WO2003035428B1 - Positionable linear friction lock assembly - Google Patents
Positionable linear friction lock assemblyInfo
- Publication number
- WO2003035428B1 WO2003035428B1 PCT/US2002/033882 US0233882W WO03035428B1 WO 2003035428 B1 WO2003035428 B1 WO 2003035428B1 US 0233882 W US0233882 W US 0233882W WO 03035428 B1 WO03035428 B1 WO 03035428B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spring
- rod
- force
- housing
- friction lock
- Prior art date
Links
- 230000007246 mechanism Effects 0.000 claims abstract 12
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 claims 1
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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/10—Telescoping systems
- F16B7/14—Telescoping systems locking in intermediate non-discrete positions
- F16B7/1481—Telescoping systems locking in intermediate non-discrete positions with a gripping helical spring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
- B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
- B60N2/23—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by linear actuators, e.g. linear screw mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/90—Details or parts not otherwise provided for
- B60N2/919—Positioning and locking mechanisms
- B60N2/929—Positioning and locking mechanisms linear
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Seats For Vehicles (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The present invention involves a friction lock device (10, 110, 710, 810) which utilizes one or more friction springs (80, 120, 180) coaxially disposed about a translating rod (30, 130, 730, 830) within an elongated housing (51, 151). Bias bushings (70, 160, 170) are provided for slidably supporting the rod adjacent one end of each spring. Each bushing defines a sloped shoulder (76, 166, 176) against which the friction spring bears, with the angle (78, 168, 178) of the shoulder calibrated such that the spring is canted to provide a holding force up to a predetermined axial force on the rod, and to permit the rod to slip relative to the spring at greater axial forces without disturbing the integrity of the spring or its coils (83). The device includes a release or actuation mechanism (90, 190) to partially unwind the springs, thereby reducing the gripping force of the springs and freeing the rod to slide through the springs.
Claims
1. A friction lock (10, 110, 710, 810) having a housing (51, 151), a first bushing (70, 170) engaged to the housing and defining a first bore (75, 175), and a first spring seat (72, 172) at one end of the first bore, a rod (30, 130, 730, 830) slidably extending through the first bore along a longitudinal axis defined by the first bore, and a first coil spring (80, 180), positioned around and coaxial with the rod, a first sloped shoulder (16, 176) defined by a base of the first spring seat; the first coil spring having a first end (81) capable of being asymmetrically compressed by said first sloped shoulder when a first axial force is applied to the rod in a first direction (A); and characterized by: said first sloped shoulder being inclined less than 25 degrees relative to a line perpendicular to said longitudinal axis and said first sloped shoulder and said first coil spring are structured and arranged such that said first coil spring exerts a gripping force on the rod sufficient to fix the rod relative to the housing upon said first axial force being less than a first predetermined axial slip force, and that said first spring coil does not exert sufficient gripping force on the rod to fix the rod relative to the housing upon said first axial force being equal or greater than said first predetermined slip force.
2. The friction lock of Claim 1, characterized in that: the first coil spring has a first tang (84) at said first end of the first spring, said first tang protruding radially outward from the first spring; and the first bias bushing has a first catch (77), said first catch engaging said first tang.
3. The friction lock of Claim 1, characterized by a release mechanism (90, 190) defining an opening for engaging a second end (82) of the first spring and having a lever (91) capable of applying an unwinding torsion to the first spring.
4. The friction lock of Claim 3, characterized in that said release mechanism further comprises a C-shaped tube portion (93, 193) for receiving said second spring end, said tube portion includes a first slotted notch (96) protruding across an interior segment of said tube portion and contacting said second spring end, and said lever is attached to said tube portion.
5. The friction lock of Claim 4, characterized by a cap bushing (60) engaged to the housing and having an interior lip (64) at a first end, said lip coupled
22 with said tube portion, and said tube portion positioned between said second spring end and said cap bushing.
6. The friction lock of Claim 5, characterized in that the lock measures less than 31 millimeters in length.
7. The friction lock of Claim 1, characterized by: a second bushing (160) engaged to the housing and defining a second bore (165) aligned with the longitudinal axis, said second bushing further defining a second spring seat (162) at one end of said second bore, a base of said second spring seat defining a second sloped shoulder (166); and a second coil spring (120) positioned axially between the first coil spring and said second bushing, said second spring disposed around and coaxial with the rod, said second spring having a first end capable of being asymmetrically compressed by said second sloped shoulder when a second axial force is applied to the rod in a second direction (B).
8. The friction lock of claim 7, characterized in that said second sloped shoulder and said second coil spring are structured and arranged such that said second coil spring exerts a gripping force on the rod sufficient to fix the rod to the housing upon said second axial force being less than a second predetermined axial slip force, and that said spring coil does not exert sufficient gripping force is provided on the rod to fix the rod relative to the housing upon said second axial force being equal to or greater than said second predetermined slip force.
9. The friction lock of Claim 8, characterized in that: the first and said second coil springs each have a first tang (81) at said first end of said spring, said tangs protruding radially outward from said first and second springs; and the first and said second bias bushings each have a catch, said catch (77) engaging said first tang.
10. The friction lock of Claim 8, characterized by a release mechanism (190) defining an opening for engaging a second end of each first and second springs and having a lever (91) capable of applying an unwinding torsion to the first and said second springs.
11. A friction lock ( 110, 710, 810) having a predetermined axial slip force, the lock comprising a housing (151), a first and second bushing (170 and 160) engaged to opposite ends of the housing, each bushing defining an axial bore (175, 165), and a counterbored spring seat (162, 172) at one end of each bore, the first and second bushings oriented symmetrically so that the counterbored spring seats face each other and the bores define a longitudinal axis (179), a rod (130, 730, 780) located through the bores of the bushings and defining a flange end (133), and a first and second coil spring (180 and 120) positioned between the first and second bushings and coaxial with the rod, a sloped shoulder (166, 176) defined by a base of the spring seat; characterized by: each spring having a first end capable of being asymmetrically compressed by the respective first or second bushing when an axial force is applied to the rod in a respective first or second direction (A or B); said first sloped shoulder is inclined less than 25 degrees relative to a line perpendicular to said longitudinal axis and said first sloped shoulder and said first coil spring are further structured and arranged such that said spring coil exerts a gripping force on the rod sufficient to fix the rod relative to the housing upon said first axial force being less than a first predetermined axial slip force, and that said spring coil does not exert sufficient gripping force on the rod to fix the rod relative to the housing upon said first axial force being equal or greater than said first predetermined slip force.
12. The friction lock assembly of claim 11 , characterized in that said second sloped shoulder and said second coil spring are structured and arranged such that said spring coil exerts a gripping force on the rod sufficient to fix the rod to the housing upon said second axial force being less than a second predetermined axial slip force, and that said spring coil does not exert sufficient gripping force on the rod to fix the rod relative to the housing upon said second axial force being equal to or greater than said second predetermined slip force.
13. The friction lock of claim 11 , characterized by: a release mechanism (190) defining a tube portion (193) for receiving second ends of the first and second springs, said tube portion having a second catch (192) for contacting and rotationally displacing said second ends, said release mechanism also having a lever portion (91) for actuating said tube portion and protruding from an interior of the housing.
24
14. A friction lock system for adjusting a first seat member (18) relative to a second seat member (16), including at least two friction locks (10, 110, 710, 810), each friction lock comprising a housing (51, 151) attached to the first seat member, a first bushing (70, 170) attached at one interior end of the housing, the bushing defining a first bore (75, 175) and a first counterbored spring seat (72, 172) at one end of the bore, a rod (30, 130, 730, 830) located through the first bushing bore and attached to the second seat member, and a first coil spring (80, 180) positioned around and coaxial with the rod, the first spring having a first and second end, the first bias bushing defining a first sloped shoulder (76, 176) defined by a base of said first spring seat; said first end capable of being asymmetrically compressed by said first sloped shoulder when a first axial force is applied to the rod in a first direction (A); characterized by: said first sloped shoulder being inclined less than 25 degrees relative to a line perpendicular to said first bore and said first sloped shoulder and said first coil spring are structured and arranged such that said first spring coil exerts a gripping force on the rod sufficient to fix the rod relative to the housing upon said first axial force being less than a first predetermined axial slip force, and that said first spring coil does not exert sufficient gripping force is provided on the rod to fix the rod relative to the housing upon said first axial force being equal or greater than said first predetermined slip force.
15. The friction lock system of Claim 14, each said friction lock characterized by: a release mechanism (90) defining a tube portion (93) for receiving said second end of the spring and capable of applying an unwinding torsion to the spring; said release mechanism further defining a lever portion (91) attached to said tube portion, said lever portion capable of actuating said tube portion; and a cap bushing (60) attached at an opposite interior end of the housing, said cap bushing defining a bore (65) and defining an interior lip (64) at a first end of said bore, said lip coupled with said tube portion of said release mechanism, and said cap bushing positioning said tube portion between the second spring end and said cap bushing.
25
16. The friction lock system of Claim 15, characterized by: an actuator cable (13) connected to both said lever portions of said release mechanisms such that movement of said levers is synchronized; and an actuator (12) connected to said actuator cable or one of said lever portions such that movement of said actuator moves said actuator cable and both said lever portions; wherein movement of said actuator applies an unwinding torsion to the springs, releasing the rods to translate relative to the housings, thereby allowing movement of the first seat member relative to the second seat member.
17. The friction lock system of Claim 14, each friction lock characterized by: a second bias bushing (160) attached at an opposite end of the housing, said second bushing defining a second bore (165) and defining a counterbored spring seat (162) at one end of said bore, a base of said second spring seat defining a second sloped shoulder (166); and a second coil spring (120) positioned axially between the first and said second bushing and around and coaxial with the rod, said second spring having a first end capable of being asymmetrically compressed by said second sloped shoulder when a second axial force is applied to the rod in a second direction (B).
18. The friction lock system of Claim 17, characterized in that said asymmetric compression of said second spring grips and fixes the rod relative to the housing up to a second predetermined axial slip force; and said second sloped shoulder determines said second predetermined axial slip force and allows the rod to slip relative to said second spring when said second axial force exceeds said second predetermined axial slip force.
19. The friction lock system of Claim 18, each friction lock characterized by a release mechanism (190) defining an opening for engaging a second end of the first and said second springs and having a lever (91) capable of applying an unwinding torsion to said springs.
20. The friction lock system of Claim 19, characterized by: a cable (14) connected to said lever portion of said release mechanism; and
26 an actuator (12) connected to said cable or one of said lever portion such that movement of said actuator moves said cable and said lever portion; wherein movement of said actuator applies an unwinding torsion to the first and said second springs, releasing the rods to translate relative to the housings, thereby allowing movement of the first seat member relative to the second seat member.
27
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/000,596 | 2001-10-24 | ||
| US10/000,596 US20030075393A1 (en) | 2001-10-24 | 2001-10-24 | Positionable linear friction lock assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2003035428A1 WO2003035428A1 (en) | 2003-05-01 |
| WO2003035428B1 true WO2003035428B1 (en) | 2003-12-11 |
Family
ID=21692180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2002/033882 WO2003035428A1 (en) | 2001-10-24 | 2002-10-23 | Positionable linear friction lock assembly |
Country Status (2)
| Country | Link |
|---|---|
| US (2) | US20030075393A1 (en) |
| WO (1) | WO2003035428A1 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030075393A1 (en) * | 2001-10-24 | 2003-04-24 | Shields Roy E. | Positionable linear friction lock assembly |
| US20070227288A1 (en) * | 2006-03-14 | 2007-10-04 | Ferenc Anthony S | Push-to-release foot brake with eccentric torsion-lock self adjust mechanism |
| WO2008150602A1 (en) * | 2007-05-31 | 2008-12-11 | Porter Group, Llc | Vehicle armrest positioning assembly |
| US9283874B2 (en) * | 2008-10-07 | 2016-03-15 | Mobius Protection Systems Ltd. | Shock absorbing mechanism with feet protection for vehicle and aircraft seats |
| US8336864B2 (en) * | 2009-09-21 | 2012-12-25 | Bal Seal Engineering, Inc. | Longitudinal canted coil spring contacts to facilitate assembly |
| DE102015100921B4 (en) | 2015-01-22 | 2017-01-26 | Faurecia Autositze Gmbh | Bowden cable adjustment device for a vehicle seat and vehicle seat |
| DE102016220501A1 (en) * | 2016-01-29 | 2017-08-03 | Bos Gmbh & Co. Kg | Armrest assembly for a motor vehicle seat |
| CN107397364B (en) * | 2016-05-20 | 2023-06-02 | 永艺家具股份有限公司 | Damping adjusting mechanism for leisure chair |
| US10647227B2 (en) * | 2016-12-05 | 2020-05-12 | Porter Systems Inc. | Precision linear mechanical lock device |
| US10750869B2 (en) * | 2017-07-06 | 2020-08-25 | Ashley Furniture Industries, Inc. | Motion furniture mechanism with pre-aligned linkage member |
| CN109712851B (en) * | 2017-10-25 | 2024-04-12 | 浙江正泰电器股份有限公司 | Electromagnetic release assembly |
| CN107965520A (en) * | 2017-11-28 | 2018-04-27 | 浙江中航通飞研究院有限公司 | It is a kind of can optional position locking linear motion device |
| CN108813925B (en) * | 2018-07-18 | 2024-03-12 | 佛山市合和兴科技实业有限公司 | Vane type stepless lifter |
| US11180110B2 (en) * | 2018-09-12 | 2021-11-23 | Ford Global Technologies, Llc | Vehicle buckle assembly |
| DE102018218595A1 (en) | 2018-10-30 | 2020-04-30 | Lear Corporation | SEAT ARRANGEMENT WITH AN INCLINATION MECHANISM |
| KR102621617B1 (en) * | 2018-12-11 | 2024-01-08 | 현대자동차주식회사 | Fold and dive seat for vehicle |
| KR102586461B1 (en) * | 2019-03-25 | 2023-10-10 | 현대자동차주식회사 | Fold and dive seat for vehicle |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3874480A (en) * | 1972-04-03 | 1975-04-01 | Porter Co P L | Friction brake mechanism |
| JPS5950538B2 (en) * | 1975-08-18 | 1984-12-08 | 日本発条株式会社 | reclining seat |
| US4457406A (en) * | 1980-06-06 | 1984-07-03 | P. L. Porter Company | Improved friction lock |
| US4577730A (en) * | 1983-08-30 | 1986-03-25 | P. L. Porter Company | Mechanical lock |
| US5150771A (en) * | 1990-05-11 | 1992-09-29 | P. L. Porter Company | Coil spring or friction-lock mechanisms |
| US5568843A (en) * | 1993-06-08 | 1996-10-29 | P. L. Porter Co. | Precision linear mechanical lock |
| US5441129A (en) * | 1993-06-08 | 1995-08-15 | P. L. Porter Co. | Precision linear mechanical lock |
| US5819881A (en) * | 1995-07-24 | 1998-10-13 | P. L. Porter Co. | Dual locking linear mechanical lock for high loads |
| US5794470A (en) * | 1996-06-25 | 1998-08-18 | P.L. Porter Co. | Mechanical seat lock |
| US6164419A (en) | 1999-04-21 | 2000-12-26 | P. L. Porter Co. | Mechanical seat lock with translating rod that does not rotate |
| US20030075393A1 (en) * | 2001-10-24 | 2003-04-24 | Shields Roy E. | Positionable linear friction lock assembly |
-
2001
- 2001-10-24 US US10/000,596 patent/US20030075393A1/en not_active Abandoned
-
2002
- 2002-10-23 US US10/278,336 patent/US20030075394A1/en not_active Abandoned
- 2002-10-23 WO PCT/US2002/033882 patent/WO2003035428A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| US20030075394A1 (en) | 2003-04-24 |
| US20030075393A1 (en) | 2003-04-24 |
| WO2003035428A1 (en) | 2003-05-01 |
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