GB2589838A - Trailer hitch assembly - Google Patents
Trailer hitch assembly Download PDFInfo
- Publication number
- GB2589838A GB2589838A GB1916281.7A GB201916281A GB2589838A GB 2589838 A GB2589838 A GB 2589838A GB 201916281 A GB201916281 A GB 201916281A GB 2589838 A GB2589838 A GB 2589838A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tractor
- assembly
- hitch
- pivot
- attachment
- 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.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B59/00—Devices specially adapted for connection between animals or tractors and agricultural machines or implements
- A01B59/04—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines pulled or pushed by a tractor
- A01B59/042—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines pulled or pushed by a tractor having pulling means arranged on the rear part of the tractor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/01—Traction couplings or hitches characterised by their type
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B59/00—Devices specially adapted for connection between animals or tractors and agricultural machines or implements
- A01B59/06—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines mounted on tractors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/14—Draw-gear or towing devices characterised by their type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/24—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions
- B60D1/36—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for facilitating connection, e.g. hitch catchers, visual guide means, signalling aids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D49/00—Tractors
- B62D49/06—Tractors adapted for multi-purpose use
- B62D49/065—Coupling of multi-purpose tractors with equipment
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B59/00—Devices specially adapted for connection between animals or tractors and agricultural machines or implements
- A01B59/002—Details, component parts
- A01B59/008—Link connectors with spherical surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D2001/001—Traction couplings; Hitches; Draw-gear; Towing devices specially adapted for use on vehicles other than cars
- B60D2001/008—Traction couplings; Hitches; Draw-gear; Towing devices specially adapted for use on vehicles other than cars specially adapted for implements, e.g. towed tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Transportation (AREA)
- Zoology (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Agricultural Machines (AREA)
Abstract
A hitch assembly is for mounting an attachment such a baler or a digger arm on a tractor 1. assembly 2 comprises a first part 5 for mounting on the tractor 1 and a second part 6 for mounting on the attachment. Part 5 may be bolted to a tractor mounting plate 7 and part 6 to an attachment mounting plate 8. A connector assembly 10 interconnecting the two parts 5,6 comprises a male element 11 and a complementary female element 12. Retractable locking pins 14 on the male element 11 are releasably engageable within associated receiver sockets 15 on the female element 12 to releasably rigidly lock the elements 11,12. The first part 5 includes a pivot linkage to allow the connector assembly 10 to pivot in two mutually perpendicular directions. A turntable is rotatably mounted at an outer end of the first part 5 for rotating the male element 11 about a central longitudinal axis of the first part 5. The invention addresses safety and the time taken to connect attachments.
Description
Tractor Hitch Atssemtgy"
Introduction
This invention rotates in a tractor hitch assembly and to a tractor Incorporating the hitch assembly.
The invention particularly relates to a tractor hitch assembly for mounting an attachment on a tractor. The attachment may be a tool or implement such as a digger or a plough, or a trailer, baler or other apparatus that is used with tractors.
For convenience throughout this specification the term "attachment has been used to inciude all such toois, implements and attachments, In conventional tractors typically a three-point linkage is provided at a rear and of the tracthr for mounting such attachments on the tractor. These have worked well for many years. However, connecting attachments to and rekrasing attachments from the three-point linkage and connecting and releasing the associated hoses, etc. can be relativeiy time-consuming, There is also a safety aspect as it is sometimes necessary to climb on or between the tractor and attachment during engagement and disengagement of the atfacthment Further, tractors generally have a power pack comprising a dies& engine, Some attachments draw relatively high power from the diesel engine, howe.ver, much of the time a relatively ow power is required by the tractor. Therefore the.tractor operates under oparr-ium running conditions for only a portion of the time and overall operating efficiency of the tracter is relatively low..
The present invention is directed towards.providing an improved tractor and tractor hitch assembly.
