US 9,433,296 B2Granted

Device for quickly mounting a back rest on a mechanism for office chairs

AssigneeImarc S.P.A.

InventorClaudio Gorgi

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Abstract

A device for connecting a back rest to the seating portion support mechanism for chairs includes a first part pertaining to the mechanism, a second part pertaining to the back rest, a pair of pins, at least one of which is applied to the first part (second part), a pair of open slots, at least one of which pertains to the second part (first part), the slots forming housings for the pins, an elastic member acting on at least one of the pins or the housings, the distance between the axes of the pins or the housings being modifiable temporarily against the action of the elastic member, wherein the open slots present an inclined surface which, by acting against one of the pins, causes a temporary modification of the distance between axes of the pins, so facilitating engagement of the pin in the housing seat.

Claims7

Dependent claims

A device for connecting a back rest to a seating portion support mechanism for chairs, comprising:

a first part (2) configured to be coupled to the support mechanism;
a second part (46) configured to be coupled to the back rest (42);
a pair of pins (18, 20), at least one of which is coupled to the first part or the second part;
a pair of open slots (50, 52), at least one of which is defined in the second part or respectively the first part, said slots forming housing seats (54, 56) for said pins (18, 20);
and
an elastic member (28) acting on at least one of said pins, a distance between axes of said pins being altered temporarily by compressing said elastic member (28) during engagement of said second part (46) in said first part (2),
wherein said open slots (50, 52) have an inclined surface (60) which, by acting against one of said pins (18, 20), causes a temporary modification of the distance between the axes of said pins, thereby facilitating engagement of said pin (18, 20) in said housing seat (54, 56),
wherein at least one of said pins (18, 20) moves along a slotted aperture (32) of said first part (2),
wherein said slotted aperture (32) comprises striking surfaces (38, 40) which form limit stops for a rotation of one of said pins (18) about another one of said pins (20), and
wherein there are two slotted apertures (32) which are formed from a first branch (34) along which said pins (18, 20) slide, and from a second branch (36) enabling said second part (46) to swivel about said first part (2).

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/896,476Filed 1 Jul 2014
Priority: IT VE2013A00343 Jul 2013
Published: US 2016/0128483 A112 May 2016
Granted: 6 Sep 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

A47C 4/021
Dismountable chairs: connected by slotted joints
A47C 1/03238
Having adjustable and lockable inclination: by means of peg-and-notch or pawl-and-ratchet mechanism
A47C 1/03255
The parts being movably-coupled seat and back-rest: with a central column, e.g. rocking office chairs
A47C 7/42
For the back: of detachable or loose type

Family

US 2016/0128483 A1Pre-grant publication · published 12 May 2016
US 9,433,296 B2This patent

From the US filing history. Foreign family members aren’t listed.

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