Expansible chamber devices – With toothed gear – spline or thread rigid with working member
Patent
1995-03-06
1996-08-27
Nguyen, Hoang
Expansible chamber devices
With toothed gear, spline or thread rigid with working member
92138, 16 71, 16DIG7, F01R 900, E05F 100
Patent
active
055490336
ABSTRACT:
A hydraulic operating device for gate movement comprises a gate pintleing unit (10) comprising a box (11) with rotating support body (37) for a shaft (12) having a first gear (20) integral therewith projecting into the box. The shaft (12) faces at the top a box (11) with one of its axial fixing ends (15) integral with the gate rotation axis. The device also comprises a hydraulic operating unit made up of a drive element (25) consisting of a central body (32) from which project opposed hydraulic cylinders (26,27) in which run respective pistons (28,29). Between the pistons is connected a rack (30) traversing the central body (32) to project laterally therefrom with its teeth. It is thus possible to prepare a gate for future automation by mounting only the box and subsequently inserting therein the operating unit.
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patent: 3605409 (1971-09-01), Heese et al.
patent: 4048694 (1977-09-01), Newman et al.
patent: 4073033 (1978-02-01), Lexnas
patent: 4502180 (1985-03-01), Harrison et al.
patent: 4543977 (1988-10-01), Arav
FAAC S.p.A.
Nguyen Hoang
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