Claims
- 1. A hasp-type latch comprising:
- (a) a hasp member having: a pad and an elongated leaf having one end portion pivotably mounted on said pad and having an aperture therethrough adjacent its other end;
- (b) a staple member having:
- (i) a base with a top wall and a depending sidewall defining a cavity thereunder, said top wall having an opening therethrough; and
- (ii) a post member with a pedestal portion extending through said opening into said cavity and a post portion extending above said top wall and through said aperture in said leaf in said closed position thereof, said pedestal portion having securing means thereon in said cavity extending beyond said opening to prevent it from being pulled through said opening in said top wall, said post member being rotatable on said base, said aperture in said leaf being elongated, said post portion being elongated and dimensioned and configured to extend through said aperture in said leaf in a first position wherein its elongate axis extends parallel to that of said aperture in said leaf and to overlie a portion of said leaf about said aperture when rotated into a second position;
- (iii) releasable latch means on said post portion engageable with said base to prevent rotation of said post portion from its second position to said first position; and
- (iv) combination lock means on said post member releasably engageable with said latch means to preclude its release from engagement with said base in said second position.
- 2. The latch in accordance with claim 1 wherein said latch means comprises an extensible element on said post portion engageable in a recess in said base to effect said prevention of rotation.
- 3. The latch in accordance with claim 2 wherein said latch means comprises a dog movable to engage in a recess in said base to prevent rotation of said post portion, said dog being movable upon operation of said lock means to its releasing position.
- 4. The latch in accordance with claim 3 wherein an actuator element extends upwardly from said dog and above said base for manipulation, said actuator element being movable radially inwardly with respect to said post member to withdraw said dog from said recess.
- 5. The latch in accordance with claim 4 wherein said combination lock means includes cam rings within said post member and rotatable by manipulation of the combination lock means to a locking position in which they prevent the radially inward movement of said actuator element.
- 6. The latch in accordance with claim 4 wherein said latch means includes means biasing said dog into its base engaging position.
CROSS-REFERENCE TO RELATED APPLICATION
The present invention is a continuation-in-part of Application Ser. No. 016,273 filed Feb. 19, 1987.
Latches of the hasp type have been widely employed in connection with industrial doors, gates and various other structures where a relatively strong, but relatively low cost latching assembly is desired to retain a door or gate in a closed position. Frequently such hasp-type latches will include a staple with a formed wire element providing a U-shaped structure which is intended to receive the shackle of a key lock or combination lock to hold the latch arm in a position therebelow and against the staple base.
In recent years, efforts have been made to improve the appearance of such latches, and also to provide greater strength. In some instances, cast structures have been used to provide the staple member. It has also been proposed to employ staple members which would have a post that is rotatable on the base and have a portion which overlies the latch arm in its closed position to act at least as a latching mechanism to hold the latch arm in closed position. One problem with such hasps has been the tendency for separate locks utilized in connection with the hasps to fall to the ground, be lost, or be stolen, while the latch is in the open position.
It is an object of the present invention to provide a novel hasp-type latch provided with a unitary combination lock on the staple.
It is also an object to provide such a latch which may be readily fabricated and which is durable, attractive, and simple to operate.
It has now been found that the foregoing and related objects may be readily attained in a hasp-type latch which includes a hasp member having a pad with an elongated leaf having one end portion pivotably mounted on the pad and having an aperture therethrough adjacent its other end. A staple member has a base with a top wall and a depending sidewall defining a cavity thereunder, and the top wall has an opening therethrough. A post member has a pedestal portion extending through the opening into the cavity and a post portion extending above the top wall and through the aperature in the leaf in the closed position thereof. The pedestal portion has securing means thereon in the cavity extending beyond the opening to prevent it from being pulled through the opening in the top wall, and the post member is rotatable on the base. The aperture in the leaf is elongated, and the post portion is elongated and dimensioned and configured to extend through the aperture in the leaf in a first position wherein its elongate axis extends parallel to that of the aperture in the leaf and to overlie a portion of the leaf about the aperture when rotated into a second portion. Releasable latch means is provided on the post portion engageable with the base member to prevent rotation of said post portion from its second position to its first position. Combination lock means on the post member is releasably engageable with the latch means to preclude its release from engagement with the base member in the second position.
Preferably, the latch means comprises an extensible element on the post portion engageable in a recess in the base member to effect the prevention of rotation.
Desirably, this is a dog movable to engage in a recess in the base to prevent rotation of the post portion, and the dog is movable upon operation of the lock to its releasing position. An actuator element extends upwardly from the dog and above the base for manipulation, and the actuator element is movable radially inwardly of the post member to withdraw the dog from the recess. Desirably, the combination lock includes cam rings within the post member and rotatable by manipulation of the combination lock to a locking position in which they prevent the radially inward movement of the actuator element. The latch means may include means biasing the dog into its base engaging position.
FIG. 1 is a perspective view of a hasp-type latch utilizing the combination lock staple member of the present invention and with the latch arm shown in the open position;
FIG. 2 is a top plan view thereof with the latch arm pivoted into the closed position;
FIG. 3 is a side elevational view thereof;
FIG. 4 is a plan view of the latch with the post member rotated 180.degree. into the latching position;
FIG. 5 is a fragmentary sectional view of the staple end in the latched position of the post member of FIGS. 1-4 and drawn to an enlarged scale with the slide element shown in the locked position in full line; and
FIG. 6 is a fragmentary, sectional view of the pedestal portion and slide element of FIG. 5 along the section line 6-6 thereof.
US Referenced Citations (71)
Foreign Referenced Citations (4)
| Number |
Date |
Country |
| 13039 |
May 1914 |
GBX |
| 279611 |
Nov 1927 |
GBX |
| 311036 |
May 1929 |
GBX |
| 314408 |
Jun 1929 |
GBX |
Non-Patent Literature Citations (1)
| Entry |
| Photographs of the Alliance Tool Company, HASP Structure. |
Continuation in Parts (1)
|
Number |
Date |
Country |
| Parent |
16273 |
Feb 1987 |
|
Patent Grant
4788837
