US3818782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the speed of a transmission with balancing means for a fluid regulator valve
Assignee: Voith Getriebe KG
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Filing: 1973-05-10
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Granted: 1974-06-25
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Expires: 1993-05-10
Abstract
Abstract For driving the two tracks of a track laying vehicle at different speeds in a curve, left and right drive elements are connected by differential transmissions with a drive shaft and with a control shaft which is connected by other differential transmissions with the rotors of fluid brake devices, and with another drive shaft. The brake devices are only effective when filled with fluid under the control of a regulating valve piston. First sensing means measure the speed of the drive shaft means and produce first fluid pressure signals for operating a control piston. Second sensing means measure the speed of the control shaft or of a part connected thereto in linear speed relation, and produce second fluid pressure signals for operating a regulating piston. A double-armed balancing lever has arms engaged by the control piston and the regulating piston, respectively, so that a position of equilibrium is obtained when the left and right drive elements rotate at a desired speed. When one of the brake devices is filled and exerts a brake action, the drive elements rotate at a different speed for moving the vehicle in a curve. The control piston has a cylinder which can be manually moved along the respective arm of the balancing lever to change the effective lever arm of the control piston in accordance with the desired speed so that the balancing lever is displaced until the desired speed becomes the actual speed.
Inventors
- 👤 W Armasow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:22
CPC Classifications
B; B62; B62D; B62D11/00; B62D11/02; B62D11/06; B62D11/10; B62D11/14; B62D11/18; B62D11/183; B60; B60T; B60T1/00; B60T1/02; B60T1/08; B60T1/087; F; F16; F16D; F16D33/00; F16D33/06; F16D33/08; F16D33/10; F16D57/00; F16D57/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
290 words
Apparatus for controlling the speed of a transmission, comprising drive shaft means; first sensing means for measuring the speed of said drive shaft means and for producing a corresponding first fluid pressure signal; a control cylinder, a control piston in said control cylinder forming a pressure chamber having an inlet for receiving said first fluid pressure signal whereby pressure is applied to said control piston; a transmission; second sensing means for measuring the speed of said transmission and for producing a corresponding second fluid pressure signal; filling regulating valve means including a regulating cylinder, a regulating piston in said regulating cylinder forming a pressure chamber having an inlet for receiving said second fluid pressure signal whereby pressure is applied to said regulating piston, said regulating piston forming in said regulating cylinder a regulating valve; a balancing means turnable about an axis and having on opposite sides of said axis, first and second portions engaged by said control piston and said regulating piston, respectively, for holding said balancing means normally in a position of equilibrium; fluid operated means connected with said transmission for influencing the speed thereof, and including a filling conduit controlled by said regulating valve when said regUlating piston is displaced in said regulating cylinder by said balancing means; and actuating means connected with one of said cylinders for moving the respective piston along the respective portion of said balancing means toward and away from said axis to a position representing the desired speed of said transmission so that said regulating piston is displaced in said regulating cylinder and said regulating valve operated to cause filling of said fluid operated means and a variation of the speed of said transmission to said desired speed by said fluid operated means.
Claim 2
Dependent Claim
290 words
Apparatus for controlling the speed of a transmission, comprising drive shaft means; first sensing means for measuring the speed of said drive shaft means and for producing a corresponding first fluid pressure signal; a control cylinder, a control piston in said control cylinder forming a pressure chamber having an inlet for receiving said first fluid pressure signal whereby pressure is applied to said control piston; a transmission; second sensing means for measuring the speed of said transmission and for producing a corresponding second fluid pressure signal; filling regulating valve means including a regulating cylinder, a regulating piston in said regulating cylinder forming a pressure chamber having an inlet for receiving said second fluid pressure signal whereby pressure is applied to said regulating piston, said regulating piston forming in said regulating cylinder a regulating valve; a balancing means turnable about an axis and having on opposite sides of said axis, first and second portions engaged by said control piston and said regulating piston, respectively, for holding said balancing means normally in a position of equilibrium; fluid operated means connected with said transmission for influencing the speed thereof, and including a filling conduit controlled by said regulating valve when said regUlating piston is displaced in said regulating cylinder by said balancing means; and actuating means connected with one of said cylinders for moving the respective piston along the respective portion of said balancing means toward and away from said axis to a position representing the desired speed of said transmission so that said regulating piston is displaced in said regulating cylinder and said regulating valve operated to cause filling of said fluid operated means and a variation of the speed of said transmission to said desired speed by said fluid operated means.
