|Publication number||US3883965 A|
|Publication date||May 20, 1975|
|Filing date||Oct 9, 1973|
|Priority date||Oct 9, 1973|
|Publication number||US 3883965 A, US 3883965A, US-A-3883965, US3883965 A, US3883965A|
|Inventors||Poirier Jr Real J, Poirier Sr Real J|
|Original Assignee||Poirier Jr Real J, Poirier Sr Real J|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (11), Referenced by (47), Classifications (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent 11 1 Poirier, Sr. et al.
[ SNOW PLOW FRAME  inventors: Real J. Poirier, Sn; Real J. Poirier,
In, both of 5 Bridges Rd., Brimfield, Mass. 01010  Filed: Oct. 9, 1973  Appl. No.: 404,593
 US. Cl. 37/42 R; 172/801; 293/71 P  Int. Cl A0lb 61/04  Field of Search 37/42 R, 42 VL; 280/481; 293/71 P; 172/276, 801
 References Cited UNITED STATES PATENTS 1,833,859 11/1931 Robinson et al. 37/42 VL 2,144,357 1/1939 Booharin 293/71 P 2,643,470 6/1953 Kaeser 37/42 R 2,775,830 1/1957 Kenyon 37/42 R 2,841,894 7/1958 Valois 37/42 R 3,022,587 2/1962 Greeley 280/481 X 3,238,647 2/1966 Hall et 37/42 VL 1451 May 20, 1975 3,332,562 7/1967 Kokott 280/481 x 3,650,054 3/1972 i-lanson........ 37/42 v1. 3,689,054 9/1972 0611113110 293/71 1 3,808,? 14 5/1974 Reissinger 6! a1. 37/42 VL FOREIGN PATENTS 0R APPLICATIONS 471,288 5/1969 Switzerland 37/42 R 1,425,809 3/1965 France 280/481 Primary Examiner-E. l-l. Eickhoit Attorney, Agent, or Firm-Charles R. Pay
[5 7] ABSTRACT 8 Claims, 4 Drawing Figures WJENTED M29195 SHEET 2 OF 2 FIG. 2
SNOW PLOW FRAME BACKGROUND OF THE INVENTION Conventional snow plows are usually mounted to yield under pressure. the yielding action being resisted by springs. Most spring mounts cause the plow to pivot forwardly and this usually results in a great deal of damage to the plow where obstructions are encountered. resulting in a rough edge and dents in the blade. It is the object of the present invention to provide a pivotal action of the plow so that the blade thereof yields or retracts against the action of a new and improved air bag construction, resulting in better automatic control of the plow when obstructions are hit and in less damage to the blade.
SUMMARY OF THE INVENTION A rigid frame which may be of conventional construction is applied to a vehicle as usual in a vertical relation. At the low end of the frame there are provided plow support brackets which can pivot on a horizontal axis transverse of the vehicle. The plow is mounted on these brackets and the usual plow lifting mechanism etc.. can also be used.
An air bag construction is set to resist the rearward pivoting of the bracket but the air bags are set so that they allow the pivot action to take place when an obstruction is encountered, but when the obstruction is removed. the air bags move the plow back to its original plowing operational position.
The effect of this is that when an obstruction is hit. force is transmitted through the plow frame to the pivoted brackets which then pivot i.c., to the rear. This has the effect of allowing the plow to swing to the rear. retracting or yielding. The plow blade is therefore enabled to retract under conditions of hitting an obstructionv This in turn results in less damage to the plow blade as compared with conventional types of plow blades which are mounted for spring action to pivot in the opposite direction when the lower edge or working edge at road level strikes an obstruction.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a view in side elevation illustrating the invention'.
FIG. 2 is a front view of a plow frame; and FIG. 3 is a plan view of the air bag construction.
PREFERRED EMBODIMENT OF THE INVENTION A frame of any convenient description, such as those which are used in the prior art. is indicated at I and this is mounted in any way desired to the truck chassis which is shown at 12. This frame may have the usual plow lifter 14, I6, etc.. if desired.
At the lower end of frame II] it is provided with a pair of vertical legs 20. and conveniently pivoted thereon by pins or bolts 22. 22 are a pair of brackets generally indicated at 24. 24. Brackets 24 extend forwardly and are provided with a pair of apertures 26, 26 for the reception of pins holding the plow frame 28. the plow blade being shown at 30. It is to be understood that the plow and the plow frame 28 may be of any description but of course it should be liftable as by the lifter struc ture l4, l6 pivoting with the frame 28.
The brackets 24, 24 can pivot about their pivot pins 5 22, 22 to the dotted line position in FIG. I, in which case of course the plow blade 30 as a whole will retract and therefore when an obstruction is encountered at the road level the plow blade 30 will not be damaged to any extent because it retracts and does not resist the obstruction. as does the usual plow. which tends to pivot over towards the obstruction.
