US3724752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device for controlling heating and air-conditioning installations in motor vehicles
Assignee: Daimler Benz AG
•
Filing: 1970-09-04
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Granted: 1973-04-03
•
Expires: 1990-09-04
Abstract
Abstract A control device for controlling heating and air-conditioning installations in motor vehicles, particularly in passenger motor vehicles, which controls by means of vacuum, an adjusting motor actuating the fresh or warm air flaps; the control device includes a flap control switch and a temperature switch whereby the flap control switch, which selectively controls the adjusting motor, is adjusted by a rotary knob into a preselected condition of either ''''air-conditioning off'''' or ''''air-conditioning on''''; the two switches are preferably arranged in a common housing and the temperature switch is adjustable within an angular range of less than 330* without changing a shifting rod controlling the actuation of the adjusting motor from its position ''''airconditioning.
Inventors
- 👤 R Andres
- 👤 A Stolz
- 👤 H Moller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:45
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00642; B60H1/00814; B60H1/00821; B60H1/00835; B60H1/00857
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
111 words
A control device for controlling the heating and airconditioning installations in motor vehicles by setting a desired temperature and by controlling an adjusting motor for actuating fresh-air or warm-air flap means, the control device comprising a flap control switch means for providing initial control of the adjusting motor for placing the fresh-air or warm-air flap means in a predetermined position, a temperature switch means for setting a desired temperature, and a rotary knob means for controlling the flap switch means into a preselected condition of ''''air-conditioning off'''' or ''''air-conditioning on'''', the rotary knob means also serving for controlling the temperature switch means to a desired temperature via a lost-motion connection means.
Claim 2
Dependent Claim
111 words
A control device for controlling the heating and airconditioning installations in motor vehicles by setting a desired temperature and by controlling an adjusting motor for actuating fresh-air or warm-air flap means, the control device comprising a flap control switch means for providing initial control of the adjusting motor for placing the fresh-air or warm-air flap means in a predetermined position, a temperature switch means for setting a desired temperature, and a rotary knob means for controlling the flap switch means into a preselected condition of ''''air-conditioning off'''' or ''''air-conditioning on'''', the rotary knob means also serving for controlling the temperature switch means to a desired temperature via a lost-motion connection means.
Claim 3
Dependent Claim
54 words
A control device according to claim 1, characterized in that the flap control switch means includes a shifting rod movable between positions of ''''air-conditioning on'''' and ''''air-conditioning off,'''' and that the temperature switch means is adjustable within an angular range of less than 330* without changing the shifting rod in its position ''''air-conditioning on.''''
Claim 4
Dependent Claim
136 words
A control device for controlling the heating and air-conditioning installations in motor vehicles by controlling an adjusting motor actuating fresh-air or warm-air flap means, characterized in that the control device includes a flap control switch means and a temperature Switch means for controlling the adjusting motor, and in that the flap control switch means is controlled by a rotary knob means into a preselected condition of ''''air-conditioning off'''' or ''''air-conditioning on'''', the flap control switch means and the temperature switch means being arranged in a common housing means, the flap control switch means including a substantially pot-shaped cylindrical housing part that is open laterally, and an elongated housing part which is in communication with the cylindrical housing part by way of a channel that terminates in the atmosphere at its end opposite its cylindrical housing part.
Claim 5
Dependent Claim
136 words
A control device for controlling the heating and air-conditioning installations in motor vehicles by controlling an adjusting motor actuating fresh-air or warm-air flap means, characterized in that the control device includes a flap control switch means and a temperature Switch means for controlling the adjusting motor, and in that the flap control switch means is controlled by a rotary knob means into a preselected condition of ''''air-conditioning off'''' or ''''air-conditioning on'''', the flap control switch means and the temperature switch means being arranged in a common housing means, the flap control switch means including a substantially pot-shaped cylindrical housing part that is open laterally, and an elongated housing part which is in communication with the cylindrical housing part by way of a channel that terminates in the atmosphere at its end opposite its cylindrical housing part.
Claim 6
Dependent Claim
66 words
A control device according to claim 3, in which the adjusting motor is operated by vacuum, characterized in that three vacuum lines disposed one adjacent the other, terminate laterally in the housing channel, of which the center vacuum line is adapted to be connected with a suction pipe of an engine and the two other vacuum lines are adapted to be connected to the adjusting motor.
Claim 7
Dependent Claim
27 words
A control device according to claim 4, characterized in that a shifting rod is arranged in the housing channel which projects partially into the cylindrical housing part.
Claim 8
Dependent Claim
40 words
A control device according to claim 5, characterized in that the shifting rod has a smaller diameter than the housing channel and includes two sections which are provided with sealing means sealingly sliding along the walls of the housing channel.
Claim 9
Dependent Claim
60 words
A control device according to claim 6, characterized in that the sections are arranged at such a distance from one another that the vacuum line in communication with the suction pipe is operatively connected at any time with only one of the other two vacuum lines of the adjusting motor by way of the space enclosed by the sealing means.
Claim 10
Dependent Claim
69 words
A control device according to claim 7, characterized in that the shifting rod includes a guide sleeve means at its end projecting into the cylindrical housing part, said guide sleeve means being rotatably connected at its one end with the shifting rod, and the other end of said guide sleeve means receiving a guide bolt that engages in a guide slot disposed in a part of the housing means.
Claim 11
Dependent Claim
25 words
A control device according to claim 8, characterized in that the part of the housing means provided with the guide slot is a housing cover.
Claim 12
Dependent Claim
41 words
A control device according to claim 8, characterized in that an offset bush means is arranged in the cylindrical housing part, into which engage a connecting means of the temperature switch means and a connecting means of the rotary knob means.
Claim 13
Dependent Claim
16 words
A control device according to claim 10, characterized in that the connecting means are pin-shaped elements.
Claim 14
Dependent Claim
49 words
A control device according to claim 10, characterized in that the connecting means of the rotary knob means is provided with a groove-shaped recess extending over a predetermined angle of the circumference thereof into which the bush means is adapted to rotatably engage by means of a nose portion.
Claim 15
Dependent Claim
37 words
A control device according to claim 12, characterized in that the connecting means of the temperature switch means is flattened off on one side and is thus connected with the bush means to rotate in unison therewith.
Claim 16
Dependent Claim
41 words
A control device according to claim 13, characterized in that the bush means includes at its one end a predominantly circularly shaped disk that is provided along its contour with an approximately saw-toothed shaped cam that partially surrounds the guide bolt.
Claim 17
Dependent Claim
43 words
A control device according to claim 14, characterized in that the connecting means of the rotary knob means is guided at its end projecting out of the cylindrical housing part in a collar means and is retained by means of a snap ring.
Claim 18
Dependent Claim
24 words
A control device according to claim 15, characterized in that the collar means is threaded into a reinforcing ring of the cylindrical housing part.
Claim 19
Dependent Claim
20 words
A control device according to claim 16, characterized in that the rotary knob means locks in its two end positions.
Claim 20
Dependent Claim
34 words
A control device According to claim 17, characterized in that the temperature switch means is adjustable within an angular range of less than 330* without changing the shifting rod in its position ''''air-conditioning on.''''
Claim 21
Dependent Claim
27 words
A control device according to claim 3, characterized in that a shifting rod is arranged in the housing channel which projects partially into the cylindrical housing part.
Claim 22
Dependent Claim
40 words
A control device according to claim 19, characterized in that the shifting rod has a smaller diameter than the housing channel and includes two sections which are provided with sealing means sealingly sliding along the walls of the housing channel.
Claim 23
Dependent Claim
69 words
A control device according to claim 19, characterized in that the shifting rod includes a guide sleeve means at its end projecting into the cylindrical housing part, said guide sleeve means being rotatably connected at its one end with the shifting rod, and the other end of said guide sleeve means receiving a guide bolt that engages in a guide slot disposed in a part of the housing means.
Claim 24
Dependent Claim
25 words
A control device according to claim 21, characterized in that the part of the housing means provided with the guide slot is a housing cover.
Claim 25
Dependent Claim
41 words
A control device according to claim 3, characterized in that an offset bush means is arranged in the cylindrical housing part, into which engage a connecting means of the temperature switch means and a connecting means of the rotary knob means.
Claim 26
Dependent Claim
16 words
A control device according to claim 23, characterized in that the connecting means are pin-shaped elements.
Claim 27
Dependent Claim
49 words
A control device according to claim 23, characterized in that the connecting means of the rotary knob means is provided with a groove-shaped recess extending over a predetermined angle of the circumference thereof into which the bush means is adapted to rotatably engage by means of a nose portion.
Claim 28
Dependent Claim
37 words
A control device according to claim 25, characterized in that the connecting means of the temperature switch means is flattened off on one side and is thus connected with the bush means to rotate in unison therewith.
Claim 29
Dependent Claim
69 words
A control device according to claim 23, characterized in that the shifting rod includes a guide sleeve means at its end projecting into the cylindrical housing part, said guide sleeve means being rotatably connected at its one end with the shifting rod, and the other end of said guide sleeve means receiving a guide bolt that engages in a guide slot disposed in a part of the housing means.
Claim 30
Dependent Claim
41 words
A control device according to claim 27, characterized in that the bush means includes at its one end a predominantly circularly shaped disk that is provided along its contour with an approximately saw-toothed shaped cam that partially surrounds the guide bolt.
Claim 31
Dependent Claim
43 words
A control device according to claim 23, characterized in that the connecting means of the rotary knob means is guided at its end projecting out of the cylindrical housing part in a collar means and is retained by means of a snap ring.
Claim 32
Dependent Claim
24 words
A control device according to claim 29, characterized in that the collar means is threaded into a reinforcing ring of the cylindrical housing part.
Claim 33
Dependent Claim
27 words
A control device according to claim 1 characterized in that the rotary knob means has two end positions of rotation and locks in its two end positions.
References Cited (Backward Citations)
US2745257A
Cited
US3003320A
Cited
US3191669A
Cited
US3410486A
Cited
US3411713A
Cited
US3386656A
Cited
US3490518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |