EP 0005604 A1 19791128 - A surface cleaning machine.

Title (en)

A surface cleaning machine.

Title (de)

Maschine zum Reinigen von Oberflächen.

Title (fr)

Machine pour le nettoyage de surfaces.

Publication

EP 0005604 A1 19791128 (EN)

Application

EP 79300768 A 19790504

Priority

AU 8424782 A 19820528
GB 2072078 A 19780519

Abstract (en)

A surface cleaning machine, of the kind in which abrasive grit (6) is projected at high velocity against a surface (1) to be cleaned. The machine has an upper hopper (12) to receive grit carried by rebound and air flow from the zone (4) being cleaned. Adjustable openings (26) provide for controllable air exhaust upstream of the upper hopper (12) which has a controllable outlet (27, 27A) through which grit falls in the form of a curtain (6A) into a main, lower hopper (11). Air is drawn into the main hopper (11) through a controllable inlet (28, 28A) and flows through the curtain (6A) to remove dirt from the falling grit. The angle of the blast wheel (3) can be varied, to vary the angle of impact of the projected grit (6) on the surface (1) in the cleaning zone (4).

IPC 1-7

B24C 3/06

IPC 8 full level

B08B 5/02 (2006.01); B24C 3/06 (2006.01)

CPC (source: EP)

B24C 3/067 (2013.01)

Citation (search report)

GB 1536807 A 19781220 - WORLDWIDE BLAST CLEANING LTD
US 3715838 A 19730213 - YOUNG G, et al
US 4020596 A 19770503 - BERGH JOHN C
GB 1496268 A 19771230 - WORLDWIDE BLAST CLEANING LTD
DE 2708528 A1 19770915 - WHEELABRATOR FRYE INC
US 3034262 A 19620515 - PAWLSON EUGENE T
US 3934372 A 19760127 - DIEHN PHILIP H, et al
US 3900969 A 19750826 - DIEHN PHILIP H
DE 2756786 A1 19780629 - NELSON ROBERT TIVIS
US 3008274 A 19611114 - WILLY WELTER

Designated contracting state (EPC)

BE DE FR IT NL SE

DOCDB simple family (publication)

EP 0032161 A1 19810722; AR 218723 A1 19800630; BR 7903080 A 19791204; CA 1115528 A 19820105; DK 204979 A 19791120; EP 0005604 A1 19791128; GB 1603308 A 19811125; HK 45982 A 19821112; HK 46082 A 19821112; JP S555282 A 19800116; JP S58155172 A 19830914; NO 791612 L 19791120; NO 820454 L 19791120; ZA 792058 B 19800528

DOCDB simple family (application)

EP 80106366 A 19790504; AR 27655879 A 19790517; BR 7903080 A 19790518; CA 327925 A 19790518; DK 204979 A 19790518; EP 79300768 A 19790504; GB 2072078 A 19780519; HK 45982 A 19821104; HK 46082 A 19821104; JP 6060779 A 19790518; JP 946183 A 19830125; NO 791612 A 19790515; NO 820454 A 19820216; ZA 792058 A 19790430