Anti-theft device

Claim 1

An anti-theft device for releasably locking an internal combustion engine of a land vehicle to a mating transmission, the transmission having a housing with a plurality of bolt holes disposed in the peripheral portion thereof and the engine having a plurality of registered bolt holes in marginal flanges integral with the engine block, comprising: an L-shaped hard steel strap having an opening at the free end of the long leg for receiving the shackle of a padlock; a shaft fixedly secured at one end at the free end of the short leg and extending generally parallel to said long leg, said shaft having threads at the free end thereof, said shaft receivable in one of said engine and transmission housing registered bolt holes and having a length so as to project therefrom; a second L-shaped hard steel strap, one leg thereof having a hole for receiving the free end of said shaft and the other leg having an opening in registry with the opening in the free end of the long leg of said first strap for receiving the padlock shackle; and a nut threadably received on said shaft exterior of said second strap leg for clamping said transmission and engine housing between said strap legs.

Claim 5

A device for preventing theft of an engine of a land vehicle by releasably locking the engine to its mating transmission without any modification of the engine or transmission housing, the engine and transmission housing having a plurality of registered bolt holes each of which normally carries elongated conventional threaded bolts, the present device being substituted for one of the bolts and comprising: a U-shaped member, one leg of said member comprising a threaded shaft receivable in said bolt holes and projecting therefrom, the other long leg extending exteriorly of said transmission housing, parallel with said shaft, and having an opening near the free end thereof; an L-shaped member having one leg generally perpendicular to said shaft and having an opening for receiving the portion of said threaded shaft projecting from the registered boltholes, the other leg being parallel to said other long leg of said U-shaped member and having an opening in registry with said opening in said other long leg of said U-shaped member for receiving therethrough the shackle of a padlock; and a nut threadably received on said shaft exterior of said L-shaped member perpendicular leg.

Claim 6

A device for preventing theft of an engine of a land vehicle by releasably locking the engine to its mating transmission without any modification of the engine or transmission housing, the engine and transmission housing having a plurality of registered bolt holes each of which normally carries elongated conventional threaded bolts, the present device being substituted for one of the bolts and comprising: a U-shaped member, one leg of said member comprising a threaded shaft receivable in said bolt holes and projecting therefrom, the other long leg extending exteriorly of said transmission housing, parallel with said shaft, and having an opening near the free end thereof; an L-shaped member having one leg generally perpendicular to said shaft and having an opening for receiving the portion of said threaded shaft projecting from the registered boltholes, the other leg being parallel to said other long leg of said U-shaped member and having an opening in registry with said opening in said other long leg of said U-shaped member for receiving therethrough the shackle of a padlock; and a nut threadably received on said shaft exterior of said L-shaped member perpendicular leg.