Summary of the /nvention s
According to the invention there is provided a tractor hitch. assembly for mounting an attachment on a tractor., the hitch assembly being of two-part construction comprising a TirSt poet for mounting on the tractor and a second part for mounting on. the attachment each part having means for mounting the part on the tractor or on the attachment and a connector a-ssembiy comprising complementary reieasably ntelrengslgabie formations on the MG parts, the connector ass:anal-sly Dramatising 2 male element and e complementary feinale element for reception of the male element, and a lock to releasably rigidly lock the male element in engagement with the female element in one.embodiment of the invention the hitch assembly includes, a pivot linkage to allowthe connector assembly to Pivot in two mutually perpendicular directions, In another embodiment of thefl invention the pivot linkage is operable to pivot about a horizontal pivot axis and about a vertical pivot axis, in a further embodiment of the invention a load sensor is provided on the. bath assert* for sensing the load applied to the hitch assembly by the attachment during tate, and an actuator for the piwit linkage of the hitch assembly is operable in use in response to the sensed load to control. the distribution of load between the: tractotand the attachment, In one embodiment of the invention. the actuator is one or more, rams operable to pivot the pivot linkage about one or both pivot axes., In another nbodfrnenf of the invention a turntable is mounted on a hitch assembly pad for rotating the connector assembly, In a further embodiment of the invention the male element and the associated female element have a frusta-pyramidal shape, In one embodiment of the invention retractable locking pins are mounted on mating side faces of one or both of the male and the female.element, the looking pins beinq. engagabie with associated receiver.sockets in the other of the male element and the female element.
te one embodlinent of the invention the connector assembly includes an alignment device far the male element and the female element. Preferably: a laser alignment device is centrally mounted on: the male element for alignment of the male and female elemeMs upon ergaciement.
In another embodiment of the invention auxiliary services for operatingthe attachment are routed through the hith asseMbiy.
In.an.other aspect the invention. provides. a tractor incorporating the. tractor hitch assembly. Preferably the first Irtincludes the pivot linkage and the turntable.
In one embodiment of the invention the tractor is mounted on a pair of track assemblies, each track assembly being pivotally mounted on the tractor..
In another embodiment of We invention the tractor is mounted on two longitedinalY spaced-apart pairs of wheels, at least one pair of wheels being mounted for vertical movement on a chassis of the tractor.
"VI In a further embodiment of the invention a 380° iaaMera is mounted on the tractor and connects to an associated remote virtual reality.controller to control 'operation Of the traOtot the camera being: mounted within a transparent, dome., a wiper on the:dome 4SJ which is. operable to clean an outside face of the dome.
In one embodiment of the invention the dome includes a. heaterelement, In another embodiment of the invention the dome includes air jets to direct an air stream across the dome.
In one embodiment of the invention the tractor has an electrfcal power pack.
in-another embodiment of the invention the electrical power pack is powered by an internal combustion engine, in a further embodiment of the invention the:electrical power pack connects through the -hitch assembly with the attachment to drive the attacnmant, In a further embodliment of the invention the 'electrical power pack includes a eatiery which s connected to ge Aerated by the en for charging the battery with Po ver figtion of lie The invention wifi be cisarly understood by the falloWing description of soi embodiments thereot given,oniy, with reference accompanying drawih Whitt.
Fig. 1 is a rspectnie view of a tractor accordina to th ar perspective viewof the fractor; Fig, 3 is aside etevatk Fig, 4 evatkmai view of the tractor; is a an view of the Fig 6 tail side elevationa ctor and an associated tractor h a ccercling to the inv ion: Fig 7 5 a View sirni[ar to. Fig, 6 sh i-,,,, the tractor nected posit he hitch assembly; le pad shown in Fig, 8: p nerThve view of n ekavationsi view Fig, 10 isa plan view, of the female part shown Fig, 11 L. a rear perspective 'the r showing riby mounted Fig, 12 is an he actor ana hitch ass Fig, 13 is* a perspective view showing a baler connected to the tractor by the hitch assembly; Fig. 14 is an elevation& view showing the baler connected to the tractor; Fig. 15 is a perspective view showing a digger mounted on the hitch assembly of the tractor; and Fig. 16 is a plan view showing the (Jigger attachment mounted on the tractor.
Detailed Description or the Preferred Embodiments
Referring to the drawings, there is illustrated a tractor according to the invention indicated generally by the reference numeral 1 incorporating portion of a tractor hitch assembly according to another embodiment of the invention, indicated generally by the reference numeral 2, The hitch assembly 2 is %r mounting an attachment such a baler 'Fig. 14) or a digger arm 4 (Fig. 15) on the tractor 1.
