IP Library › Granted Patent US 6,941,685
Granted Patent B2
US 6,941,685 · App. 10/282,630 · Granted Sep 13, 2005

Snowplow assembly

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Quick Facts
Patent No.
US 6,941,685
App. No.
10/282,630
Granted
Sep 13, 2005
Kind
B2
Abstract

A snowplow assembly comprises a lift frame and A-frame operably pivotally connected together and an actuator operably connected between the lift frame and A-frame for effecting relative pivotal movement between the lift frame and A-frame. A plow blade includes a blade frame. The blade frame includes a tube of circular cross section which is operably pivotally connected to the A-frame. The tube is pivotally received by a quadrant, which is operably connected to the A-frame. A resilient element is operable between the blade frame and A-frame normally biasing a lower edge of the plow blade forwardly. The resilient element is an elastomeric loop. The pivotal connection of the plow blade to the A-frame in combination with the resilient element provides a trip function of the plow blade. The plow blade is a composite. The circular tube of the blade frame provides torsional stiffness to the composite blade.

Claims (52)

1. A snowplow assembly comprising:

an A-frame;

a plow blade operably pivotally connected to said A-frame; and

a nonmetallic resilient endless loop operably connected between said plow blade; and

the pivotal connection of said plow blade to said A-frame in combination with said resilient loop providing a trip function of said plow blade;

wherein said plow blade includes a blade frame, said blade frame including a tube of circular cross-section said tube operably pivotally connected to said A-frame.

2. The snowplow assembly of claim 1 wherein said tube of said blade frame is pivotally received by a quadrant, said quadrant operably connected to said A-frame.

3. The snowplow assembly of claim 2 wherein said tube includes a pair of stops which cooperate with a pair of urethane cushions on said quadrant to limit pivoting movement of said plow blade.

4. The snowplow assembly of claim 1 wherein said tube extends substantially the width of said plow blade.

5. A snowplow assembly comprising:

a lift frame and an A-frame operably pivotally connected together;

an actuator operably connected between said lift frame and A-frame for effecting relative pivotal movement between said lift frame and A-frame;

a plow blade operably pivotally connected to said A-frame; and

a nonmetallic resilient endless loop operably connected between said plow blade and A-frame in such a manner as to function as an extension spring member when said blade encounters an obstacle during forward movement;

the pivotal connection of said plow blade to said A-frame in combination with said resilient loop providing a trip function of said plow blade; and

wherein said plow blade includes a blade frame, said blade frame including a tube of circular cross-section, said tube operably pivotally connected to said A-frame.

6. The snowplow assembly of claim 5 wherein said tube of said blade frame is pivotally received by a quadrant, said quadrant operably connected to said A-frame.

7. A snowplow assembly comprising:

a lift frame and an A-frame operably pivotally connected together;

an actuator operably connected between said lift frame and A-frame for effecting relative pivotal movement between said lift frame and A-frame;

a plow blade operably pivotally connected to said A-frame; and

a nonmetallic resilient endless loop operably connected between said plow blade and A-frame;

the pivotal connection of said plow blade to said A-frame in combination with said resilient loop providing a trip function of said plow blade;

wherein said plow blade includes a blade frame, said blade frame including a tube of circular cross-section, said tube operably pivotally connected to said A-frame;

wherein said tube extends substantially the width of said plow blade.

8. A snowplow assembly comprising:

a lift frame and an A-frame operably pivotally connected together;

an actuator operably connected between said lift frame and A-frame for effecting relative pivotal movement between said lift frame and A-frame;

a plow blade operably pivotally connected to said A-frame; and

a nonmetallic resilient endless loop operably connected between said plow blade and A-frame;

the pivotal connection of said plow blade to said A-frame in combination with said resilient loop providing a trip function of said plow blade;

wherein said plow blade includes a blade frame, said blade frame including a tube of circular cross-section, said tube operably pivotally connected to said A-frame;

wherein said tube of said blade frame is pivotally received by a quadrant, said quadrant operably connected to said A-frame;

wherein said tube includes a pair of stops which cooperate with a pair of urethane cushions on said quadrant to limit pivoting movement of said plow blade.

9. A snowplow assembly comprising:

an A-frame; and

a plow blade including a tube of circular cross-section, said tube operably pivotally connected to said A-frame;

wherein said tube of said blade is pivotally received by a quadrant, said quadrant operably connected to said A-frame;

wherein said tube includes a pair of stops which cooperate with a pair of urethane cushions on said quadrant to limit pivoting movement of said plow blade.

10. A snowplow assembly comprising:

an A-frame;

a plow blade including a tube of circular cross-section, said tube operably pivotally connected to said A-frame; and

a nonmetallic resilient endless loop operably connected between said plow blade and A-frame;

the pivotal connection of said plow blade to said A-frame in combination with said resilient loop providing a hip function of said plow blade;

wherein said tube extends substantially the width of said plow blade.

11. A snowplow assembly comprising:

an A-frame;

a glow blade including a tube of circular cross-section, said tube operably pivotally connected to said A-frame; and

a nonmetallic resilient endless loop operably connected between said plow blade and A-frame in such a manner as to function as a tension spring member when said blade encounters an obstacle during forward movement;

the pivotal connection of said plow blade to said A-frame in combination with said resilient loop providing a trip function of said plow blade;

wherein said tube of said blade is pivotally received by a quadrant, said quadrant operably connected to said A-frame; and

wherein said tube includes a pair of stops which cooperate with a pair of urethane cushions on said quadrant to limit pivoting movement of said plow blade.

Assignments (14)
RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (019668/0230) Recorded Jun 10, 2021
From: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
To: DOUGLAS DYNAMICS HOLDINGS, INC.; DOUGLAS DYNAMICS, L.L.C.; DOUGLAS DYNAMICS FINANCE COMPANY; FISHER, LLC
Reel/Frame 056540/0138 →
RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (026165/0423) Recorded Jun 10, 2021
From: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
To: DOUGLAS DYNAMICS, L.L.C.; DOUGLAS DYNAMICS, INC.; DOUGLAS DYNAMICS FINANCE COMPANY; FISHER, LLC
Reel/Frame 056540/0199 →
SECURITY INTEREST Recorded Jun 10, 2021
From: DOUGLAS DYNAMICS, L.L.C.; TRYNEX INTERNATIONAL LLC; HENDERSON PRODUCTS, INC.; DEJANA TRUCK & UTILITY EQUIPMENT COMPANY, LLC
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 056538/0901 →
FIRST LIEN PATENT SECURITY AGREEMENT Recorded Apr 21, 2011
From: DOUGLAS DYNAMICS, INC.; DOUGLAS DYNAMICS, L.L.C.; DOUGLAS DYNAMICS FINANCE COMPANY; FISHER, LLC
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 026165/0423 →
RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY (FIRST LIEN) Recorded Apr 21, 2011
From: CREDIT SUISSE FIRST BOSTON
To: NEW DD, LLC; DDL ACQUISITION CORP.; DOUGLAS DYNAMICS HOLDINGS, INC. NOW KNOWN AS DOUGLAS DYNAMICS, INC.
Reel/Frame 026163/0012 →
RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY (SECOND LIEN) Recorded Apr 21, 2011
From: CREDIT SUISSE FIRST BOSTON
To: NEW DD, LLC; DDL ACQUISITION CORP.; DOUGLAS DYNAMICS HOLDINGS, INC. NOW KNOWN AS DOUGLAS DYNAMICS, INC.
Reel/Frame 026163/0065 →
RELEASE OF SECURITY INTEREST IN PATENTS Recorded Apr 20, 2011
From: CREDIT SUISSE, CAYMAN ISLANDS BRANCH
To: DOUGLAS DYNAMICS, INC.; DOUGLAS DYNAMICS, L.L.C.; DOUGLAS DYNAMICS FINANCE COMPANY; FISHER, LLC
Reel/Frame 026159/0361 →
FIRST LIEN PATENT SECURITY AGREEMENT Recorded Jul 23, 2007
From: DOUGLAS DYNAMICS HOLDINGS, INC.; DOUGLAS DYNAMICS, L.L.C.; DOUGLAS DYNAMICS FINANCE COMPANY; FISHER, LLC
To: CREDIT SUISSE, CAYMAN ISLANDS BRANCH
Reel/Frame 019580/0959 →
SECOND LIEN PATENT SECURITY AGREEMENT Recorded Jul 23, 2007
From: DOUGLAS DYNAMICS HOLDINGS, INC.; DOUGLAS DYNAMICS, L.L.C.; DOUGLAS DYNAMICS FINANCE COMPANY; FISHER, LLC
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 019668/0230 →
SECURITY INTEREST Recorded May 19, 2004
From: NEW DD, LLC
To: CREDIT SUISSE FIRST BOSTON (ACTING THROUGH ITS CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT)
Reel/Frame 015341/0585 →
CHANGE OF NAME Recorded May 19, 2004
From: NEW DD, LLC DELAWARE LIMITED LIABILITY COMPANY
To: DOUGLAS DYNAMICS, LLC
Reel/Frame 015348/0370 →
SECURITY INTEREST Recorded May 19, 2004
From: NEW DD, LLC, A DELAWARE LIMITED LIABILITY COMPANY; DDL ACQUISITION CORP., A CORP. OF DE; DOUGLAS DYNAMICS HOLDINGS, INC., A CORP. OF DE
To: CREDIT SUISSE FIRST BOSTON (ACTING THROUGH ITS CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT)
Reel/Frame 015355/0372 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 9, 2004
From: DOUGLAS DYNAMICS, L.L.C., DELAWARE LIMITED LIABILITY COMPANY
To: NEW DD, LLC, DELAWARE LIMITED LIABILITY COMPANY
Reel/Frame 015348/0613 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 29, 2002
From: GOY, MICHAEL; KLUCK, SCOTT; LEBLOND, ANDRE
To: DOUGLAS DYNAMICS, L.L.C.
Reel/Frame 013445/0721 →