Source: http://www.google.com/patents/US7168879?dq=7125605
Timestamp: 2014-12-25 16:08:30
Document Index: 488083127

Matched Legal Cases: ['art.\n7', 'art 6', 'art 8', 'art 6', 'art 8', 'art 6', 'art 8', 'art 6', 'art 8', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6']

Patent US7168879 - Plug-in coupling allowing for compensating movements - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA plug-in coupling for removably interconnecting a first structural member and a second structural member comprises a resiliently deformable female coupling part adapted to be inserted into a socket at the first structural member such that it is retained therein. The female coupling part comprises a...http://www.google.com/patents/US7168879?utm_source=gb-gplus-sharePatent US7168879 - Plug-in coupling allowing for compensating movementsAdvanced Patent SearchPublication numberUS7168879 B2Publication typeGrantApplication numberUS 10/447,084Publication dateJan 30, 2007Filing dateMay 28, 2003Priority dateOct 31, 2002Fee statusPaidAlso published asDE20216836U1, DE50301911D1, EP1416172A1, EP1416172B1, US20040086324Publication number10447084, 447084, US 7168879 B2, US 7168879B2, US-B2-7168879, US7168879 B2, US7168879B2InventorsAndreas Bertram, Rainer S�ssenbachOriginal AssigneeBollhoff GmbhExport CitationBiBTeX, EndNote, RefManPatent Citations (23), Referenced by (4), Classifications (9), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetPlug-in coupling allowing for compensating movementsUS 7168879 B2Abstract A plug-in coupling for removably interconnecting a first structural member and a second structural member comprises a resiliently deformable female coupling part adapted to be inserted into a socket at the first structural member such that it is retained therein. The female coupling part comprises a ball-shaped cup, an intermediate annular wall integral with said ball-shaped cup and serving as a guide portion, and a tubular external wall integral with said annular intermediate wall. The external wall surrounds at least a part of the ball-shaped cup in spaced relation thereto and engages a peripheral wall of the socket when the female coupling part is inserted into the socket. A male coupling part comprises a ball-shaped head and a fixing portion for securing the male coupling part to the second structural member. The intermediate annular wall of the female coupling part is of an undulated shape at least in a certain area thereof.
a resiliently deformable female coupling part adapted to be inserted into a socket at said first structural member such that the female coupling part is retained therein,
said female coupling part comprising a ball-shaped cup, a conical portion integral with said ball-shaped cup and serving as a guide portion, an intermediate annular wall integral with said conical portion, and a tubular external wall integral with said intermediate annular wall, said tubular external wall surrounding at least a part of the ball-shaped cup in spaced relation thereto, and the tubular external wall engaging a peripheral wall of said socket when said female coupling part has been inserted into said socket, and
said intermediate annular wall of said female coupling part, in an axial cross-section thereof, being of an undulated profile at least in a certain area thereof,
wherein said undulated profile comprises a single axially directed annular bulge of said intermediate annular wall, said bulge having internal and external walls and webs extending therebetween for stiffening said bulge in an axial direction.
2. The plug-in coupling of claim 1 wherein said webs extend substantially tangentially to said internal wall of said bulge.
3. The plug-in coupling of claim 2 wherein said webs are arranged in pairs such that the webs of any pair thereof are inclined in opposite circumferential directions.
4. The plug-in coupling of claim 1 wherein said annular bulge is integrally connected to said tubular external wall of said female part adjacent an axial end of said tubular external wall.
5. The plug-in coupling of claim 1 wherein said annular bulge is integrally connected to said tubular external wall of said female part in an intermediate area of said tubular external wall.
6. The plug-in coupling of claim 5 wherein longitudinally extending stiffening ribs are provided at an internal surface of said tubular external wall of said female coupling part and extend from said intermediate area to an axial end of said tubular external wall of said female part.
7. The plug-in coupling of claim 1 wherein said intermediate annular wall of said female coupling part is of uniform wall thickness.
8. The plug-in coupling of claim 1 wherein said annular intermediate wall of said female coupling part is of a wall thickness increasing in a radially outwards direction.
9. The plug-in coupling of claim 1 wherein said ball-shaped head of said male coupling part is overdimensioned with respect to the ball-shaped cup of the female coupling part so as to provide for the ball-shaped head to be received within the ball-shaped cup without any play even when the ball-shaped head and the ball-shaped cup are subject to different thermal expansions.
10. The plug-in coupling of claim 9 wherein said ball-shaped cup has an internal spherical surface merging into the conical portion at an open end thereof, said conical portion extending radially inwards with respect to said spherical surface so as to provide for increased retention forces acting upon said ball-shaped head when the plug-in coupling is in a closed condition.
11. The plug-in coupling of claim 1 wherein said female coupling part is made of a thermoplastic elastomeric material based on a polyester having chemical resistance and thermal dimensional resistance.
12. The plug-in coupling of claim 11 wherein said elastomeric material is polybutylene terephthalate or polyethylene terephthalate.
13. The plug-in coupling of claim 1 wherein said female coupling part is made of cross-linked elastomeric material.
14. A female coupling part for a plug-in coupling for removably inter-connecting a first structural member and a second structural member, said female coupling part being resiliently deformable so as to be adapted to be inserted into a socket at said first structural member for positive retention therein,
said female coupling part comprising a ball-shaped cup, a conical portion integral with said ball-shaped cup and serving as a guide portion, an intermediate annular wall integral with said conical portion, and a tubular external wall integral with said intermediate annular wall, said tubular external wall surrounding at least a part of the ball-shaped cup in spaced relation thereto, and the tubular external wall engaging a peripheral wall of said socket when said female coupling part has been inserted into said socket,
15. A socket and a female coupling part, in combination, for a plug-in coupling for removably interconnecting a first structural member and a second structural member,
said female coupling part being resiliently deformable so as to be adapted to be inserted into said socket to be provided at said first structural member for positive retention therein, and
comprising a ball-shaped cup, a conical portion integral with said ball-shaped cup and serving as a guide portion, an intermediate annular wall integral with said conical portion, and a tubular external wall integral with said intermediate annular wall, said tubular external wall surrounding at least a part of the ball-shaped cup in spaced relation thereto, and the tubular external wall engaging a peripheral wall of said socket when said female coupling part has been inserted into said socket,
said intermediate annular wall of said female coupling part, in an axial cross-section, being of an undulated profile at least in a certain area thereof,
16. The socket and female coupling part of claim 15 wherein said peripheral wall of said socket is laterally open and has an axial end provided with an annular collar extending radially inwards for supporting a rim of said tubular external wall of said female coupling part and being provided with a lateral opening for inserting said female coupling part into the socket.
BACKGROUND OF THE INVENTION The present invention relates to a plug-in coupling for removably inter- connecting a first structural member and a second structural member.
Applicant's U.S. Pat. No. 6,206,604 B1 discloses a plug-in coupling comprising a resiliently deformable female coupling part and a male coupling part. The female coupling part is adapted to be inserted into a socket provided at the first structural member such that it is positively retained therein. It comprises a ball-shaped cup, a tubular external wall, and an intermediate annular wall therebetween. The tubular external wall surrounds the ball-shaped cup in spaced relationship thereto and comes into engagement with a peripheral wall of the socket when the female coupling part is inserted into the socket. The male coupling part comprises a ball-shaped head and a fixing portion adapted to be secured to the second structural member.
SUMMARY OF THE INVENTION It is an object of the present invention to provide an improved plug-in coupling which provides for a vibrational decoupling feature not only transverse to the axis of the plug-in coupling but also in any other directions.
This allows to make the female coupling part of a more rigid material. While it is still possible to make the female coupling part of a relatively soft inter-linked elastomeric material, in particular a rubber or caoutchouc material, the female coupling part preferably is made of elastomeric material based on polyester of high chemical resistance and high thermal dimensional resistance. Preferred materials are polybutylene terephthalate (PBT) and polyethylene terephthalate (PET). These materials are of significantly higher Shore hardness than inter-linked thermoplastic elastomeric materials such as rubber or caoutchouc. As a result thereof the plug-in coupling of the invention may be designed so as to be of increased resistance to disengagement therof in order to reduce the risk of inadvertent disengagement of the coupling. Apart from their increased chemical resistance these materials are particularly well suited high precision injection molding, finishing operations on the female coupling part are not required. The high thermal resistance (150� C. and more) of these materials enable the use of the plug-in coupling also in thermally critical applications such as in close relationship to an automotive combustion engine.
BRIEF DESCRIPTION OF THE DRAWINGS For the purpose of facilitating an understanding of the invention, there are illustrated in the accompanying drawings preferred embodiments thereof, from an inspection of which when considered in connection with the following description, the invention, its construction and operation, and many of its advantages should be readily understood and appreciated.
FIG. 1 is a longitudinal cross-section of a plug-in coupling of the invention in its mounted and engaged position;
FIGS. 2 and 3 are sectional views taken generally along the line II�II and, respectively, III�III in FIG. 1;
FIG. 4 is a longitudinal cross-section of the female coupling part of the plug-in coupling in FIG. 1;
FIG. 5 is a top view of the female coupling part in FIG. 4;
FIG. 6 is a bottom view of the female coupling part in FIG. 4;
FIG. 7 is a perspective top view of the female coupling part in FIG. 4;
FIG. 8 is a perspective bottom view of the female coupling part in FIG. 4;
FIG. 9 is a longitudinal cross-section, similar to FIG. 1, of a modified embodiment of the female coupling part, not showing the male coupling part;
FIG. 10 is a longitudinal section of the female coupling part of the plug-in coupling in FIG. 9;
FIG. 11 is a bottom view of the female coupling part of FIG. 10;
FIG. 12 is a longitudinal cross-section of a further embodiment of the female coupling part;
FIG. 13 is an enlarged partial view of the female coupling part on one side of the midline as shown in FIG. 4;
FIG. 14 is an enlarged partial view of the female coupling part on one side of the midline as shown in FIG. 10 and FIG. 12;
FIG. 15 is an enlarged partial view of the ball-shaped cup of the female coupling part of a plug-in coupling of the invention;
FIG. 16 is an enlarged partial sectional view similar to FIG. 15, with the male coupling part being indicated by dash dotted lines.
DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference to FIG. 1, the plug-in coupling shown therein is intended to removably interconnect a first structural member 2 (2 a in FIG. 9) and a second structural member 4 which may be e.g. a removable cover and, respectively, a frame of an automotive vehicle (not shown). The plug-in coupling comprises a female coupling part 6 and a male coupling part 8. The female coupling part 6 is adapted to be inserted into a socket 10 of the structural member 2, and the male coupling part 8 is adapted to be secured to the structural member 4.
As shown in FIGS. 10 and 14, the interior of the bulge 28 is provided with a plurality of webs 30 which interconnect the internal wall 28 a (128 a of FIG. 13) of the bulge 28 and the external wall 28 b (128 b of FIG. 13) thereof. As shown in particular in FIGS. 6 and 8, the webs 30 extend substantially tangentially to the internal wall 28 of the bulge 28. The webs 30 are arranged in pairs such that the webs 30 of any pair thereof are inclined in opposite circumferential directions. The webs 30 prevent axial deflections or deformations of the bulge 28 as will be explained in more detail below.
As mentioned above, the female coupling part 6 is preferably made of elastomeric material based on polyester, in particular polybutylene terephthalate (PBT) or polyethylene terephthalate (PET). While these materials are resiliently deformable, they are of relatively high Shore hardness and excellent thermal dimensional resistance (150� C. and more). Furthermore, they are of good chemical resistance, in particular diesel oil resistance. However, other materials such as inter-linked elastomeric materials, in particular rubber/caoutchouc may be also used as already mentioned above. The male coupling part 8 is made for example of plastic material reinforced by a filler, or of metallic material.
When the female part 6 has been mounted to its associated structural member 4 in the above described manner, engagement of the plug-in coupling requires merely to insert the male coupling part 8 axially into the female coupling part 6 by relative movement between the structural members 2 and 4 so as to snap the ball-shaped head 32 into the ball-shaped cup 20. The ball-shaped head 32 will then be surrounded and engaged by the ball-shaped cup 20 over more than half of its outer surface.
When the plug-in coupling is in its mounted and assembled position, it provides, due to its geometrical structure and the used material, for vibrational decoupling of the structural members 2 and 4, and this both in axial and radial directions and also in any intermediate directions. The compensating movements of the plug-in coupling enabling the vibrational decoupling effect are enabled by the undulated intermediate wall 22 of the female coupling part 6. The annular bulge 28 of the intermediate wall 22 provides for the necessary resiliency of the female coupling part 6 in axial directions. The webs 30, which prevent deflection and rolling of the bulge 28, accommodate compensating movements in radial directions due to their tangential structure. Furthermore, the webs 30 are sufficiently resilient to recover, i.e. to re-center, the bulge after having performed compensating movements.
The modified embodiment of the female coupling part 6 a shown in FIGS. 9 to 11 and 14 is substantially similar with respect to its structure and function to the female coupling part of the above described embodiment. A difference is that in the embodiment of FIGS. 9 to 11 and 14 the outer diameter of the female coupling part 6 a and therefore the radial spacing between the ball-shaped cup 20 and the tubular peripheral wall 24 a is smaller than in the preceding embodiment. This results in a modified geometry of the bulge 29, compared to bulge 28 described above, insofar as its external wall 28 b does not extend to the lower axial end of the tubular external wall 24 a but rather merges into the tubular external wall 24 a in an intermediate area thereof as shown also in FIG. 14. While the bulge 28 of the embodiment of FIGS. 4 to 6 and 13 in an axial cross-section thereof is greater than a half-wave, the bulge 29 of the embodiment of FIGS. 9 to 11 and 14 is smaller than a half-wave. The functional behavior thereof, however, remains the same.
A further difference is that in the embodiment of FIGS. 9 to 11 and 14 longitudinally extending stiffening ribs 40 are provided on the internal side of the tubular external wall 24 a. The stiffening ribs 40 extend from the position where the intermediate wall 22 merges into the tubular external wall 24 a to the axial end of the tubular external wall 24 a. The stiffening ribs 40 allow an axial extension of the tubular external wall 24 to be of extremely thin wall thickness.
Furthermore, in the embodiment of FIGS. 9 to 11 and 14 an annular, radially projecting extension 38 is provided at the lower axial end of the female coupling part 6 a. Between the lower edge of the tubular external wall 24 a and the annular extension 38 there is provided an annular groove 44 adapted to snappingly receive the lower collar 14 of the socket 10. This provides for the female coupling part to be positively retained within the socket 10 even though the upper edge of the tubular external wall 24 a does not engage the upper collar 18 of the socket 10.
The embodiment of the female coupling part 6 b shown in FIG. 12 is similar to the embodiment of FIGS. 9 to 11 and 14, wherein like components have been designated with like numerals, except that the annular extension 38 has been dispensed with. Positive retention of the female coupling part within the socket 10 must therefore be obtained in the manner shown in FIG. 1. Otherwise operation of the female coupling part 6 in FIG. 12 is the same as that of the preceding embodiments.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS2754141 *Jan 2, 1953Jul 10, 1956Firm A Ehrenreich & CieBall and socket jointsUS3290073 *Jul 12, 1963Dec 6, 1966Ehrenreich & Cie ABall and socket jointsUS3389926 *Nov 16, 1965Jun 25, 1968Messrs A Ehrenreich & CieBall joints, especially in the form of angular jointsUS3591192 *Jun 2, 1969Jul 6, 1971Angus George Co LtdProtective gaiters for mechanical equipmentUS3916756 *Feb 21, 1974Nov 4, 1975Nifco IncCoupling deviceUS4069617 *May 26, 1976Jan 24, 1978Nissan Motor Co., Ltd.Vehicle window guide assemblyUS4326307 *Jan 22, 1980Apr 27, 1982Baillie Kenneth DReleasable toilet seat clampUS4778320 *Jun 19, 1986Oct 18, 1988Nifco, Inc.Fastener for coupling together two panels in face-to-face relationUS5120151 *Aug 26, 1991Jun 9, 1992General Motors CorporationRoller guide alignment for a vehicle doorUS5297322 *Nov 4, 1992Mar 29, 1994Trw United Carr Gmbh & Co. KgConnection between a support and a plate elementUS5329677 *Jun 24, 1993Jul 19, 1994Yoshida Kogyo K.K.Fastener assemblyUS5580204 *Mar 7, 1995Dec 3, 1996Textron Inc.Panel attachment systemUS5647713 *May 22, 1996Jul 15, 1997Trw Inc.Plastic panel fastener and method of forming the sameUS5653548 *Feb 7, 1996Aug 5, 1997Illinois Tool Works Inc.Method and apparatus for a ball and socket jointUS5771234 *Dec 6, 1995Jun 23, 1998Industrial Technology Research InstituteMethod and system for ATM cell multiplexing under constant bit rate, variable bit rate and best-effort trafficUS6113302 *Jun 24, 1996Sep 5, 2000Lemforder Metallwaren AgBall-and-socket joint for wheel suspensions in motor vehiclesUS6206604 *Sep 10, 1998Mar 27, 2001Bollhoff GmbhPlug-in couplingUS6276652May 15, 1996Aug 21, 2001Filterwerk Mann & Hummel GmbhSecuring componentUS6374468 *Jun 23, 2000Apr 23, 2002Vermillion CorporationHighly compliant retention mechanism for attaching and quickly releasing componentsUS6817337 *Jan 21, 2004Nov 16, 2004Daimlerchrysler CorporationCover connectorGB2352492A * Title not availableJPH0251614A * Title not availableJPS62297525A * Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7922413 *Apr 18, 2005Apr 12, 2011Airbus Deutschland GmbhConnecting elementUS8065983Jul 1, 2009Nov 29, 2011Ford Global Technologies LlcEngine cover having a retainer to secure an engine accessoryUS8256395Jul 1, 2009Sep 4, 2012Ford Global Technologies, LlcEngine cover having a retainer to secure an engine accessoryUS8800518Oct 10, 2011Aug 12, 2014Ford Global Technologies, LlcEngine cover having a retainer to secure an engine accessory* Cited by examinerClassifications U.S. Classification403/135, 403/133, 403/51, 403/132, 403/50International ClassificationF16B21/07, F16C11/00Cooperative ClassificationF16B21/073European ClassificationF16B21/07LLegal EventsDateCodeEventDescriptionAug 24, 2010SULPSurcharge for late paymentAug 24, 2010FPAYFee paymentYear of fee payment: 4May 23, 2003ASAssignmentOwner name: BOLLHOFF GMBH, GERMANYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BETRAM, ANDREAS;SUSSENBACH, RANIER;REEL/FRAME:014130/0938Effective date: 20030519RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google