Patent US3741026A successfully refreshed from Google Patents.
US3741026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt drive apparatus having improved take up
Assignee: Palitex Project Co GmbH
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Filing: 1972-05-01
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Granted: 1973-06-26
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Expires: 1992-05-01
Abstract
Abstract A belt drive apparatus having a take-up for varying the tension in the belt including a driven rotatable member, belt engaging means which includes a pulley for receiving and driving a belt and which is driven through a first cylinder-piston which is in fluid communication with a second cylinder-piston operatively connected with displaceable belt engaging means for displacing the belt in conformity with the relative movement of the members of the first cylinder-piston relative to each other to vary the tension on the endless belt in accordance with the amount of torque on the belt driving pulley. The second cylinder-piston is secured coaxially to the driven rotatable member for rotation therewith and with the first cylinder-piston to eliminate problems in fluid communication between the first and second cylinder-piston devices.
Inventors
- 👤 Gustav Franzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:37
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/08; F16H7/10; F16H7/12; F16H7/1254; F16H7/1281; F16H7/14; F16H2007/0802; F16H2007/0806; F16H2007/0863; F16H2007/0874; F16H2342/00; F16H2342/04; F16H2342/044
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
262 words
In a belt drive apparatus having a take-up means for varying the tension in the belt including a driven rotatable member, endless belt means, belt engaging means including a pulley for receiving and driving said belt means which is coaxially arranged with and rotatable relative to said rotatable member and means displaceable with respect to said belt means to vary the tension on and tautness of said belt means, first fluid operable cylinder-piston means interposed between and drivingly connecting said rotatable member and said pulley and comprising a first and a second member movable relative to each other, said first member being pivotally connected to a portion of said pulley eccentrically located with regard to the axis of rotation of said pulley, said second member being pivotally connected to and carried by a part of said rotatable member which is eccentrically located with regard to the axis of rotation of said pulley, and second fluid operable cylinder-piston means in fluid communication with said first cylinder-piston means and operatively connected with said displaceable belt engaging means for displacing said belt means in conformity with the movement of said first and second members of said first cylinder-piston means relative to each other to vary the tension of said endless belt means in accordance with the amount of torque on said belt driving pulley; the improvement of: said second fluid operable cylinder-piston means being secured coaxially to said driven rotatable member for rotation therewith and with said first fluid operable cylinder-piston means to eliminate problems in fluid communication between said first and second cylinder-piston means.
Claim 2
Dependent Claim
262 words
In a belt drive apparatus having a take-up means for varying the tension in the belt including a driven rotatable member, endless belt means, belt engaging means including a pulley for receiving and driving said belt means which is coaxially arranged with and rotatable relative to said rotatable member and means displaceable with respect to said belt means to vary the tension on and tautness of said belt means, first fluid operable cylinder-piston means interposed between and drivingly connecting said rotatable member and said pulley and comprising a first and a second member movable relative to each other, said first member being pivotally connected to a portion of said pulley eccentrically located with regard to the axis of rotation of said pulley, said second member being pivotally connected to and carried by a part of said rotatable member which is eccentrically located with regard to the axis of rotation of said pulley, and second fluid operable cylinder-piston means in fluid communication with said first cylinder-piston means and operatively connected with said displaceable belt engaging means for displacing said belt means in conformity with the movement of said first and second members of said first cylinder-piston means relative to each other to vary the tension of said endless belt means in accordance with the amount of torque on said belt driving pulley; the improvement of: said second fluid operable cylinder-piston means being secured coaxially to said driven rotatable member for rotation therewith and with said first fluid operable cylinder-piston means to eliminate problems in fluid communication between said first and second cylinder-piston means.
Claim 3
Dependent Claim
61 words
In a belt drive apparatus having a take-up means, as set forth in claim 1, in which the distance between the pivotal connection of said first member of said first cylinder-piston means from the axis of rotation of said pulley is greater than the distance between the pivotal connection of said second member from the axis of rotation of said pulley.
Claim 4
Dependent Claim
45 words
In a belt drive apparatus having a take-up means, as set forth in claim 1, in which said means displaceable with respect to said belt means for varying the tension on and tautness of said belt means comprises said belt engaging and belt driving pulley.
Claim 5
Dependent Claim
53 words
In a belt drive apparatus having a take-up means, as set forth in claim 1, in which said means displaceable with respect to said belt means to vary the tension on and tautness of said belt means comprises tension roller means positioned along said belt for displaceable movement with respect to said belt.
Claim 6
Dependent Claim
153 words
In a belt drive apparatus, as set forth in claim 1, in which said apparatus further comprises movable frame means carrying said rotatable member, said pulley and said first and second cylinder-piston means, a fixed frame means carrying said movable frame means for allowing linear movement of said movable frame means and said components carried thereby, and third fluid operable cylinder-piston means comprising a first and second member movable relative to each other in which said first member is connected with said movable frame means and said second member is connected with said fixed frame means, said third cylinder-piston means being in fluid communication with said second cylinder-piston so that said first and second members of said third cylinder-piston means will move relative to each other upon reception of fluid from said second cylinder-piston means to move said movable frame and said pulley for varying the tension and tautness in said belt means.
Claim 7
Dependent Claim
131 words
In a belt drive apparatus having a take-up means, as set forth in claim 1, in which said second fluid operable cylinder-piston means comprises a first and second member movable relative to each other, said means displaceable with respect to said belt means to vary the tension on and tautness of said belt means comprises tension roller means positioned along said belt means for movement into and out of engagement with said belt means for varying the tension thereon, said second cylinder-piston means being operatively connected to said tension roller means to move said tension roller means into and out of engagement with said belt means for varying the tension of said belt means in accordance with the relative movement between said first and second members of said second cylinder-piston means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |