Chairs and seats – Movable bottom – Bottom and back movable as a unit
Reexamination Certificate
1999-06-15
2001-11-20
Cranmer, Laurie K. (Department: 3636)
Chairs and seats
Movable bottom
Bottom and back movable as a unit
C297S344140, C296S065130
Reexamination Certificate
active
06318802
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an arrangement for enabling a vehicle seat to be moved forward and rearwardly, to be locked in a forward operating position and to be readily unlocked for rearward movement and a subframe which is fastenable to the vehicle floor below it and to the seat above it, which permits the seat to slide forward and rearward, which enables. the seat to be locked in a forward position and which enables the seat to be moved rearwardlye.
STATE OF THE ART
A generally known arrangement is for vehicle seats, particularly driving seats, to be movable in the longitudinal direction of the vehicle in order to make convenient positioning possible for the seat user and/or create more clear space in the interior of the vehicle. In such cases the seat is usually mounted on longitudinal rails situated in a plane which either slopes somewhat upwards in the forward direction of the vehicle or substantially horizontally. This consequently makes it possible to move the seat along the corresponding plane. Such an arrangement does limit, however, the possibility of easily climbing into and out of the vehicle and getting into and out of the vehicle seat, particularly in vehicles of the truck and bus type. Operating the seat securing mechanism for manual setting of the seat in the longitudinal direction also involves control action during the whole setting movement and often entails one or more extra setting movements before the desired securing position is reached.
BRIEF DESCRIPTION OF THE INVENTION
The object of the present invention is to provide a seat arrangement that manifestly reduces the abovementioned disadvantages of the state of the art. The invention aims at seat control which, particularly in truck cabs, makes it easy to reset the seat between a predetermined driving position and a likewise predetermined resting position not intended to be a driving position. The solution has also to make possible a simple form of control mechanism with simple and inexpensive components without having to disregard the safety requirement of reliable securing of the seat.
To this end, the invention is distinguished by a control device that cooperates with the seat locking device during relocation of the seat between the forward and rear positions, freeing the locking device from a locking position to free the seat to move to the rear position. The features therein indicated makes it possible for the seat to be provided with a longitudinal relocating movement between a forward (driving) position and a rear (resting) position by easy manual operation of a control which acts upon the seat locking device. Rail mechanisms of standard types which are simple, inexpensive but well-proven from the safety point of view can be used for the purpose. The co-operation according to the invention between control device and locking device also makes it possible to reset the seat quickly and safely between preselected forward and rear positions. This solution is particularly advantageous in the case of seats of the type which can be relocated along a plane which slopes downwards in the forward direction of the vehicle. Such seats are used with advantage in vehicles of the truck and bus type which are entered by climbing and in which it is possible to sit down in the seat from an almost standing position.
In an advantageous embodiment of the invention, the seat can be moved rearwards with the assistance of a first force to a rear (resting) position. This makes it possible for a person sitting in the seat to cause it to move to a rear position by simply lightening his weight on the seat and by operating manually the control which acts upon the securing mechanism.
In another embodiment, the seat can be moved forwards, i.e. from the rear position to a forward (driving) position, against the action of a second force. This means that in the case of seats of the aforesaid type which can be moved along a plane which slopes downwards in the forward direction of the vehicle, the movement can take place against the action of the second force so that when a person sits on the seat while it is at an upper resting position the seat will automatically, by a controlled movement, assume a driving position.
REFERENCES:
patent: 3448820 (1969-06-01), Aiello et al.
patent: 3826530 (1974-07-01), Hoffmeyer et al.
patent: 3841696 (1974-10-01), Wagner
patent: 4262958 (1981-04-01), Houseman et al.
patent: 4944555 (1990-07-01), Brusasco
patent: 655918 (1963-01-01), None
patent: 2647288 (1978-04-01), None
patent: 2806795 (1979-08-01), None
patent: 0301461 (1989-02-01), None
Jonsson Stefan
Lestander Sten-Erik
Sjostrom Staffan
Cranmer Laurie K.
Ostrolenk Faber Gerb & Soffen, LLP
Scania CV Aktiebolag
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