Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1976-12-14
1978-06-20
Whitehead, Harold D.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
15 17, 51429, 51432, 114222, 118305, 180115, B24C 306, B24C 900, B63B 5900, F04H 320
Patent
active
040953785
ABSTRACT:
A device capable of suction-adhering to a wall surface by the pressure of an ambient fluid, and of moving along the wall surface. The device includes a pressure receiver housing made of a rigid or semi-rigid material; a plurality of wheels or endless tracks secured to the housing so as to make contact with the wall surface; a partition connected to the housing and having a free end adapted to make contact with the wall surface, at least the free end being made of a relatively flexible material, the partition being adapted to define a substantially fluid-tight low pressure area together with the wall surface and the housing or together with the wall surface alone; and means for discharging a fluid from the low pressure area. The partition has a portion extending outwardly from the position at which it is connected to the housing, and by a relatively small force, at least its free end can be displaced toward and away from the wall surface with respect to the housing. The free end is brought into contact substantially fluid-tight with the wall surface by the fluid pressure which acts on the partition owing to the difference in fluid pressure between the inside and outside of the low pressure area. The fluid pressure acting on the housing is transmitted to the wall surface through the wheels or endless tracks, thereby to cause the device to adhere to the wall surface.
REFERENCES:
patent: 2455514 (1948-12-01), Mead
patent: 2729918 (1956-01-01), Van Den Burgh
patent: 2766557 (1956-10-01), Pollard
patent: 3609916 (1971-10-01), Hammelmann
patent: 3627562 (1971-12-01), Hammelmann
patent: 3777834 (1973-12-01), Hiraoka
patent: 3788010 (1974-01-01), Goff
patent: 3934372 (1976-01-01), Diehn
patent: 3958652 (1976-05-01), Urakami
patent: 3991842 (1976-11-01), Larsen
Godici Nicholas P.
Whitehead Harold D.
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