Fire escape – ladder – or scaffold – Horizontal traversing - actuation – control – or response – Occupant actuation or control
Patent
1986-05-19
1987-04-28
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Horizontal traversing - actuation, control, or response
Occupant actuation or control
182 37, 182 63, 182150, E04G 316, B66F 1104, B62D 5702
Patent
active
046606785
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a service suspension basket arrangement which is adapted to move on rails or on similar mounting means which are secured on a support ramp on an upwardly facing foundation and/or on rails or on similar mounting means which are secured on the under side of a platform deck or on a similar, downwardly facing foundation.
The service basket is particularly intended for use for inspection work, easier maintenance work together with repair work on installations (drilling rigs and the like) at sea in connection with oil and gas fields. It is especially appropriate to use the service basket on the under side of a deck, the so-called "cellar deck". However, it is also appropriate to use the arrangement on land installations.
With the present invention the aim is to be able to carry out the afore-mentioned service operations without using scaffolding and like constructions which are relatively cost demanding in purchase and in use and which in addition are time-demanding in connection with assembly and disassembly. The objective is thus a service basket which can be transferred in a relatively rapid and easy manner from storage location to use location and which by "self help" can take itself forwards to and backwards from different positions of interest on the under side of the deck or similar foundation in a relatively rapid and reliable manner.
The arrangement according to the invention is characterised in that the service basket is supported, via a number of joint arm-formed, hydraulically pivotable support means with associated separate hydraulically operated catch claws, on the said rails or similar mounting means, a feeler means or a pair of feeler means in each catch claw controlling the operation of the remaining catch claws and/or the support means of the remaining catch claws, so that when the one catch claw assumes an open or released position there is provision for the associated feeler means to block the operation of the remaining catch claws and/or support means of the remaining catch claws.
By means of the joint arm-formed, hydraulically pivotable support means with associated separate hydraulically operated catch claw one can according to desire allow the service basket to move along or across the associated rails or similar mounting means or from mounting means to mounting means, for example along the under side of a deck or a roof--or from a support ramp on an upwardly facing foundation to the under side of the deck or the roof--in a controlled manner. That is to say that by means of the said feeler means or pair of feeler means one can provide for movement of the support means with associated catch claws one at a time in a controlled and reliable manner. This makes it possible for an operator in the service basket to move the support means with catch claw in different directions and over different distances from rail to rail or from mounting means to mounting means or along the rail or the mounting means, while the remaining support means with associated catch claws maintain the basket in a controlled manner at its associated fixed location and with the service basket in one and the same position. Movements of the service basket can take place at a relatively slow tempo.
By services which are to be carried out below a platform deck, for example below a so-called "cellar deck", there are most often relatively large heights between said cellar deck and a so-called "spider deck" lying below. Often the distance in height is 10-12 meters. The aim in such instances is to allow the service basket in the starting position to rest on rails or similar mounting means on a support ramp which bears against the upwardly facing side of the spider deck. Thereby one can allow the basket to start its movement upwardly against the downwardly facing side of the cellar deck from a level (for example 2 m) above the spider deck. By way of the support means with associated catch claws, which can be operated one at a time, it is possible during the whole of the transfer operation constantl
REFERENCES:
patent: 2761396 (1956-09-01), Harlan
patent: 2925240 (1960-02-01), Laviolette
patent: 2930441 (1960-03-01), Lacy et al.
patent: 3524520 (1970-08-01), Tidwell
patent: 3908792 (1975-09-01), Shortt
patent: 4201275 (1980-05-01), Sinclair
patent: 4271927 (1981-06-01), Brown
patent: 4276959 (1981-07-01), Barber
Machado Reinaldo P.
Spider A/S
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