US3560032A - Adjustable clutch for relatively moving tubular parts - Google Patents
Adjustable clutch for relatively moving tubular parts Download PDFInfo
- Publication number
- US3560032A US3560032A US732464A US3560032DA US3560032A US 3560032 A US3560032 A US 3560032A US 732464 A US732464 A US 732464A US 3560032D A US3560032D A US 3560032DA US 3560032 A US3560032 A US 3560032A
- Authority
- US
- United States
- Prior art keywords
- fingers
- tube
- finger
- friction
- bolt
- 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
Links
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- 230000007480 spreading Effects 0.000 abstract description 3
- 238000003892 spreading Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 7
- 239000004698 Polyethylene Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920001684 low density polyethylene Polymers 0.000 description 4
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- 235000019640 taste Nutrition 0.000 description 2
- 229920004943 Delrin® Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
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- 230000008014 freezing Effects 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- F16B7/1463—Telescoping systems locking in intermediate non-discrete positions with the expansion of an element inside the outer telescoping member due to the axial movement towards a wedge or a conical member
-
- 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
- Y10T403/00—Joints and connections
- Y10T403/32—Articulated members
- Y10T403/32254—Lockable at fixed position
- Y10T403/32426—Plural distinct positions
-
- 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
- Y10T403/00—Joints and connections
- Y10T403/53—Split end with laterally movable opposed portions
- Y10T403/535—Split end with laterally movable opposed portions with separate force-applying means
Definitions
- This invention relates to a means for controlling the relative movement between a first hollow member and a second member which telescopes within the first member.
- a problem that has faced entertainers, speakers, singers, etc., for an appreciable time has been the lack of uniformity in personal preference with regard to the height at which a microphone should be adjusted when it is being used. That is, some people naturally talk and sing loudly, and therefore do not need or want a microphone to conspicuously intrude between themselves and their audience. Others talk softly and have a genuine need for a microphone to be placed rather closely to their mouth. Furthermore, in any random group of people, there are more likely to be people of diverse heights than of a uniform height. Consequently, the chances are great that a microphone which is adjusted to an optimum height for a first person will likely not be at an optimum height for a subsequent person. This chance of incompatible microphone heights is even more likely when the first person is a male, such as a master of ceremonies, and the subsequent person is, for example, a female vocalist.
- the requirement that two hands be used in adjusting a microphone stand is not really an insurmountable obstacle to satisfactory use; but it is less desirable than would be one-handed adjustment. This is particularly true because vocalists so often use their hands in expressive movements that are intended to complement their singing. Hence, to observe a singer struggling with both hands to make an adjustment in microphone height during a performance is to observe a physical act which can detract from the words of the song and the atmosphere that the singer is trying to create with the song.
- the requirement for two-handed operation of a stand is perhaps even more of a problem to a musician who must utilize a sheet music stand with a positive lock, because he must usually lay down his instrument in order to have both hands free to change the height of a stand.
- Another object is to provide an improved microphone stand.
- a further object is to provide a substitute for the conventional clutch found in most microphone stands.
- Yet another object is to provide an economical friction element which is adjustable to provide any desired degree of resistance to movement between a tubular member and the friction element enveloped thereby.
- a still further object is to provide a dependable stand which is adjustable in height through the use of only one hand.
- FIG. 1 is a representation of a microphone stand which is adjustable in height by virtue of the telescoping action of a small diameter tube within a large diameter tube;
- FIG. 2 is an isometric view, partially sectioned, of the friction device which controls relative movement between an inner and outer tube such as those shown in FIG. 1;
- FIG. 3 is an elevation view in section of a friction element before it is installed in a device such as shown in FIG. 2;
- FIG. 4 is an elevation view in section of the friction device shown in FIG. 2;
- FIG. 5 is an elevation view in section of an alternate embodiment of a friction device
- FIG. 6 is an end view of a friction device such as the one shown in FIG. 5;
- FIG. 7 is an elevation view in section of a still further embodiment of a friction device.
- FIG. 8 is an end view of a friction device such as the one shown in FIG. 7.
- a microphone stand 10 is shown in a conventional upright position.
- a microphone 11 is mounted on top of the stand 10 in a routine manner, and the height of the microphone is adjusted by moving an inner tube 12 relative to an outer tube 13.
- the inner element 12 it is not necessary that the inner element 12 be hollow, however; it is only necessary that it be elongated so that it will telescope within the outer tube 13.
- a friction device 14 comprising a preferred embodiment is attached to one end of the tube 12 by any convenient means such as by staking.
- the numeral 15 is employed to refer to a portion of the tube that has been upset to secure the device 14 in place.
- the device 14 is preferably made from a plastic such as low-density polyethylene; thus, it readily yields during the upsetting process to achieve an effective lock between the friction device and the tube 12.
- the friction device 14 has a base 16 and a threaded bore extending along the longitudinal axis, which can perhaps best be seen in FIG. 3.
- the element 14 also has a plurality of pendant fingers 18 extending from the periphery of the base, in a manner such that they are adapted to bear against an internal surface of the tube 13.
- Each of the fingers 118 comprises a wedge having proximal portions which are nearer the longitudinal axis of the device 14 than are the distal portions.
- the internal surface 19 which joins proximal and distal portions of a respective finger 18 is inclined with respect to the longitudinal axis of the device 14; for convenience, it is referred to herein merely as the inclined surface.
- Each finger 18 further has an internal groove 20 in its distal portion, with the plurality of grooves being aligned so as to retain a ring 21 therein.
- a threaded member 22 such as a bolt is engaged in the bore 17 of the friction element 14, with its head 23 extending out of the tube 12 such that it may be rotated to affect the position of the head with respect to the fingers 18.
- the head 23 has a diameter which is less than the distace between diametrically opposed internal surfaces of the finger distal portions, and is greater than the distance between diametrically opposed internal surfaces of the finger proximal portions. Since an inclined surface 19 extends between distal and proximate portions of a respective finger 18, the relative position between the bolt head 23 and the fingers can be adjusted by turning the bolt 22 with respect to the friction element 14. The position of the bolt 22 can be adjusted such that the head 23 bears against the outer tube 13.
- FIG. 3 which shows only the friction element 14
- FIG. 4 which shows both the friction element and the bolt 22
- a split ring 24 is inserted into the grooves 20 provided for this purpose.
- the ring 24 has a diameter which when it is in a relaxed or uncompressed state, is greater than the relaxed distance between diametrically opposed grooves 20. That is, diametrically opposed fingers 18 are initially separated by a distance which will not admit the entry of ring 24; the ring is therefore made resilient so that it may be radially compressed to present a smaller diameter, and the fingers 18 are designed to flex with respect to the base 16, so that the ring can be inserted into the grooves 20.
- the depth of the grooves 20 and the diameter of the ring 24 are set so that when the split ring is approximately in its position and is released from the tool used to insert it, the ring cannot expand as much as would be required to return it to its relaxed or uncompressed position. Hence, the ring 24 is kept in compression when it is in place in the grooves 20, and the distal portions of the fingers 18 therefore will continuously bear against the outer tube with a force which is substantially constant.
- the installed friction device 14 controls the relative movement between the inner member 12 and the outer tube 13 with a degree of certainty never before possible with such a simple and therefore economical construction.
- Th t i the friction device 14 is adjustable to provide practically any desired amount of drag when the inner tube 12 is moved with respect to the outer tube 13.
- the first components of the overall drag is realized from the force which the resilient ring 24 exerts on the distal portions of the fingers 18, which force is in turn exerted on the outer tube 13. This first drag component is substantially constant, once the device 14 is fabricated and installed.
- the second component of the total drag is adjustable, which contributes in a dominant manner to the degree of control that distinguishes this invention from prior devices,
- This second drag component is realized from the force which the bolt head 23 exerts on the proximal portions of the fingers 18, which force is in turn exerted on the outer tube 13.
- the force is adjusted by turning the bolt 22 so as to advance or withdraw it from the threaded bore 17 of the member 14.
- Rotating the bolt head 23 is most readily accomplished by turning a stand on its side and then telescoping the inner tube 12 within the outer tube 13 until the bolt head is reachable with a screwdriver or the like from the bottom of the stand.
- the head 23 When the bolt r 22 is advanced into the friction element 14, the head 23 eventually contacts the inclined surfaces 19, and further turning causes the fingers 18 to spread outwardly until proximal portions of the fingers bear against the inner surface of the outer tube 13.
- the force transmitted to the finger proximal portions does not interfere with the force transmitted to the finger distal portions because the forces are applied in two axially spaced planes. That is, the forces applied by the snap ring 24 and the bolt head 23 are applied at positions adjacent opposite ends of the wedge-shaped fingers 18; being spaced as they are, the ring and bolt cooperate to apply an appropriate total force to the outer tube 13 through the same friction elements or fingers 18 without interfering with each other.
- the substantially constant force exerted by the resilient ring 24 maintains contact between the fingers 18 and the outer tube 13 and therefore compensates for thermal expansion of the outer tube 13 as well as, for example, shrinkage of the polyethylene due to freezing.
- the force which is exerted by a resilient member such as snap ring 24 is effectively established at a permanent value during manufacture of the stand.
- the resilient member alone cannot achieve the selectivity which entertainers generally desire in microphone stands.
- friction element 14 is constructed so simply and is so easy to adjust that practically anyone could effect the adjustment once they were told which way to turn the bolt 22. Too, the parts that;
- a friction device 14A is shown wherein pendant fingers 18A are arranged so that their wedged cross-section operates to spread the fingers when a bolt is backed out of, rather than turned into, the threaded bore.
- the bolt head 23A is inclined so that it is approximately tangent to the inclined surface 19A, and it has a recess which is adapted to receive the end of an Allen wrench or the like when turning is to be effected.
- a compression spring 25 is shown in a compressed position as if it were being restrained by an outer tube. Said spring 25, like the ring 24 previously described, urges the distal portions of a finger 18A outward such that it continuously bears against an outer tube.
- a hole 26 is provided in the spring 25 to permit a wrench to be inserted through the spring to effect turning of the bolt 22A.
- the reversed slope of the wedge-shaped fingers in this embodiment might make it difficult to extract a finished unitary piece from the mold.
- a further embodiment shown in FIGS. 7 and 8 includes a friction device 14B secured to one end of the tube 12B.
- the tube 12B is cut so that a portion of the tube extends along the side of the friction device 14B.
- a single finger 18B extends from the periphery of the base 16B where it is adapted to bear against an internal surface of a mating hollow member.
- the bolt 228 has a head 23B whose radius is less than the distance between the longitudinal axis 28 of the friction element 14B and the internal surface of a distal portion of the finger 18B, but whose radius is greater than the distance between said longitudinal axis and the internal surface of a proximal portion of the finger.
- An inclined surface 19B joins the proximal and distal portions of the finger 18B as before.
- the position of the head 23B is adjustable, which in turn changes the force with which the finger bears against an adjacent hollow tube.
- a compression spring 24B is provided between the distal portion of the finger 18B and a portion of the tube 12B so that it urges the finger outward with a substantially constant force. -If the member 12B was a solid rod rather than a hollow tube, it would only be necessary to select a spring which would be compatible with whatever mounting structure is available in order that the spring can be kept in compression.
- both of the embodiments shown in FIGS. 5-8 function in substantially the same way as that shown in FIGS. 2-4, and no doubt other possible modifications will suggest themselves to those skilled in the art.
- the means for pressing the friction element must be compatible with the mounting of the element.
- the bolt 22 is capable of exerting a greater force than is a conventional snap ring 24; accordingly, it is appropriate that the bolt means be used at the proximal end of a finger 18, because said proximal end is stilfer and less susceptible to flexing movement than the distal end.
- the bolt 22 and the snap ring 24 have the spatial relationship shown, i.e., it is preferable that their positions not be reversed.
- the material from which the friction device 14 is made can of course be selected according to the use to which the product is to be put. For example, if very small adjustments in tube spacing are to be made and yet firm gripping action is desired, it will probably be appropriate to use a material whose static coefficient of friction is low. Other factors deserving consideration are the relationship between the static and the sliding coeflicients of friction, the weight of the device to be supported by the stand, whether the tubes are normally used in a vertical or in a horizontal plane, the frequency of relative movement between the two members, etc. Because of the adjustment which is made possible by this invention, however, these factors need not be as accurately determined before a stand is manufactured as is the case with many other stands.
