Locks – Portable – Padlocks
Patent
1983-03-04
1984-10-16
Wolfe, Robert L.
Locks
Portable
Padlocks
70 57, 70163, 70170, 70178, 70242, 138 89, E05B 6736
Patent
active
044766998
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a locking device of the kind stated in the preamble of appended claim 1. The locking device is primarily intended to be mounted on the fuel pipe nipple of an outboard motor so as to make it impossible to connect a fuel hose coupling and run the motor.
Such a locking device is known from the Swedish Laid-open Print No. 7801076-6. However, the known locking device is rather complicated and consists of a plurality of mutually movable parts, namely an external sleeve, an internal sleeve, a cylinder-type lock, a ball for axially securing the sleeves in a locking position and a coil spring acting axially between the sleeves and located at the outside of the internal sleeve.
The object of the present invention is to achieve a similar, but simplified locking device, comprising fewer parts, in particular without an external spring, and enabling a rational manufacture thereof and improved functional reliability.
This object is achieved by a locking device as defined in claim 1. Further advantageous features appear from claims 2 through 6.
The invention will be explained further below with reference to the appended drawing which illustrates a preferred embodiment.
FIG. 1 shows an axial section through a locking device according to the invention, the device being in a locking position on a fuel pipe nipple indicated by a dashed line;
FIG. 2 shows the locking device in an open position; and
FIG. 3 shows in a perspective view a ring included in the locking device and having bayonet locking grooves.
As shown in FIGS. 1 and 2, the inventive locking device comprises an elongated external sleeve 1 of aluminum. A partition wall 3 provided with a central hole 2 divides the interior of the external sleeve into two cylindrical chambers 4 and 5.
The chamber 5 to the right in FIGS. 1 and 2 contains a standard lock 6 of the press button type being commercially available. This lock 6 consists of a cylindrical casing 7 and a cylinder lock 8 axially displaceable therein and having a central piston 9 extending through the central hole 2 of the partition wall 3. The casing is secured in a fixed position by means of a pin 10, which extends through a corresponding hole in the casing 7 into a blind hole in the external sleeve. This blind hole has been formed by drilling through an opposite hole 11 (dashed) in the external sleeve 1. Thereafter, the hole 11 has been filled. The pin 10 is secured to a ribbon spring 12 of spring steel mounted circumferentially at the inside of the casing. In this way, when mounting the lock unit 6, the latter can be inserted into the chamber 5, whereby the pin 10 snaps automatically into the blind hole of the external sleeve upon reaching its correct position. Thereafter, the casing 7 of the lock unit 6 is securely fastened inside the external sleeve 1.
Against the action of a conical pressure spring 13, the cylinder lock 8, preferably without the key, can be pushed from the position shown in FIG. 2 into the position shown in FIG. 1, so that the locking piston 9 is inserted axially somewhat into the second chamber 4 shown to the left in FIGS. 1 and 2.
In the second chamber 4 there is an axially freely movable, internal sleeve 14 also made of aluminum and closed at one of its end positions (to the right in FIGS. 1 and 2), so that it can be actuated by the piston 9. Moreover, the inside of the internal sleeve 14 is entirely open and dimensioned so as to receive the end portion of the pipe nipple 15, shown dashed in FIG. 1, without contact.
The pipe nipple 15 is of a conventional type used in outboard motors and intended to be connected to a fuel hose by means of a bayonet coupling being provided with two diametrically opposed, transversally protruding bayonet locking pins 16. To enable the connection to the pipe nipple 15 (instead of a fuel hose coupling), the external sleeve 1, in the region of the free opening of the chamber 4, is provided with a sleeve portion having a smaller inner diameter, namely in the form of a separate ring 17 likewise made of aluminum and maintained in the int
REFERENCES:
patent: 1329943 (1920-02-01), Weller et al.
patent: 2623378 (1952-12-01), Haver
patent: 2904121 (1959-09-01), Honeyman
patent: 3345710 (1967-10-01), Bush
patent: 4236395 (1980-12-01), Avaiusini
Cowab AB
Dubnicka Thomas J.
Wolfe Robert L.
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