US1815907A - Elevator - Google Patents

Elevator Download PDF

Info

Publication number
US1815907A
US1815907A US264345A US26434528A US1815907A US 1815907 A US1815907 A US 1815907A US 264345 A US264345 A US 264345A US 26434528 A US26434528 A US 26434528A US 1815907 A US1815907 A US 1815907A
Authority
US
United States
Prior art keywords
cylinder
piston
valve
conduit
movement
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
Application number
US264345A
Inventor
Stanley M Halstead
Anton I Wickland
Wayne C Tustin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WAYNE CO
Original Assignee
WAYNE CO
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WAYNE CO filed Critical WAYNE CO
Priority to US264345A priority Critical patent/US1815907A/en
Application granted granted Critical
Publication of US1815907A publication Critical patent/US1815907A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F7/00Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/10Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
    • B66F7/16Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks
    • B66F7/18Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks by a single central jack

Definitions

  • This invention relates particularly to that type of elevators now used inelevating motor vehicles for cleaning, lubricating, and so on.
  • 'It is common practice in devices of this ⁇ kind to effect the elevation ofa reciprocating piston, with the load thereon, by introducing into the cylinder and below the piston a suitable liquid under pressure.
  • This liquid is ordinarily supplied from a tank where air pressure is applied thereto or removed therefrom, or it may be contained within the piston and cylinder and transferred directly from one to the other as the piston rises or falls. In either case the movement of the piston is controlled by the air pressure, but since air is elastic the closing of a valve in the air line does not immediately stop the movement of the piston.
  • the invention may consist of certain novel features of construction andoperation
  • Figure 1 is a vertical transverse section 46 through the device, partly in'elevation.
  • FIG. 2 is an enlarged sectional view of --'the lower piston bearing.
  • this cylinder 18 mounted a packing or stufling box of the type shown in Figure 2, and in the center of its lower end is formed a passage 3.
  • a passage 3 Concentrically arranged in cylinder 1 and communicating with the passage 3 but closed off from the interior of the cylinder, is an upstanding conduit 4 converging somewhat at its upper end as at 5 and provided with a number of orifices in its side wall near said upper end as indicated at 6.
  • Communicating with the passage 3 is a pipe 7 extending to any readily accessible position where it is fitted with a valve 8 and thence back to and the cylinder 1 at any suitable point as 9.
  • a vertically movable cylinder or piston 10 Concentrically mounted in cylinder 1 is a vertically movable cylinder or piston 10 of less diameter than cylinder 1 and extending through packing box 11.
  • Bearing rings as 12 and 13 are fitted in cylinder 1, both bearings being provided with passages 14 and also functioning as a stop for cylinder 10 which is provided with a flange as 15 for this purpose.
  • the upper end of the cylinder 10 car ries any suitable type of head as 16.
  • This cylinder is entirely closed except at the bottom where it is provided with an opening 17 through which the conduit 4 passes, and it is fitted with a packing or stufiing box 18 removably mounted therein as indicated at 18a.
  • Conduit 19 we show a conduit passing upwardly through the bottom of cylinder 1 and through conduit 4 to the upper part of cylinder 10 when in its lowest position.
  • Conduit 19 also extends to any readily accessible position, preferably adjacent valve 8, where it is fitted with a valve 20, and thence to a source of air pressure not shown.
  • valve 8 When the elevator has been constructed and assembled as above set forth, and the pipe 7 and the cylinders 1 and 10 filled with oil, the latter to a suitable level as 21, it is ready for use. With the valve 8 closed the valve 20 may be opened and air under any desire pressure 10 above the. level of the liquid therein. There 'will be no movement of the cylinder 10 at this time because the pressure applied to the liquid bears against the closed valve 8, being carried through orifices 6 and pipe 7, but when the valve 8 is opened the oil is Even though the air pressure forced into the cylinder 1 and against the bottom of cylinder 10 thereby causing it to rise.
  • An elevator comprising a hollow c linder, a second hollow cylinder mounted or vertical movement therein and forming a pressure chamber therewith, a valve controlled conduit communicating with said cylinders and extending into and connected to said second cylinder and having an opening therein, a non-compressible fluid filling said conduit and pressure chamber and a portion of said second cylinder to a point above said opening, means mounted on the second cylinder adapted to close said opening toward the close of its upward movement, means for introducing a compressible fluid into the second cylinder and for exhausting the same therefrom.
  • An elevator comprising a hollow cylinder, a hollow piston mounted to reciprocate relative thereto and forming a pressure chamber therewith, a valve controlled conduit communicating directly with the piston and cylinder, an incompressible fluid filling said conduit and pressure chamber and a'portion of said piston, and valve controlled means to introduce a compressible fluid into the piston.
  • An elevator comprising a hollow cylinder, a hollow piston mounted to reciprocate relative thereto, a valve" controlled conduit communicating directly with the piston and cylinder, piston controlled valve means for I sible pressure chamber therewith, a conduit di-- rectly communicating with the pressure chamber and opening into the second cylinder, anon-compressible fluid in said conduit and in said pressure chamber, and in the second cylinder, means controlled by the second cylinder to shut off the flow of the fluid into the conduit from the second cylinder as the latter approaches the limit of its upward movement, means. for introducing a compresfluidinto the second cylinder, and means for controlling the exhaust of the compressible fluid from the second cylinder.
  • a non-compressible fluid circuit including the cylinder and piston interior, means to supply a compressible'fluid to the surface of the non-compressiblefluid in the piston, means to exhaust the compressible fluid from the piston, and automatic means carried by said piston and operable by the upward movement of the piston to interrupt said circuit as the piston approaches the limit of its upward movement.
  • a liftin device the combination of a cylinder, a ollow piston reciprocably mounted therein and spaced therefrom, spacing members "disposed between said piston and cylinder, one of said members forming a stop adapted to be engaged by a portion of said piston, fixed means for supplying fluid pressure said piston and cylinder for moving said piston, additional fixed means fOI 'COIldl1Ct1Hg fluid from said piston to said cyhnder, and means on said piston cooperata hollow cylinder, a secing with saidadditional fixed means for ar-.
  • a lifting device the combination of a [5 cylinder, a hollow piston reciprocably mounted therein, fixed means extending through said cylinder and piston and extending to a point adjacent the'top of said piston in inoperative position, a fixed mem- I bar extending intosaid piston and connected to a member connected to said cylinder, said fixed member and said last named member being constantly filled with a substantially incompressible fluid, means for introducing an- 5 other fluid to said piston formoving said first named fluid from said piston-to said cylinder to thereby move said piston, and means on said piston cooperating with said fixed member for closing communication be- Y tween said piston and cylinder after a predetermined movement of said piston.
  • STANLEY'M. HALSTEAD the combination of a [5 cylinder, a hollow piston reciprocably mounted therein, fixed means extending through said cylinder and piston and extending to a point adjacent the'top of said piston in inoperative position, a fixed mem- I bar extending intosaid piston and connected to a member connected

Description

S. M. HALSTEAD ET AL ELEVATOR Filed March 24, 1928 July 28, 1931.
17V VIA 14702;?
,4 TToP/VE') Patented July 28, 1931" umrsosmras PATENT OFFICE 'STANLEY M. HALSTEAJ), ANTON I. WICKLAND, AND WAYNE C. TUSTIN, OF SAN JOSE,
CALIFORNIA, ASSIGNOR S, BY DIRECT AND MESNE ASSIGNMENTS, TO WAYNE COM- PANY, OF FORT WAYNE, INDIANA, A CORPORATION OF INDIANA ELEVATOR Application filed March 24, 1928. Serial No. 264,845.
This invention relates particularly to that type of elevators now used inelevating motor vehicles for cleaning, lubricating, and so on. 'It is common practice in devices of this {kind to effect the elevation ofa reciprocating piston, with the load thereon, by introducing into the cylinder and below the piston a suitable liquid under pressure. This liquid is ordinarily supplied from a tank where air pressure is applied thereto or removed therefrom, or it may be contained within the piston and cylinder and transferred directly from one to the other as the piston rises or falls. In either case the movement of the piston is controlled by the air pressure, but since air is elastic the closing of a valve in the air line does not immediately stop the movement of the piston.
It is the object of the present invention to provide a device of the character indicated wherein the piston is'under complete control of the operator and may be stopped instantly, thereby eliminating the dangers present in those devices where a gradual stopping only can be efi'ected.
It is also an objectof the invention to provide a device of the character indicated wherein the piston is automatically cushioned at the close of its 11 ward movement thereby eliminatin 'the sudden jarnow experienced in known evices of this kind.
It is a still further object of the invention to provide a device of the character indicated that will be simple in construction, economical to manufacture, and highly eflicient in its practical application. 7
With these and various other objects in view, the invention may consist of certain novel features of construction andoperation,
as will be more fully described and particuarly pointed out inthe s ecification, drawin and claims appende hereto.
- Til the drawings:
Figure 1 is a vertical transverse section 46 through the device, partly in'elevation.
Figure 2 is an enlarged sectional view of --'the lower piston bearing. I Referring now more particularly to the drawings, we show at 1 a vertically positioned cylinder suitably'mounted in a hole communicating with in the ground as 2.
At the upper end of this cylinder 18 mounted a packing or stufling box of the type shown in Figure 2, and in the center of its lower end is formed a passage 3. Concentrically arranged in cylinder 1 and communicating with the passage 3 but closed off from the interior of the cylinder, is an upstanding conduit 4 converging somewhat at its upper end as at 5 and provided with a number of orifices in its side wall near said upper end as indicated at 6. Communicating with the passage 3 is a pipe 7 extending to any readily accessible position where it is fitted with a valve 8 and thence back to and the cylinder 1 at any suitable point as 9.
Concentrically mounted in cylinder 1 is a vertically movable cylinder or piston 10 of less diameter than cylinder 1 and extending through packing box 11. Bearing rings as 12 and 13 are fitted in cylinder 1, both bearings being provided with passages 14 and also functioning as a stop for cylinder 10 which is provided with a flange as 15 for this purpose. The upper end of the cylinder 10 car ries any suitable type of head as 16. This cylinder is entirely closed except at the bottom where it is provided with an opening 17 through which the conduit 4 passes, and it is fitted with a packing or stufiing box 18 removably mounted therein as indicated at 18a.
At 19 we show a conduit passing upwardly through the bottom of cylinder 1 and through conduit 4 to the upper part of cylinder 10 when in its lowest position. Conduit 19 also extends to any readily accessible position, preferably adjacent valve 8, where it is fitted with a valve 20, and thence to a source of air pressure not shown.
When the elevator has been constructed and assembled as above set forth, and the pipe 7 and the cylinders 1 and 10 filled with oil, the latter to a suitable level as 21, it is ready for use. With the valve 8 closed the valve 20 may be opened and air under any desire pressure 10 above the. level of the liquid therein. There 'will be no movement of the cylinder 10 at this time because the pressure applied to the liquid bears against the closed valve 8, being carried through orifices 6 and pipe 7, but when the valve 8 is opened the oil is Even though the air pressure forced into the cylinder 1 and against the bottom of cylinder 10 thereby causing it to rise. Since the liquid is carried in a closed circuit between the cylinders 1' and 10 it is merely transferred as desired from one to the other so that when the valve 8 is again closed the movement of the cylinder 10 is instantly halted, regardless of the air pressure acting thereon. As the cylinder 10 approaches the upper limit of its movement, with valve 8 open, the bearing 18 moves over and successively closes the orifices 6 thereby gradually cutting off the flow of liquid therethrough and preventing the flange 15 from contacting with the stop 13 with a jar. The movement of the liquid is, of course, reversed when valve 20 is opened to permit reduction of the air pressure in cylinder 10. be exhausted to atmospheric pressure in cylinder 10 when there is a load on head 16, the downward movement of the cylinder is instantly stopped when valve 8 is closed.
It is to be understood, of course, that while we have particularly referred to oil as the liquid used in the device, any suitable noncompressible liquid may be used. It is to be further understood that changes in form, construction and method of assembly and operation may be made within the scope of the appended claims.
We claim:
1. An elevator comprising a hollow c linder, a second hollow cylinder mounted or vertical movement therein and forming a pressure chamber therewith, a valve controlled conduit communicating with said cylinders and extending into and connected to said second cylinder and having an opening therein, a non-compressible fluid filling said conduit and pressure chamber and a portion of said second cylinder to a point above said opening, means mounted on the second cylinder adapted to close said opening toward the close of its upward movement, means for introducing a compressible fluid into the second cylinder and for exhausting the same therefrom.
2. An elevator comprising a hollow cylinder, a hollow piston mounted to reciprocate relative thereto and forming a pressure chamber therewith, a valve controlled conduit communicating directly with the piston and cylinder, an incompressible fluid filling said conduit and pressure chamber and a'portion of said piston, and valve controlled means to introduce a compressible fluid into the piston.
3. An elevator comprising a hollow cylinder, a hollow piston mounted to reciprocate relative thereto, a valve" controlled conduit communicating directly with the piston and cylinder, piston controlled valve means for I sible pressure chamber therewith, a conduit di-- rectly communicating with the pressure chamber and opening into the second cylinder, anon-compressible fluid in said conduit and in said pressure chamber, and in the second cylinder, means controlled by the second cylinder to shut off the flow of the fluid into the conduit from the second cylinder as the latter approaches the limit of its upward movement, means. for introducing a compresfluidinto the second cylinder, and means for controlling the exhaust of the compressible fluid from the second cylinder.
5. In combination with a hollow cylinder and a hollow piston reciprocable with respect to each other, a non-compressible fluid circuit including the cylinder and piston interior, means to supply a compressible'fluid to the surface of the non-compressiblefluid in the piston, means to exhaust the compressible fluid from the piston, and automatic means carried by said piston and operable by the upward movement of the piston to interrupt said circuit as the piston approaches the limit of its upward movement.
6. In an elevator, ond hollow cylinder reciprocable with and spaced from the first cylinder, a. conduit communicating with the space between the cylinders and with the interior of the second cylinder, a non-compressible fluid in the conduit, in the space between the cylinders, and in the second cylinder, means carried by and controlled by the movement of thesecond cylinder to close said communication between the conduit and the second cylinder as the latter approaches a predetermined position, means to supply a compressible fluid to the surface of the non-compressible fluid, in the second cylinder, and means to exhaust said compressible fluid from the second cylinder.
7. In a liftin device, the combination of a cylinder, a ollow piston reciprocably mounted therein and spaced therefrom, spacing members "disposed between said piston and cylinder, one of said members forming a stop adapted to be engaged by a portion of said piston, fixed means for supplying fluid pressure said piston and cylinder for moving said piston, additional fixed means fOI 'COIldl1Ct1Hg fluid from said piston to said cyhnder, and means on said piston cooperata hollow cylinder, a secing with saidadditional fixed means for ar-.
8. In a lifting device, the combination of In said piston cooperating with said fixed member for closing communication between said piston and cylinder after a'predetermined movement of said piston.
9. In a lifting device, the combination of a [5 cylinder, a hollow piston reciprocably mounted therein, fixed means extending through said cylinder and piston and extending to a point adjacent the'top of said piston in inoperative position, a fixed mem- I bar extending intosaid piston and connected to a member connected to said cylinder, said fixed member and said last named member being constantly filled with a substantially incompressible fluid, means for introducing an- 5 other fluid to said piston formoving said first named fluid from said piston-to said cylinder to thereby move said piston, and means on said piston cooperating with said fixed member for closing communication be- Y tween said piston and cylinder after a predetermined movement of said piston. STANLEY'M. HALSTEAD. I
ANTON I. WICKLAND. WAYNE C. TUSTIN.
US264345A 1928-03-24 1928-03-24 Elevator Expired - Lifetime US1815907A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US264345A US1815907A (en) 1928-03-24 1928-03-24 Elevator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US264345A US1815907A (en) 1928-03-24 1928-03-24 Elevator

Publications (1)

Publication Number Publication Date
US1815907A true US1815907A (en) 1931-07-28

Family

ID=23005634

Family Applications (1)

Application Number Title Priority Date Filing Date
US264345A Expired - Lifetime US1815907A (en) 1928-03-24 1928-03-24 Elevator

Country Status (1)

Country Link
US (1) US1815907A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1271947B (en) * 1965-07-12 1968-07-04 Hans Peter Heyne Lifting platform for motor vehicles
US5931647A (en) * 1993-11-23 1999-08-03 Sarcos, Inc. Volumetric pump with bi-directional piston seal
US5941533A (en) * 1993-11-23 1999-08-24 Sarcos, Inc. Volumetric pump/valve sphincter seal
US6007310A (en) * 1993-11-23 1999-12-28 Sarcos, Lc Volumetric pump with sterility seal
US20040110589A1 (en) * 2002-12-09 2004-06-10 Williams Richard D. Ram-type tensioner assembly having integral hydraulic fluid accumulator
US20080314689A1 (en) * 2007-06-23 2008-12-25 Herrmann Ag Lifting platform for vehicles and other objects
US20150014616A1 (en) * 2013-07-10 2015-01-15 Herrmann Ag Lifting device and lifting platform with such a lifting device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1271947B (en) * 1965-07-12 1968-07-04 Hans Peter Heyne Lifting platform for motor vehicles
US5931647A (en) * 1993-11-23 1999-08-03 Sarcos, Inc. Volumetric pump with bi-directional piston seal
US5941533A (en) * 1993-11-23 1999-08-24 Sarcos, Inc. Volumetric pump/valve sphincter seal
US5944495A (en) * 1993-11-23 1999-08-31 Sarcos, Lc Volumetric pump actuator
US6007310A (en) * 1993-11-23 1999-12-28 Sarcos, Lc Volumetric pump with sterility seal
US20040110589A1 (en) * 2002-12-09 2004-06-10 Williams Richard D. Ram-type tensioner assembly having integral hydraulic fluid accumulator
US7008340B2 (en) * 2002-12-09 2006-03-07 Control Flow Inc. Ram-type tensioner assembly having integral hydraulic fluid accumulator
US20060154764A1 (en) * 2002-12-09 2006-07-13 Williams Richard D Ram-type tensioner assembly having integral hydraulic fluid accumulator
US7131922B2 (en) * 2002-12-09 2006-11-07 Control Flow Inc. Ram-type tensioner assembly having integral hydraulic fluid accumulator
US20080314689A1 (en) * 2007-06-23 2008-12-25 Herrmann Ag Lifting platform for vehicles and other objects
US8684141B2 (en) * 2007-06-23 2014-04-01 Herrmann Ag Lifting platform for vehicles and other objects
US20150014616A1 (en) * 2013-07-10 2015-01-15 Herrmann Ag Lifting device and lifting platform with such a lifting device
US9527703B2 (en) * 2013-07-10 2016-12-27 Herrmann Ag Lifting device and lifting platform with such a lifting device

Similar Documents

Publication Publication Date Title
US2287709A (en) Hydraulic well pumping mechanism
US1931452A (en) Hydraulic machine tool feed
US1815907A (en) Elevator
US2560676A (en) Pneumatic-hydraulic system for well pumping or drilling units
US2072595A (en) Well pumping apparatus
US2668517A (en) Hydraulic oil well pump jack
US2974490A (en) Bumper jack and fluid system
US947613A (en) Hydraulic jack.
US2056954A (en) Jacking apparatus
US2637302A (en) Low oil control
US2288511A (en) Automobile lift
US2197126A (en) Braking system
US2430361A (en) Air-line oiler
US2311468A (en) Hydraulic pump assemblage
US3081743A (en) Air actuated motor unit
US2364550A (en) Pumping device
US2394486A (en) Pump
US1908685A (en) Car lift and greasing device
US2705502A (en) Air venting device for the cylinder of a hydraulic vehicle lift
DE749784C (en) Pressure stilt for presses, scissors, punching or the like.
US2566295A (en) Hydraulic pumping jack
US1956112A (en) Pump
US1582614A (en) Pneumatic hammer
US1501917A (en) Oiling device for drill sharpeners
US2273349A (en) Pumping apparatus