CA1270739A - Sliding seat lock assembly - Google Patents
Sliding seat lock assemblyInfo
- Publication number
- CA1270739A CA1270739A CA000517411A CA517411A CA1270739A CA 1270739 A CA1270739 A CA 1270739A CA 000517411 A CA000517411 A CA 000517411A CA 517411 A CA517411 A CA 517411A CA 1270739 A CA1270739 A CA 1270739A
- Authority
- CA
- Canada
- Prior art keywords
- lock assembly
- seat
- recited
- engagement
- support member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C9/00—Stools for specified purposes
- A47C9/02—Office stools not provided for in main groups A47C1/00, A47C3/00 or A47C7/00; Workshop stools
- A47C9/025—Stools for standing or leaning against, e.g. in a semi-standing or half-seated position
Abstract
ABSTRACT
This invention relates to a sliding seat lock assembly particularly adapted for use in association with support means such as those which support the user's body while his feet remain in contact with the ground. The seat lock assembly comprises essentially a base which is displaceable relative to a support member; a means to guide the base along the support member; and a means adapted to frictionally engage with said support member; wherein the location of seat and of the engaging means relative to said guide means are such that a moment is created about one of said guide means when a user sits on the seat.
This invention relates to a sliding seat lock assembly particularly adapted for use in association with support means such as those which support the user's body while his feet remain in contact with the ground. The seat lock assembly comprises essentially a base which is displaceable relative to a support member; a means to guide the base along the support member; and a means adapted to frictionally engage with said support member; wherein the location of seat and of the engaging means relative to said guide means are such that a moment is created about one of said guide means when a user sits on the seat.
Description
'7~
SLIDING SEA_OCK ASSEMBLY
FIELD OF THE INVENTION
This invention relates to a sliding seat lock assembly particularly adapted Eor use in association with support means such as those described in Canadian patent application No. 494,975 filed on November 8, 1985.
DESCRIPTION OF PRIOR ART
.
Devices which use ~rictions to lock a part in position on a rod or other longitudinally extending member are known.
For example, in U.S. patent No. 3,749,345 (Luder et al) there is disclosed a rod supported shower slide ~ith an eccentrical clamp which includes a sliding body having a pin which carries an eccentric having a curvature corresponding to the curvature o~
the rod upon which the device is engaged. rrhe pin i5 adapted to be rotated to cause the eccentric to enter into holding engayement with the rod.
U.S. patent No. 3,995,963 (Mosley et al) discloses a sliding arm lock assembly, particularly adapted for use in a cardiac compressor, which comprises a locking member positioned within an opening in the arm and is likewise engageable with a post and slidable jointly with the arm along the axis o~ the post to initiate a clamping ~orce. A shaft having a handle assembly on one end is threadable in the locking member and hand ro-tatable to move the locking member laterally relative the post to secure the arm and post together at selected position relative to each other.
a~
.
Another example is shown in U.S. patent No.
29~,625 which discloses a glb operated by a pinion arm, for locking a saddle supporting a rock-drill in place on a post.
However, all of these devices require untightening and retightening when used. These operations require time and attention from the user.
OBJECTS OF THE INVENTION
An object of this invention is to provide a sliding seat lock assembly which is fast and easy to operate.
A second object of this invention, is to provide a sliding seat lock assembly which does not require -the application of force to lock the seat on the post.
Another object oE the invention is to provide A
sliding seat lock assembly which makes use oE the users weight to increase the holding capacity oE the seat.
In accordance with the present invention there is provided a sliding seat lock assembly which comprises means (which in the preferred embodiment ls a cam having a surface chosen for its frictional properties), a supporting member or post also covered with a material having a high coefficient of friction and a base to support the seat and said means.
,:
j , ~, ;, , , , .. . .
73~
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the lnvention can be understood and readLly carried into effect, and so that the above-mentioned objects will become apparent, a sliding seat lock assembly in accordance with the present invention will now be described by way of example only, with reference to the accompanying drawings in which:
figure 1 is a perspective view of a seat or support on which an embodiment of the invention is mounted;
figure 2 is a side view of the sliding sliding seat lock assembly shown in figure l;
figure 3 is a side sectional view (along line 3-3) of the sliding seat lock assembly shown in figure 5;
fi~ure ~ is a top partially sectiona:L view of an embodiment oE sliding seat :I.ock assembly in accordance~ w:Lth the invention;
figure 5 is a rear partially sectional view of an embodiment of sliding seat lock assembly in accordance with the invention.
DESCRIPTION OF A PREFERRED EMBODIMENT
Referring now specifically to the drawings, a seat supporting assembly 1 comprises a seat 30~ a support member 20 and a sliding seat lock assembly 10 having a base or casing 40, a cam 50, two (2) guide rollers 70 and two (2) handles 60.
, -, ~7q~
The casing 40 has two (2) side portions 42 and one (l) back portion 43. A seat 30 is pivotally attached to the upper section of back portion 43 by means of shaft 32. Further, a spring 33 allows seat 30 to automatically return to the upright position.
Side portions 42 have a triangular shape and comprise means to support the cam 50 and the guide rollers 70.
Cam 50 comprises a shaft 53 on which a body 52 having an involute shape, and two wheels 55 are secured Further, the body 52 is provided with a Erictional surface 54. The shaft 53 extends outwardly from both side portions 42 to support a pair of (2) handles 60, one at each end, which allow cam 50 to be rotated when they are rotated.
The handles 60 comprise a body 62, a covering 63 and a pin 64 which secures the body 62 to shaft 53, and a spriny 65 biaisiny the cam 50 in a position such that a portion of cam 50 is in engayement with supporting rnember 20. The supporting member 20 can also be provi~led with a surface 22 having a high coefficient of friction. The biaising force needs to be just enough to create a frictional re-taining force between surfaces 22 and 54 which will prevent the assembly from falling when the seat is not in use.
It will be seen from Eigure 3 that when a user sits on seat 30, a vertical force W is applied to the assembly. Force W causes cam 50 to act as a wedge thus increasing the retaining capabilities of the assembly. ~urthermore, lower roller 70 acts as a pivot joint such that a reaction force having a : :
. : .
,; .:
. ~
horizontal component R is applied to support member 20 by cam 50 thus considerably increasing the frictional retaining force generated between surfaces 22 and 5~. Thus, the assembly is held in holding engagement with support member 20.
When it is required to change the height of the seat 30, the user gets off the seat and turns said cam 50 in its position where surface 22 is no longer in con-tact with surface 54 and slides the assembly to the desired position on support member 20~ A pair of wheels 55 prevents that surfaces 22 and 54 from coming in contact while the user changes the height of seat 30. When this position is reached, the user releases the handle, which causes the cam to rotate so tha-t surfaces 22 and 54 are again in frictional engagement with each other and re-tain the assembly a-t the desired height.
It will be understood that the invention is described by way of an examp:Le on:Ly and that dl~ferent embodiments can be made w:ithout ~eparting from the .spirit of thf3 i.nvention.
~e>
~ ~ ,... ;.
'~-- ' ' ' .
.
SLIDING SEA_OCK ASSEMBLY
FIELD OF THE INVENTION
This invention relates to a sliding seat lock assembly particularly adapted Eor use in association with support means such as those described in Canadian patent application No. 494,975 filed on November 8, 1985.
DESCRIPTION OF PRIOR ART
.
Devices which use ~rictions to lock a part in position on a rod or other longitudinally extending member are known.
For example, in U.S. patent No. 3,749,345 (Luder et al) there is disclosed a rod supported shower slide ~ith an eccentrical clamp which includes a sliding body having a pin which carries an eccentric having a curvature corresponding to the curvature o~
the rod upon which the device is engaged. rrhe pin i5 adapted to be rotated to cause the eccentric to enter into holding engayement with the rod.
U.S. patent No. 3,995,963 (Mosley et al) discloses a sliding arm lock assembly, particularly adapted for use in a cardiac compressor, which comprises a locking member positioned within an opening in the arm and is likewise engageable with a post and slidable jointly with the arm along the axis o~ the post to initiate a clamping ~orce. A shaft having a handle assembly on one end is threadable in the locking member and hand ro-tatable to move the locking member laterally relative the post to secure the arm and post together at selected position relative to each other.
a~
.
Another example is shown in U.S. patent No.
29~,625 which discloses a glb operated by a pinion arm, for locking a saddle supporting a rock-drill in place on a post.
However, all of these devices require untightening and retightening when used. These operations require time and attention from the user.
OBJECTS OF THE INVENTION
An object of this invention is to provide a sliding seat lock assembly which is fast and easy to operate.
A second object of this invention, is to provide a sliding seat lock assembly which does not require -the application of force to lock the seat on the post.
Another object oE the invention is to provide A
sliding seat lock assembly which makes use oE the users weight to increase the holding capacity oE the seat.
In accordance with the present invention there is provided a sliding seat lock assembly which comprises means (which in the preferred embodiment ls a cam having a surface chosen for its frictional properties), a supporting member or post also covered with a material having a high coefficient of friction and a base to support the seat and said means.
,:
j , ~, ;, , , , .. . .
73~
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the lnvention can be understood and readLly carried into effect, and so that the above-mentioned objects will become apparent, a sliding seat lock assembly in accordance with the present invention will now be described by way of example only, with reference to the accompanying drawings in which:
figure 1 is a perspective view of a seat or support on which an embodiment of the invention is mounted;
figure 2 is a side view of the sliding sliding seat lock assembly shown in figure l;
figure 3 is a side sectional view (along line 3-3) of the sliding seat lock assembly shown in figure 5;
fi~ure ~ is a top partially sectiona:L view of an embodiment oE sliding seat :I.ock assembly in accordance~ w:Lth the invention;
figure 5 is a rear partially sectional view of an embodiment of sliding seat lock assembly in accordance with the invention.
DESCRIPTION OF A PREFERRED EMBODIMENT
Referring now specifically to the drawings, a seat supporting assembly 1 comprises a seat 30~ a support member 20 and a sliding seat lock assembly 10 having a base or casing 40, a cam 50, two (2) guide rollers 70 and two (2) handles 60.
, -, ~7q~
The casing 40 has two (2) side portions 42 and one (l) back portion 43. A seat 30 is pivotally attached to the upper section of back portion 43 by means of shaft 32. Further, a spring 33 allows seat 30 to automatically return to the upright position.
Side portions 42 have a triangular shape and comprise means to support the cam 50 and the guide rollers 70.
Cam 50 comprises a shaft 53 on which a body 52 having an involute shape, and two wheels 55 are secured Further, the body 52 is provided with a Erictional surface 54. The shaft 53 extends outwardly from both side portions 42 to support a pair of (2) handles 60, one at each end, which allow cam 50 to be rotated when they are rotated.
The handles 60 comprise a body 62, a covering 63 and a pin 64 which secures the body 62 to shaft 53, and a spriny 65 biaisiny the cam 50 in a position such that a portion of cam 50 is in engayement with supporting rnember 20. The supporting member 20 can also be provi~led with a surface 22 having a high coefficient of friction. The biaising force needs to be just enough to create a frictional re-taining force between surfaces 22 and 54 which will prevent the assembly from falling when the seat is not in use.
It will be seen from Eigure 3 that when a user sits on seat 30, a vertical force W is applied to the assembly. Force W causes cam 50 to act as a wedge thus increasing the retaining capabilities of the assembly. ~urthermore, lower roller 70 acts as a pivot joint such that a reaction force having a : :
. : .
,; .:
. ~
horizontal component R is applied to support member 20 by cam 50 thus considerably increasing the frictional retaining force generated between surfaces 22 and 5~. Thus, the assembly is held in holding engagement with support member 20.
When it is required to change the height of the seat 30, the user gets off the seat and turns said cam 50 in its position where surface 22 is no longer in con-tact with surface 54 and slides the assembly to the desired position on support member 20~ A pair of wheels 55 prevents that surfaces 22 and 54 from coming in contact while the user changes the height of seat 30. When this position is reached, the user releases the handle, which causes the cam to rotate so tha-t surfaces 22 and 54 are again in frictional engagement with each other and re-tain the assembly a-t the desired height.
It will be understood that the invention is described by way of an examp:Le on:Ly and that dl~ferent embodiments can be made w:ithout ~eparting from the .spirit of thf3 i.nvention.
~e>
~ ~ ,... ;.
'~-- ' ' ' .
.
Claims (10)
1. A lock assembly for retaining a sliding seat in any desired position in relation to a support member comprising:
(a) a base which is displaceable relative to the support member;
(b) means to guide the base along the support member;
(c) seat attaching means;
(d) means adapted to engage with said support member;
wherein the location of the seat and of the engaging means relative to said guide means are such that a moment is created about one of said guide means when a user sits on the seat.
(a) a base which is displaceable relative to the support member;
(b) means to guide the base along the support member;
(c) seat attaching means;
(d) means adapted to engage with said support member;
wherein the location of the seat and of the engaging means relative to said guide means are such that a moment is created about one of said guide means when a user sits on the seat.
2. A lock assembly as recited in claim 1 comprising a means to move said engagement means from a first engagement position to a second non engagement position.
3. A lock assembly as recited in claim 1 in which the said engagement means are a cam.
4. A lock assembly as recited in claim 3 in which the supporting member and the cam are provided with engagement surfaces having a high coefficient of friction.
5. A lock assembly as recited in claim 2, 3 or 4 in which the moving means comprise a handle and a spring for biasing the engagement means in said first position.
6. A lock assembly as recited in claim 3 or 4 in which the said cam has an involute engagement surface.
7. A lock assembly as recited in claim 1, 3 or 4 wherein said seat is displaceable from a seating position to a supporting position.
8. A lock assembly as recited in claim 1, 3 or 4 wherein said seat is normally biased to a supporting position, but is displaceable to a seating position.
9. A lock assembly as recited in claim 1 or 2 in which the said engagement means and support members comprise engagement surfaces having a complementary configuration.
10. A lock assembly as recited in claim 1 or 2 in which the said engagement means and support members comprise engagement surfaces having a high coefficient of friction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000517411A CA1270739A (en) | 1986-09-03 | 1986-09-03 | Sliding seat lock assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000517411A CA1270739A (en) | 1986-09-03 | 1986-09-03 | Sliding seat lock assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1270739A true CA1270739A (en) | 1990-06-26 |
Family
ID=4133852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000517411A Expired - Lifetime CA1270739A (en) | 1986-09-03 | 1986-09-03 | Sliding seat lock assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1270739A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0517006A1 (en) * | 1991-06-01 | 1992-12-09 | SIFA Sitzfabrik GmbH | Standing-stool |
-
1986
- 1986-09-03 CA CA000517411A patent/CA1270739A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0517006A1 (en) * | 1991-06-01 | 1992-12-09 | SIFA Sitzfabrik GmbH | Standing-stool |
| US5328240A (en) * | 1991-06-01 | 1994-07-12 | Sifa Sitzbabrik Gmbh | Support for a seat including a pedestal adapted to receive a vertically inclined column |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4988114A (en) | Remotely operated wheelchair footrest moving device | |
| US5154377A (en) | Golf bag stand | |
| US5358204A (en) | Folding keyboard stand | |
| US4503943A (en) | Caster with a stopper | |
| US20020053823A1 (en) | Infant's restraining seat | |
| US4951328A (en) | Swivel open bottom seat assembly for invalids | |
| AU2003255084A1 (en) | Adjustable cup holder | |
| SE467730B (en) | LINCH ROLL WITH A FIXING DEVICE | |
| EP0563361B1 (en) | Improved cradle assembly for a moveable arm support system | |
| US5000418A (en) | Device for temporarily fixing a stick to a support | |
| FR2591886A1 (en) | LIFTING MACHINE FOR INVALID | |
| ZA200510200B (en) | Device for height adjustment of a child seat and telescopically adjustable foot support | |
| US5167364A (en) | Rotatable mounting assembly for a rural mailbox | |
| US5505415A (en) | Tripod | |
| US4645081A (en) | Rotatable and vertically adjustable single-column presentation stand | |
| CA2013667A1 (en) | Tree climbing stand | |
| CA1270739A (en) | Sliding seat lock assembly | |
| WO2001076421A1 (en) | Chair and table assembly | |
| GB2229102A (en) | Pole climbing aid | |
| US5860490A (en) | Monopole ladder | |
| US5484153A (en) | Motorcycle kickstand accessory | |
| US5478138A (en) | Security device for a foldable chair | |
| WO2001000058A1 (en) | Method of using an open book securing device for hands-free reading of an open book | |
| GB2321081A (en) | Safety catch with rubber cap | |
| US5829068A (en) | Toilet seat raising and lowering device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |