Patent ID: 8297011

Claim:
An apparatus for retaining protective panels between a pair of window frame members comprising: a retainer bar having a first end and a second end, said retainer bar formed of a first bar member with a second bar member telescopically received therein; a first pad at the first end of said bar; a second pad at the second end of said bar; means for extending said second pad relative to said bar when said first pad and said second pad are placed against a support surface and said bar is rotated; means for locking said second pad at a select extension relative to said bar; means for biasing said first pad away from said first end of said bar to exert a tight force against one of said window frame members when said second pad is extended to engage another of said window frame members to securely anchor said bar, wherein said means for biasing said first pad includes a first end cap mounted on the first end of said bar, said end cap including a cavity and a central passageway with a plurality of Belleville washers received within said cavity and positioned between said end cap and said first pad.