US3875423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Kneading and mixing machine
Assignee: Individual
•
Filing: 1973-03-13
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Granted: 1975-04-01
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Expires: 1993-03-13
Abstract
Abstract An electrically driven kneading and mixing machine with different speed ranges, having a guard grille which, when raised, switches off the machine. The machine is equipped with two push button switches and two electrically driven time switches. The switches are interconnected in such a way that one of the timing switches is used for programming the machine operation, whereas the other time switch, on expiration of the timing of the first time switch, actuates an increased speed range.
Inventors
- 👤 Kate Kemper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:03
CPC Classifications
A; A21; A21C; A21C1/00; A21C1/14; A21C1/145; Y; Y10; Y10S; Y10S366/00; Y10S366/601
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
253 words
An electrically driven kneading and mixing machine operating in different speed ranges, having a liftable guard grille; means connected to the grille for switching off the machine in any speed range when the grille is lifted; a first push-button switch; means connected to said first push-button switch for driving the machine at a relatively low speed upon actuation of the first push-button switch; a first timer connected to the first push-button switch for determining the operating period of the machine at the relatively low speed; comprising in combination: a. a second push-button switch connected in series with said first push-button switch and said first timer; b. means connected to said second push-button switch for driving the machine at a relatively high speed upon actuation of said second push-button switch; c. a second timer connected to said second push-button switch for determining the operating period of the machine at the relatively high speed, said second timer being connected in series with said first push-button switch and said first timer, said second timer being programmable with the entire work period; d. means connected to said first timer for switching, upon expiration of the work period of said first timer, to the relatively high speed by the actuation of said second pushbutton switch; e. a first toggle switch connected parallel with said first timer and in series with said first and second push-button switches; and f. a second toggle switch connected parallel with said second timer and in series with said first and second push-button switches.
Claim 2
Dependent Claim
253 words
An electrically driven kneading and mixing machine operating in different speed ranges, having a liftable guard grille; means connected to the grille for switching off the machine in any speed range when the grille is lifted; a first push-button switch; means connected to said first push-button switch for driving the machine at a relatively low speed upon actuation of the first push-button switch; a first timer connected to the first push-button switch for determining the operating period of the machine at the relatively low speed; comprising in combination: a. a second push-button switch connected in series with said first push-button switch and said first timer; b. means connected to said second push-button switch for driving the machine at a relatively high speed upon actuation of said second push-button switch; c. a second timer connected to said second push-button switch for determining the operating period of the machine at the relatively high speed, said second timer being connected in series with said first push-button switch and said first timer, said second timer being programmable with the entire work period; d. means connected to said first timer for switching, upon expiration of the work period of said first timer, to the relatively high speed by the actuation of said second pushbutton switch; e. a first toggle switch connected parallel with said first timer and in series with said first and second push-button switches; and f. a second toggle switch connected parallel with said second timer and in series with said first and second push-button switches.
Claim 3
Dependent Claim
59 words
Machine according to claim 1, wherein the timers each have a program setting indicator and in a program expiration indicator and wherein on actuating the guard grille, the program expiration indicator is arrested at the point in time of the operation interruption and, with the continuance of the operating program, controls the remaining part of the pre-programmed operating time.
Claim 4
Dependent Claim
61 words
Machine according to claim 1, wherein the timers each have a program setting indicator and in a program expiration indicator and wherein on actuating the guard grille, the program expiration indicators fall back into the setting position, so that the originally programmed program restarts when the machine is switched on again by actuation of the first or second push button switch.
Claim 5
Dependent Claim
28 words
Machine according to claim 1, wherein the program set by the timers can be varied manually during operation, by actuation of the timers or the push button switches.
Claim 6
Dependent Claim
27 words
Machine according to claim 1, wherein indicating lamps are coupled with the push button switches, so that the operational state prevalent in each case is indicated visually.
Claim 7
Dependent Claim
20 words
Machine according to claim 1, wherein a reversing switch is provided to control the bowl rotation sense and bowl speed.
Claim 8
Dependent Claim
25 words
Machine according to claim 1, wherein a toggle or inching switch is provided for rotating the bowl for a short time at its lowest speed.
Claim 9
Dependent Claim
33 words
Machine according to claim 1, wherein the actuating elements are arranged on the front side of the turret of the machine part which can be raised and is constructed as a tool carrier.
References Cited (Backward Citations)
US2857533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |