Patent AT48991B successfully refreshed from Google Patents.
Patent US4429918A successfully refreshed from Google Patents.
US4429918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operatory stool
Assignee: DEN-TAL-EZ DENTAL PRODUCTS CORP A CORP OF PA
•
Filing: 1982-11-12
•
Granted: 1984-02-07
•
Expires: 2002-11-12
Abstract
Abstract An operatory stool having an arcuate, body support arm positioned above the level of the stool seat is described. The body support arm is reversible for right- or left-handed use of the stool. The stool structure permits rapid interchange between the right- and the left-handed configurations by means of a rotatable mechanism between the body support arm and a connecting member between the body support arm and the seat, which permits rotation of the body support arm through a 180° upwardly extending arc from one side of the connecting member to the other. Means are provided for locking the body support arm at dependent positions on either side of the connecting member. Additionally, a reversible locking mechanism for resisting rotation of the body support arm about the connecting member in a predetermined direction in a horizontal plane is provided.
Inventors
- 👤 James D. Alsup, Jr.
- 👤 Kenneth L. Barrett
- 👤 Arden F. Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:22
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/48
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
103 words
A stool comprising: a seat; means depending from the seat from engaging a support surface; an arcuate, body support arm positioned above the level of said seat for supporting a portion of the body of a user, said support arm having a concave surface; support means supporting said body support arm above the level of said seat, and connecting means for rotatably attaching said end of said support arm to a top end of said connecting means, said body support arm being reversibly rotatably secured about its point of attachment to said connecting means on either side thereof in a substantially horizontal position.
Claim 2
Dependent Claim
103 words
A stool comprising: a seat; means depending from the seat from engaging a support surface; an arcuate, body support arm positioned above the level of said seat for supporting a portion of the body of a user, said support arm having a concave surface; support means supporting said body support arm above the level of said seat, and connecting means for rotatably attaching said end of said support arm to a top end of said connecting means, said body support arm being reversibly rotatably secured about its point of attachment to said connecting means on either side thereof in a substantially horizontal position.
Claim 3
Dependent Claim
32 words
The stool of claim 1 wherein said connecting means includes releasable locking means for securing said body support arm in a substantially horizontal position on either side of said point of attachment.
Claim 4
Dependent Claim
21 words
The stool of claim 1 wherein said releasable locking means includes means for biasing said connecting means toward a secured position.
Claim 5
Dependent Claim
12 words
The stool of claim 3 wherein said biasing means is a spring.
Claim 6
Dependent Claim
49 words
The stool of claims 1 wherein said connecting means permits rotation of said body support arm through a substantially 180° upwardly extending arc in a vertical plane about said point of attachment and prevents rotation through a downwardly extending arc in a vertical plane about said point of attachment.
Claim 7
Dependent Claim
48 words
The stool of claim 1 wherein said support means includes releasable movement-resisting means for resisting rotational movement of said body support arm in a predetermined direction in a horizontal plane about said support means when said body support arm depends from either side of said point of attachment.
Claim 8
Dependent Claim
106 words
The stool of claim 6 wherein: said support means includes a first rigid member secured at one end thereof to said seat, said first rigid member having at least a tubular portion at the other end thereof for receiving said releasable movement-resisting means, said connecting means includes a second rigid member extending from the point of connection to said body support arm, said second rigid member having at least a second tubular portion at the other end thereof for receiving said releasable movement-resisting means, and said releasable movement-resisting means comprises a cam lock, the ends of which are insertable into said first and second tubular portions.
Claim 9
Dependent Claim
23 words
The stool of claim 7 wherein said cam lock includes a cam and means biasing said cam toward engagement with said tubular portions.
Claim 10
Dependent Claim
12 words
The stool of claim 8 wherein said biasing means is a spring.
Claim 11
Dependent Claim
55 words
The stool of claims 7 wherein said cam lock is reversible between a first position and a second upside-down position, said cam lock cooperating with said tubular portion to resist clockwise rotational movement when said cam lock is in said first position and counterclockwise rotational movement when said cam lock is in said second position.
Claim 12
Dependent Claim
40 words
The stool of claim 1 wherein said support means is pivotally connected at one end to an underside of said seat at an off-center position for limiting the pivotal movement of said support means about the periphery of said seat.
Claim 13
Dependent Claim
147 words
A stool comprising: a seat; means depending from said seat for engaging a support surface; an arcuate, body support arm positioned above the level of said seat for supporting a portion of the body of a user, said body support arm having a concave surface; a vertical support member for supporting said body support arm above the level of said seat; and means connecting an end of said vertical support member and said body support arm, said connecting means permitting rotation of said body support arm through a substantially 180° arc in a vertical plane about its point of attachment to said connecting means from a first, substantially horizontal position in which said body support arm depends towards one side of said vertical support member to a second, substantially horizontal position in which said body support arm depends towards the other side of said vertical support member.
Claim 14
Dependent Claim
147 words
A stool comprising: a seat; means depending from said seat for engaging a support surface; an arcuate, body support arm positioned above the level of said seat for supporting a portion of the body of a user, said body support arm having a concave surface; a vertical support member for supporting said body support arm above the level of said seat; and means connecting an end of said vertical support member and said body support arm, said connecting means permitting rotation of said body support arm through a substantially 180° arc in a vertical plane about its point of attachment to said connecting means from a first, substantially horizontal position in which said body support arm depends towards one side of said vertical support member to a second, substantially horizontal position in which said body support arm depends towards the other side of said vertical support member.
Claim 15
Dependent Claim
16 words
The stool of claim 12 wherein the 180° arc extends upwardly from said point of attachment.
Claim 16
Dependent Claim
60 words
The stool of claim 13 wherein said connecting means comprises a support plate secured to said body support arm adjacent one end thereof and rotatable fastening means for securing said support plate to said end of said connecting means, said rotatable fastening means permitting transverse movement and rotational movement of said body support arm relative to said vertical support member.
Claim 17
Dependent Claim
33 words
The stool of claim 14 wherein said support plate and said rotatable fastening means have cooperative means thereon for releasably securing said body support arm in either of said first or second positions.
Claim 18
Dependent Claim
28 words
The stool of claim 15 wherein said cooperative means comprises a groove in said support plate and an ear on said rotatable fastening means for engaging said groove.
Claim 19
Dependent Claim
39 words
The stool of claim 15 wherein said support plate has a surface thereon for engaging a surface of an ear on said rotatable fastening means when said body support arm is in either of said first or second positions.
Claim 20
Dependent Claim
15 words
The stool of claim 15 wherein said cooperative means is biased toward a secured position.
Claim 21
Dependent Claim
49 words
The stool of claim 15 wherein said rotatable fastening means comprises releasable movement-resisting means for resisting rotational movement of said body support arm in a predetermined direction in a horizontal plane about said support member when said body support arm depends from either side of said point of attachment.
Claim 22
Dependent Claim
104 words
The stool of claim 19 wherein: said support means includes a first rigid member secured at one end thereof to said seat, said first rigid member having at least a tubular portion at the other end thereof for receiving said releasable movement resisting means, said connecting means includes a second rigid member extending from the point of connection to said body support arm, said second rigid member having at least a tubular portion at the other end thereof for receiving said releasable movement resisting means, said releasable movement resisting means comprising a cam lock, the ends of which are insertable into said tubular portions.
Claim 23
Dependent Claim
23 words
The stool of claim 20 wherein said cam lock includes an eccentric cam and means biasing said cam toward a movement resisting position.
Claim 24
Dependent Claim
12 words
The stool of claim 21 wherein said biasing means is a spring.
Claim 25
Dependent Claim
49 words
The stool of claim 19 wherein said cam lock is reversible between a first position and a second upside-down position, said cam lock resisting clockwise rotational movement when said cam lock is in said first position and counterclockwise rotational movement when said cam lock is in said second position.
Claim 26
Dependent Claim
124 words
A support arm assembly adapted for attachment to a stool having a seat comprising: an arcuate, body support arm for supporting a portion of the body of a user; a support member for supporting said body support arm above the level of the seat; and means connecting said support member and said body support arm, said connecting means permitting rotation of said body support arm through a substantially 180° arc in a vertical plane about the point of connection to said connecting means from a first, substantially horizontal position in which said body support arm depends towards one side of said support member to a second, substantially horizontal position in which said body support arm depends towards the other side of said support member.
Claim 27
Dependent Claim
124 words
A support arm assembly adapted for attachment to a stool having a seat comprising: an arcuate, body support arm for supporting a portion of the body of a user; a support member for supporting said body support arm above the level of the seat; and means connecting said support member and said body support arm, said connecting means permitting rotation of said body support arm through a substantially 180° arc in a vertical plane about the point of connection to said connecting means from a first, substantially horizontal position in which said body support arm depends towards one side of said support member to a second, substantially horizontal position in which said body support arm depends towards the other side of said support member.
Claim 28
Dependent Claim
14 words
The support arm assembly of claim 24 wherein said 180° arc is upwardly extending.
Claim 29
Dependent Claim
54 words
The support arm assembly of claim 25 wherein said connecting means comprises a support plate secured to said body support arm adjacent one end thereof and means fastening said support plate to said support member, said fastening means permitting transverse movement and rotational movement of said body support arm relative to said support member.
Claim 30
Dependent Claim
34 words
The support arm assembly of claim 26 wherein said support plate and said fastening means have cooperative means thereon for releasably securing said body support arm in either of said first or second positions.
Claim 31
Dependent Claim
29 words
The support arm assembly of claim 27 wherein said cooperative means comprises a groove in said support plate and an ear on said fastening means for engaging said groove.
Claim 32
Dependent Claim
40 words
The support arm assembly of claim 27 wherein said support plate has a surface thereon for engaging a surface of an ear on said fastening means when said body support arm is in either of said first or second positions.
Claim 33
Dependent Claim
17 words
The support arm assembly of claim 27 wherein said cooperative means is biased toward a secured position.
Claim 34
Dependent Claim
35 words
The support arm assembly of claim 27 wherein said support member comprises releasable means for resisting rotational movement of said body support arm in a predetermined direction in a horizontal plane about a support member.
Claim 35
Dependent Claim
24 words
The support arm assembly of claim 31 wherein said releasable means for resisting rotational movement of said body support arm includes a cam lock.
Claim 36
Dependent Claim
25 words
The support arm assembly of claim 32 wherein said cam lock includes an eccentric cam and means biasing said cam toward a movement resisting position.
Claim 37
Dependent Claim
14 words
The support arm assembly of claim 33 wherein said biasing means is a spring.
Claim 38
Dependent Claim
53 words
The support arm assembly of claim 32 wherein said cam lock is reversible between a first position and a second upside-down position, said cam lock adapted to resist clockwise rotational movement when said cam lock is in said first position and counterclockwise rotational movement when said cam lock is in said second position.
Claim 39
Dependent Claim
125 words
A support arm assembly adapted for attachment to a support member of a stool comprising: an arcuate, body support arm for supporting a portion of the body of a user; and connecting means associated with said body support arm and the support member and adapted to attach said body support arm to the support member, said connecting means permitting rotation of said body support arm through a substantially 180° arc in a vertical plane about the point of connection to said body support arm from a first, substantially horizontal position in which said body support arm depends towards one side of the support member to a second, substantially horizontal position in which said body support arm depends towards the other side of the support member.
Claim 40
Dependent Claim
125 words
A support arm assembly adapted for attachment to a support member of a stool comprising: an arcuate, body support arm for supporting a portion of the body of a user; and connecting means associated with said body support arm and the support member and adapted to attach said body support arm to the support member, said connecting means permitting rotation of said body support arm through a substantially 180° arc in a vertical plane about the point of connection to said body support arm from a first, substantially horizontal position in which said body support arm depends towards one side of the support member to a second, substantially horizontal position in which said body support arm depends towards the other side of the support member.
Claim 41
Dependent Claim
14 words
The support arm assembly of claim 36 wherein said 180° arc is upwardly extending.
Claim 42
Dependent Claim
56 words
The support arm assembly of claim 37 wherein said connecting means comprises a support plate secured to said body support arm adjacent one ends thereof and means adapted to fasten said support plate to the support member, said fastening means permitting transverse movement and rotational movement of said body support arm relative to the support member.
Claim 43
Dependent Claim
33 words
The support arm assembly of claim 38 wherein said support plate has means thereon for releasably securing said body support arm to said fastening means in either of said first or second positions.
Claim 44
Dependent Claim
19 words
The support arm assembly of claim 39 wherein said releasable securing means comprises a groove in said support plate.
Claim 45
Dependent Claim
37 words
The support arm assembly of claim 39 wherein said support plate has a surface thereon for engaging a surface on said fastening means when said body support arm is in either of said first or second positions.
Claim 46
Dependent Claim
18 words
The support arm assembly of claim 39 wherein said releasable securing means is biased toward a secured position.
Claim 47
Dependent Claim
137 words
A stool comprising: a seat; means depending from the seat for engaging a support surface; an arcuate, body support arm positioned above the level of said seat for supporting a portion of the body of a user, said support arm having a concave surface; support means supporting said body support arm above the level of said seat, said support means being pivotally connected at one end to an underside of said seat at an off-center position for limiting the pivotal movement of said support means about the periphery of said seat, and connecting means for rotatably attaching said end of said support arm to a top end of said connecting means, said body support arm being reversibly rotatably secured about its point of attachment to said connecting means on either side thereof in a substantially horizontal position.
Claim 48
Dependent Claim
137 words
A stool comprising: a seat; means depending from the seat for engaging a support surface; an arcuate, body support arm positioned above the level of said seat for supporting a portion of the body of a user, said support arm having a concave surface; support means supporting said body support arm above the level of said seat, said support means being pivotally connected at one end to an underside of said seat at an off-center position for limiting the pivotal movement of said support means about the periphery of said seat, and connecting means for rotatably attaching said end of said support arm to a top end of said connecting means, said body support arm being reversibly rotatably secured about its point of attachment to said connecting means on either side thereof in a substantially horizontal position.
References Cited (Backward Citations)
US188592A
Cited
US438610A
Cited
US527056A
Cited
US2568988A
Cited
US3147946A
Cited
US3338626A
Cited
US4025112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |