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US 5,395,160 AGranted
Armrest assembly for a dental chair
AssigneeA-dec, Inc.
InventorsPaul B. Krebs, Thomas E. Brink
Life of this patent
Estimating the term…
Abstract
A dental chair has an armrest pivoted to a base at an armrest pivot, and a seat back pivoted to the base at a back pivot located forward of the armrest pivot. The seat back includes a support pin for supporting the armrest at a position forward of the seat back pivot. Moving the seat back from an upright position to a reclined position through a large range of angular motion causes the support pin to elevate the armrest by a substantially smaller angular amount.
Claims19
An armrest assembly for a chair comprising:
- a base;
- an armrest pivotally attached to the base at an armrest pivot to move through a range of motion between a raised position and a lowered position;
- a seat back pivotally attached to the base at a back pivot, the seat back being movable about the back pivot through a first range of motion between a reclined position and an upright position;
- and
- a support member attached to the seat back between the seat back and the armrest away from the back pivot and having an end protruding from the seat back for contacting the armrest at a location such that movement of the seat back from the upright position to the reclined position causes the support member to move the armrest about the armrest pivot between the lowered position and the raised position, the support member being mounted to support the armrest such that the armrest may be pivoted freely about the armrest pivot relative to the support member.
2 more elements
An armrest assembly for a dental chair comprising:
- a base;
- an armrest pivotally attached to the base at an armrest pivot to move through a range of motion between a raised position and a lowered position;
- a seat back pivotally attached to the base at a back pivot, the seat back being movable about the back pivot through a first range of motion between a reclined position and an upright position;
- a support member attached to the seat back and away from the back pivot and having a surface against which the armrest is supported for sliding motion relative to the surface;
- and
- an armrest-actuating means for moving the armrest toward the raised position in response to movement of the seat back toward the reclined position, and for permitting movement of the armrest toward the lowered position in response to movement of the seat back toward the upright position wherein the armrest-actuating means moves the armrest at a first angular rate in response to movement of the seat back at a second angular rate, the second angular rate being greater than the first angular rate.
3 more elements
Dependencies are inferred from the claim text.