springs 14 press the vanes 12 against the bore 6 of the housing 1 without tilting. These sections of turns are each designed with an adjacent support end 21 on the outer or inner section and a bail section, which is arranged between the inner and outer end of the sections of turns, connecting the inner and outer ends of these sections of turns rigidly together, and which projects radially beyond the sections of turns.
    Type: Grant
    Filed: August 26, 1985
    Date of Patent: May 19, 1987
    Assignee: SKF GmbH, Schweinfurt
    Inventors: Otmar Winkler, Heinz Peter, Manfred Krug, Siegbert Kessler, Ludwig Feuerer
  • Patent number: 4661895
    Abstract: An equipoised lamp is provided which comprises a lamp head mounted on an adjustable arm assembly which is counter-balanced by internal coaxial torsion springs mounted within the adjacent end sections of the arms. The end sections are bent at, so that the arms may be set to desired angular positions about respective mutually perpendicular axes. The arms may be mounted on an upright base so that the assembly constitutes a floor lamp, or they can be clamped to a table, to provide a draftsman's lamp assembly, and the like. The lamp head itself is mounted at an intermediate position on one of the arms, so that the end of that arm may form a handle for manually adjusting the lamp head to any desired position without any need to touch the hot lamp.
    Type: Grant
    Filed: March 31, 1981
    Date of Patent: April 28, 1987
    Inventor: James R. Hull
  • Patent number: 4657233
    Abstract: A coil spring, mounted within a cylinder and axially coincident with the pivot axis between a trailer and a ramp pivotally attached thereto, exerts a force angularly proportional to angular deviation of the ramp from its upright position to reduce the apparent weight of the ramp during manual repositioning of the ramp.
    Type: Grant
    Filed: April 19, 1985
    Date of Patent: April 14, 1987
    Inventor: James W. Vroom
  • Patent number: 4648609
    Abstract: A torsion or hairpin spring external attachment for power hammers has eye ends respectively bottomed on the power hammer casing and on the tool driven by the hammer for maintaining the tool against the work and supporting a load on the power hammer while reclaiming an optimum spacing of the hammer relative to its anvil after each hammer blow to increase the efficiency of the power hammer. The attachment spring is easily applied and removed and can be supplied in a wide range of stiffness to accommodate different work conditions with the stiffness of the spring increasing with the hardness or impact resistance of the work. Downcrowding loads on the power hammer can be increased while maintaining the optimum spacing of the hammer and anvil to increase the work output of the power hammer. The spring attachment permits rotation of the power driven tool.
    Type: Grant
    Filed: January 22, 1985
    Date of Patent: March 10, 1987
    Assignee: Construction Robotics, Inc.
    Inventor: Robert F. Deike
  • Patent number: 4625943
    Abstract: A throttle valve for regulating the introduction of a fuel-air mixture into an internal-combustion engine is provided with a return spring system. The return spring system includes a first coiled spring, a second coiled spring, a hat-shaped bushing for separating the two spring coils and a lever, fixed in relation to a throttle valve housing, for simultaneously loading both spring coils to yieldably urge the throttle valve toward a normal position. The return spring system is positioned at one end of a shaft on which the throttle valve is mounted and operates to yieldably rotate the shaft in a selected direction to orient the throttle valve.
    Type: Grant
    Filed: November 5, 1984
    Date of Patent: December 2, 1986
    Assignee: Dr. Ing. H.c.F. Porsche Aktiengesellschaft
    Inventor: Klaus Groger
  • Patent number: 4597474
    Abstract: A brake for a bicycle comprising a pair of mounting bases, a pair of cantilevers having brake shoes supported rotatably to the mounting bases respectively, return springs, and cylindrical members separate from the mounting bases and cantilevers which cover the springs. The cantilevers have fitting portions fitted to the cylindrical members so that the cylindrical members form spring chambers into which the springs are housed therein respectively.
    Type: Grant
    Filed: July 29, 1983
    Date of Patent: July 1, 1986
    Assignee: Shimano Industrial Company Limited
    Inventor: Masashi Nagano
  • Patent number: 4588175
    Abstract: The present invention relates to a novel torsion spring apparatus and method wherein anchor loops are formed in the end coil of the torsion spring to permit anchoring the spring directly to the appropriate mounting bracket. The provision of anchor loops in the end coil of the torsion spring effectively eliminates the requirement for conventional mounting inserts for the torsion spring and simultaneously increases the effective length of the torsion spring or, alternatively, permits the torsion spring to be shortened by the number of coils that would be otherwise rendered ineffective by the presence of a prior art insert.
    Type: Grant
    Filed: October 12, 1984
    Date of Patent: May 13, 1986
    Assignee: Martin Door Manufacturing
    Inventors: David O. Martin, Lawrence G. Martin
  • Patent number: 4582653
    Abstract: A double coil spring assembly to serve as a closing force for throttle valves of carburetors or throttle bodies, the spring assembly including an integral spool with inner and outer arbors supported on a closed end to separately support inner and outer coil springs, there being lands on the outer arbor to position axially the outer spring, and the inner spring as an installable component in the assembly of the carburetor or throttle body.
    Type: Grant
    Filed: February 28, 1985
    Date of Patent: April 15, 1986
    Assignee: Walbro Corporation
    Inventors: Terry L. Blanchard, Albert L. Haas
  • Patent number: 4579017
    Abstract: A restoring device for an adjusting element, which serves in particular for restoring a throttle device of an internal combustion engine. The restoring device has a first spring subject to bending, which is disposed on a bushing that is rotatably supported about a throttle valve shaft and with one end engages a step of the bushing, while the other end of the spring is hooked onto the housing on the throttle valve fitting. A lever is connected with the shaft. The first spring subject to bending acts in the restoring direction of the throttle valve. A second spring subject to bending is disposed in the bushing, one end of this spring engaging the bushing and the other end being supported on the lever. The spring force of the second spring subject to bending is less than that of the first such spring, so that the bushing, with a stop step, is rotated so far that the second spring has not influence in the restoring direction upon the throttle valve.
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: April 1, 1986
    Assignee: Robert Bosch GmbH
    Inventor: Hermann Nusser
  • Patent number: 4576762
    Abstract: A throttle return spring assembly having inner and outer torsion springs contained between end housings is preassembled and then mounted as a unit about a throttle body shaft.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: March 18, 1986
    Assignee: General Motors Corporation
    Inventors: Michael D. Griffin, Ronald A. Waydelis
  • Patent number: 4567968
    Abstract: The invention relates to a locking element for a disc brake with a sliding caliper and a disc brake comprising such a locking element. The brake includes a caliper mounted in sliding relationship on a fixed support by two axial posts cooperating with bores formed in the caliper. The bores are provided with indentations allowing the introduction of the posts transversely and without dismounting the latter. One of the posts is provided with a locking bush maintained locked to the caliper by a locking element of which one portion passes through an orifice formed in the caliper and locking the bush and of which another portion in the shape of a U fixes the locking element relative to the caliper.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: February 4, 1986
    Assignee: Societe Anonyme D.B.A.
    Inventor: Michel Denree
  • Patent number: 4537233
    Abstract: This invention provides for a loading arm for use with material handling systems and includes a support structure and an arm pivotally attached to the support structure for swivel movement in both the horizontal and vertical plane relative to the support structure.
    Type: Grant
    Filed: June 21, 1983
    Date of Patent: August 27, 1985
    Assignee: Continental Emsco Company
    Inventors: Evart. J. Vroonland, William M. Curtis
  • Patent number: 4483511
    Abstract: A valve assembly of a trunnion type valve such as a ball valve in which a valve seat retainer having a valve seat at its one end is slidably received in a valve casing and a biasing means is provided between the other end of the valve seat retainer and an annular shoulder of the valve casing opposing the former. The biasing means is comprised of a ring and a plurality of spring elements which are kept in a circular arrangement by the connecting ring and each have a substantially U-shaped profile for biasing the two end surfaces of the valve casing and the valve seat retainer. Since the biasing means is simple and can be readily adapted to valves of different sizes, it offers a great advantage in use. Furthermore, the manufacture of the biasing means is simple and causes almost no material loss in the manufacturing process.
    Type: Grant
    Filed: September 15, 1983
    Date of Patent: November 20, 1984
    Assignee: Kitamura Valve Mfg. Co., Ltd.
    Inventors: Kazuhiko Kushida, Ryoji Suyama
  • Patent number: 4458549
    Abstract: The essential feature of the invention includes that both ends of a single torsion spring are elongated to form both arms which are engaged with a swinging lever actuated by the select operation and a fixed lever in such a manner that select return force at high and low gear position in select operation is equalized. Further feature of the invention is that a select return spring is provided at an area defined independently from the select shaft and a bell crank shaft.
    Type: Grant
    Filed: January 25, 1982
    Date of Patent: July 10, 1984
    Assignees: Toyota Jidosha Kogyo Kabushiki Kaisha, Manno Kogyo Company, Limited
    Inventors: Akira Tani, Yasuo Kito
  • Patent number: 4439946
    Abstract: An accessory for coil spring traps utilized in enhancing the spring strength of the trap and including a spring mounting frame capable of accommodating either one or two booster springs. The spring mounting frame includes a base bar with a pair of laterally spaced sleeves projecting therefrom for mounting reception over the normally extending free ends of the spring frame of a coil spring trap. The sleeves in turn mount auxiliary coil springs, the opposed projecting ends of which engage beneath the trap across member and one of the jaw manipulating follower plates.
    Type: Grant
    Filed: July 12, 1982
    Date of Patent: April 3, 1984
    Inventor: Anthony L. Altier
  • Patent number: 4403978
    Abstract: This invention concerns a derailleur for a cycle, comprising a yoke provided with a chain-guide pinion and a chain-tensioning pinion
    Type: Grant
    Filed: October 14, 1980
    Date of Patent: September 13, 1983
    Assignee: Establissements Huret & Fils
    Inventor: Roger H. M. Huret
  • Patent number: 4385552
    Abstract: Two anti-backdraft shutters are each supported in an exhaust fan assembly casing on a set of upper and lower parallel support arms. Outer ends of each set of these arms are pivotably mounted in the casing in closely adjacent relation to the other set on substantially vertical axes in closely adjacent relation to an exhaust fan motor and between the motor and an intake port defining the intake end of the casing. The shutters can move between an open position in almost parallel relation to each other with the fan-motor in between under the action of air being exhausted, and a closed position where the shutters close off the entire intake port. A coil spring urges the shutters to move toward closed condition.
    Type: Grant
    Filed: April 16, 1981
    Date of Patent: May 31, 1983
    Inventor: Marvin Nabben
  • Patent number: 4350055
    Abstract: A lever operated control for two transverse shafts connected for rotating drive control devices. The lever rotates in a first plane normal to a shaft and in second plane in the direction of the shaft. Two spring elements connect the shafts and lever maintaining the lever in a neutral position until operated.
    Type: Grant
    Filed: May 23, 1980
    Date of Patent: September 21, 1982
    Inventor: Sakari Pinomaki
  • Patent number: 4346787
    Abstract: The energy recovery device includes a housing having a central shaft which is connected to a lever operating a work-load system capable of generating work-load forces. The central shaft is also connected to a disk having four posts generally parallel to the shaft and initially located at positions corresponding to the four major points of a compass. Within each corner of the housing, a helically coiled spring is positioned over a support post. Each spring has two extending arms which contact two respective adjacent posts on the disk so as to maintain the spring under tension. When the lever is at the neutral position, i.e., when no work-load forces are generated, the recovery forces generated by the four springs within the housing are generally balanced. As the lever is displaced from the neutral position by a driving force, the disk rotates whereby the angular displacement between the arms of any spring decreases. Once the disk is displaced, the spring forces aid in continuing displacement of the disk.
    Type: Grant
    Filed: May 9, 1980
    Date of Patent: August 31, 1982
    Assignee: ERD, Inc.
    Inventor: Vernon Evans
  • Patent number: 4307626
    Abstract: In a tilt handle, including a steering shaft, supported by a sleeve the lower end of which is pivotably provided so as to adjust an inclination angle of the tilt handle with relation to a car body, a device for adjusting the inclination angle of the tilt handle includes a stationary bracket, a movable bracket and spring means therebetween, the stationary bracket being positioned at a proper portion of the car body. The movable bracket is located at a suitable portion of the sleeve and is movable within the stationary bracket. The spring means is provided for energizing the sleeve to move upwardly.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: December 29, 1981
    Assignees: Nissan Motor Company, Fuji Kiko Kabushiki Kaisha
    Inventors: Yuichi Sanada, Satoshi Kinoshita, Akio Kamoshita
  • Patent number: 4299134
    Abstract: Resilient shift mechanism for shifting gears in a transaxle, transmission, gear box, or the like is provided. In a gear drive for a small vehicle such as a garden tractor or a self-propelled lawn mower, it is often difficult to disengage a shift dog from a gear when under a heavy load. In some instances, the shift mechanism, such as a shifter fork, can be distorted, bent, or broken. The new shift mechanism includes a shifter fork for moving a shift dog or clutch collar and a resilient shift lever for moving the shifter fork. The lever has a resilient leg which yields when the shift lever attempts to move the shift dog while the transmission is under a heavy load. The resilient shift lever, being stressed, will subsequently shift the shift dog when the load has diminished.
    Type: Grant
    Filed: November 29, 1979
    Date of Patent: November 10, 1981
    Assignee: The J. B. Foote Foundry Co.
    Inventors: Richard H. Roy, Douglas F. Edwards
  • Patent number: 4286404
    Abstract: There is provided an animal trap construction, in which a coil spring is adapted, upon springing of the trap, to cause a swing arm to pivot upwardly through a vertical arc, and tighten a noose around the leg of an animal. The coil spring is contained between two upstanding brackets, and an end portion of the swing arm, bent at right angles to the latter, passes centrally through the spring, and passes through the two brackets. A first bushing of cylindrical form is fixed within the end of the spring remote from the bend location between the swing arm and its end portion, the first bushing having a smaller-diameter cylindrical extension passing through an aperture in the respective bracket. A second bushing is provided at the other end of the coil spring, the second bushing having a flange which is adapted to be located between the coil spring and the respective bracket. The end portion of the swing arm passes through both bushings.
    Type: Grant
    Filed: February 5, 1980
    Date of Patent: September 1, 1981
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of Natural Resources
    Inventors: Milan Novak, William F. Adams
  • Patent number: 4285676
    Abstract: A tensioning device for maintaining a predetermined amount of tensioning force on an endless drive belt for a vehicle accessories drive system. A housing is mounted in a fixed position on the vehicle engine adjacent the drive belt. A lever is pivotally mounted on a shaft which is located within the housing and extends generally radially outwardly from the housing and is adapted to move in a belt tensioning direction. A first pair of cylindrical, torsional coil springs is telescopically mounted on the shaft, with the springs being located one on each side of the lever. A second pair of cylindrical, torsional coil springs is telescopically concentrically mounted on the shaft and surrounds the first spring pair. One end of each spring is attached to the housing with the other spring ends being attached to the lever. The spring pairs are placed in torsion and bias the lever in the belt tensioning direction.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: August 25, 1981
    Assignee: Dyneer Corporation
    Inventor: Derald H. Kraft
  • Patent number: 4203305
    Abstract: A flexible coupling for torque transmission having a plurality of helical beams extending between the coupling ends, the helical beams having beam cross-sectional dimensions selected to provide equal stresses in operation at the inner and outer diameters of the beams, irrespective of direction of rotation and being of a ratio of depth to thickness to provide for substantially simultaneous failure in the buckling and elastic modes when rotated in a direction opposite the direction of beam spiral, whereby the load capacity of the coupling is independent of the direction of coupling rotation.
    Type: Grant
    Filed: December 13, 1978
    Date of Patent: May 20, 1980
    Inventor: Richard H. Williams
  • Patent number: 4098472
    Abstract: One end 10a of a bail arm return coil spring 10 mounted around a post 5 is extended into the bail mounting projection 4 on the side of the reel rotor 3. The extended end of the spring is given an L-shaped configuration and the down-turned end 11 of the spring is selectively engageable in any one of a plurality of accomodating holes 12, 12', 12"provided in the rotor housing wall 4a, whereby the biasing force applied by the bail arm spring may be quickly and easily changed.
    Type: Grant
    Filed: February 28, 1977
    Date of Patent: July 4, 1978
    Assignee: Ryobi, Ltd.
    Inventor: Kounin Sazaki
  • Patent number: 4027899
    Abstract: A trailer for a motorcycle including a hitch formed of two parallel flat plates attached to the trailer by a hinge having a transversely disposed horizontal axis. Another flat plate is sandwiched between the two parallel plates and the plates are fastened together by a pin inserted through holes in the plates to form a hinge having a vertical axis. Tubular members are mounted to the motorcycle and receive extensions adjustably mounted to the inner flat plate to thereby attach the trailer to the motorcycle. The trailer also has a resilient suspension system for the trailer road wheel which is adjustable to compensate for various loads carried on the trailer and is formed in a manner such that wind acting on the top of the trailer acts to urge the trailer downwardly to thus stabilize the trailer when in use.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: June 7, 1977
    Inventors: Edward L. Hawes, Allen R. Hawes, Edward C. Hawes