Claim 3
Dependent Claim
34 words
Apparatus as claimed in claim 1, wherein said first and second sensing means are first and second measuring means for measuring rotary speeds and for representing measured rotary speeds by corresponding fluid pressure variations.
Claim 4
Dependent Claim
58 words
Apparatus as claimed in claim 1, wherein said actuating means includes a slide fixed to said control cylinder, and being mounted for movement along said first portion of said balancing means so that the effective lever arm of the pressure exerted by said control piston on said first portion is varied in accordance with a selected desired speed.
Claim 5
Dependent Claim
27 words
Apparatus as claimed in claim 1, wherein said control piston and said regulating piston have free end faces with centrally located projecting studs abutting said balancing means.
Claim 6
Dependent Claim
25 words
Apparatus as claimed in claim 4, wherein said balancing means includes a double-armed lever having first and second arms forming said first and second portions.
Claim 7
Dependent Claim
36 words
Apparatus as claimed in claim 5, wherein said lever is an angular lever, and wherein said control piston and said regulating piston move at right angles to each other and to said first and second arms.
Claim 8
Dependent Claim
71 words
Apparatus as claimed in claim 1, wherein said fluid operated means includes an inlet for said filling conduit, and an outlet port opening into said regulating cylinder, said regulating cylinder having a discharge outlet; and wherein said regulating piston has an edge cooperating with said outlet port to form said regulating valve, said outlet port being varied when said regulating piston is displaced in said regulating chamber by said balancing means.
Claim 9
Dependent Claim
145 words
Apparatus as claimed in claim 1, wherein said transmission includes a second drive shaft, rotary drive elements at the ends of said second drive shaft, a control shaft, first differential transmission means connecting said rotary drive elements with said second drive shaft and said control shaft so that the speed of said drive elements is different when said control shaft rotates or stops, respectively, second differential transmission means connecting said first drive shaft and said fluid operated means with said control shaft so that the speed of said control shaft is different when said fluid operated means is empty and filled, respectively, by said filling conduit; and wherein said first sensing means measure the speed of said drive shaft means, and said second sensing means measure the speed of the part of said second differential transmission means which is connected with said fluid operated means.
Claim 10
Dependent Claim
51 words
Apparatus as claimed in claim 8, wherein said fluid operated means includes a stationary part and a rotary part braked by said stationary part when said regulating piston is displaced in said regulating cylinder and said regulating valve permits filling of said fluid operated means with fluid from said filling conduit.
Claim 11
Dependent Claim
47 words
Apparatus as claimed in claim 8, wherein said actuating means includes a manually operated part for selecting a desired speed of said drive element, and being connected with said control cylinder for moving said control piston along said balancing means to a position representing the desired speed.
Claim 12
Dependent Claim
130 words
Apparatus as claimed in claim 10, comprising first and second filling regulating valve means, and first and second control pistons, wherein said fluid operated means include first and second fluid operated fluid brake devices having rotors and stators and being controlled by said fiRst and second filling regulating valve means; wherein said second differential transmission means include first and second differential transmissions connecting said rotors of said first and second brake devices with said control shaft and with said drive shaft means, so that said rotors rotate at the same speed when said control shaft is stopped whereby filling of one of said brake devices due to operation of said manually operated part causes a speed reduction of the respective rotor, and a speed increase of the respective other rotor.
Claim 13
Dependent Claim
61 words
Apparatus as claimed in claim 11, wherein said second sensing means include two second measuring elements for measuring the speeds of said rotors and of said control shaft, and wherein each second measuring element is connected with said inlet of said pressure chamber of the regulating cylinder of the respective other regulating valve means for supplying thereto a fluid pressure signal.
Claim 14
Dependent Claim
54 words
Apparatus as claimed in claim 12, wherein the speed of the rotor of the filled brake device produces fluid pressure signals received by the inlet of said pressure chamber of the regulating chamber of the filling regulating valve means whose regulating piston operates said regulating valve for the rotor of the unfilled brake device.
References Cited (Backward Citations)
US3520376A
Cited
US3620319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |