Lubricating Patents (Class 112/256)
  • Patent number: 9494240
    Abstract: A valve assembly for a dispenser for fluids including: a housing having at least an inlet opening and an outlet opening and a further opening connected or connectable to a fluid displacement mechanism, and a valve member including two parts translatably disposed within the housing, a first part for closing and opening the inlet and a second part for opening and closing the outlet.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: November 15, 2016
    Assignee: Fast & Fluid Management B.V.
    Inventor: Marcus Johannes Voskuil
  • Patent number: 8028635
    Abstract: A needle bar supported in a head unit is connected with a needle bar lever extending from the inside of a sewing machine arm and the needle bar is moved up and down by swing of the needle bar lever about a supporting shaft generated by transmission from a sewing machine main shaft. The sewing machine arm and the head unit are fluid-tightly shielded by a shield plate, and a first sealing part is provided in the shield plate. The first sealing part supports the needle bar lever by fitting a portion of the needle bar lever into seal plates held between a presser plate and a back face of a seal support having a curved shape of a circular arc taken along a swinging locus of the needle bar lever. The inside of the sewing machine arm is oil-lubricated, and the inside of the head unit is grease-lubricated.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: October 4, 2011
    Assignee: Yamato Mishin Seizo Kabushiki Kaisha
    Inventors: Yasuo Kanegawa, Toshiro Mitsuji
  • Patent number: 7820606
    Abstract: A lubricant for sewing machines to be supplied to lubricate a movable part of a sewing machine is formed by using, as main components, a plurality of kinds of synthetic esters combined to have consistency within a range of grade 2 to grade 000 (defined by the NLGI (National Lubricating Grease Institute)) under a temperature of 25° C., and a melting point within a range of 70° C. to 150° C.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: October 26, 2010
    Assignee: Yamato Mishin Seizo Kabushiki Kaisha
    Inventors: Takashi Mizusaki, Seiji Hashimoto, Masato Okabe
  • Patent number: 6912964
    Abstract: In an upper looper holder guide 7 through which an upper looper holder 12 penetrates, a first oil discharge hole 27 is opened in the edge at the upper end of a through-hole 11 and a second oil discharge hole 28 opened in the groove 26 and are branched off, the opening of the first oil discharge hole 27 contacts with the upper looper holder 12, and the opening of the second oil discharge hole 28 and groove 26 are exposed from a longitudinal hole 6 of an upper looper base 4 when the upper looper holder 12 reaches the top dead center or the bottom dead center. The oil discharge device is composed of a two-layer trochoid pump.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: July 5, 2005
    Assignee: Pegasus Sewing Machine Mfg. Co., Ltd.
    Inventor: Takashi Kasuda
  • Publication number: 20040118329
    Abstract: In an upper looper holder guide 7 through which an upper looper holder 12 penetrates, a pass hole 25 opened in a spot facing 24, and a groove 26 parallel to the pass hole 25 on the outer circumference of the upper looper holder guide 7 are formed. From the pass hole 25, a first oil discharge hole 27 opened in the edge at the upper end of a through-hole 11 and a second oil discharge hole 28 opened in the groove 26 are branched off, the opening of the first oil discharge hole 27 contacts with the upper looper holder 12, and the opening of the second oil discharge hole 28 and groove 26 are exposed from a longitudinal hole 6 of an upper looper base 4 when the upper looper holder 12 reaches the top dead center or the bottom dead center.
    Type: Application
    Filed: December 10, 2003
    Publication date: June 24, 2004
    Inventor: Takashi Kasuda
  • Patent number: 6112681
    Abstract: A tufting machine has a head, including a plurality of push rods reciprocably driven through push rod seals having a housing connected to the head of the tufting machine. The push rod seals include a driver connected to and moveable relative to the housing, a stack of oil seals is located between the driver and a ledge within the housing. A pressure bearing is located between the oil seals and the housing and the driver respectively. The push rod seal system allows for reciprocatory movement of the push rods therethrough while preventing oil leakage past a reciprocating push rod.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: September 5, 2000
    Inventor: W. Clifford Adcox
  • Patent number: 5676076
    Abstract: An improved thread conditioning device for use as an accessory to conventional sewing machines. Included are a rectangular baseplate with a pair of upstanding projections. One of the projections near the rear portion of the plate extends upwardly and at its extremity has two essentially right angle bands so as to adapt it for swivelably supporting a small platform having two parallel major surfaces on one of which there is fixed a specially shaped adapter having a plurality of different sized cylindrical recesses for receiving any one of a corresponding plurality of different diameter supports. On the other major surface there is affixed a conditioning pad with a pair of thread guides to guide thread into contact with and past an exposed surface of the conditioning pad for use in tensioning and/or lubricating thread. Optimally included are an additional spool holder mounted on a turn-table and a lubricant reservoir for supplying lubricant to the pad.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: October 14, 1997
    Inventor: Pamela Bryant Burke
  • Patent number: 5651323
    Abstract: A hook assembly includes a bearing rib on a bobbin case basket or at least a surface layer thereof composed of a synthetic resin, such as a liquid crystal polymer, which has properties such that the amount of the rotating friction generated between such surface layer and an inner surface layer of a groove shaped bearing raceway in which the bearing rib is fitted is lower, with no industrial sewing machine oil therebetween than such industrial sewing machine oil where to be provided therebetween. The hook assembly thus has good durability without any lubrication being provided. Accordingly, oil staining of threads and sewing materials by a lubricant is avoided, and sewing quality is enhanced.
    Type: Grant
    Filed: February 17, 1995
    Date of Patent: July 29, 1997
    Assignee: Hirose Manufacturing Co., Ltd.
    Inventors: Tokuzo Hirose, Kiyoshi Nakamura
  • Patent number: 5549063
    Abstract: A sewing machine having a substantially U-shaped structure includes a bed section, a barrel section connected to the bed section in a substantially perpendicular fashion, and a bracket connected to the arm barrel section in a substantially perpendicular fashion and extended substantially parallel to the bed section. The bracket includes an opening at an upper surface of the bracket and an arm cover engageable with the upper surface of the bracket for closing the arm opening. The arm cover is substantially flush with the upper surface of the bracket when engaged with the upper surface.
    Type: Grant
    Filed: July 5, 1995
    Date of Patent: August 27, 1996
    Assignee: Juki Corporation
    Inventors: Shigemasa Kato, Takayuki Shiina
  • Patent number: 5546877
    Abstract: A method and device is provided for adhesively securing a fabric in place relative to a sewing needle and thread of a sewing machine while applying an image to the fabric. The device replaces the conventional hoop-like device and includes a place to which the fabric to be sewn is adhesively attached. A kit is provided which provides the user with all of the elements required to use the device and a lubricating device is provided for lubricating the needle and/or thread.
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: August 20, 1996
    Assignee: Mutual Holdings Inc.
    Inventor: Leo M. Moore
  • Patent number: 5546879
    Abstract: A lint barrier for a sewing machine which excludes lint from entering the interior of the sewing machine having a machine housing enclosing the internal workings of the machine. The sewing machine also includes an oil cooler adapted to cool oil circulating through the sewing machine, the cooler including a plenum, a radiator and an air source for moving air through the radiator. A conduit connects the air source to the interior of the sewing machine, whereby air is conducted through the conduit and into the interior of the sewing machine to maintain a positive pressure within the sewing machine interior, thereby preventing the entry of lint into the sewing machine interior.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: August 20, 1996
    Assignee: Sara Lee Corporation
    Inventors: John McEwen, David Tolzman, Anthony DiDonato
  • Patent number: 5454338
    Abstract: A lint barrier for a sewing machine which excludes lint from entering the interior of the sewing machine having a machine housing enclosing the internal workings of the machine. The sewing machine also includes an oil cooler adapted to cool oil circulating through the sewing machine, the cooler including a radiator and an air source for moving air through the radiator. A conduit connects the air source to the interior of the sewing machine, whereby air is conducted through the conduit and into the interior of the sewing machine to maintain a positive pressure within the sewing machine interior, thereby preventing the entry of lint into the sewing machine interior.
    Type: Grant
    Filed: July 14, 1994
    Date of Patent: October 3, 1995
    Assignee: Sara Lee Corporation
    Inventors: John McEwen, David Tolzman, Anthony DiDonato
  • Patent number: 5431118
    Abstract: A dry sewing machine, or a sewing machine which can be operated without oiling. The machine of the preferred embodiment is particularly adapted for making a type 401 two thread chain stitch, used in commercial sewing operations. In addition to employing sealed bearings, novel spreader and rocker frame assemblies are employed.
    Type: Grant
    Filed: August 12, 1994
    Date of Patent: July 11, 1995
    Assignee: James Cash Machine Co., Inc.
    Inventor: David R. Cash
  • Patent number: 5180035
    Abstract: An oil pump assembly having an adjustable gear hub assembly enclosed within a housing, which assembly includes a a spur gear for driving two independent gear pumps, a gear hub and an adjusting sleeve for adjusting the position of and securing the spur gear, elastically deformable oil seal rings fitting on either side of the gear hub for ensuring a tight fit of the components within the assembly and washers fitting outwardly of the oil seal rings each equipped with a "dog" for engaging the revolving spur gear. The oil pump assembly may also be provided with coverplates, one or both of which contain improved bypass channels that serve to meter the oil in the assembly so as to prevent oil leakage, while also maintaining a supply of oil in the pump assembly so as to prevent friction build up upon starting of the sewing machine.
    Type: Grant
    Filed: November 22, 1991
    Date of Patent: January 19, 1993
    Assignee: Union Special Corporation
    Inventor: Robert Gaudlitz
  • Patent number: 5170732
    Abstract: A bobbin comprises a hollow hub adapted to cooperate with a latch and post on a bobbin casing housed in a sewing machine. The latch and post enter the hub and guide the bobbin into place in the sewing machine. Thread previously wound around the hub is adapted for paying out for use in the sewing machine. Before the bobbin is inserted for use in the sewing machine, a membrane is placed across the hub at one axial end to seal that end and form a reservoir within the hub, and a lubricant such as sewing machine oil is added to the reservoir. Another membrane is placed across the hub at the other axial end of the hub to seal that end and completely seal the oil within the reservoir. When the bobbin is inserted into the bobbin casing, the latch punctures both membranes, the post guides the bobbin so that it is properly seated within the bobbin casing, and the sewing machine oil contained in the reservoir drains out and lubricates the sewing machine.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: December 15, 1992
    Inventor: Herbert G. Gordon
  • Patent number: 5117773
    Abstract: A lubrication device for a rotating hook in a sewing machine, having a hook shaft provided with a hollow interior axially thereof, an inlet and an outlet communicating with the hollow interior for prevention of oil pressure build-up therein as oil is supplied from an oil reservoir, a restriction between the inlet and the outlet for decreasing the diametrical extent of the hollow interior, and a closure for one end of the hollow interior provided with an oil supply channel communicating with the hollow interior, the oil supply channel having an axis positioned either eccentrically or concentrically of a longitudinal axis of the hook-shaft and an insert part to prevent the porous material from resting at the bottom of the interior of the hook-shaft, when the machine is stopped.
    Type: Grant
    Filed: October 12, 1990
    Date of Patent: June 2, 1992
    Assignee: The Reece Corporation
    Inventors: Reinhold G. Papajewski, Donald M. Millett
  • Patent number: 5099774
    Abstract: An oil pump assembly having an adjustable gear hub assembly enclosed within a housing, which assembly includes a spur gear for driving two independent gear pumps, a gear hub and an adjusting sleeve for adjusting the position of and securing the spur gear, elastically deformable oil seal rings fitting on either side of the gear hub for ensuring a tight fit of the components within the assembly and washers fitting outwardly of the oil seal rings each equipped with a "dog" for engaging the revolving spur gear. The oil pump assembly may also be provided with coverplates, one or both of which contain improved bypass channels that serve to meter the oil in the assembly so as to prevent oil leakage, while also maintaining a supply of oil in the pump assembly so as to prevent friction build up upon starting of the sewing machine.
    Type: Grant
    Filed: September 7, 1990
    Date of Patent: March 31, 1992
    Assignee: Union Special Corporation
    Inventor: Robert Gaudlitz
  • Patent number: 5088427
    Abstract: An arrangement of two elements of a sewing machine which are in frictional, or sliding, contact during operation. At least one of elements is formed of a ceramic material and a minute amount of a lubrication oil is applied to the frictional, or siding, portion defining the surfaces in contact. Such a combination of elements is found in the upper looper mechanism, the shuttle body assembly, the needle bar mechanism and the fabric piece feeding mechanism in a sewing machine that are subject to high speed, high load friction or sliding conditions.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: February 18, 1992
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Atsuhiro Takagi, Mitsuru Muto, Jun Isono
  • Patent number: 5076182
    Abstract: A fully rotating hook includes an inner bobbin case, an outer loop taker mounted about the bobbin case, the loop taker having a track groove formed therein, a rotating member for rotating the loop taker such that relative rotation occurs between the loop taker and the bobbin case, and a stopper member for preventing rotation of the bobbin case with the loop taker while the loop taker is rotating. The track groove of the loop taker is formed by at least one wall therein which is coated with a layer of synthetic resin material having a small coefficient of friction to reduce friction between a track projection member on the bobbin case and the track groove of the loop taker.
    Type: Grant
    Filed: August 29, 1990
    Date of Patent: December 31, 1991
    Assignee: Hirose Manufacturing Co., Ltd.
    Inventors: Tokuzo Hirose, Hiromitsu Shimizu
  • Patent number: 5029545
    Abstract: An oil elimination device for a sewing machine comprising, a needle bar, a needle bar bushing having a channel to receive the needle bar, a collector plate having a bore to receive the needle bar, and a recess adjacent to the bore. The device has a porous member received in the recess, with the porous member being in contact with the bushing and spaced from the needle bar, and a device for applying a vacuum to the porous member.
    Type: Grant
    Filed: December 6, 1989
    Date of Patent: July 9, 1991
    Assignee: Union Special Corporation
    Inventor: Phounsavath Nanthavong
  • Patent number: 4809628
    Abstract: A device to stop lubricant flow in a sewing machine comprising, a housing having a lubrication chamber, and a feed dog carrier having a part projecting out of the lubrication chamber, a feed dog in the area of stitch formation of the sewing machine, and a sliding surface of said part with a step. The device has a sealing element for the feed dog carrier, and a device for driving the feed dog carrier.
    Type: Grant
    Filed: July 21, 1987
    Date of Patent: March 7, 1989
    Assignee: Union Special, GmbH
    Inventor: Johann O. Kleinschmidt
  • Patent number: 4779550
    Abstract: A looper drive for a chainstitch sewing machine comprising a rigid guide stud which is part of a support member for a looper shaft. The rigid guide stud is surrounded by a bushing which is swivably mounted on the guide stud. The guide stud as well as the bushing are provided with openings through which the looper shaft extends.
    Type: Grant
    Filed: August 31, 1987
    Date of Patent: October 25, 1988
    Assignee: Union Special G.m.b.H.
    Inventor: Wolf R. Von Hagen
  • Patent number: 4759303
    Abstract: A sewing machine presser foot lubrication system which includes apparatus to directly supply a lubricating fluid to the underside of a presser foot. The apparatus includes a small lubricant flow tube attached to a forwardmost underside portion of the presser foot. By such direct attachment of the lubricant flow line to the presser foot, a more effective lubricating function between the presser foot and a work piece is achieved. The apparatus further consists of a lubricant reservoir and the appropriate valving to control the lubricant flow rate therefrom. The flow tube is in two sections wherein a flexible second portion can be quickly disconnected from a rigid first portion which is integral with the presser foot.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: July 26, 1988
    Inventors: Jack S. Belsinger, John C. Smith
  • Patent number: 4715303
    Abstract: A lubricating device for a revolving lock stitch shuttle of machines such as sewing and embroidering machines comprises a shuttle body which has a hub portion which surrounds its associated shuttle arbor and which lies adjacent a bearing mounting for the arbor. The hub portion is hollow and defines a lubricating oil chamber between it and the associated bearing and a gap between the shuttle hub portion and the associated bearing is bridged by a fixed ring member which is carried on a bracket which is secured to the bearing. The ring member has an opening therethrough providing an access for a nozzle tube for feeding oil from an external reservoir to the hub recess from when the oil is advanced by the centrifugal force of the rotation of the shuttle to the periphery of the shuttle.
    Type: Grant
    Filed: June 3, 1986
    Date of Patent: December 29, 1987
    Assignee: Pfaff Industriemaschinen GmbH
    Inventors: Edgar Busch, Lothar Schilling, Klaus Ziegler
  • Patent number: 4671196
    Abstract: A fully rotating hook includes an outer member or rotary loop taker having a track groove therein and an inner shuttle member or bobbin case a projection extending into the groove. A spaced relation between the track groove and the projection is maintained by feeding compressed air into a clearance therebetween. The compressed air is fed through a plurality of air holes opening into the track groove to direct air jets to upper, lower and radially outermost surfaces of the projection on the bobbin case. Furthermore, the loop taker is rotated on a hollow shaft which has an air passage therethrough for feeding compressed air to the plurality of air holes which open into the track groove of the loop taker.
    Type: Grant
    Filed: October 2, 1985
    Date of Patent: June 9, 1987
    Assignee: Hirose Manufacturing Company Limited
    Inventor: Tokuzo Hirose
  • Patent number: 4587912
    Abstract: A apparatus is provided for creating and maintaining lubricant pressure and flow to various operative mechanisms disposed within the frame of the sewing machine independent of the sewing machine operation. To aid in the lubrication process, a lubricant heater is provided. The lubricant heater operates independent of the sewing machine operation and serves to warm or heat the lubricant to a preset temperature before it is communicated to the bearing surfaces of the operative mechanisms. The invention may further include a device disposed between the lubricant pump and heater for filtering the lubricant before it is delivered to the operative mechanisms of the machine.
    Type: Grant
    Filed: March 21, 1985
    Date of Patent: May 13, 1986
    Assignee: Union Special Corporation
    Inventors: James W. Wolff, Sandra J. Liakus
  • Patent number: 4577572
    Abstract: A fully rotating hook includes an outer member or rotary loop taker having a track groove therein and an inner shuttle member or bobbin case a projection extending into the groove. A spaced relation between the track groove and the projection is maintained by feeding compressed air into a clearance therebetween.
    Type: Grant
    Filed: March 16, 1984
    Date of Patent: March 25, 1986
    Assignee: Hirose Manufacturing Company Limited
    Inventor: Tokuzo Hirose
  • Patent number: 4572092
    Abstract: A sewing machine has a housing and a mechanism in the housing for actuating the sewing elements of the machine. The mechanism includes a rotating shaft with a drive end which protrudes from the housing and carries a handwheel. The handwheel has a surface which is proximate to the housing to provide a thin space between the surface and the housing. Wheel rotation during machine operation causes centrifugal movement of air in the space toward the circumference of the space. The wheel has openings which supply air to the space to cool the wheel and prevent the aspiration of fluids from the housing by the centrifugal movement of air in the space.
    Type: Grant
    Filed: September 21, 1983
    Date of Patent: February 25, 1986
    Assignee: The Merrow Machine Company
    Inventor: George B. Armstead, Jr.
  • Patent number: 4572093
    Abstract: A lubricating system for sewing machines is produced with the sewing machine running by cutting a predetermined amount of cotton fibers into small lengths and blowing the fiber lengths into the sewing machine housing. As the fibers fill the housing a felt cushion conformable to the paths of motion of the parts of the mechanism is produced. The felt cushion is supplied with oil through a wick.
    Type: Grant
    Filed: January 13, 1984
    Date of Patent: February 25, 1986
    Assignee: Pfaff Industriemaschinen GmbH
    Inventors: Herbert Wenz, Dietmar Becker
  • Patent number: 4545312
    Abstract: A tufting machine having a plurality of reciprocating push rods journally mounted in respective push rod housings carried by the head of the machine includes a sleeve having a sealing arrangement for preventing leakage of lubricant past the push rod housing onto the fabric produced. In one form the sleeve has a seal at the bottom, a circumferential groove disposed above the seal opening onto the push rod, and a pair of passageways communicating with the groove. Air may be blown through one passageway to pick up and carry oil from the groove back to the oil supply, or the two passageways may be connected to the inlet of an oil pump mounted in the head, or one passageway may be open to ambient while the other passageway includes a conduit which returns to the inlet of the pump. In the preferred form three seals are disposed within the sleeve vertically adjacent each other with the upper seal inverted relative to the lower two seals.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: October 8, 1985
    Assignee: Spencer Wright Industries, Inc.
    Inventor: Gary L. Ingram
  • Patent number: 4522136
    Abstract: The atmospheric pressure of lubricant containing cavities, from which leakage occurs, is lowered to a point below atmospheric pressure such that air from the environment is drawn thereinto. Since the air being drawn in occupies the passages through which lubricant leakage occurs, such leakage is effectively retarded.
    Type: Grant
    Filed: December 1, 1983
    Date of Patent: June 11, 1985
    Assignee: Union Special Corporation
    Inventors: James W. Wolff, James W. Ruedisueli, Ralph Schinke
  • Patent number: 4498406
    Abstract: A lubrication system for eccentric drives in a sewing machine wherein lubricant is fed through a hollow drive shaft and communicative radial ports. At its outlet end, the radial port is in fluid communication with a lubricant reservoir arranged on the eccentric's periphery. The lubricant reservoir being disposed on that portion of the eccentric's periphery measuring the greatest distance from the eccentric's rotating center.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: February 12, 1985
    Assignee: Union Special G.m.b.H.
    Inventor: Wolf R. Von Hagen
  • Patent number: 4487143
    Abstract: An improved self-oiling system for the drive shaft and feed dog assembly of a portable, bag-closing sewing machine utilizes a drive shaft having an internal axial oil channel, an upper radial oil bore which extends from the oil channel to the outer periphery of the shaft to confront the lower main drive shaft bearing, and a lower radial oil passage which extends between the oil channel and the outer periphery of a feed dog eccentric cam which is integral with the lower end of the drive shaft. Oil is supplied to the lower main drive shaft bearing for further downward distribution along the bore, channel and passage to the outer periphery of the feed dog cam which is rotatably received in the feed dog block. An oil passage within the feed dog block delivers oil from the feed dog cam radial oil passage to a slide bearing within the block to lubricate the interface between a guide post and the slide bearing. Annular recesses are provided on the shaft and post to further enhance transfer of oil within the machine.
    Type: Grant
    Filed: May 25, 1983
    Date of Patent: December 11, 1984
    Assignee: Axia Incorporated
    Inventor: Andrew J. Hiltner
  • Patent number: 4441442
    Abstract: A combined pump and oil reservoir and oil delivery apparatus directs oil to the internal chambers of a portable sewing machine where oil is distributed by pump pressure, gravity flow, capillary action, wicking, misting and movement of machine components. Oil is pumped into a manifold leading to upper and lower main drive shaft bearings and to the needle driving assembly for subsequent dispersion during rotation and reciprocation of machine parts to fling such oil outwardly within the internal chambers to oil machinery both directly and by misting.
    Type: Grant
    Filed: June 7, 1982
    Date of Patent: April 10, 1984
    Assignee: AXIA Incorporated
    Inventors: Robert J. Robinson, David B. Johnson, Verdell H. Schroeder
  • Patent number: 4419948
    Abstract: A needle bar bushing having a lubricant seal for reducing excess lubricant on the needle bar of a sewing machine. The lubricant seal includes a plurality of vertically aligned scraping portions including at least two similarily disposed conical scraping edges situated over a portion of the length of the needle bar bushing. The conical scraping edges being arranged in surrounding engagement with the needle bar for stripping and leading excess lubricant from the peripheral surface of the needle bar thus reducing the danger of lubricant working its way through the bushing and being thrown onto the work being sewn as a result of needle bar reciprocation.
    Type: Grant
    Filed: May 10, 1982
    Date of Patent: December 13, 1983
    Assignee: Union Special G.m.b.H.
    Inventor: Wolf R. von Hagen
  • Patent number: 4417534
    Abstract: The present invention relates to a device for monitoring fluid flow through a pressurized lubrication system. The device includes a reciprocally arranged indicator that is responsive to fluid pressures within the lubrication system for exteriorally indicating the lubricant flow as a function of the reciprocal position of the indicator.
    Type: Grant
    Filed: June 25, 1981
    Date of Patent: November 29, 1983
    Assignee: Union Special G.m.b.H.
    Inventors: Hermann Gauch, Wolf R. von Hagen
  • Patent number: 4393798
    Abstract: An internal housing comprises an upper part 1, a lower part 3 and a middle part 2. The middle part 2 connects the internal housing to an external housing 4 to form a rotary loop taker. The external housing 4 comprises an elastic piece 6 for engaging thread as well as a tail base 42 and an internally tapered ring 5 for fitting the loop taker into a sewing machine. The middle part 2 provides a ring about which the external housing 4 is rotatable, and to facilitate this rotation, this middle part is of or coated with Teflon.
    Type: Grant
    Filed: September 29, 1980
    Date of Patent: July 19, 1983
    Inventor: Haw-Lin Cheng
  • Patent number: 4381722
    Abstract: In a sewing machine having a presser foot and a pressure imparting member for applying a downward pressure to the presser foot, there is disposed, in an inner chamber of a frame, an oil pump drivingly connected to a main shaft. The oil pump having an inlet port for drawing the oil from an oil reservoir and an outlet port for deliverying the oil under the pressure corresponding to the speed of the main shaft. Also a presser actuating device is provided between the oil pump and the presser foot and designed to apply an additional downward pressure to the presser foot by means of the oil from the outlet port so as to increase the downward pressure of the presser foot.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: May 3, 1983
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Toshikatu Takeuchi, Kihei Goto, Yasuro Ichihashi, Takenori Kawase
  • Patent number: 4350105
    Abstract: A looper lubricating device for a sewing machine includes an oil line having an inlet submerged within an oil supply and a capillary member within the oil line at a spaced location from the inlet and the oil supply. An outlet of the oil line is in fluid communication with an injection nozzle and the capillary member protrudes through the outlet of the oil line into a mixing chamber within the injection nozzle. A gas conduit communicating with the mixing chamber is operative to intermittently produce a pressure gradient between the inlet and the outlet of the oil line to pass oil to the mixing chamber.
    Type: Grant
    Filed: July 3, 1980
    Date of Patent: September 21, 1982
    Assignee: Pfaff Industriemaschinen GmbH
    Inventors: Ernst Albrecht, Reiner Hensel, Karl-Heinz Keller, Horst Stahlschmitt
  • Patent number: 4348970
    Abstract: A portable bag-closing sewing machine is provided with a self-oiling system which includes an oil reservoir connected to the machine and oil-delivery means to direct oil from the reservoir into the inner chambers of the machine where oil is distributed by gravity flow, capillary action and movement of machine components, the oil moving along through the machine components and through a series of channels, troughs, and reservoirs within the housing to distribute oil throughout the machine. During operation, the rotating and reciprocating machine parts fling oil outwardly within the chambers to directly oil machine assemblies and to create a fine mist of oil throughout the chambers so as to further lubricate machine components. Also disclosed is an improved and self-lubricating feed dog assembly and thread chain cutting device.
    Type: Grant
    Filed: April 1, 1980
    Date of Patent: September 14, 1982
    Assignee: Bliss & Laughlin Industries, Incorporated
    Inventors: Robert J. Robinson, David B. Johnson, Verdell H. Schroeder
  • Patent number: 4284019
    Abstract: A lubricant sealing element for the slide members which actuate the feed dogs in a sewing machine fabricated from a resilient wear resistant material and having lubricant scraping surfaces formed by spaced walls defining an opening conforming in size to the cross-sectional configuration of the slide members and through which the latter extend. The sealing element is mounted for sliding movement restricted to the alternate vertical movement of the slide members and the spaced walls are of a thickness approximately one third the thickness of the remainder of said element which permits them to yield first in one direction and then the other with the alternate horizontal movement of the slide members.
    Type: Grant
    Filed: July 24, 1980
    Date of Patent: August 18, 1981
    Inventor: Franco Marchesi
  • Patent number: 4245575
    Abstract: This disclosure relates to a sewing machine lubrication system including positive displacement mechanisms adapted to transmit lubricant under pressure to the operating mechanisms of the machines and for transferring lubricant collected in non-drainable areas of the machine to the lubricant reservoir. Arranged in combination with the displacement mechanisms is a filtering/distribution assembly which serves to individually and selectively supply a relatively small, but sufficient quantity of lubricant to the operating mechanisms according to the requirements thereof. The present invention further provides a pressure relief valve assembly for selectively regulating the pressure in the lubrication system.
    Type: Grant
    Filed: July 16, 1979
    Date of Patent: January 20, 1981
    Assignee: Union Special Corporation
    Inventors: James C. Hsiao, Yoichiro Ishikawa
  • Patent number: 4122789
    Abstract: A sewing machine includes a housing having an oil pan portion defining an oil reservoir with a filter supported on a wall of the sewing machine housing in a position above the reservoir. A pump is employed to direct the lubricating oil upwardly through a pipe connection into the top of the filter and a portion of the oil which is pumped is circulated through a small size tube in a continuous manner such that it is deflected against a viewing glass at the top of the sewing machine and drops down into the operating mechanism contained in the sewing machine housing. In addition, a portion of the oil which is pumped into the filter passes through a removable filter cartridge and into the interior of the filter.
    Type: Grant
    Filed: December 7, 1977
    Date of Patent: October 31, 1978
    Assignee: Pfaff Industriemaschinen GmbH
    Inventor: Kurt Klundt
  • Patent number: 4095541
    Abstract: A sewing machine having a modular oil reservoir attached to the frame and having a wick disposed above the lubricant level with one end abutting a wall of the reservoir and relies for its wetting upon the vibratory action of the machine during its operation. Normal machine operating vibration causes the lubricant to wet the walls of the reservoir and through capillary action the wick is wetted to supply lubricant to the needle bar and take up mechanism. This serves to supply relatively small but sufficient quantity of lubricant for lubricating purposes and when the machine is shut off, since the wick is not immersed in lubricant, no lubricant is fed through the system.
    Type: Grant
    Filed: April 14, 1977
    Date of Patent: June 20, 1978
    Assignee: The Singer Company
    Inventors: Earl Francis Dunn, Adolph Armer Gebhardt
  • Patent number: 4079685
    Abstract: A sewing machine, comprises a sewing machine head with a needle bar bushing supported in the head and a needle bar engaged in the bushing for upward and downward axial movement. The sewing machine includes an oil pan below the head and a scraping wick is engaged around the bar in the bushing and bears against a reabsorbing wick which extends from the scraping wick to the oil pan. The head is advantageously provided with a head cover which covers a recess having a pad which engages against the reabsorbing wick and biases it into contact with the scraping wick. In addition, the construction includes an additional wick which extends in an axial direction from a location above the scraping wick to a location at the lowermost end of the bushing and it is located between separated ends of the scraping wick and provides an oil-conducting connection with the scraping wick.
    Type: Grant
    Filed: June 24, 1977
    Date of Patent: March 21, 1978
    Assignee: Pfaff Industriemaschinen GmbH
    Inventor: Kurt Klundt
  • Patent number: 4075960
    Abstract: A sewing machine includes a housing located below a reciprocating needle which contains two feed supports which are driven by operating mechanism so that they move through a substantially rectangular course of motion in their own plane. The feed supports include elongated members which extend through an opening in a front wall of a base of the sewing machine, and this wall is substantially closed against the outward splashing of oil by a first gasket which is engaged over the two support members which operate alongside each other and it is mounted so that it moves vertically to accommodate the vertical movement of the members. A second seal is effected by U-shaped sealing elements which engage over respective feed supports from respective opposite sides inwardly so that when the two supports are in alignment, the sealing members form a complete encirculing web.
    Type: Grant
    Filed: June 24, 1977
    Date of Patent: February 28, 1978
    Assignee: Pfaff Industriemaschinen GmbH
    Inventor: Kurt Klundt
  • Patent number: 4073251
    Abstract: A lubricating arrangement for the raceway of the bobbin case of a rotary sewing machine looptaker having a body with a recess formed by a bottom and a substantially cylindrical sidewall for holding the bobbin case. A hub of the looptaker has an oil collecting chamber in the form of an annular cavity with undercut inside peripheral area. The chamber receives oil supplied from an oil collecting sump. Centrifugal action causes the oil to flow through a conduit located between the oil collecting chamber and the bottom of the recess, via an adjusting device, to the raceway for the bobbin case. For regulating the oil delivery, the conduit is surrounded along a portion of its length by a borehole located in the bottom. An adjusting screw is provided for tilting the conduit in relation to the axis of the loop taker. An oil collecting sump closed by a cover, is in the bottom of the looptaker body. Oil is supplied to the oil collecting sump through a hollow looptaker shaft.
    Type: Grant
    Filed: March 24, 1977
    Date of Patent: February 14, 1978
    Assignee: Kochs Adler AG
    Inventor: Reinhold Schrudde
  • Patent number: 3981257
    Abstract: A shaft driven overedge sewing machine is lubricated by a pump mounted on a driven shaft which supplies lubricating oil from the machine's sump through an oil passage in the pump mounting shaft. The pump body is mounted for free rotation relative to the shaft and normally retained against rotation, upon rotation of the shaft, and a spring pressed plunger carried by the pump body cooperates with an eccentric cam surface on the shaft to pump oil from the machine sump into the oil passage in the driven shaft to lubricate shaft bearings and the like.
    Type: Grant
    Filed: December 30, 1974
    Date of Patent: September 21, 1976
    Inventor: Edward A. Kelly
  • Patent number: RE32809
    Abstract: A fully rotating hook .[.includes an outer member or rotary loop taker having a track groove therein and an inner shuttle member or bobbin case a projection extending into the groove. A spaced relation between the track groove and the projection is maintained by feeding compressed air into a clearance therebetween..]. .Iadd.assembly for a lock stitch sewing machine having an inner bobbin case for supporting a thread bobbin with a track projection extending circumferentially around the bobbin case, an outer loop taker mounted about the bobbin case and having a track groove extending circumferentially around an inner peripheral surface thereof and air passages for injecting compressed air into a clearance between adjacent surfaces of the projection and the groove. The air passages can be formed in the groove of the loop taker and in the projection.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: December 27, 1988
    Assignee: Hirose Manufacturing Company Limited
    Inventor: Tokuzo Hirose
  • Patent number: RE33382
    Abstract: A combined pump and oil reservoir and oil delivery apparatus directs oil to the internal chambers of a portable sewing machine where oil is distributed by pump pressure, gravity flow, capillary action, wicking, misting and movement of machine components. Oil is pumped into a manifold leading to upper and lower main drive shaft bearings and to the needle driving assembly for subsequent dispersion during rotation and reciprocation of machine parts to fling such oil outwardly within the internal chambers to oil machinery both directly and by misting.
    Type: Grant
    Filed: April 8, 1986
    Date of Patent: October 16, 1990
    Assignee: AXIA Incorporated
    Inventors: Robert J. Robinson, David B. Johnson