Rally Roller Dry Shaver
FiledWednesday, 27th December 1950
PublishedTuesday, 12th May 1953
InventorJonas Åke Gregorius Malmberg
Other countriesDE830305CPC Classification:
Drive layout for hair clippers or dry shavers, e.g. providing for electromotive drive providing for muscle drive, e.g. by rolling over the skin
Performing Operations; Transporting
Hand Cutting Tools; Cutting; Severing
Hand-Held Cutting Tools Not Otherwise Provided For
Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
Drive layout for hair clippers or dry shavers, e.g. providing for electromotive drive
Parts not referenced in the text: None
Parts not referenced in the images: None
The present invention relates to an improvement in such shaving-apparatus having a finely slitted rotatably mounted drum and a fixed knife applied inside and in the longitudinal direction of the said drum, and the object of the invention is to obtain an effective operating and durable shaving apparatus of this type, the invention being chiefly characterized by an open-ended casing provided with a longitudinal slot and arranged inside the drum for the purpose of guiding the same and connected with a handle, the one of the longitudinal edges of the slot in the casing being provided with a longitudinal groove for inserting an exchangeable knife, and movable locking means which in the locking position cooperate with the ends of the knife in order to keep the knife fixed in the longitudinal direction and also crosswise.
This arrangement thus renders it possible to use exchangeable knives which, after being inserted in the groove in the one edge of the slotted casing is firmly locked by the locking means.
According to the invention, the ends of the casing can be connected with the branches of a
Other features of the invention will in the following be more closely described in connection with the accompanying drawings.
The shaving-apparatus contains a
Around the casing
According to the embodiment illustrated in the drawings the locking means
As seen on the drawing, the two locking means
Having now particularly described the nature of my invention and the manner of its operation, what I claim is:
1. In a dry shaver of the type including a rotary slitted drum and an interior fixed blade in shearing relation thereto, a support for said blade comprising a longitudinally slotted open-ended hollow cylindrical casing disposed within said drum, a longitudinal edge of said casing being formed to provide a relatively deep and narrow groove adapted to receive and position said blade with its cutting edge contacting the inner surface of said drum, a frame supporting said casing in fixed relation thereto, and means pivotally mounted on said frame on an axis parallel to the longitudinal axis of said casing and swingable to a position closing both ends of said casing, thereby retaining said blade against longitudinal displacement.
2. A dry shaver according to claim 1, including a pair of cover plates pivoted on said frame on axes parallel to and on opposite sides of a plane extending centrally through said frame and containing the longitudinal axis of said casing, said plates serving in one terminal position to cover said drum and in the other terminal position to form a handle for the shaver.
3. A dry shaver according to claim 2, including resilient means acting between said frame and said plates and serving to urge them toward their first-named terminal position.
Jonas Åke Gregorius Malmberg.
References Cited in the file of this patent
United States Patents
Number Name Date
2,331,646 Arey Oct. 12, 1943