LEONARD L KRASNOW
Engineering in Westboro, MA
License number
Massachusetts 9077
Expiration Date
Jun 30, 1984
Type
Mechanical Engineer
Address
Address
Westboro, MA 01581
Professional information
Interchangeable Tool Operating Apparatus With Plural Motion
US Patent:
4173828, Nov 13, 1979
Filed:
Dec 19, 1977
Appl. No.:
5/861643
Inventors:
Leopold P. Lustig - Newton Centre MA
Leonard L. Krasnow - Westboro MA
Leonard L. Krasnow - Westboro MA
International Classification:
A61C 306, A61C 110, E02D 702, B26B 100
US Classification:
433 87
Abstract:
Novel tool operating apparatus is exemplified in a dental treatment device capable of driving alternatively at least a first tool and a second tool, each tool being intended to execute a different form of motion, with a single tool driving means to which each of several different tools can be removably coupled. The driving means includes a rotatable drive shaft fitted with tool engagement means in the form of a disc affixed to the shaft and lying in a plane that makes an acute angle with the rotational axis of the shaft. One tool can be fitted over the shaft to engage the disc so as to rotate the tool with the shaft. A second tool can be fitted over the shaft so that the shaft can rotate within the tool, but the tool will not rotate with the shaft. The second tool has means for cooperating with the shaft so as to execute an oscillatory motion relative to the shaft axis. Tools capable of two optional forms of oscillatory motion are disclosed--in one the motion is parallel to the axis of the shaft; in another the motion is nutational.
Extended Area Filters
US Patent:
4019987, Apr 26, 1977
Filed:
Jan 14, 1976
Appl. No.:
5/649052
Inventors:
Leonard L. Krasnow - Westboro MA
International Classification:
B01D 2900
US Classification:
210232
Abstract:
An extended-area filter for filtering plastic stock at high pressures has a breaker plate with an undulating surface confronting the oncoming stock which substantially doubles the available filter area. Screen packs having fixed therein the same surface configuration are supported uniformly on the undulating surface against collapse under the operating pressure.
Cuvette
US Patent:
4126418, Nov 21, 1978
Filed:
Jul 28, 1977
Appl. No.:
5/819970
Inventors:
Leonard L. Krasnow - Westboro MA
Assignee:
Elkay Products, Inc. - Shrewsbury MA
International Classification:
B65B 4342, B67C 300, G01N 100
US Classification:
422 64
Abstract:
Curvette of generally circular form having apertures adjacent the outer periphery and having a plurality of compartment elements formed of an optically-clear plastic snugly locked in the apertures.
Slide Filters
US Patent:
4059525, Nov 22, 1977
Filed:
Jun 28, 1976
Appl. No.:
5/700100
Inventors:
Leonard L. Krasnow - Westboro MA
International Classification:
B01D 2512
US Classification:
210236
Abstract:
A slide filter for filtering plastic stock and other materials having a slide plate movable within a housing, across the path of material flow. The housing contains sealing means to prevent leakage of the material to the outside of the housing. The slide plate includes one or more recesses bounded by wall means within which a mechanical screen or sand pack filter is positioned.