- low-density polyethylene there are of course other materials which might be employed for the friction device 14, including, for example, other polyethylenes, propylene, nylon, Delrin, etc.
- low-density polyethylene produces the best results, said results being based upon favorable wear resistance, quietness of operation, molding qualities, flexural strength, Rockwell hardness, coefficients of friction, flexural modulus, etc.
- Means for controlling the relative movement between a first hollow member and a second member adapted to telescope within the first member comprising:
- a friction element secured to a first end of the second member, said element having a base with a threaded bore extending along the longitudinal axis thereof, and having at least one pendant finger extending from the periphery of the base and adapted to bear against an internal surface of the hollow member, said finger having proximal portions which are nearer the longitudinal axis of the element than are the distal portions, with an inclined surface joining the proximal and distal portions thereof, and said finger having an internal radially extending groove in its distal portion; a threaded member engaged in the bore of the friction element, said member having a head adapted to be rotated to affect the position of the head with respect to a finger, said head having a radius which is less than the distance between the longitudinal axis of the friction element and the internal surface of a distal portion of a finger, and said radius being greater than the distance between said longitudinal axis and the internal surface of a proximal portion 8 of a finger, whereby the position of said threaded member with respect to
- a radially compressible spring member positioned within said grooves to cause the distal portion of said finger to bear against the first hollow member with a substantially constant force.
- a microphone stand having a hollow outer tube and an inner tube adapted to be selectively positioned at least partially within and extending beyond the outer tube, and further having a means for adjustably securing the inner tube to the outer tube, comprising:
- said element having a base with a threaded bore extending along the longitudinal axis thereof, and having at least two diametrically opposed pendant fingers extending longitudinally from the periphery of the base, each of which fingers is adapted to bear against an internal surface of the hollow member, said fingers having proximal portions which are nearer the longitudinal axis of the element than are the distal portions, with an inclined surface joining proximal and distal portions of respective fingers, and each finger having an internal groove in its distal portion, with said grooves being aligned so as to retain a ring therebetween;
- a bolt threadably engaged in the bore of the friction element said bolt having a head adapted to be rotated to affect the position of the head with respect to the fiingers, said head having a diameter which is less than the distance between diametrically opposed internal surfaces of the respective finger distal portions and is greater than the distance between diametrically opposed internal surfaces of the respective finger proximal portions, whereby the position of said bolt with respect to the friction element is adjustable as desired to cause the head to bear against the fingers and in turn to cause the fingers to bear against the outer tube;
- a split ring of resilient material inserted into the grooves of the fingers, the diameter of the uncompressed ring being greater than the initial distance between diametrically opposed grooves such that the fingers are spread outwardly by the ring, the ring being of such a diameter that the ring causes the spread fingers to bear against the outer tube.
- Means for controlling the relative movement between a first hollow member and a second member adapted to telescope within the first member comprising:
- a friction element secured to a first end of the second member, said element having a base with an axially extending threaded bore, and having a plurality of pendant fingers extending from the periphery of the base and adapted to bear against an internal surface of the hollow member, said fingers having proximal portions which are nearer the longitudinal axis of the element than are the distal portions, with an inclined surface joining the inner proximal and distal portions of a respective finger, and each of said fingers having an internal radially extending groove in its distal portion, said grooves being axially aligned;
- a threaded member engaged in the bore of the friction element, and being adapted to be rotated to affect the position thereof with respect to a finger
- a head on said threaded member having a diameter which is less than the distance between diametrically opposed internal surfaces of the finger distal portions and is greater than the distance between diametrically opposed internal surfaces of the finger proximal portions, whereby the position of said threaded member with respect to the friction element is adjustable as desired to cause the head to bear against a finger and in turn to cause said finger to bear against the first hollow member;
- a substantially constant force. a radially compressed resilient member inserted into 5.
- Means for controlling the relative movement between the grooves of the fingers, the uncompressed diameter a first hollow member and a second member adapted to of said radially compressed member being greater telescope within the first member, comprising: than the initial distance between diametrically pa friction element secured to a first end of the second posed grooves such that the fingers are spread outmember, said element having a base with an axially wardly thereby into bearing contact against the outer a radially compressible spring member positioned withextending threaded bore and having at least two tube.
- diametrically opposed pendant fingers extending References Cited longitudinally from the periphery of the base and UNITED STATES PATENTS adapted to bear against an internal surface of the hollow member, said fingers having proximal por- 2'494878 1/1950 Jensen 287 58CT tions which are nearer the longitudinal axis of the 2505625 4/1950 Nordstrom 287 126X element than are the distal portions, and each finger 2997317 8/1961 Scott 285 42IX having an internal groove in its distal portion, said 30041743 10/1961 Wenger 287-58CTX grooves being axially aligned;
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US73246468A | 1968-05-27 | 1968-05-27 |
Publications (1)
Publication Number | Publication Date |
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US3560032A true US3560032A (en) | 1971-02-02 |
Family
ID=24943597
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US732464A Expired - Lifetime US3560032A (en) | 1968-05-27 | 1968-05-27 | Adjustable clutch for relatively moving tubular parts |
Country Status (1)
Country | Link |
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US (1) | US3560032A (en) |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3984104A (en) * | 1976-01-29 | 1976-10-05 | Maurice Anthony Negrini | Plastic bowling pin |
US4087187A (en) * | 1976-08-30 | 1978-05-02 | Vincent Asaro | Locking mechanism for extension rods |
US4453689A (en) * | 1981-07-10 | 1984-06-12 | Northern Telecom Limited | Adjustable mounting |
US4459933A (en) * | 1980-11-06 | 1984-07-17 | Vickers Limited | Marine tether anchoring device |
US4895471A (en) * | 1988-03-18 | 1990-01-23 | Zenith Products Corporation | Expander mechanism for telescoping tubes |
US4947607A (en) * | 1989-01-23 | 1990-08-14 | Usg Interiors, Inc. | Suspended ceiling construction and compression strut therefor |
US6045288A (en) * | 1997-10-20 | 2000-04-04 | M. Randall Pasternak | Adjustable telescoping utility pole |
GB2410290A (en) * | 2004-01-22 | 2005-07-27 | K H S Musical Instr Co Ltd | Telescopic tube assembly |
US20070289406A1 (en) * | 2005-07-19 | 2007-12-20 | Bear Corporation | Bicycle crank assembly |
US20090324327A1 (en) * | 2008-06-30 | 2009-12-31 | Specialized Bicycle Components, Inc. | Vertically adjustable bicycle assembly |
US20120103924A1 (en) * | 2010-10-27 | 2012-05-03 | Shan-Chi Chuang | Curtain Pole Assembly Having Detachable Structure |
US8479932B2 (en) * | 2011-05-09 | 2013-07-09 | Interdesign, Inc. | Tension rod |
US20140207196A1 (en) * | 2013-01-22 | 2014-07-24 | Paul Slagle | Limited Collapse Surgical Screws |
US8888115B2 (en) | 2010-04-07 | 2014-11-18 | Specialized Bicycle Components, Inc. | Bicycle seat tube |
US8926216B2 (en) | 2011-03-11 | 2015-01-06 | Specialized Bicycle Components, Inc. | Adjustable assembly for a bicycle |
US10246155B2 (en) * | 2011-03-11 | 2019-04-02 | Specialized Bicycle Components, Inc. | Adjustable assembly for a bicycle |
US20190186157A1 (en) * | 2017-12-15 | 2019-06-20 | Jonathan J. Melic | Safety fence assembly |
US10752308B2 (en) * | 2015-07-21 | 2020-08-25 | Lupaan Gmbh | Telescopic seat post for bicycle frames |
USD899895S1 (en) | 2018-02-23 | 2020-10-27 | House of Atlas, LLC | Surface mount |
US10959559B2 (en) | 2019-03-08 | 2021-03-30 | House of Atlas, LLC | Dual-mounted end cap system and locking system for an adjustable rod |
US11215217B2 (en) | 2018-02-23 | 2022-01-04 | House of Atlas, LLC | Surface mount |
US11382447B2 (en) | 2019-07-30 | 2022-07-12 | House of Atlas, LLC | Adjustable rod features |
US20230180957A1 (en) * | 2021-12-14 | 2023-06-15 | Dongguan Shenghong Household Items Co., Ltd | Internal Locking Retractable Shower Curtain Rod and Connector |
USD1005084S1 (en) | 2020-01-21 | 2023-11-21 | Olson Ip Technologies, Inc. | Suction cup mount |
US11825940B2 (en) | 2020-05-18 | 2023-11-28 | House of Atlas, LLC | Customizable shower caddy |
US11889958B2 (en) | 2019-04-17 | 2024-02-06 | House of Atlas, LLC | Rotating shower rod |
US11974704B2 (en) | 2022-03-03 | 2024-05-07 | House Of Atlas Llc | Customizable shower caddy |
-
1968
- 1968-05-27 US US732464A patent/US3560032A/en not_active Expired - Lifetime
Cited By (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3984104A (en) * | 1976-01-29 | 1976-10-05 | Maurice Anthony Negrini | Plastic bowling pin |
US4087187A (en) * | 1976-08-30 | 1978-05-02 | Vincent Asaro | Locking mechanism for extension rods |
US4459933A (en) * | 1980-11-06 | 1984-07-17 | Vickers Limited | Marine tether anchoring device |
USRE32274E (en) * | 1980-11-06 | 1986-11-04 | Vickers Public Limited Company | Marine tether anchoring device |
US4453689A (en) * | 1981-07-10 | 1984-06-12 | Northern Telecom Limited | Adjustable mounting |
US4895471A (en) * | 1988-03-18 | 1990-01-23 | Zenith Products Corporation | Expander mechanism for telescoping tubes |
US4947607A (en) * | 1989-01-23 | 1990-08-14 | Usg Interiors, Inc. | Suspended ceiling construction and compression strut therefor |
US6045288A (en) * | 1997-10-20 | 2000-04-04 | M. Randall Pasternak | Adjustable telescoping utility pole |
GB2410290A (en) * | 2004-01-22 | 2005-07-27 | K H S Musical Instr Co Ltd | Telescopic tube assembly |
US7770492B2 (en) * | 2005-07-19 | 2010-08-10 | Bear Corporation | Bicycle crank assembly |
US20070289406A1 (en) * | 2005-07-19 | 2007-12-20 | Bear Corporation | Bicycle crank assembly |
US10053172B2 (en) | 2008-06-30 | 2018-08-21 | Specialized Bicycle Components, Inc. | Adjustable assembly for bicycles |
US10647373B2 (en) | 2008-06-30 | 2020-05-12 | Specialized Bicycle Components, Inc. | Adjustable assembly for bicycles and methods of using same |
US8328454B2 (en) * | 2008-06-30 | 2012-12-11 | Specialized Bicycle Components, Inc. | Vertically adjustable bicycle assembly |
US8702336B2 (en) | 2008-06-30 | 2014-04-22 | Specialized Bicycle Components, Inc. | Vertically adjustable bicycle assembly |
US20090324327A1 (en) * | 2008-06-30 | 2009-12-31 | Specialized Bicycle Components, Inc. | Vertically adjustable bicycle assembly |
US8888115B2 (en) | 2010-04-07 | 2014-11-18 | Specialized Bicycle Components, Inc. | Bicycle seat tube |
US20120103924A1 (en) * | 2010-10-27 | 2012-05-03 | Shan-Chi Chuang | Curtain Pole Assembly Having Detachable Structure |
US8926216B2 (en) | 2011-03-11 | 2015-01-06 | Specialized Bicycle Components, Inc. | Adjustable assembly for a bicycle |
US9242688B2 (en) | 2011-03-11 | 2016-01-26 | Specialized Bicycle Components, Inc. | Adjustable assembly for a bicycle |
US10093372B2 (en) | 2011-03-11 | 2018-10-09 | Specialized Bicycle Components, Inc. | Adjustable assembly for a bicycle |
US10246155B2 (en) * | 2011-03-11 | 2019-04-02 | Specialized Bicycle Components, Inc. | Adjustable assembly for a bicycle |
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