Patent US2877427A successfully refreshed from Google Patents.
Patent US3579979A successfully refreshed from Google Patents.
US3579979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulated hydraulic drive control apparatus
Assignee: Robert Bosch GmbH
•
Filing: 1969-06-04
•
Granted: 1971-05-25
•
Expires: 1989-06-04
Abstract
Abstract A hydraulic drive includes a prime mover and a hydraulic pumpmotor transmission which are respectively adjusted to correlated desirable operational conditions by three three-dimensional cam surfaces of a control cam. A speed regulator means compares a desired output speed with the actual output speed of the prime mover and preferably also of the hydraulic motor, and adjusts the drive accordingly.
Inventors
- 👤 Paul Bosch
- 👤 Walter Kobald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:21
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; B; B60; B60W; B60W10/00; B60W10/04; B60W10/06; B60W10/10; B60W10/101; B60W10/103; B60W30/00; B60W30/18; B60W30/188; F16H61/42; F16H61/437; F16H61/465; F02; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
202 words
Regulated hydraulic drive control apparatus, comprising, in combination, drive means including a prime mover having first regulating means, and a hydrostatic transmission having second regulating means and including a pump driven by said prime mover and a hydraulic motor hydraulically connected with said pump; and a control device including control means representing desired values and connected with said second regulating means for adjusting the same to obtain adjustment of said hydrostatic transmission, speed measuring means driven by said prime mover, a speed regulator having first input means connected with said speed measuring means for receiving information representing the actual speed of said prime mover, second input means connected with said control means for receiving information representing a desired speed of said prime mover correlated with said adjustment of said hydrostatic transmission, and output means connected with said first regulating means for adjusting the same until said prime mover operates at said desired speed, and operating means for operating said control means in accordance with operational conditions whereby said first and second regulating means are operated to effect correlated adjustments of said prime mover and of said hydrostatic transmission for obtaining optimal efficiency and performance of said drive means at different operational conditions.
Claim 2
Dependent Claim
202 words
Regulated hydraulic drive control apparatus, comprising, in combination, drive means including a prime mover having first regulating means, and a hydrostatic transmission having second regulating means and including a pump driven by said prime mover and a hydraulic motor hydraulically connected with said pump; and a control device including control means representing desired values and connected with said second regulating means for adjusting the same to obtain adjustment of said hydrostatic transmission, speed measuring means driven by said prime mover, a speed regulator having first input means connected with said speed measuring means for receiving information representing the actual speed of said prime mover, second input means connected with said control means for receiving information representing a desired speed of said prime mover correlated with said adjustment of said hydrostatic transmission, and output means connected with said first regulating means for adjusting the same until said prime mover operates at said desired speed, and operating means for operating said control means in accordance with operational conditions whereby said first and second regulating means are operated to effect correlated adjustments of said prime mover and of said hydrostatic transmission for obtaining optimal efficiency and performance of said drive means at different operational conditions.
Claim 3
Dependent Claim
60 words
An apparatus as claimed in claim 1 wherein said second regulating means includes a pump regulating means and a motor regulating means for said pump and said motor, respectively; wherein said control means are connected with said motor regulating means and said pump regulating means for adjusting the same simultaneously to effect correlated adjustments of said pump and said motor.
Claim 4
Dependent Claim
105 words
An apparatus as claimed in claim 2 wherein said control means include cam means having three three-dimensional cam surfaces, and first, second, and third cam follower means cooperating with said cam surfaces, respectively, and respectively connected with said first regulating means, said pump regulating means, and said motor regulating means, and pressure responsive means hydraulically connected with said transmission and operatively connected with said cam means for displaying the same in one direction in accordance with the fluid pressure in said transmission; and wherein said operating means are connected with said cam means for moving the same in a direction transverse to said one direction.
Claim 5
Dependent Claim
67 words
An apparatus as claimed in claim 3 wherein said cam means has three cam portions connected for rotation about an axis, and respectively having said three-dimensional cam surfaces; wherein said operating means turn said cam means about said axis, and said pressure responsive means displace said cam means in one axial direction, said control means including spring means biasing said cam means in the opposite axial direction.
Claim 6
Dependent Claim
29 words
An apparatus as claimed in claim 4 wherein said operating means include manual means directly connected with said cam means for turning the same in accordance with operational conditions.
Claim 7
Dependent Claim
29 words
An apparatus as claimed in claim 1 wherein said operating means include manual means directly connected with said control means for operating the same in accordance with operational conditions.
Claim 8
Dependent Claim
111 words
An apparatus as claimed in claim 1 wherein said operating means include second speed measuring means driven by said hydraulic motor to represent the actual output speed of the same; a second speed regulator having first input means connected with said speed measuring means for receiving information representing the actual output speed of said hydraulic motor, manual second input means for representing the desired output speed of said hydraulic motor, and output means connected with said control means for operating the same until the actual output speed of said hydraulic motor is equal to the desired speed selected in accordance with operational conditions by operation of said manual second input means.
Claim 9
Dependent Claim
105 words
An apparatus as claimed in claim 7 wherein said control means include cam means having three three-dimensional cam surfaces, and first, second, and third cam follower means cooperating with said cam surfaces, respectively, and respectively connected with said first regulating means, said pump regulating means and said motor regulating means, and pressure responsive means hydraulically connected with said transmission and operatively connected with said cam means for displacing the same in one direction in accordance with the fluid pressure in said transmission; and wherein said operating means are connected with said cam means for moving the same in a direction transverse to said one direction.
Claim 10
Dependent Claim
100 words
An apparatus as claimed in claim 1 wherein said operating means comprise pressure responsive means hydraulically connected with said transmission and operatively connected with said control means for adjusting the same in accordance with the fluid pressure in said transmission, a torque regulator having first input means connected with said second regulating means, second input means connected with said pressure responsive means, third manual input means for representing information regarding a desired output torque of said hydraulic motor, and output means connected with said control means for operating the same whereby to maintain the output torque of said motor constant.
Claim 11
Dependent Claim
54 words
An apparatus as claimed in claim 9 wherein said second regulating means include a pump regulating means and a motor regulating means respectively controlled by said control means, said motor regulating means adjusting the suction volume of said hydraulic motor and being operatively connected with said second input means of said second speed regulator.
Claim 12
Dependent Claim
129 words
An apparatus as claimed in claim 10 wherein said control means include cam means having three three-dimensional cam surfaces, and first, second, and third cam follower means cooperating with said cam surfaces, respectively, and respectively connected with said first regulating means, said pump regulating means, and said motor regulating means; wherein said pressure responsive means is operatively connected with said cam means for displacing the same in one direction in accordance with the fluid pressure in said transmission; wherein said third cam follower means which is connected with motor regulating means is also connected with said first input means of said second regulator means; and wherein said pressure responsive means is operatively connected with said cam means for displacing the same in a direction transverse to said one direction.
Claim 13
Dependent Claim
32 words
An apparatus as claimed in Claim 1 wherein said speed responsive means is a tachogenerator generating speed-representing electric signals; and wherein said speed regulator is an electronic device receiving said electric signals.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |