CA1124706A - Two post air hoist - Google Patents
Two post air hoistInfo
- Publication number
- CA1124706A CA1124706A CA360,030A CA360030A CA1124706A CA 1124706 A CA1124706 A CA 1124706A CA 360030 A CA360030 A CA 360030A CA 1124706 A CA1124706 A CA 1124706A
- Authority
- CA
- Canada
- Prior art keywords
- cylinders
- posts
- cross beam
- arms
- cylinder
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
- B66F7/16—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks
- B66F7/20—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks by several jacks with means for maintaining the platforms horizontal during movement
Abstract
ABSTRACT OF DISCLOSURE
Two cylinders connected by a cross beam are sliding on two vertical posts raising and lowering the load that rests on arms hinged to two bars attached to the cylinders.
Two cylinders connected by a cross beam are sliding on two vertical posts raising and lowering the load that rests on arms hinged to two bars attached to the cylinders.
Description
SUMMARY OF THE INVENTION
My invention is directed toward a two post air hoist comprising two vertical posts on which two cylinders.rigidly connected by a beam are sliding raising and lowering the load that rests on four arms hinged to two bars attached to the two cylinders.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings~
, Fig 1 is a horizontal view of my invention;
Fig 2 is a cross sectional view along line 1~1 in Fig 1.
'7~
DETAI~ED DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to Fig 2, Two Posts 1 and 2 are mounted vertically on the flanges la and 2a. The cylinders 3 and 4 are sliding on the posts when air pressure is applied at the inlet 3a and 4a on the cylinders. The sealing between posts and cylinders is provided by the seals ~ and 6 on the posts and seals 7 and 8 on the cylinders. The load is resting on arms 9, 10, 11 and 12 hinged through the pins 13, 14, 1~ and 16 to the bars 17 and 18 that are attached to the cylinders. A
cross beam 19 is connecting rigidly the two cylinders.
Two angular deviation detecting switches 20 and 21 (mercury switches on other t,vpe) will assure that the two cylinders move so that the bar 19 is ~ept horizontal.
If for ex. cylinder 3 is higher than cylinder 4 the switch 20 will open contacts in the circuit of a solenoid valve on air line leading to inlet 3 until bar 19 becomes horizontal again.
Cavities 3b and 4b between posts and cylinders are filled with oil and connected through two small orifices lb and 2b to the space above the posts. When the cylinders are rising, the oil is forced through the orifices limiting the speed of cylinders.
While I have described my invention with particular reference to the drawings, such is not to be considered as limiting its actual scope.
My invention is directed toward a two post air hoist comprising two vertical posts on which two cylinders.rigidly connected by a beam are sliding raising and lowering the load that rests on four arms hinged to two bars attached to the two cylinders.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings~
, Fig 1 is a horizontal view of my invention;
Fig 2 is a cross sectional view along line 1~1 in Fig 1.
'7~
DETAI~ED DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to Fig 2, Two Posts 1 and 2 are mounted vertically on the flanges la and 2a. The cylinders 3 and 4 are sliding on the posts when air pressure is applied at the inlet 3a and 4a on the cylinders. The sealing between posts and cylinders is provided by the seals ~ and 6 on the posts and seals 7 and 8 on the cylinders. The load is resting on arms 9, 10, 11 and 12 hinged through the pins 13, 14, 1~ and 16 to the bars 17 and 18 that are attached to the cylinders. A
cross beam 19 is connecting rigidly the two cylinders.
Two angular deviation detecting switches 20 and 21 (mercury switches on other t,vpe) will assure that the two cylinders move so that the bar 19 is ~ept horizontal.
If for ex. cylinder 3 is higher than cylinder 4 the switch 20 will open contacts in the circuit of a solenoid valve on air line leading to inlet 3 until bar 19 becomes horizontal again.
Cavities 3b and 4b between posts and cylinders are filled with oil and connected through two small orifices lb and 2b to the space above the posts. When the cylinders are rising, the oil is forced through the orifices limiting the speed of cylinders.
While I have described my invention with particular reference to the drawings, such is not to be considered as limiting its actual scope.
Claims (3)
1. A Two Post Hoist comprising:
two vertical posts on which two cylinders connected by a cross beam are sliding when air pressure is introduced in cylinders lifting an automotive vehicle or other load resting on four arms, two of which are pivoting on vertical pins attached to the lower end of one of the cylinders and the other two arms are in the same way attached to the other cylinder.
two vertical posts on which two cylinders connected by a cross beam are sliding when air pressure is introduced in cylinders lifting an automotive vehicle or other load resting on four arms, two of which are pivoting on vertical pins attached to the lower end of one of the cylinders and the other two arms are in the same way attached to the other cylinder.
2. The Two Post Hoist of claim 1 where one or more angular deviation detecting switches such as mercury switches are mounted on the cross beam connecting the cylinders to detect an unequal advance of cylinders and consequently reduce the pressure or shut off air flow to one of the cylinders to bring the cross beam to a horizontal position.
3. The Two Post Hoist of claim 1 where oil filled in the space between cylinder's walls and posts is forced to pass through a small orifice to the space above posts to limit the speed of cylinders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA360,030A CA1124706A (en) | 1980-09-10 | 1980-09-10 | Two post air hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA360,030A CA1124706A (en) | 1980-09-10 | 1980-09-10 | Two post air hoist |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1124706A true CA1124706A (en) | 1982-06-01 |
Family
ID=4117854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA360,030A Expired CA1124706A (en) | 1980-09-10 | 1980-09-10 | Two post air hoist |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1124706A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4763761A (en) * | 1987-02-27 | 1988-08-16 | Mckinsey Millard F | Lifting device |
-
1980
- 1980-09-10 CA CA360,030A patent/CA1124706A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4763761A (en) * | 1987-02-27 | 1988-08-16 | Mckinsey Millard F | Lifting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |