MANUALLY OPERATED PRESS HAVING AN OVERLOAD PROTECTION
First Claim
1. A manually operated press comprising an actuation member coupled to a shaft, an actuation of said actuation member being transformed into a stroke movement of a press ram coupled to said shaft and, accordingly, into a change of a relative displacement position of said press ram, and a clutch for interrupting a flow of force between said actuation member and said press ram, wherein said shaft is at least two-piece, namely configured with an input shaft and an output shaft, said clutch being adapted to separate said input shaft from said output shaft depending on at least one press parameter of a group of press parameters comprising pressing force and relative displacement position of said press ram.
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Accused Products
Abstract
A manually operated press comprises an actuation lever coupled to a shaft assembly. An actuation of the actuation lever is transformed into a stroke movement of a press ram coupled to the shaft assembly and, accordingly, into a change of a relative displacement position of the press ram. A clutch assembly is provided for interrupting a flow of force between the actuation lever and the press ram. The shaft is at least two-piece, namely configured with an input shaft and an output shaft. The clutch is adapted to separate the input shaft from the output shaft depending on the pressing force and/or the relative displacement position of the press ram. The shaft assembly comprises an input shaft and an output shaft. The input shaft extends as an inner shaft through the output shaft being configured as a hollow shaft. The clutch assembly has a first clutch designed as a stroke stop for immobilizing the input shaft with a housing of said press depending on pressing force and/or relative displacement position of the press ram, and a second clutch designed as an overload clutch for interrupting a flow of force between the input shaft and the output shaft.
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Citations
33 Claims
- 1. A manually operated press comprising an actuation member coupled to a shaft, an actuation of said actuation member being transformed into a stroke movement of a press ram coupled to said shaft and, accordingly, into a change of a relative displacement position of said press ram, and a clutch for interrupting a flow of force between said actuation member and said press ram, wherein said shaft is at least two-piece, namely configured with an input shaft and an output shaft, said clutch being adapted to separate said input shaft from said output shaft depending on at least one press parameter of a group of press parameters comprising pressing force and relative displacement position of said press ram.
- 22. A manually operated press comprising a shaft assembly being configured at least two-piece, namely with an input shaft and an output shaft, said input shaft extending as an inner shaft through said output shaft being configured as a hollow shaft, an actuation member coupled to said shaft assembly, an actuation of said actuation member being adapted to be transformed into a stroke movement of a press ram coupled to said shaft assembly, and a clutch assembly having a first clutch designed as a stroke stop for immobilizing said input shaft with a housing of said press depending on at least one press parameter of a group of press parameters comprising pressing force and relative displacement position of said press ram, and a second clutch designed as an overload clutch for interrupting a flow of force between said input shaft and said output shaft.
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32. A method for protecting a manually operated press against mechanical overload, said press having an actuation member coupled to a shaft, an actuation of said actuation member being transformed into a stroke movement of a press ram coupled to said shaft and, accordingly, into a change of a relative displacement position of said press ram, and a clutch for interrupting a flow of force between said actuation member and said press ram, wherein said shaft is at least two-piece, namely configured with an input shaft and an output shaft, said clutch being adapted to separate said input shaft from said output shaft depending on at least one press parameter of a group of press parameters comprising pressing force and relative displacement position of said press ram against overload, the method comprising the steps of:
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closing said clutch; sensing at least one of said press parameters; determining whether said press parameter has reached a predetermined threshold value; and if said predetermined threshold value has been reached, actuating said clutch for separating said at least two shafts from each other. - View Dependent Claims (33)
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Specification