Brackets 24, 24 are mounted on a crossbeam 32 each having a rearwardly extending portion carrying pins 34 pivoting the air bag support structure 36 which in turn is pivoted at 38 to a cross-support 40 attached to the front axle or other part of the vehicle. As the brackets 24 turn counter clockwise. FIG. 1, they cause pressure plates 40 to start to compress the air bags 42 and the structure 36 tends to pivot clockwise. When the obstacle is removed or the plow lift over it. the air bags bring the plow back to operating positionv Frame 36 carries the telescoping guide member 44 which is pivoted at 46 to the beam 32 which connects brackets 24.
The air bags are provided with a pressure release valve 48 which in turn is connected as at 50 to a source of air under pressure not shown so that the air bags absorb the rearward motion of the brackets 24. 24 and return the plow to normal operating position holding it there in normal operation for plowing except when an obstruction is hit.
I. A snow plow and a snow plow frame for a vehicle. comprising a bracket pivoted on the frame. means mounting the snow plow on the pivoted bracket. the pivot axis of said bracket being horilontal and transverse of vehicle. direction and fielding. resilient air bag means resisting motion of the bracket in a rearward direction under impact from an obstruction encountered by the plow. the resilient means yielding to allow the plow to relatively yield from the obstruction.
2. The device of claim I including a support for said air bag means, said support being mounted on the vehicle on which the plow is mounted.
3. The device of claim 2 wherein said frame is pivoted with respect to the vehicle and with respect to the brackets.
4. The device of claim I including a relief valve for said air bag means.
5. The device of claim 4 including a source of air under pressure for replenishing said air bag means in the event of loss of pressure through relief the release valve.
6. The device of claim 1 including a pressure plate in contact with the air bag means. the bracket being connected to the pressure plate.
7. The device of claim I wherein the point of attachment of the plow to the bracket is below the pivot axis of the bracket.
8. The device of claim 2 wherein the air bag support is pivoted relative to the vehicle.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1833859 *||Feb 10, 1931||Nov 24, 1931||Eichhorst Rudolph W||Snowplow for railway tracks|
|US2144357 *||Jan 12, 1937||Jan 17, 1939||Dan Leskovsky||Vehicle bumper|
|US2643470 *||Mar 14, 1947||Jun 30, 1953||Kaeser George L||Wing plow structure|
|US2775830 *||Aug 28, 1951||Jan 1, 1957||Frink Sno Plows Inc||Reversible trip blade snow plow|
|US2841894 *||Feb 10, 1956||Jul 8, 1958||Valois Charles M||Combination bumper and bulldozer attachment|
|US3022587 *||Mar 16, 1959||Feb 27, 1962||F J Mccarthy Inc||Road scrapers|
|US3238647 *||Aug 27, 1963||Mar 8, 1966||Caterpillar Tractor Co||Resilient push dozer|
|US3332562 *||May 19, 1966||Jul 25, 1967||Kokott Ivan T||Vehicle pushing and lifting device for road service vehicles|
|US3650054 *||Dec 11, 1969||Mar 21, 1972||Meyer Products Inc||Tripping mechanism for a plow blade|
|US3689054 *||Jan 28, 1971||Sep 5, 1972||Mercadante||Combined vehicle chassis and air suspension system|
|US3808714 *||Jun 3, 1970||May 7, 1974||Reissinger G||Double bladed snowplow with overload release|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4024653 *||Mar 23, 1976||May 24, 1977||Caleb G. Morris||Bumper blade with tie-down attachment|
|US4031968 *||Oct 28, 1975||Jun 28, 1977||Caterpillar Tractor Co.||Cushioned push dozer device|
|US4570367 *||Jan 23, 1985||Feb 18, 1986||Stiansen & Oya A/S||Front-mounted, shock-absorbing attachment means for a snowplow on a vehicle|
|US6219943||Aug 4, 1998||Apr 24, 2001||Cives Corporation||Resilient mounting arrangement for moldboard|
|US6354025 *||Jan 8, 1999||Mar 12, 2002||Cives Corporation||Adjustable mounting arrangement for moldboard|
|US6354761 *||Jun 20, 2000||Mar 12, 2002||Mark E. Clements||Truck-mounted roller assembly|
|US6412200 *||Feb 1, 2001||Jul 2, 2002||Normand Savard||Retractable side wing assembly|
|US6516544 *||Oct 31, 1996||Feb 11, 2003||Solotec Corporation||Snow plow having an improved attachment means and an associated method|
|US6536141||Feb 25, 2002||Mar 25, 2003||Cives Corporation||Adjustable mounting arrangement for moldboard|
|US6792704 *||Nov 14, 2002||Sep 21, 2004||Andrew Harold Johnson||Air spring actuator weight transfer apparatus|
|US7334357 *||Oct 27, 2004||Feb 26, 2008||Altheide Charles E||Snowplow impact reduction system|
|US7627965 *||Nov 3, 2006||Dec 8, 2009||Agri-Cover, Inc.||Plow blade having integrally formed attachment channel|
|US7669353||Nov 3, 2006||Mar 2, 2010||Agri-Cover, Inc.||Snow plow having hitch tongue connecting member|
|US7676962||Nov 3, 2006||Mar 16, 2010||Agri-Cover, Inc.||Snow plow having reinforced mold board|
|US7676963||Nov 3, 2006||Mar 16, 2010||Agri-Cover, Inc.||Snow plow including mold board having back plate|
|US7676964||Nov 3, 2006||Mar 16, 2010||Agri-Cover, Inc.||Snow plow having wear minimizing apparatus|
|US7681335||Nov 3, 2006||Mar 23, 2010||Agri-Cover, Inc.||Snow plow having attachable biasing member|
|US7703222||Nov 3, 2006||Apr 27, 2010||Agri-Cover, Inc.||Snow plow having hitch tongue and pivoting mechanism|
|US7707753 *||Nov 3, 2006||May 4, 2010||Agri-Cover, Inc.||Multifunctional plow blade positioning apparatus and method|
|US7735245||Nov 3, 2006||Jun 15, 2010||Agri-Cover, Inc.||Snow plow having catch structure|
|US7735247||Nov 3, 2006||Jun 15, 2010||Agri-Cover, Inc.||Snow plow for all terrain vehicle|
|US7743534||Nov 3, 2006||Jun 29, 2010||Agri-Cover, Inc.||Snow plow having two-piece mold board|
|US7784199 *||Nov 3, 2006||Aug 31, 2010||Agri-Cover, Inc.||Snow plow having pivotal mounting apparatus|
|US8037625||Jul 28, 2010||Oct 18, 2011||Agri-Cover, Inc.||Snow plow having pivotal mounting apparatus|
|US8046939||Nov 30, 2006||Nov 1, 2011||Grant Hanson||Apparatus protecting vehicle with accessory when scraping edge of accessory strikes fixed object|
|US8069590||May 27, 2010||Dec 6, 2011||Agri-Cover, Inc.||Snow plow having limiting member|
|US8732988||Oct 31, 2011||May 27, 2014||Glenridge, Inc.||Implement with linkage assembly and work assembly wherein work assembly has dynamic skid shoe and a scraping edge|
|US8875419||Jul 25, 2011||Nov 4, 2014||Agri-Cover, Inc.||Snow plow|
|US8881433||Oct 31, 2011||Nov 11, 2014||Glenridge, Inc.||Implement attaching to a forward motion-producing machine for elevating an edge encountering an immovable object|
|US9080297||Apr 23, 2014||Jul 14, 2015||Glenridge, Inc.||Implement with linkage assembly and work assembly wherein work assembly has dynamic skid shoe and a scraping edge|
|US20030101626 *||Nov 14, 2002||Jun 5, 2003||Johnson Andrew Harold||Air spring actuator weight transfer apparatus|
|US20070056192 *||Nov 3, 2006||Mar 15, 2007||Charles Schmeichel||Plow blade having integrally formed attachment channel|
|US20070056193 *||Nov 3, 2006||Mar 15, 2007||Schmeichel Charles M||Snow plow having wear minimizing apparatus|
|US20070056194 *||Nov 3, 2006||Mar 15, 2007||Charles Schmeichel||Snow plow having attachable biasing member|
|US20070056196 *||Nov 3, 2006||Mar 15, 2007||Charles Schmeichel||Snow Plow Including Mold Board Having Back Plate|
|US20070062071 *||Nov 3, 2006||Mar 22, 2007||Charles Schmeichel||Snow plow having pivotal mounting apparatus|
|US20070062072 *||Nov 3, 2006||Mar 22, 2007||Charles Schmeichel||Snow plow having two-piece mold board|
|US20070062073 *||Nov 3, 2006||Mar 22, 2007||Charles Schmeichel||Multifunctional plow blade positioning apparatus and method|
|US20070062074 *||Nov 3, 2006||Mar 22, 2007||Charles Schmeichel||Snow plow having hitch tongue connecting member|
|US20070084090 *||Nov 3, 2006||Apr 19, 2007||Charles Schmeichel||Snow plow for all terrain vehicle|
|US20070128013 *||Dec 1, 2005||Jun 7, 2007||Grant Hanson||Apparatus protecting vehicle with bucket when bucket strikes fixed object|
|US20070266600 *||Nov 3, 2006||Nov 22, 2007||Charles Schmeichel||Snow plow having hitch tongue and pivoting mechanism|
|US20090093934 *||Nov 30, 2006||Apr 9, 2009||Grant Hanson||Apparatus Protecting Vehicle With Bucket When Bucket Strikes Fixed Object|
|US20100229432 *||May 27, 2010||Sep 16, 2010||Agri-Cover, Inc.||Snow plow having limiting member|
|EP0247583A1 *||May 26, 1987||Dec 2, 1987||Michael Rossmann||Pushing frame for a front-loading implement at a motor vehicle|
|WO2007064693A2 *||Nov 30, 2006||Jun 7, 2007||Grant Hanson||Apparatus protecting vehicle with accessory when scraping edge of accessory strikes fixed object|
|WO2007064693A3 *||Nov 30, 2006||May 14, 2009||Grant Hanson||Apparatus protecting vehicle with accessory when scraping edge of accessory strikes fixed object|
|U.S. Classification||37/232, 293/134, 172/816|
|International Classification||E01H5/04, E01H5/06|