US3656358A - Linear positioning devices and the like - Google Patents

Linear positioning devices and the like Download PDF

Info

Publication number
US3656358A
US3656358A US38792A US3656358DA US3656358A US 3656358 A US3656358 A US 3656358A US 38792 A US38792 A US 38792A US 3656358D A US3656358D A US 3656358DA US 3656358 A US3656358 A US 3656358A
Authority
US
United States
Prior art keywords
screw
fingers
rod
nut
teeth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US38792A
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English (en)
Inventor
Norman L Kopp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unitron Inc USA
Original Assignee
Warner Electric Brake and Clutch Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Warner Electric Brake and Clutch Co filed Critical Warner Electric Brake and Clutch Co
Application granted granted Critical
Publication of US3656358A publication Critical patent/US3656358A/en
Assigned to DANA CORPORATION reassignment DANA CORPORATION MERGER (SEE DOCUMENT FOR DETAILS). VIRGINIA, EFFECTIVE DECEMBER 31, 1986. Assignors: WARNER ELECTRIC BRAKE & CLUTCH COMPANY
Anticipated expiration legal-status Critical
Assigned to UNITRON INCORPORATED reassignment UNITRON INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DANA CORPORATION
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/2003—Screw mechanisms with arrangements for taking up backlash
    • F16H25/2009—Screw mechanisms with arrangements for taking up backlash with radial preloading
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/924—Coupled nut and bolt
    • Y10S411/929—Thread lock
    • Y10S411/937—Distorted nut
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/19698—Spiral
    • Y10T74/19702—Screw and nut
    • Y10T74/19721—Thread geometry
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/19698—Spiral
    • Y10T74/19702—Screw and nut
    • Y10T74/19805—Less than 360 degrees of contact between nut and screw
    • Y10T74/19809—Independent nut segments
    • Y10T74/19814—Integral deformable tangs engaging screw

Definitions

  • a collar telescoped over and adapted to be translated back and forth relative to an elongated rod includes cantilevered 'fingerswhich are resiliently wedged into angularly spaced 1 grooves formed in the rod to preload the collar onto the rod and to prevent rotational play from developing between the two.
  • the collar is telescoped onto a rod in the form of a splined shaft while, in another embodiment, the collar is a nut which is threaded onto a screw with multiple threads.
  • the primary aim of the present invention is to provide a positioning device of the above character having a new and improved collar which is especially advantageous for use in conjunction with a comparatively inexpensive rod having multiple grooves and which, at the same time, is preloaded resiliently onto the rod to reduce rotational play between the teeth and the grooves and to automatically take up the play as the teeth and grooves become worn duringnorrnal service use.
  • the invention resides in the provi sion of a new and improved collar in which at least part of the teeth are in the form of cantilevered fingers which are resiliently urged into wedging engagement with the sidesof the grooves in the rod to maintain a substantially lash-free fit between the teeth and the grooves.
  • the in- One embodiment of the in-.
  • vention is particularly characterized bythe formation of the fingers and the grooves in the rod on the same helix angle so as to adapt the collar for use with a rod having multiple threads.
  • FIG. 1 is a fragmentary perspective view of one embodiment of a new and improved positioning device incorporating the novel features of the present invention.
  • FIGS. 2 and 3 are enlargedcross-sectional views taken substantially along the lines 2-2 and 3-3, respectively, of FIG. 1
  • FIG. 4 is an enlarged fragmentary cross-section taken sub stantially along the line 4-4 of FIG. I and showing one of the fingers of the collar prior to final assembly of the positioning device.
  • FIG. 5 is a view similar to FIG. 4 but showing the finger in a deflected position after final assembly of the positioning device.
  • FIG. 6 is a cross-section somewhat similar toFIG. 4 but showing a modified collar.
  • FIG. 7 is a fragmentary side elevation of a device with still another type of collar.
  • FIG. 8 is a fragmentary perspective view of another embodiment of a positioning device incorporating the novel features of the invention.
  • FIG. 9 is a fragmentary side elevation of still another embodiment of a positioning device.
  • FIG. 10 is an enlarged fragmentary cross-section taken substantially along the line 10-10 of FIG. '9.
  • FIG. 11 is a fragmentary perspective view showing the inner side of one of the fingers of the collar illustrated in FIG. 9.
  • the invention is embodied in a linear positioning device in which an elongated threaded rod or screw 10 is threaded into a collar in the form of a nut 11 such that, upon relative rotation between the two, the nut is translated back and forth relative to the screw.
  • the nut is clamped rigidly to positioning a movable carriage 13 (FIG. 2) by a strap 14 and moves the carriage back and forth along the screw as the latter is rotated so as to position the carriage along a fixed bed (not shown) which rotatably supports the screw.
  • the screw 10 is of the type having multiple threads, herein five, extending along its length and all formed at the same helix angle by a comparatively simple and inexpensive rolling process.
  • the threads are spaced angularly from one another and are defined by outwardly tapered spiraled teeth 16 (FIG. '2) which are separated by grooves 17 with rounded bottoms.
  • the nut 11 includes a generally cylindrical body 19 made of resiliently yieldable plastic material such as nylon'and' formed with a central internal passage molded with the same number of threads as the screw, the threads of the nut being defined in part by angularly spaced teeth 21 (FIG.
  • the nut 11 while being especially adapted for use with a multiple threaded screw 10 of the above character, is constructed so as to be capable of being preloaded resiliently onto the screw to reduce rotational backlash betweenthe nut and the screw and to maintain a substantially lash-free condition even as the nut and screw become worn as an incident to normal service use.
  • the nut is formed with a series of cantilevered fingers 25 which constitute part of the threads of the nut and which are resiliently wedged into the grooves 17 of the screw.
  • the nut 11 herein comprises five fingers 25, one for each of the threads on the screw 10, and each is molded integrally with one end of the body 19 of the nut.
  • the fingers project cantilever fashion from one end of the body and are separated from one another by slots-26 (FIG. 3) extending radially through the nut.
  • slots-26 FIG. 3
  • the fingers 25 and the slots 26 are spiraled a partial revolution around the nut at the same helix angle as the teeth 16 and grooves 17 of the screw threads and thus each finger projects into one of the grooves while each slot registers with one of the teeth.
  • each finger 25 are tapered inwardly and are sized to fit closely against the sides of the teeth 16 of the screw 10, the inner ends of the fingers being rounded to conform to the shape of the bottoms of the grooves 17.
  • the inner ends of the slots 26 and the outer ends of the teeth 16 are equal in width so that the teeth may project outwardly into the slots.
  • the fingers are capable of being wedged into interfitting engagement with the teeth with the adjacent side surfaces of the teeth and the fingers in full face-to-face contact.
  • a garter spring 27 fitted in a circumferential groove 29 formed around the free end portions of the fingers contracts the latter inwardly and causes the fingers to deflect relative to the body 19 as shown in FIG. 5.
  • the fingers are urged resiliently into the grooves and, by virtue of the wedging action, seat against the sides of the screw teeth 16 to substantially eliminate rotational play between the screw 10 and the nut 11 and to maintain the displacement accuracy of the nut for a given increment of rotation of the screw.
  • the present invention brings to the art an anti-backlash nut 11 which is particularly advantageous for use with a multi-threaded screw 10 capable of being manufactured by a simple rolling operation and, in relation to its size, capable of driving heavy loads.
  • the cantilevered fingers 25 are continuously urged inwardly into the grooves 17 by the spring 27 forcing the fingers in the direction of the arrows shown'in FIG. 3 so that, as wear occurs, the fingers are contracted further to automatically take up any looseness between themselves and the teeth 16, such wear decreasing as the fingers gradually seat themselves fully in the grooves during an initial break-in period following installation of the nut on the screw.
  • the axis of the nut remains substantially centered on the axis of the screw because the fingers are uniformly loaded and tend to wear evenly around the full 360 circumference of the nut. If the load driven by the nut is so heavy as to tend to unwind the spiraled fingers, the loading on the nut shifts to the teeth 21 within the body 19 while the fingers continue to maintain the nut in a preloaded condition on the screw.
  • a slightly modified nut 11' is shown in FIG. 6 and is adapted to be preloaded onto a screw without need of a separate spring.
  • the inner sides 30 of the fingers 25' are gradually tapered from the body 19' toward the free ends of the fingers so that, in effect, an axially tapered passage 31 is formed between the fingers.
  • the diameter a of the passage near the free ends of the fingers is slightly less than the root diameter b of the screw as shown in full lines in FIG. 6.
  • the nut shown in FIG. 6 is capable of attaining all of the advantages of that shown in FIGS. 1 to while avoiding the need for a separate spring for contracting the fingers.
  • Still another nut 40 is shown in FIG. 7 and in this instance, is a double nut formed with sets of fingers 41 and 43 integral with and projecting from opposite ends of an internally threaded body 44.
  • the fingers are preloaded onto the screw by garter springs 45 and, being located at opposite ends of the body, restrict cocking of the body on the screw as well as producing the same friction regardless of the direction of rotation of the screw.
  • FIG. 8 illustrates another device constructed in accordance with the principles of the invention.
  • a nylon collar 50 is telescoped onto a rod in the form of a splined shaft 51 and is adapted to be translated back and forth relative to the shaft and to rotate in unison with the shaft.
  • the collar 50 may be power-rotated to turn the shaft while leaving the latter free for sliding axially through the collar.
  • the shaft 51 comprises a series of angularly spaced teeth 53 and grooves 54 extending axially along the shaft with zero lead and mating with similarly extending teeth and grooves (not visible) formed within the body 55 of the collar.
  • Integral with and projecting from the collar are cantilevered fingers 56, one for each groove 54, of wedge-shaped cross-section and separated from one another by straight axially extending slots 57.
  • the fingers are contracted by a garter spring 59 and thus are resiliently wedged into the grooves to preload the collar onto the shaft and reduce rotational play between the two.
  • FIGS. 9 to 11 Another type of positioning device is shown in FIGS. 9 to 11 and comprises a nylon collar or nut 60 having a body 61 which is formed with internal threads like the body 19 of the first embodiment and which is threaded onto a multiple threaded screw 10.
  • Angularly spaced fingers 63 separated by slots 64 project cantilever fashion from the body 61 but, instead of being spiraled in accordance with the screw threads, are straight like the fingers 56 and extend axially along the screw.
  • the inner side of each finger is formed with a series of notches 65 spiraled at the same helix angle as the screw threads and spaced axially along the finger with the same pitch as the screw threads so that the latter mate with and fit into the notches.
  • the notches are formed with an outwardly tapered cross-section and are separated by inwardly tapered teeth 66 which are urged into wedging engagement with the sides of the screw threads by a garter spring 67 contracted around the free end portions of the fingers.
  • the wedging action thus produced takes up play between the nut and the screw. Because the fingers 63 do not follow the helix angle of the screw threads, the nut 60 is in some respects easier to manufacture than the nut 11 of the first embodiment but does not experience as long a life since the notches 65 will eventually bottom against the crests of the screw threads as wear occurs after extended service use.
  • a positioning device the combination of, a screw having a plurality of threads all spiraled at the same helix angle, and a plastic nut having a body with the same number of threads as said screw and spiraled at the same helix angle whereby the nut may be threaded onto the screw, said nut including a plurality of angularly spaced spring fingers each extending from said body and each having one end integral with and cantilevered on one end of the body, there being one finger for each thread of said screw with each finger being spiraled at the same angle as the helix angle of the screw threads and making a partial revolution around the screw whereby the fingers mate with the screw threads, said fingers resiliently engaging the threads of said screw to take up rotational lash between the nut and the screw.
  • a positioning device as defined in claim 2 in which said fingers are separated by angularly spaced slots spiraled at the same helix angle as the fingers and receiving said screw threads.
  • a positioning device as defined in claim 1 further including a garter spring contracted around the free end portions of said fingers and resiliently urging the latter against the screw threads.
  • a positioning device as defined in claim 1 in which fingers define a central passage and are tapered along their inner sides from said body toward their free ends such that the diameter of said passage near the free ends of the fingers is less than the root diameter of said screw prior to threading of said nut onto said screw, said fingers flexing outwardly relative to said body as an incident to the threading of said nut onto said screw.
US38792A 1970-05-19 1970-05-19 Linear positioning devices and the like Expired - Lifetime US3656358A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3879270A 1970-05-19 1970-05-19

Publications (1)

Publication Number Publication Date
US3656358A true US3656358A (en) 1972-04-18

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US38792A Expired - Lifetime US3656358A (en) 1970-05-19 1970-05-19 Linear positioning devices and the like

Country Status (6)

Country Link
US (1) US3656358A (de)
JP (1) JPS577888Y2 (de)
CH (1) CH541094A (de)
DE (1) DE2124700C3 (de)
FR (1) FR2090125B1 (de)
GB (1) GB1286608A (de)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3793896A (en) * 1972-09-06 1974-02-26 Numicon Inc Incremental linear positioning apparatus
US3945481A (en) * 1974-05-08 1976-03-23 Teletype Corporation Resiliently mounted drive nut and carriage assembly
US4210033A (en) * 1977-07-19 1980-07-01 Kerk Motion Products, Inc. Anti-backlash nut
WO1986000110A1 (en) * 1984-06-11 1986-01-03 Renee William C Operator for venetian blinds and combination operator and venetian blind
USRE32433E (en) * 1978-07-17 1987-06-09 Kerk Motion Products, Inc. Anti-backlash nut having longitudinal flexural members with ramps thereon and means to apply an axial pre-load force to said ramps
US4977788A (en) * 1988-03-09 1990-12-18 E.C.H. Will Gmbh Apparatus for adjusting the positions of components in machines
US5117701A (en) * 1989-11-14 1992-06-02 Gec Alsthom Sa Screw-and nut type member for transmitting rotary motion
US5199169A (en) * 1991-12-23 1993-04-06 Thomson Saginaw Ball Screw Company, Inc. Methods of making recirculating ball nut and splined shaft and screw assemblies
US5388475A (en) * 1993-09-15 1995-02-14 Beaver Precision Products Ball nut and method of manufacturing same
US5448438A (en) * 1993-11-09 1995-09-05 Quantum Corporation Head actuator having spring loaded split nut
US5562293A (en) * 1994-06-25 1996-10-08 Greene, Tweed Of Delaware, Inc. Stripping ring
US6053064A (en) * 1998-05-01 2000-04-25 L & P Property Management Company Lumbar support screw actuator
US20080089621A1 (en) * 2006-10-17 2008-04-17 Scott Edward Barry Bushing assembly for reducing backlash
GB2458991A (en) * 2008-04-09 2009-10-14 Isotek Electronics Ltd Mechanical linear actuator with zero backlash
US20090288507A1 (en) * 2003-10-23 2009-11-26 Toti Andrew J Control rod mechanism and system
US8205658B1 (en) * 2011-02-28 2012-06-26 Shih-Ming Lin Operating device for rotating a winding roller of a window blind
EP2607749A3 (de) * 2011-12-23 2014-04-02 Pacific Bearing Company Mutter mit flexiblen Fingern und radialen Druckelementen
US9010205B2 (en) 2011-01-20 2015-04-21 Pacific Bearing Company Linear slide having integral carriage and nut assembly
US9080655B2 (en) 2011-07-18 2015-07-14 Nook Industries, Inc. No-lash nut assembly
US9303742B2 (en) 2011-11-28 2016-04-05 Pacific Bearing Company Inverted spline rail system
US9334937B2 (en) 2013-07-03 2016-05-10 Pacific Bearing Company Floating nut and carriage assembly
CN106808280A (zh) * 2015-12-02 2017-06-09 安徽鸿远机电科技有限公司 一种钻铣床移动螺套
US20170238747A1 (en) * 2012-09-17 2017-08-24 Current Products Corp. Decorative rotatable drive element for moving a window covering
US20200056685A1 (en) * 2018-08-17 2020-02-20 Owen Riehle Actuator
US11033138B2 (en) * 2013-04-11 2021-06-15 Current Products Corp. Motorized drapery apparatus, system and method of use
US11598400B2 (en) 2020-11-19 2023-03-07 Pacific Bearing Corporation Nut with flexible fingers and self-aligning members

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2540849B1 (fr) * 1983-02-15 1986-11-07 Lach Pierre Verin electrique
JPS59195289U (ja) * 1983-06-13 1984-12-25 株式会社クボタ 離脱防止管継手
DE3641438A1 (de) * 1986-03-27 1987-10-01 Brown Inc John Mechanismus zum einstellen einer formlippe
CN103953671A (zh) * 2014-04-30 2014-07-30 王丽 一种防扭减震器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1955954A (en) * 1931-11-02 1934-04-24 Sundstrand Machine Tool Co Back-lash compensator
US2567483A (en) * 1947-12-03 1951-09-11 Hotine William Screw-thread and nut assembly
US2793538A (en) * 1955-12-16 1957-05-28 Beaver Prec Products Inc Wiper for screw threads
US3296880A (en) * 1965-10-18 1967-01-10 Maroth Engineering Co Radial roller anti-friction transmission

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1424163A (fr) * 1965-02-08 1966-01-07 Perfectionnements aux dispositifs d'élimination du jeu dans les systèmes à vis et écrou

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1955954A (en) * 1931-11-02 1934-04-24 Sundstrand Machine Tool Co Back-lash compensator
US2567483A (en) * 1947-12-03 1951-09-11 Hotine William Screw-thread and nut assembly
US2793538A (en) * 1955-12-16 1957-05-28 Beaver Prec Products Inc Wiper for screw threads
US3296880A (en) * 1965-10-18 1967-01-10 Maroth Engineering Co Radial roller anti-friction transmission

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3793896A (en) * 1972-09-06 1974-02-26 Numicon Inc Incremental linear positioning apparatus
US3945481A (en) * 1974-05-08 1976-03-23 Teletype Corporation Resiliently mounted drive nut and carriage assembly
US4210033A (en) * 1977-07-19 1980-07-01 Kerk Motion Products, Inc. Anti-backlash nut
USRE32433E (en) * 1978-07-17 1987-06-09 Kerk Motion Products, Inc. Anti-backlash nut having longitudinal flexural members with ramps thereon and means to apply an axial pre-load force to said ramps
WO1986000110A1 (en) * 1984-06-11 1986-01-03 Renee William C Operator for venetian blinds and combination operator and venetian blind
US4759398A (en) * 1984-06-11 1988-07-26 Renee William C Operator for venetian blinds combination operator and venetian blind, and method of operating venetian blinds
US4977788A (en) * 1988-03-09 1990-12-18 E.C.H. Will Gmbh Apparatus for adjusting the positions of components in machines
US5117701A (en) * 1989-11-14 1992-06-02 Gec Alsthom Sa Screw-and nut type member for transmitting rotary motion
US5199169A (en) * 1991-12-23 1993-04-06 Thomson Saginaw Ball Screw Company, Inc. Methods of making recirculating ball nut and splined shaft and screw assemblies
US5287762A (en) * 1991-12-23 1994-02-22 Thomson Saginaw Ball Screw Company, Inc. Recirculating ball nut and shaft assembly
US5388475A (en) * 1993-09-15 1995-02-14 Beaver Precision Products Ball nut and method of manufacturing same
US5448438A (en) * 1993-11-09 1995-09-05 Quantum Corporation Head actuator having spring loaded split nut
US5562293A (en) * 1994-06-25 1996-10-08 Greene, Tweed Of Delaware, Inc. Stripping ring
US6053064A (en) * 1998-05-01 2000-04-25 L & P Property Management Company Lumbar support screw actuator
US20090288507A1 (en) * 2003-10-23 2009-11-26 Toti Andrew J Control rod mechanism and system
US8251119B2 (en) * 2003-10-23 2012-08-28 Russell L. Hinckley, legal representative Control rod mechanism and system
US20080089621A1 (en) * 2006-10-17 2008-04-17 Scott Edward Barry Bushing assembly for reducing backlash
US20110115577A1 (en) * 2008-04-09 2011-05-19 John David Rhodes linear actuator
GB2458991A (en) * 2008-04-09 2009-10-14 Isotek Electronics Ltd Mechanical linear actuator with zero backlash
US8704620B2 (en) 2008-04-09 2014-04-22 Filtronic Wireless Ltd Linear actuator
US9010205B2 (en) 2011-01-20 2015-04-21 Pacific Bearing Company Linear slide having integral carriage and nut assembly
US8205658B1 (en) * 2011-02-28 2012-06-26 Shih-Ming Lin Operating device for rotating a winding roller of a window blind
US9080655B2 (en) 2011-07-18 2015-07-14 Nook Industries, Inc. No-lash nut assembly
US9303742B2 (en) 2011-11-28 2016-04-05 Pacific Bearing Company Inverted spline rail system
EP2607749A3 (de) * 2011-12-23 2014-04-02 Pacific Bearing Company Mutter mit flexiblen Fingern und radialen Druckelementen
US9243697B2 (en) 2011-12-23 2016-01-26 Pacific Bearing Company Nut with flexible fingers and radial compression members
CN103174813B (zh) * 2011-12-23 2018-04-24 太平洋轴承公司 带有挠性指状物和径向压缩元件的螺母
US20170238747A1 (en) * 2012-09-17 2017-08-24 Current Products Corp. Decorative rotatable drive element for moving a window covering
US10736452B2 (en) * 2012-09-17 2020-08-11 Current Products Corp. Decorative rotatable drive element for moving a window covering
US11033138B2 (en) * 2013-04-11 2021-06-15 Current Products Corp. Motorized drapery apparatus, system and method of use
US9334937B2 (en) 2013-07-03 2016-05-10 Pacific Bearing Company Floating nut and carriage assembly
CN106808280A (zh) * 2015-12-02 2017-06-09 安徽鸿远机电科技有限公司 一种钻铣床移动螺套
US20200056685A1 (en) * 2018-08-17 2020-02-20 Owen Riehle Actuator
US11598400B2 (en) 2020-11-19 2023-03-07 Pacific Bearing Corporation Nut with flexible fingers and self-aligning members

Also Published As

Publication number Publication date
JPS577888Y2 (de) 1982-02-15
FR2090125A1 (de) 1972-01-14
DE2124700B2 (de) 1980-04-03
JPS54574U (de) 1979-01-05
DE2124700C3 (de) 1980-11-27
DE2124700A1 (de) 1971-12-02
FR2090125B1 (de) 1976-12-03
GB1286608A (en) 1972-08-23
CH541094A (fr) 1973-08-31

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AS Assignment

Owner name: DANA CORPORATION

Free format text: MERGER;ASSIGNOR:WARNER ELECTRIC BRAKE & CLUTCH COMPANY;REEL/FRAME:004725/0272

Effective date: 19861231

STCF Information on status: patent grant

Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES)

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Owner name: UNITRON INCORPORATED, TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DANA CORPORATION;REEL/FRAME:007251/0001

Effective date: 19901125