| Title of Invention | HYDRAULIC FRICTION CLUTCH |
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| Abstract | A hydraulic friction clutch comprising: a driving shaft (1); a driven shaft (11) connected to the said driving shaft (1) through gears (2 and 4), outer bearing ring (6), needle rollers (7) and inner bearing ring (8); the gear (2) is mounted on the driving shaft (1); the gear (4) is fixedly mounted on the outer bearing ring (6) which in turn is mounted on said bearing inner ring (8) with said needle rollers (7) contact; the said inner bearing ring (8) is fixedly mounted on the said driven shaft (ii); a rotary distributor (10) is mounted on one end of the driven shaft (11) and is connected to a high pressure fluid inlet source; wherein a clearance is provided in between the bearing inner ring (8) and the driven shaft (11) for provision of high pressure hydraulic fluid which causes the bearing inner ring (8) to expand and the said expansion of bearing inner ring (8) causes friction between outer bearing ring (6) through needle rollers (7) resulting in the driven shaft (11) to be engaged to driving shaft (1) and the rotary movement is transmitted for transmission of torque. |
| Full Text | FORM 2 THE PATENTS ACT, 1970 (39 of 1970) & The PatentsRules,2003 PROVISIONAL / COMPLETE SPECIFICATION (See section 10 and rule 13) 1. TITLE OF THE INVENTION HYDRAULIC FRICTON CLUTCH 2.APPUCANT(S) (a) NAME: THAMMINENI VASU (b) NATIONALITY: INDIAN (c) ADDRESS: Flat No. L1-303, Empire Estate, Mumbai-Pune Highway, Chinchwad, Pune - 411019. 3. PREAMBLE TO THE DESCRITION COMPLETE The following specification particularly describes the invention and the manner in which it is to be performed Title of Invention Hydraulic Friction Clutch Field of Invention The field of invention relates to hydraulic friction clutch. The hydraulic friction clutch is used for engagement of driving and driven shaft as and when required. Background of known art In a known hydraulic friction clutch, the torque is transmitted due to axial pressure between the friction discs. A friction clutch connects a rotating shaft of a machine to a stationary shaft so that it may be made to rotate at speed of rotating shaft. The multiplate disc clutch consists of friction discs alternately connected to the driving and driven shaft by means of splines while mating set is keyed to the to inner surface of hub which is in turn rigidly connected to the driving shaft . The contact surface between the discs provide for necessary surfaces .The axial force necessary, to establish tangential friction between the friction discs for transmission of torque is applied through hydraulic or pneumatic means. Objectives of the Invention It is an object of the present invention to provide a hydraulic friction clutch, which is simple in construction and occupies less space and easy to use. According to the invention the objective is achieved by providing a small clearance in between the inner bearing surface and the driven shaft for provision of high pressure hydraulic fluid and to exert pressure on the inner bearing surface causing friction which results in the engagement of driven shaft to the driving shaft for torque transmission. 1 0 SEP 2008 Summary of the Invention A hydraulic friction clutch comprising a driven shaft (11) connected to the driving shaft (1) through gears (2 and 4), outer bearing ring (6), needle rollers (7) and inner bearing ring (8); wherein a clearance is provided in between the bearing inner ring (8) and the driving shaft (11) for provision of high pressure hydraulic fluid which causes the bearing inner ring (8) to expand. The expansion of inner ring (8) causes friction between outer ring (6) rollers (7) which cause the driven shaft (11) to be engaged to driving shaft (1) so that it may be made to rotate and transmit torque. Brief description of drawings The invention is illustrated in the drawing and will be apparent from the following description. Fig. 1 shows a section through a hydraulic friction clutch with a clearance provided in the bearing inner ring (8) bore for provision of high pressure hydraulic fluid for engagement and disengagement of driving shaft (1) with the driven shaft (11) as per the requirement according to the invention. Detailed description of the invention with reference to the drawing Fig. 1 shows a hydraulic friction clutch having a driving shaft (1) and a driven shaft (11) connected through gears (2 and 4). The gear (2) is mounted on the driving shaft (1) using a key (3). The gear (4) is fixed to support bearing outer ring (6) using bolts (5). The bearing outer ring (6) freely mounted over bearing inner ring (8) with needle rollers (7) in between them. The bearing inner ring (8) is clamped on driven shaft (11) using a clamping ring (9). A rotary distributor (10) is provided on one end of the driven shaft (11) and is connected to a high pressure fluid inlet source. A small clearance is provided in between the bore of inner ring (8) and driven shaft (11). A fluid flow path is shown which connects the rotary distributor (10) and the said clearance along the driven shaft (11). 1 0 SEP 2008 In operation, referring to FIG. 1, during engagement of clutch, high pressure fluid coming through the rotary distributor (10) flows into the clearance between the bore of inner ring (8) and driven shaft (11). This high pressure hydraulic fluid causes the bearing inner ring (8) to expand. The expansion of bearing inner ring (8) causes friction between bearing inner ring (8), Needle rollers (7) and Bearing outer ring (6) which causes the driven shaft (11) to be engaged to the driving shaft (l).so that it is made to rotate and transmit torque. During disengagement, high pressure hydraulic fluid flow to the clearance between the bearing inner ring (8) and driven shaft (11) is stopped. Due to the absence of the hydraulic fluid, no pressure is exerted on the needle rollers by the bearing inner ring (8). Therefore driving shaft (1) along with bearing outer ring (6) mounted on the bearing inner ring (8) with needle rollers rotates freely while the bearing inner ring (8) fixedly connected to the driven shaft (11) remains stationary. Therefore no torque is transmitted. During engagement of the above described hydraulic friction clutch, the maximum torque transmission of friction clutch without slippage is proportional to hydraulic pressure, number of needle rollers, and area of bearing inner ring bore contact area with the hydraulic fluid. Given the disclosure of the present invention, one versed in the art would appreciate that there may be embodiments and modifications within the scope and spirit of the present invention. Accordingly, all modifications attainable by one versed in the art from the present disclosure within the scope and spirit of the present invention are to be included as further embodiments of the present invention. The scope of the present invention accordingly is to be defined as set forth in the appended claims. I Claim 1. A hydraulic friction clutch comprising: a driving shaft (1); a driven shaft (11) connected to the said driving shaft (1) through gears (2 and 4), outer bearing ring (6), needle rollers (7) and inner bearing ring (8); the gear (2) is mounted on the driving shaft (1); the gear (4) is fixedly mounted on the outer bearing ring (6) which in turn is mounted on said bearing inner ring (8) with said needle rollers (7) contact; the said inner bearing ring (8) is fixedly mounted on the said driven shaft (ii); a rotary distributor (10) is mounted on one end of the driven shaft (11) and is connected to a high pressure fluid inlet source; wherein a clearance is provided in between the bearing inner ring (8) and the driven shaft (11) for provision of high pressure hydraulic fluid which causes the bearing inner ring (8) to expand and the said expansion of bearing inner ring (8) causes friction between outer bearing ring (6) through needle rollers (7) resulting in the driven shaft (11) to be engaged to driving shaft (1) and the rotary movement is transmitted for transmission of torque. 2. A hydraulic friction clutch as claimed in claim 1, wherein torque transmission from the driving shaft (1) to the driven shaft (11) depends on the pressure of hydraulic fluid, number of needle rollers and clearance area provided in between the bearing inner ring (8) and driven shaft (11). 3. A hydraulic friction clutch as claimed in claims 1 to 2 and as described here in with respect to the accompanying drawing. Dated this 16th day of March ,2006 By Applicant (T VASU) |
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368-MUM-2006-CANCELLED PAGES(10-9-2008).pdf
368-MUM-2006-CLAIMS(10-9-2008).pdf
368-mum-2006-claims(16-3-2006).pdf
368-mum-2006-claims(granted)-(10-9-2008).doc
368-mum-2006-claims(granted)-(24-10-2008).pdf
368-MUM-2006-CORRESPONDENCE(10-9-2008).pdf
368-mum-2006-correspondence(29-5-2006).pdf
368-mum-2006-correspondence(ipo)-(10-11-2008).pdf
368-mum-2006-description (complete).pdf
368-MUM-2006-DESCRIPTION(COMPLETE)-(10-9-2008).pdf
368-mum-2006-description(complete)-(16-3-2006).pdf
368-mum-2006-description(granted)-(24-10-2008).pdf
368-MUM-2006-DRAWING(10-9-2008).pdf
368-mum-2006-drawing(16-3-2006).pdf
368-mum-2006-drawing(granted)-(24-10-2008).pdf
368-MUM-2006-FORM 1(10-9-2008).pdf
368-mum-2006-form 1(16-3-2006).pdf
368-mum-2006-form 13(5-5-2008).pdf
368-mum-2006-form 18(29-5-2006).pdf
368-mum-2006-form 2(10-9-2008).pdf
368-mum-2006-form 2(16-3-2006).pdf
368-mum-2006-form 2(granted)-(10-9-2008).doc
368-mum-2006-form 2(granted)-(24-10-2008).pdf
368-MUM-2006-FORM 2(TITLE PAGE)-(10-9-2008).pdf
368-mum-2006-form 2(title page)-(16-3-2006).pdf
368-mum-2006-form 2(title page)-(granted)-(24-10-2008).pdf
368-mum-2006-form 3(16-3-2006).pdf
368-mum-2006-specification(amended)-(10-9-2008).pdf
| Patent Number | 224928 | ||||||||
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| Indian Patent Application Number | 368/MUM/2006 | ||||||||
| PG Journal Number | 02/2009 | ||||||||
| Publication Date | 09-Jan-2009 | ||||||||
| Grant Date | 24-Oct-2008 | ||||||||
| Date of Filing | 16-Mar-2006 | ||||||||
| Name of Patentee | THAMMINENI VASU | ||||||||
| Applicant Address | FLAT NO L1-303, EMPIRE ESTATE, MUMBAI PUNE HIGHWAY, CHINCHWAD, PUNE 411 019 INDIA | ||||||||
Inventors:
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| PCT International Classification Number | B 60K 17/35 | ||||||||
| PCT International Application Number | N/A | ||||||||
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