Abstract A dental chair conversion apparatus capable of use as a loungetype chair and having an adjustable head rest mounted on an elongated plate slidable in the keyway of a conventional support member carried on the frame portion of the dental chair which supports the chair back. A latch is mounted through the ears provided on the support member and in the preferred embodiment the elongated plates has a rack formed thereon and the latch has a projection formed for releasably engaging the rack in ratchet fashion and in an alternative embodiment the elongated plate has a series of holes formed along its length thereon and the latch has a tooth formed for selectively engaging the holes to thereby permit manual adjustment of the height of the head rest.
A thin profile split back conversion for a dental chair having a keyway in its frame for slidably suppporting an articulated headrest and a pin mount for pivotally supporting a backrest, comprising an elongated back support member formed for slidable mounting in the chair frame keyway and having a headrest keyway formed therein and pin mounting means at the upper end thereof, a thin profile backrest pivotally mounted on said pin mounting means on said back support member, a thin profile headrest having an elongated tongue slidable in said keyway in said support member, and securing means on said support member and said tongue formed for adjustably retaining said headrest in desired position relative to said backrest.
Claim 2
Dependent Claim
117 words
A thin profile split back conversion for a dental chair having a keyway in its frame for slidably suppporting an articulated headrest and a pin mount for pivotally supporting a backrest, comprising an elongated back support member formed for slidable mounting in the chair frame keyway and having a headrest keyway formed therein and pin mounting means at the upper end thereof, a thin profile backrest pivotally mounted on said pin mounting means on said back support member, a thin profile headrest having an elongated tongue slidable in said keyway in said support member, and securing means on said support member and said tongue formed for adjustably retaining said headrest in desired position relative to said backrest.
Claim 3
Dependent Claim
40 words
Apparatus as described in claim 1 and wherein said securing means comprises a latch member pivotally mounted on said pin mounting means on said back support member, and a series of detents on said tongue cooperative with said latch member.
Claim 4
Dependent Claim
32 words
Apparatus as described in claim 2 and wherein said series of detents comprises a toothed rack mounted on said tongue in confronting relation to said pin mounting means on said support member.
Claim 5
Dependent Claim
28 words
Apparatus as described in claim 2 and wherein said series of detents comprises a row of openings formed along said tongue for selective engagement by said latch member.