2.0 Ref-err:rig in particular to Fig. 7: the hitch. assembly' 2 is of two part construction comprising a first part 5 for mounting on the tractor 1 -and a second part 6 for mounting on the attachment 3; 4, Each pact 5. 6 has means for mo.untina the pad 6 on the tractor 1, or on the attachment 3; 4 which rails case comprise triounting.plates 8-for bolting to the tractor 1 and to the attachment.3, 4 respectively, A connector assembly 10 for interppnnectina the twin. parts 5, 6 comprises a male element 11 and a complementary female element 12 tor.reception of the male element 11. Retractable rocking pins 14 on the niale element 11 are re:lees-ably 30. erigagable with associated receiver sockets 15 on. the female element 12 to releasably rigidly lock the male element 11 in engagement With the female element Referring in particular to Fig, 11 and. Fig, 12, the first pea 5 of the hitch assembly 2 includes a pivot linkage to allow the connector assembly 10 to pivot in two 'mutually -6 -perpendlcular directions, in this case the first part 5 has an articulated body with an:flier pen '16 pivotally mounted on the mcbriting plate 7 by a pivot pin 18 for pivoting the inner Part 16 about a horizontal pivot axis, Thai is to say the pivot axis is hortz001al when the tractor 1 is standing on a horizontal surface. An outer part 20 is pivotally mOunted on the inner part 18 by a pivot pi 22 for pivoting trie outer pad 20 relative to the inner part 16 about a vertical pivot axis, A turntable 24 is rotate* mounted at an outer end of the outer part 20 for rotating the male element 11 about a central brigitudinal axis A of the first part 5.
11he inner pad 16 and the outer part 20 each have a box-section body. The male element 11 at an outer and of the first part 5 of the hitch assembly 2 has a frusta-pyramidal shape with outwardly and inwardly sloping side faces 26 terminating in a flat rectangular end plate 27, The locking pins 14 retract into the male element 11 for engaging and disengaging with the female element 12 and move outwantily of each side face 26 to lack the male element 11 rigidly in erigagement with the fernale element 12. A laser alignment device 29 is mouilted within a central Slot M the end plate 27 for cooperation with the female eiernent 12 to correctly align the male element 11 and female element 12 for interangagement.
Referring in particular to Fig. 5 and Fig. 7 an accordion sty:6 flexible sleeve 30 is mounted on the first part Sip. protect the pivot linkage.
The second part 6 of the hitch assembly 2 also has a box section steel body 32 with the ttnounting plate 8 at the inner end for bolting to the attachment 3, 4 and the female element 12 of the connector assembly 10 at the free outer end.
Auxiliary' services such as an electric power supply and pneumatic:or hydra art pipes for connection ittetween. the tractor 1 and. the. attachment 3, 4 are routed through. the hitch assembly 2 Suitable connect= (not shown) ,we provided on the male element 11 and:the female element: 12 for coimecting the auxiliary services from the tractor to the attachment 3, 4.upon engagement of the connector assembly 10.
Referring in particular to. Fig" 1-1 and Fig, 12.. the tractor 1 is an autonomous dieselloas electric teeter and oo.mprises a steel chassis 40 which in this case is mounted On a pair of track assemblies 41, 42. A diesel electric power plant 44 (fig. $5 ted on tl is SUPPert frame.46 sided CrPS tin& 50 is movement of the de face of the dbme.53, Also, afr-jets may be provided SS' The dome to keep dust away from the. dome 6t,'.ffi ose, ea heater element to cope with frosty tonditio shown) to trot operation of the tr5ctor 1 instead of using the GPS ur desired, The camera 52 is mounted within a transparent dome 53 from dust and the A wiper (not shown) is provided on the dem is operable to dee to direct airst The dome 63 may Thus (wed stabilit ssernhly 41. 42 as shown in Fig. pivoted on the track assembiles 41. 42 for in 3 slope in use.
s 40 for ack ass lye arrer It wH be appre in an alte of wheels.
Movable on negotiating sbpes.
bikes 41, 42 have been Shc) -0.riet be mounted on spaced-both of the may he as PFeSte SlY when lower a frootendof or oh sacks 40 can be up or down *hcusd within a transparent canopy 45. A sic 40 comprises upward!y extending side arms 47 at terconnected at their upper ends by a cross-beam 48. unted on the oross-bearn 48 and Is operable to control 4y41 42 6 pivotay mounted the chassis 40 b a pivot connector iodate.-ends in a wrt cal olai paralle to a 1ong1tualnal axis of A ram 57 extends between the chassis 40 and a roll:er.carrying Plate 58 sembly 41, 42. The ram 57 isopenlble to 0, if tection which A $60 earner_ 52 iS also ma nted cross-beam 48 and eennec n the cross-aam. 48 on dated remote virtual rea Li tderside of the A battery (not show arranged such that the diesel engine can run at i ma to use togreatl 40. The power pac cat efficient speed. turn power is net being drawn by the attachment. 3, 4 excess power is used to e the battery. Thus it will be appreciated.that the diesel engine is run at optimum and any exe!prove the effic atso Motint04 on the ct power not required is stored in the battery for -8 -ihtee-peh: fink:age 70 or other connecter such as the hitch assembly 2 may be mounted 0.:se t a front end bite chassis. 40 for mounting attachments thereon when required.
ln use, the tractor 1 may be contmlied using the GPS unit 50, or the camera 52 and associated virtu& reality control unit, Coupling the tractor 1 up to an 'attachment 3, 4 is relatively simt.)le and quick by engaging the maid element 11 with the associated female element 12 and looking the elements. 11, 12 rigidY together, Upon coupling the connector assembly 10 auxiliary services for operating the attachment 3, '4 are automatically connected to the power supply from the tractor I. The pivots 18, 22 and mtator 24 of the first part 5 of the hitch assembly 2 can be operated for manoeuvring the attachment 3. 4. A load sensor on the hitch assembly 2 senses the load applied to the Nth assembly 2 hy the attachment 3, 4 d4rr use Rams associated 'ivith the pivots 18, 22 are operable to pivot the inner part 16 and outer pail 20 for controlling the distribution of load between the tractor 1 and the attachment 8. 4, In this specification the terms 'comprise, comprises, comprised and comprising or any variation thereof and the terms "include, inclucle,a, included and including" or any variation thereof are considered to be totally interchangeable and they should all be afforded the widest possible interpretation-The invention is not (rifted to the embodiments hereinbefore described which may he varied in both construction and detail within.the scope of the appended ciaims, -9 -
Claims (3)
- CLAIMSA trader hitch assembly for mounting an attachment on a tractor, the hitch assembly being of twcipatt onnstrurition comprising a ilifst part for mounting on the tractor and a second part for mounting on the attachment each part having means for *mounting, the part on the tractor or on the attachment, and a connector assembly comPrisingi comOlementary releasably interengagat4e*formations on the two parts the connecter assembly comprising a male elernebt and a complementary female element for reception of the mare element, and a lock to releasably rigidly lock the male element En engagement with the female element.
- 2- The tractor hitch assembly es claimed in claim I wherein the hitch assernbty includes a -Iiiivot.iinkage to allow the connector assembly.to piVot M two mutually perpendicular directions..
- 3. The treater hitch.assembly as claimed in. claim 2 wherein the pivot linkage is operable to pivot abouta horizontal pivotaxis and about a vertical pivot agis., 4, The tractor hitch assembly as claimed in any one of the preceding. .claims, wherein a load sensor is provided on the hitch assembly for sensing the lead appfied to lfte hitch assembiy by the attachme.nt during use, and an actuator for the pivot kage ol the hitch assembly is operable in use in response to the sensed load.to control the distribution of load between the tractor and the or attachment, The tractor hitch assembly as claimed in claim 4 wherein the actuator is One or more rams operable to pivot the pivot linkage, about ono pr both pivot axes, 6. The tractor hitch assembly as claimed in any one of the preceding claims, wherein a turntable is Mounted on a hitch assernialy pan for foliating connecter assembly, 7 The tractor hitch assembly as claimed in any one f,,4.* the preceding claims, wherein the mate tiilement and the associated female element have a frusta- -10 -pyramidal shape, The treater hitch asaerMblyas claimed in any one of the preceding claims, wherein retractable locking pins are mounted on mating side faces of one Or both of the mote and the fernale element, the!coking bins being angagabie with associated receiver sockets id the other of the male eletricrif and the female element The tractor hitch assembly as claimed in any one of the pref.:fading claims; %therein a laser aiignment device is atantraliy mounted on the male element for aligninent et the male and female dements upon engagement, The tractor hitch assembly as claimed in any one of the preceding. details, wherein auxiliarj servibet for operating the attachment are routed through the 16 hitch assembly.11:. A tractor incorporatinq. the tracter hitch awed-obis, as cifitirried in any preceding Claim, :wherein the first pail includes the pivot iihkage andithe turntable, 12, The tractor as ciaimed in claim 11 wherein: the tractor is mounted on a pair of track esSemblies, each track assembly being pivotally mounted' on the tractor, 13., The tractor as claimed in claim 11 wherein the tractor is mounted DTI two lortgitudiniefiy spaced-apart pairs of wheels, at least one pair of wheels. being 14, The 'tractor Os dein-led in any one of claims 11 to 13.wherein 660' cerrierid is mounted on the tractor and connects to an associated remote virtual Cal ty controller to con o' operation of the trebtor, the camera being mounted within a' transparent dome, a wiper on the dome which:it operable to clean an oiiitside. face Of the dome, 15, The tractor as claimed in claim 14.wherain the....dame includes a heater element.16, The tractor as claimed in claim 14 or clean 15 wherein the dome includes air jets mounted for vertical movement on a chassis of the tractor, to direct an to 10 :tor has an The tractor as cSrned in Power pack% 8 wherein the electrical p tachnient to drive the tor as dot Pack includes aba with excese power gen 7 to q he engine for irir) the battery The tractor a claimed in da by an intema power pack is pow
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1916281.7A GB2589838A (en) | 2019-11-13 | 2019-11-13 | Trailer hitch assembly |
| PCT/EP2020/081531 WO2021089879A1 (en) | 2019-11-08 | 2020-11-09 | Tractor hitch assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1916281.7A GB2589838A (en) | 2019-11-13 | 2019-11-13 | Trailer hitch assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201916281D0 GB201916281D0 (en) | 2019-12-25 |
| GB2589838A true GB2589838A (en) | 2021-06-16 |
Family
ID=69062349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1916281.7A Withdrawn GB2589838A (en) | 2019-11-08 | 2019-11-13 | Trailer hitch assembly |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2589838A (en) |
| WO (1) | WO2021089879A1 (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2420725A (en) * | 1944-08-11 | 1947-05-20 | Glen L Riggins | Coupling |
| US3891237A (en) * | 1974-03-29 | 1975-06-24 | Bill Allen | Trailer hitch |
| US4077234A (en) * | 1976-02-27 | 1978-03-07 | Crochet Sr Gerald J | Coupling apparatus |
| US4131295A (en) * | 1977-09-19 | 1978-12-26 | Clarence Highberger | Quick connect hitch assembly |
| GB2078079A (en) * | 1980-05-13 | 1982-01-06 | White David John | Coupling device |
| US20060138745A1 (en) * | 2004-02-13 | 2006-06-29 | Hensley James C | Trailer hitch with separated functions |
| US20060186625A1 (en) * | 2005-02-22 | 2006-08-24 | Terpsma Eric M | Baggage cart drawbar assembly |
| US20100117334A1 (en) * | 2008-11-10 | 2010-05-13 | Barry Harlin | Self-Locking, Universal Trailer Hitch and Method of Use Thereof |
| US20110193320A1 (en) * | 2010-02-11 | 2011-08-11 | Kramer Rodney M | Coupling Device And Method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19951840B4 (en) * | 1999-10-28 | 2009-01-08 | Deere & Company, Moline | Attachment interface for coupling implements to a work vehicle |
| DE10220998A1 (en) * | 2002-05-11 | 2003-11-27 | Deere & Co | Attachment device for a work vehicle |
| FR2845561B1 (en) * | 2002-10-09 | 2005-06-24 | Gregoire & Cie Besson | CONTROL DEVICE FOR SEMI-DOOR EQUIPMENT AND SEMI-DOOR EQUIPMENT, SUCH AS RUNNING, EQUIPPED WITH SUCH A DEVICE |
| GB2571131B (en) * | 2018-02-20 | 2020-05-27 | J Burrough & Co | A tow hook assembly |
-
2019
- 2019-11-13 GB GB1916281.7A patent/GB2589838A/en not_active Withdrawn
-
2020
- 2020-11-09 WO PCT/EP2020/081531 patent/WO2021089879A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2420725A (en) * | 1944-08-11 | 1947-05-20 | Glen L Riggins | Coupling |
| US3891237A (en) * | 1974-03-29 | 1975-06-24 | Bill Allen | Trailer hitch |
| US4077234A (en) * | 1976-02-27 | 1978-03-07 | Crochet Sr Gerald J | Coupling apparatus |
| US4131295A (en) * | 1977-09-19 | 1978-12-26 | Clarence Highberger | Quick connect hitch assembly |
| GB2078079A (en) * | 1980-05-13 | 1982-01-06 | White David John | Coupling device |
| US20060138745A1 (en) * | 2004-02-13 | 2006-06-29 | Hensley James C | Trailer hitch with separated functions |
| US20060186625A1 (en) * | 2005-02-22 | 2006-08-24 | Terpsma Eric M | Baggage cart drawbar assembly |
| US20100117334A1 (en) * | 2008-11-10 | 2010-05-13 | Barry Harlin | Self-Locking, Universal Trailer Hitch and Method of Use Thereof |
| US20110193320A1 (en) * | 2010-02-11 | 2011-08-11 | Kramer Rodney M | Coupling Device And Method |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201916281D0 (en) | 2019-12-25 |
| WO2021089879A1 (en) | 2021-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |