Multi-purpose chair for the partially disabled

In combination with a chair which includes a seat and a main frame forming front and rear legs for carrying the seat;

• quickly detachable back means comprising
• structure forming upwardly opening first sockets on the main frame adjacent the respective rear corners of the seat,
• structure forming second sockets on the respective rear legs and opening laterally in opposite directions along a common axis at a level spaced below the seat and approximately in the plane of the rear legs,
• a back board mounted on a back frame,
• right and left first coupling formations mounted on the back frame in position to be normally releasably engageable in the respective first sockets by bodily downward movement of the back frame relative to the main frame,
• laterally flexible right and left arms which extend downward from the back frame and carry at their lower ends oppositely directed second coupling formations in position to be releasably insertable in the respective second sockets by virtue of opposite flexing of said arms,
• engagement of said second coupling formations positively preventing upward bodily movement of the back frame relative to the main frame and thereby positively locking said engagement of said first coupling formations.

In combination with a chair which includes a seat and a main frame forming front and rear legs for carrying the seat;

• quickly detachable back means comprising
• structure forming upwardly opening first sockets on the seat,
• structure forming laterally opening second sockets on the respective rear legs at a level below the seat,
• a back frame comprising right and left unitary side members each including generally vertical forward and rear sections which diverge downward at a small acute angle, and a generally horizontal cross member interconnecting the two sections of each side member and interconnecting the side members at approximately the level of the seat,
• a back board mounted on said forward sections of the back frame,
• right and left hook formations mounted on the cross member and extending substantially rigidly forward and downward in position to be normally releasably engageable in the respective first sockets,
• said rear sections of the side members projecting downward beyond the cross member and forming laterally flexible right and left arms which carry at their lower ends oppositely directed lateral pin formations in position to be releasably insertable in the respective second sockets by virtue of the lateral flexibility of said arms,
• engagement of said pin formations positively locking said engagement of said hook formations.

In combination with a chair which includes front and back legs and a seat carried by the legs;

• quickly detachable back means having a normal assembled position relative to the chair and comprising
• right and left rod-like side members carrying a back and each including generally vertical forward and rear sections which diverge downward at a small acute angle,
• cross means for substantially rigidly interconnecting the two sections of each side member and also interconnecting the two side members at approximately the level of the chair seat,
• said rear sections projecting below the cross means as laterally flexible right and left arms,
• first coupling means mounted substantially rigidly on the back means and on the chair at approximately the level of the chair seat and interengageable by virtue of bodily movement of the back means downward relative to the chair to said normal assembled position,
• and second coupling means mounted substantially rigidly on the respective rear legs of the chair and on said right and left arms and interengageable by virtue of lateral flexure of the respective arms,
• engagement of the second coupling means positively preventing upward bodily movement of the back means relative to the chair and thereby locking the engagement of the first coupling means.

In a multi-purpose chair for an invalid, a main frame comprising

• right and left rod-like side members each integrally including a horizontal side section, a straight front leg section, and a straight rear leg section,
• a rod-like third member integrally including a horizontal laterally extending front section rigidly interconnecting said side members, right and left rail sections extending in parallel laterally outwardly spaced relation to the side sections of the respective said side members, and straight right and left rear leg sections,
• and a horizontal rear member rigidly interconnecting said side members adjacent the rearward ends of the side sections thereof and interconnecting each side member and said third member,
• said two rear leg sections on each side of the frame converging at a small acute angle and being rigidly connected adjacent their lower ends, and
• a toilet seat rigidly supported on said main frame with the rail sections of said third member laterally spaced from the respective side edges of the seat and forming secure hand holds.