Load lifting device

• US 3,174,722 A
• Filed: 09/17/1962
• Issued: 03/23/1965
• Est. Priority Date: 09/17/1962
• Status: Expired due to Term

• Current Assignee: Erhard J. Alm
• Original Assignee: Erhard J. Alm
• Inventors: Alm, Erhard J.
• Application Number:
  US04/223,945
• Time in Patent Office: 918 Days
• US Class Current: 254/93.0HP
• CPC Class Codes: B66F 7/0625 with wheels for moving around the floor
• CPC Class Codes: B66F 7/065 Scissor linkages, i.e. X-configuration
• CPC Class Codes: B66F 7/08 hydraulically or pneumatically operated
• CPC Class Codes: B66F 7/085 pneumatically operated

Claims

1. IN A LOAD LIFTING APPARATUS INCLUDING A LOAD-ENGAGING FRAME AND A GROUND-ENGAGING FRAME AND TWO PAIRS OF HINGED LEVERS CONNECTED BETWEEN SAID FRAMES ONE PAIR OF EACH SIDE THEREOF, A FIRST ONE OF EACH OF SAID PAIRS OF LEVERS BEING CORRESPONDING AND A SECOND ONE OF EACH OF SAID PAIRS OF LEVERS BEING CORRESPONDING, THE IMPROVEMENT COMPRISING:

A FIRST PLATFORM HINGEDLY CONNECTED BETWEEN SAID CORRESPONDING FIRST LEVERS AND MOVABLY CONNECTED TO SAID CORRESPONDING SECOND LEVERS;

A SECOND PLATFORM HINGEDLY CONNECTED TO SAID SECOND CORRESPONDING LEVERS IN A SPACED APART RELATIONSHIP FROM SAID FIRST PLATFORM CONNECTIONS THERETO AND MOVABLY CONNECTED TO SAID FIRST CORRESPONDING LEVERS IN A SPACED APART RELATIONSHIP FROM SAID FIRST PLATFFORM CONNECTION THERETO, AND FLUID INFLATABLE MEANS CONSTRAINED TO EXPAND SUBSTANTIALLY VERTICALLY SECURED BETWEEN SAID FIRST AND SECOND PLATFORMS,