Torque rated floating marine propeller wrench

• US 5,263,389 A
• Filed: 01/25/1993
• Issued: 11/23/1993
• Est. Priority Date: 01/25/1993
• Status: Expired due to Fees

• Current Assignee: Brunswick Corporation
• Original Assignee: Brunswick Corporation
• Inventors: Frazzell, Michael E., Karls, Michael A.
• Primary Examiner(s): MEISLIN, DEBRA S
• Application Number:
  US08/008,523
• Time in Patent Office: 302 Days
• Field of Search: 81/121.1, 81/124.3, 81/64, 81/900
• US Class Current: 81/124.3
• CPC Class Codes: B25B 13/00 Spanners; Wrenches hand-driven gear-operated B25B17/00; impact wrenches B25B19/00; portable power-driven B25B21/00 ; spanners or wrenches pecially adapted for osteosynthesis A61B17/8875; machines for fitting together or separating metal parts B23P19/00 ; for mounting or dismounting wheels B60B29/003
• CPC Class Codes: B25B 13/04 of ring jaw type
• CPC Class Codes: B25B 13/06 of socket type
• CPC Class Codes: B25B 13/48 for special purposes
• CPC Class Codes: B25B 23/1427 by mechanical means
• CPC Class Codes: Y10S 81/90 Wrench or screwdriver constructed from specific material

Abstract

A floating marine propeller wrench (18) is provided for removing a marine propeller nut (16), and comprises a floating member composed of a material selected to have a specific gravity less than or equal to 1.0, to enable floatation, yet strong enough to apply torque of at least 50 lb.ft. to the nut. The floating member is composed of chemically coupled long glass fiber reinforced polypropylene, particularly ten percent glass by weight, one percent foaming agent by weight, and the balance polypropylene. The material is also selected to provide a user detectable slight deflection (70) of a handle portion (24) when approximately 50 lb.ft. is applied to the nut by a socket portion (22), to provide a combined floating marine propeller wrench and torque meter.

Claims

1. A floating marine propeller wrench for removing a marine propeller nut, comprising a floating member composed of approximately 5 to 15 percent glass by weight, approximately 0.5 to 1.5 percent foaming agent by weight, and the balance polypropylene.

2. The invention according to claim 1 wherein said floating member is composed of chemically coupled long glass fiber reinforced polypropylene.

3. The invention according to claim 2 wherein said floating member is composed of chemically coupled long glass fiber reinforced polypropylene of the following properties:

space="preserve" listing-type="tabular">______________________________________ ASTM Property Method ______________________________________ Physical Specific Gravity D 792 0.96 Shrinkage D 955 .8-1.0% @ 0.125" thick Melt Point (Resin) D 3418 325°

F. Water Absorption D 570 0.02% Mechanical Tensile Strength D638 7,000 PSI (pounds per square inch) Tensile Elongation D638 3-5% Flexural Strength D 790 7,500 PSI Flexural Modulus D 790 375,000 PSI Izod lmpact D 256 1.5 FT-LB/IN (Cut Notch) Izod Impact D 256 7-9 FT-LB/IN (Unnotched) Thermal H.D.T.U.L. D 648 275°

F. (Heat Deflection Temperature Under Load) (DEG F.;

@ 264 PSI) ______________________________________

4. A floating marine propeller wrench for removing a marine propeller nut, comprising a floating member having a socket portion for engaging said nut and a handle portion extending from said socket portion, and a reinforcing ring around said socket portion having a tensile strength of at least about 75,000 PSI and a weight less than about 0.25 ounce.

5. The invention according to claim 4 wherein said ring is an annular stainless steel member having an annular thickness of about 0.035 inch, and a height of about 0.2 inch, said thickness being along a radial direction relative to the propeller rotational axis, said height being along an axial direction parallel to said axis.

6. The invention according to claim 4 further comprising in combination a pin extending from said member for engaging a hole in a locking tab of a locking tab type marine propeller washer, to bend the tab to unlock the washer, wherein in combination said ring and said pin are metal, and said floating member is composed of a material having a specific gravity sufficiently less than 1.0 to compensate for said metal ring and metal pin, to enable floatation of said floating member with said ring and said pin attached thereto.

7. The invention according to claim 6 wherein said floating member is composed of chemically coupled long glass fiber reinforced polypropylene.