The present application relates to a braking system for a vehicle and, more particularly, to a master cylinder for a braking system.
Braking systems are used for on-road and off-road vehicles to provide braking power in response to a user input. In various braking systems, anti-lock braking systems (“ABS”) may be used on vehicles to facilitate the braking power in response to the user input. For example, the user may depress a brake pedal and/or a hand lever, thereby enabling the ABS to facilitate braking of the vehicle. The ABS may be configured to facilitate braking of the front wheels, the rear wheels, or both the front and rear wheels.
In present braking systems, depression of the brake pedal and/or the hand lever may result in uneven application of braking force between the front and rear wheels, resulting in the need for larger brake calipers and increased costs to compensate for more braking force being applied to the front or rear wheels compared to the other. This uneven application may be a result of the current master cylinder design in these braking systems. As such, there is a need for a master cylinder which may allow for even application of braking force to the front wheels and the rear wheels when the braking system is engaged such that smaller brakes may be utilized.
In one embodiment, a dual input master cylinder is provided comprising a housing having a first input, a piston base positioned within the housing, and a piston rod having a first end and a second end, the first end of the piston rod abutting the piston base and the second end of the piston rod acting as a second input of the dual input master cylinder, wherein the piston rod is capable of being spaced apart from the piston base.
In another embodiment, a braking system is provided comprising a hand brake member, a first master cylinder operably coupled to the hand brake member, a foot brake member, a dual input master cylinder operably coupled to the foot brake member and the hand brake member, the dual input master cylinder including a housing having a first input, a piston base positioned within the housing, a piston rod abutting the piston base, the piston rod capable of being spaced apart from the piston base within the housing, and an output positioned downstream of the piston rod and the piston base, and at least one splitter operably coupled to the dual input master cylinder.
Additional features and advantages of the present invention will become apparent to those skilled in the art upon consideration of the following detailed description of the illustrative embodiment exemplifying the best mode of carrying out the invention as presently perceived.
The foregoing aspects and many of the intended advantages of this invention will become more readily appreciated as the same becomes better understood by reference to the following detailed description when taken in conjunction with the accompanying drawings.
Corresponding reference characters indicate corresponding parts throughout the several views. Although the drawings represent embodiments of various features and components according to the present disclosure, the drawings are not necessarily to scale and certain features may be exaggerated in order to better illustrate and explain the present disclosure. The exemplifications set out herein illustrate embodiments of the invention, and such exemplifications are not to be construed as limiting the scope of the invention in any manner.
For the purposes of promoting an understanding of the principals of the invention, reference will now be made to the embodiments illustrated in the drawings, which are described below. The embodiments disclosed below are not intended to be exhaustive or limit the invention to the precise form disclosed in the following detailed description. Rather, the embodiments are chosen and described so that others skilled in the art may utilize their teachings. It will be understood that no limitation of the scope of the invention is thereby intended. The invention includes any alterations and further modifications in the illustrative devices and described methods and further applications of the principles of the invention which would normally occur to one skilled in the art to which the invention relates.
As shown in
Vehicle 2 generally includes a frame assembly 4 which supports a plurality of body panels 6 and is supported on a ground surface by a plurality of ground-engaging members 8. Illustratively, ground-engaging members 8 include front ground-engaging members 10 and rear ground-engaging members 12. In one embodiment of vehicle 2, each of front ground-engaging members 10 include a wheel assembly 10a and a tire 10b supported thereon. Similarly, each of rear ground-engaging members 12 may include a wheel assembly 12a and a tire 12b supported thereon. A front suspension assembly 27 may be operably coupled to front ground-engaging members 10 and a rear suspension assembly 28 may be operably coupled to rear ground-engaging members 12.
Referring still to
As shown in
Referring now to
With reference to
Illustratively, as shown in
Referring still to
Referring now to
With reference now to
Referring now to
Housing 90 generally includes a first input 102 (
Piston base 92 generally includes a first end 91 abutting piston rod 94, and a second end 93 having an extension 114 received within biasing member 96. Piston rod 94 generally includes a head 116 in abutment with first end 91 of piston base 92 and a piston body 118 extending out of housing 90. Head 116 includes a collar 120 configured to abut a second end 99 of end cap 98. In this way, piston rod 94 is separate and distinct from piston base 92 such that dual input master cylinder 50 includes a two-piece piston assembly, rather than a one-piece assembly.
With reference to
In operation, and referring to
In other words, the interface between head 116 of piston rod 94 and first end 91 of piston base 92 is separable such that the entirety of first end 91 piston base 92 is exposed to the pressurized hydraulic fluid. Because the hydraulic fluid from input 102, 102′ is pressurized and is applied to the entire surface of first end 91, piston base 92 moves towards output 113 to provide hydraulic braking fluid to output 113 for braking rear ground-engaging members 12. As such, braking at rear ground-engaging members 12 occurs at approximately the same time and with the same braking pressure as applied to front ground-engaging members 10. Therefore, through dual input master cylinder 50, 50′, the ratio of braking pressure applied to front ground-engaging members 10 to braking pressure applied to rear ground-engaging members 12 is approximately 1:1.
Referring again to
Additional details of braking assembly 40 may be disclosed in U.S. patent application Ser. No. 15/471,469, filed Mar. 28, 2017, and entitled “ANTI-LOCK BRAKE SYSTEM FOR ALL-TERRAIN VEHICLE”, and U.S. patent application Ser. No. 16/197,497, filed Nov. 21, 2018, and entitled “ANTI-LOCK BRAKE SYSTEM FOR UTILITY VEHICLE”, the complete disclosures of which is expressly incorporated by reference herein.
While this invention has been described as having an exemplary design, the present invention may be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains.
The present application is a continuation of U.S. patent application Ser. No. 17/031,019, filed on Sep. 24, 2020, and entitled “MASTER CYLINDER FOR A BRAKING SYSTEM,” which claims priority to U.S. Provisional Patent Application Ser. No. 62/907,292, filed on Sep. 27, 2019, and entitled “MASTER CYLINDER FOR A BRAKING SYSTEM,” the complete disclosures of which are expressly incorporated by reference herein.
Number | Name | Date | Kind |
---|---|---|---|
1567982 | Pfeiffer | Dec 1925 | A |
1606224 | Hoeller | Nov 1926 | A |
2313991 | Fitch | Mar 1943 | A |
2353755 | Price | Jul 1944 | A |
3159974 | Rodgers | Dec 1964 | A |
3436917 | Branson | Apr 1969 | A |
3473634 | Strifler et al. | Oct 1969 | A |
3486591 | Scheffler | Dec 1969 | A |
3554334 | Shimano et al. | Jan 1971 | A |
3750857 | Marschall et al. | Aug 1973 | A |
3868001 | Yokoi | Feb 1975 | A |
3885392 | Haraikawa | May 1975 | A |
3960030 | Williams | Jun 1976 | A |
3999807 | Haraikawa | Dec 1976 | A |
4024932 | Fay | May 1977 | A |
4161239 | Karasudani | Jul 1979 | A |
4174867 | Oberthur | Nov 1979 | A |
4176886 | Watanabe | Dec 1979 | A |
4189190 | Luepertz | Feb 1980 | A |
4239294 | Burgdorf | Dec 1980 | A |
4274518 | Berisch | Jun 1981 | A |
4289359 | Luepertz et al. | Sep 1981 | A |
4440452 | Burckhardt | Apr 1984 | A |
4465322 | Hayashi | Aug 1984 | A |
4494800 | Hayashi | Jan 1985 | A |
4598954 | Hayashi | Jul 1986 | A |
4979367 | Crescentini | Dec 1990 | A |
5036960 | Schenk et al. | Aug 1991 | A |
5219211 | Tsuchida et al. | Jun 1993 | A |
5273346 | Tsuchida et al. | Dec 1993 | A |
5363943 | Washita et al. | Nov 1994 | A |
5372408 | Tsuchida et al. | Dec 1994 | A |
5501511 | Wagner | Mar 1996 | A |
5524736 | Korshak | Jun 1996 | A |
5544946 | Toyoda et al. | Aug 1996 | A |
5564534 | Toyoda et al. | Oct 1996 | A |
5620237 | Iwashita et al. | Apr 1997 | A |
5628387 | Schantzen | May 1997 | A |
5971499 | Pape et al. | Oct 1999 | A |
6092877 | Rasidescu et al. | Jul 2000 | A |
6390566 | Matsuno | May 2002 | B1 |
6407663 | Huggett | Jun 2002 | B1 |
6478103 | Matsuura | Nov 2002 | B1 |
6772864 | Luh | Aug 2004 | B1 |
6793295 | Sakamoto | Sep 2004 | B2 |
6802400 | Ohura | Oct 2004 | B2 |
6814413 | Davison et al. | Nov 2004 | B2 |
6817434 | Sweet | Nov 2004 | B1 |
6835904 | Mcguire et al. | Dec 2004 | B2 |
6883630 | Morin | Apr 2005 | B2 |
7331640 | Koyama | Feb 2008 | B2 |
7431131 | Chevalier | Oct 2008 | B1 |
7695074 | Pongo | Apr 2010 | B2 |
8000870 | Dessouki | Aug 2011 | B2 |
8251461 | Atsushi | Aug 2012 | B2 |
10723334 | Pongo et al. | Jul 2020 | B2 |
11603082 | Pongo | Mar 2023 | B2 |
20020063010 | Morin | May 2002 | A1 |
20020088661 | Gagnon et al. | Jul 2002 | A1 |
20040011034 | Batchelor et al. | Jan 2004 | A1 |
20040035629 | Morin et al. | Feb 2004 | A1 |
20050183420 | Dasilva | Aug 2005 | A1 |
20050228568 | Hack et al. | Oct 2005 | A1 |
20060152071 | Takeuchi | Jul 2006 | A1 |
20060185943 | Takizawa et al. | Aug 2006 | A1 |
20070273200 | Pongo | Nov 2007 | A1 |
20100304930 | Poulin | Dec 2010 | A1 |
20110297462 | Grajkowski et al. | Dec 2011 | A1 |
20110315459 | Zuchoski et al. | Dec 2011 | A1 |
20160298744 | Bujold et al. | Oct 2016 | A1 |
20180065465 | Ward et al. | Mar 2018 | A1 |
20180257726 | Bagnariol et al. | Sep 2018 | A1 |
20180281764 | Pongo et al. | Oct 2018 | A1 |
20190185080 | Bezeau-Tremblay et al. | Jun 2019 | A1 |
20190210577 | Cha | Jul 2019 | A1 |
20210094522 | Kehren et al. | Apr 2021 | A1 |
Number | Date | Country |
---|---|---|
101704396 | May 2010 | CN |
107406094 | Nov 2017 | CN |
109466522 | Mar 2019 | CN |
102010031140 | Jan 2012 | DE |
995653 | Apr 2000 | EP |
1702822 | Sep 2006 | EP |
2868958 | May 2015 | EP |
2843349 | Feb 2004 | FR |
550450 | Jan 1943 | GB |
2264546 | Sep 1993 | GB |
H10218071 | Aug 1998 | JP |
2014-148308 | Aug 2014 | JP |
484550 | Apr 2002 | TW |
243401 | Sep 2004 | TW |
247468 | Oct 2004 | TW |
2007139673 | Dec 2007 | WO |
2018183452 | Oct 2018 | WO |
Entry |
---|
International Preliminary Report on Patentability issued by the International Searching Authority, dated Aug. 7, 2019, for International Patent Application No. PCT/US2018/024775; 19 pages. |
International Preliminary Report on Patentability received for PCT Patent Application No. PCT/US2020/052482, mailed on Apr. 13, 2022, 18 pages. |
International Search Report and Written Opinion issued by the International Searching Authority, dated Jul. 24, 2018, for International Patent Application No. PCT/US2018/024775; 10 pages. |
International Search Report and Written Opinion received for PCT Patent Application No. PCT/US2020/052482, mailed on Dec. 10, 2020, 7 pages. |
Invitation to Restrict or Pay Additional Fees, and, Where Applicable, Protest Fee, issued by the European Patent Office, mailed Apr. 4, 2019, for International Patent Application No. PCT/US2018/024775; 4 pages. |
Office Action issued by the Canadian Intellectual Property Office, dated Jul. 30, 2020, for Canadian Patent Application No. 3,055,074; 3 pages. |
Number | Date | Country | |
---|---|---|---|
20230192051 A1 | Jun 2023 | US |
Number | Date | Country | |
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62907292 | Sep 2019 | US |
Number | Date | Country | |
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Parent | 17031019 | Sep 2020 | US |
Child | 18108128 | US |